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1

ON RINGS AND STREAMS IN THE GALACTIC ANTI-CENTER  

SciTech Connect

We confirm that there are at least three separate low-latitude overdensities of blue F turnoff stars near the Milky Way anti-center: the Monoceros Ring, the Anti-Center Stream (ACS), and the Eastern Banded Structure (EBS). There might also be a small number of normal thick disk stars at the same location. The ACS is a tilted component that extends to higher Galactic latitude at lower Galactic longitude, 10 kpc from the Sun toward the anti-center. It has a sharp cutoff on the high-latitude side. Distance, velocity, and proper motion measurements are consistent with previous orbit fits. The mean metallicity is [Fe/H] =-0.96 {+-} 0.03, which is lower than the thick disk and Monoceros Ring. The Monoceros Ring is a higher density substructure that is present at 15 Degree-Sign < b < 22 Degree-Sign at all longitudes probed in this survey. The structure likely continues toward lower latitudes. The distances are consistent with a constant distance from the Galactic center of 17.6 kpc. The mean line-of-sight velocity of the structure is consistent with a thick disk rotation. However, the velocity dispersion of these stars is {approx}15 km s{sup -1} and the metallicity is [Fe/H] =-0.80 {+-} 0.01. Both of these quantities are lower than the canonical thick disk. We suggest that this ring structure is likely different from the thick disk, though its association with the disk cannot be definitively ruled out. The EBS is detected primarily photometrically, near (l, b) = (225 Degree-Sign , 30 Degree-Sign ), at a distance of 10.9 kpc from the Sun.

Li Jing; Deng Licai; Xu Yan [Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012 (China); Newberg, Heidi Jo; Carlin, Jeffrey L.; Newby, Matthew; Willett, Benjamin A. [Department of Physics, Applied Physics and Astronomy, Rensselaer Polytechnic Institute, Troy, NY 12180 (United States); Luo Zhiquan, E-mail: lijing@bao.ac.cn, E-mail: heidi@rpi.edu [School of Physics and Electronic Information, China West Normal University, Nanchong 637002 (China)

2012-10-01

2

Galactic rings and secular evolution in barred galaxies  

NASA Astrophysics Data System (ADS)

Rings are common in galaxies. Several kinds of rings are known: collisional, polar, and resonance rings, of which the latter is by far most common. Resonance rings are prime tracers of the underlying dynamical structure of disk galaxies, in particular of orbital resonances and of manifolds. Rings are also indicators of angular momentum transport, and this is a key factor in secular evolution (see the various reviews in Falcón-Barroso & Knapen 2012). Resonance rings come in three flavours, primarily defined by their size, namely nuclear, inner, and outer rings. From studies like those of Buta (1995), Knapen (2005) and Comerón et al. (2010, 2013) we know that the radii of nuclear rings range from a few tens of parsec to some 3.5 kpc, while inner rings and outer rings have typical radii of 1.2 and 2.5-3 times the length of the bar. Many host galaxies of rings are barred, but so are most galaxies in general. Some 20% of all rings occur in non-barred galaxies, which implies that rings do not, or hardly, occur preferentially in barred galaxies (Knapen 2005, Comerón et al. 2010, 2013). In most non-barred ringed galaxies an oval, a past interaction, or even a prominent spiral pattern lies at the dynamical origin of the ring, but this needs additional scrutiny. From an inventory of all known nuclear rings, Comerón et al. (2010) reach the following conclusions. Star-forming nuclear rings occur in 20 +/- 2% of disk galaxies with -3 < T < 7; 18/96 occur in disk galaxies without a bar (19%); they are found in S0 to Sd galaxies, peaking in types Sab Sb; when nuclear rings occur in barred galaxies, the ring radius is limited to one quarter of the bar radius; and stronger bars host smaller rings (cf. Knapen 2005). We are now using the Spitzer Survey of Spiral Structure in Galaxies (S4G; Sheth et al. 2010) to expand our survey to inner and outer rings (Comerón et al. 2013). We aim to study the relations between ring and host properties - as we did before for nuclear rings. We will use the S4G sample size and image depth to reach further insight into the secular evolution of galaxies by measuring structural properties of rings, as well as those of components like bars and disks. We will then be able to tackle outstanding questions such as the origin of rings in non-barred galaxies, and how exactly ring properties are determined by the bar.

Knapen, Johan H.

2015-03-01

3

Galactic Recycling: The HI Ring Around NGC 1533  

E-print Network

We report the discovery of a new HI ring around the S0 galaxy NGC 1533. The ring orbits at a radius of 35 kpc, well outside the optical extent of the galaxy. We have conducted N-body/SPH numerical simulations to show this HI ring could be the merger remnant of a tidally destroyed galaxy. We find no optical component associated with the HI ring. However, observations hint at H-alpha emission associated with the SE part of the ring only. The H-alpha is in the form of a few very small isolated emission line regions. The large HI velocity dispersions (up to 30 km/s) and velocity gradients (up to 50 km/s/kpc) in this region indicate the H-alpha emission could be due to star formation triggered by clouds colliding within the ring.

Emma Ryan-Weber; Rachel Webster; Kenji Bekki

2002-09-17

4

Galactic ring nebulae associated with Wolf-Rayet stars. IV - The ring nebula S308 and its interstellar environment  

NASA Astrophysics Data System (ADS)

Narrow-band filter photographs, O III 5007 A Fabry-Perot forbidden line profiles, and 21-cm maps of the vicinity of the Sharpless H II region S308 and adjacent nebulae have been obtained. S308 is a ring nebula surrounding the WN5 star HD 50896. An expansion velocity of 60 km/sec, and an age of 70,000 years, are derived for S308. The total kinetic energy and thermal energy in the shell of S308 can account for only 5 percent of the total stellar wind energy input. The H II regions S303 and S304 exterior to S308 are also excited by the star HD 50896, showing that S308 is optically thin to UV photons.

Chu, Y.-H.; Troland, T. H.; Gull, T. R.; Treffers, R. R.; Kwitter, K. B.

1982-03-01

5

A Deep View of the Monoceros Ring in the Anticenter Direction: Clues of Its Extra-galactic Origin  

NASA Astrophysics Data System (ADS)

We present the results of deep imaging obtained at the Canada-France-Hawaii Telescope with MegaCam in the anticenter direction at two different heights above the Galactic disk. We detect the presence of the Monoceros ring in both fields as a conspicuous and narrow main-sequence feature which dominates star counts over a large portion of the color-magnitude diagram down to g' ~ 24. The comparison of the morphology and density of this feature with a large variety of Galactic models excludes the possibility that it can be due to a flare of the Galactic disk, supporting an extra-Galactic origin for this ring-like structure.

Sollima, A.; Valls-Gabaud, D.; Martinez-Delgado, D.; Fliri, J.; Peñarrubia, J.; Hoekstra, H.

2011-03-01

6

Storage Rings in the Sky: Gamma Ray Bursts and Galactic Gravitational Collapse Stored Energy  

NASA Astrophysics Data System (ADS)

The recent discovery of almost 100% polarization of the prompt gamma ray emission from GRB021206, (1), confirms my 44 year old ``Strong" Magnetic Field" model (SMF) for galactic dynamics. In SMF, Storage Ring particles were accelerated long ago during the original gravitational collapse of the pregalactic/prequasar plasma cloud that is permeated by an almost uniform primordial magnetic field (2,3) The enormous, intense, slender, relativistic, stable, completely coherent Storage Ring stores a very small fraction of the huge galactic gravitational collapse energy in an almost radiationless state, unless disturbed. The concept of an Astrophysical Storage Ring was introduced by me in l961. At first it was to explain galactic structure, but soon it proved useful to explain active galactic nuclei (AGN) and the dynamics of quasar/AGN jets. AGN and galactic morphology, energetics and dynamics vary as the ratio of magnetic energy to rotational energy in the particular object. Gamma ray bursts (GRB) are due simply to a ``rock". i.e. a white dwarf, ordinary star, neutron sstar, asteroid, planet, etc. falling rapidly through the Storage Ring and being almost instantly vaporized into a hot plasma fireball, causing an electromagnetic shower (2) Then the fireball speeds into the huge organized magnetic field surrounding the current ring, thus generating very highly polarized prompt gamma ray emission (as seen in GRB021206) from the synchrotron radiation process. The timing fits the GRB observations nicely. For instance, a ``rock" racing at 1000 kilometers per second across a 20,000 km. path in the beam would produce a twenty second burst. Other times, a target might track across a short chord for a short burst. Space missions have shown that often typical currents in space plasmas are made up of slender filaments. Thus the puzzling less than one millisecond spikes observed in some GRB are simply describing the structure of that particular ring current at that particular time. 1. W. Coburn and S.E. Boggs, Nature, 423, 415, (2003) 2. H. D. Greyber in a book, After the Dark Ages: When Galaxies Were Young, eds. S.S. Holt and E. P. Smith, AIP Conference Proceedings 470, 388-396. (1998) 3. H. D. Greyber in a Space Telescope Science Institute Report: Poster Papers from their 2001 Spring Symposium, ``The Dark Universe: Matter, Energy and Gravity," ed. Mario Livio, published March 2003, (34-39)

Greyber, H. D.

2004-05-01

7

A 100 pc ELLIPTICAL AND TWISTED RING OF COLD AND DENSE MOLECULAR CLOUDS REVEALED BY HERSCHEL AROUND THE GALACTIC CENTER  

SciTech Connect

Thermal images of cold dust in the Central Molecular Zone of the Milky Way, obtained with the far-infrared cameras on board the Herschel satellite, reveal a {approx}3 x 10{sup 7} M{sub sun} ring of dense and cold clouds orbiting the Galactic center. Using a simple toy model, an elliptical shape having semi-major axes of 100 and 60 pc is deduced. The major axis of this 100 pc ring is inclined by about 40{sup 0} with respect to the plane of the sky and is oriented perpendicular to the major axes of the Galactic Bar. The 100 pc ring appears to trace the system of stable x{sub 2} orbits predicted for the barred Galactic potential. Sgr A* is displaced with respect to the geometrical center of symmetry of the ring. The ring is twisted and its morphology suggests a flattening ratio of 2 for the Galactic potential, which is in good agreement with the bulge flattening ratio derived from the 2MASS data.

Molinari, S.; Di Giorgio, A. M.; Elia, D.; Pestalozzi, M.; Pezzuto, S. [INAF-Istituto Fisica Spazio Interplanetario, Via Fosso del Cavaliere 100, I-00133 Roma (Italy); Bally, J. [Center for Astrophysics and Space Astronomy, University of Colorado, Boulder, CO 80309 (United States); Noriega-Crespo, A.; Compiegne, M. [Spitzer Science Center, California Institute of Technology, 1200 E. California Bl., Pasadena, CA 91125 (United States); Bernard, J. P.; Paradis, D. [CNRS, IRAP, 9 Av. colonel Roche, BP 44346, F-31028 Toulouse cedex 4 (France); Martin, P. [Department of Astronomy and Astrophysics, University of Toronto (Canada); Testi, L. [European Southern Observatory, Karl Schwarzschild Str. 2, 85748 Garching (Germany); Barlow, M.; Swinyard, B. [Department of Physics and Astronomy, University College London, London (United Kingdom); Moore, T. [Astrophysics Research Institute, Liverpool John Moores University (United Kingdom); Plume, R. [Department of Physics and Astronomy, University of Calgary (Canada); Zavagno, A. [LAM, Universite de Provence, Marseille (France); Calzoletti, L.; Faustini, F.; Natoli, P. [Agenzia Spaziale Italiana (ASI) Science Data Center, I-00044 Frascati, Roma (Italy)

2011-07-10

8

Molecular Clouds and Clumps in the Boston University-Five College Radio Astronomy Observatory Galactic Ring Survey  

NASA Astrophysics Data System (ADS)

The Boston University-Five College Radio Astronomy Observatory (BU-FCRAO) Galactic Ring Survey (GRS) of 13CO J = 1 ? 0 emission covers Galactic longitudes 18° < ell < 55fdg7 and Galactic latitudes |b| <= 1°. Using the SEQUOIA array on the FCRAO 14 m telescope, the GRS fully sampled the 13CO Galactic emission (46'' angular resolution on a 22'' grid) and achieved a spectral resolution of 0.21 km s-1. Because the GRS uses 13CO, an optically thin tracer, rather than 12CO, an optically thick tracer, the GRS allows a much better determination of column density and also a cleaner separation of velocity components along a line of sight. With this homogeneous, fully sampled survey of 13CO emission, we have identified 829 molecular clouds and 6124 clumps throughout the inner Galaxy using the CLUMPFIND algorithm. Here we present details of the catalog and a preliminary analysis of the properties of the molecular clouds and their clumps. Moreover, we compare clouds inside and outside of the 5 kpc ring and find that clouds within the ring typically have warmer temperatures, higher column densities, larger areas, and more clumps compared with clouds located outside the ring. This is expected if these clouds are actively forming stars. This catalog provides a useful tool for the study of molecular clouds and their embedded young stellar objects.

Rathborne, J. M.; Johnson, A. M.; Jackson, J. M.; Shah, R. Y.; Simon, R.

2009-05-01

9

SOFIA/FORCAST IMAGING OF THE CIRCUMNUCLEAR RING AT THE GALACTIC CENTER  

SciTech Connect

We present 19.7, 31.5, and 37.1 ?m images of the inner 6 pc of the Galactic center of the Milky Way with a spatial resolution of 3.''2-4.''6 taken by the Faint Object Infrared Camera on the Stratospheric Observatory for Infrared Astronomy. The images reveal in detail the 'clumpy' structure of the circumnuclear ring (CNR)—the inner edge of the molecular torus orbiting the supermassive black hole at the Galactic center—and the prominent streamers of hot, ionized gas and dust within the CNR that compose the H II region Sgr A West. The CNR exhibits features of a classic H II region: the dust emission at 19.7 ?m closely traces the ionized gas emission observed in the radio while the 31.5 and 37.1 ?m emission traces the photo-dissociation region beyond the ionized gas. The 19.7/37.1 color temperature map reveals a radial temperature gradient across the CNR with temperatures ranging from 65 to 85 K, consistent with the prevailing paradigm in which the dust is centrally heated by the inner cluster of hot, young stars. We model the 37.1 ?m intensity of the CNR as an inclined (?{sub i} = 67°) ring with a thickness and radius of 0.34 pc and 1.4 pc, respectively, and find that it is consistent with the observed 37.1 ?m map of the CNR. The 37.1 ?m optical depth map also reveals the clumpy dust distribution of the CNR and implies a total gas mass of ?610 M{sub ?}. Dense (5-9 × 10{sup 4} cm{sup –3}) clumps with an FWHM of ?0.15 pc exist along the inner edge of the CNR and shadow the material deeper into the ring. We find that the clumps are unlikely to be long-lived structures since they are not dense enough to be stable against tidal shear from the supermassive black hole and will be sheared out on a timescale of an orbital period (?10{sup 5} yr)

Lau, R. M.; Herter, T. L.; Adams, J. D. [Astronomy Department, 202 Space Sciences Building, Cornell University, Ithaca, NY 14853-6801 (United States); Morris, M. R.; Becklin, E. E. [Department of Physics and Astronomy, University of California, Los Angeles, 430 Portola Plaza, Los Angeles, CA 90095-1547 (United States)

2013-09-20

10

SUBMILLIMETER AND MOLECULAR VIEWS OF THREE GALACTIC RING-LIKE H II REGIONS  

SciTech Connect

We use SCUBA 850 {mu}m and CO observations to analyze the surroundings of three Galactic ring-like H II regions, KR 7, KR 81, and KR 120 (Sh 2-124, Sh 2-165, and Sh 2-187), with the aim of finding sites of triggered star formation. We find one prominent submillimeter (sub-mm) source for each region, located at the interface between the H II region and its neutral surroundings. Using Two Micron All Sky Survey photometry, we find that the prominent sub-mm source for KR 120 probably contains an embedded cluster of young stellar objects (YSOs), making it a likely site for triggered star formation. The KR 7 sub-mm source could possibly contain embedded YSOs, while the KR 81 sub-mm source likely does not. The mass column densities for these dominant sub-mm sources fall in the {approx}0.1-0.6 g cm{sup -2} range. The mass of the cold, dense material (clumps) seen as the three dominant sub-mm sources falls around {approx}100 M{sub sun}. We use the SCUBA Legacy catalog to characterize the populations of sub-mm sources around the H II regions, and compare them to the sources found around a previously studied similar ring-like H II region (KR 140) and near a massive star-forming region (W3). Finally, we estimate the IR luminosities of the prominent newly detected sub-mm sources and find that they are correlated with the clump mass, consistent with a previously known luminosity-mass relationship which this study shows to be valid over four orders of magnitude in mass.

Arvidsson, K. [Astronomy Department, Adler Planetarium, 1300 South Lake Shore Drive, Chicago, IL 60605 (United States); Kerton, C. R., E-mail: karvidsson@adlerplanetarium.org, E-mail: kerton@iastate.edu [Department of Physics and Astronomy, Iowa State University, Ames, IA 50011 (United States)

2011-05-15

11

Structure formation in gas-rich galactic discs with finite thickness: from discs to rings  

NASA Astrophysics Data System (ADS)

Gravitational instabilities play an important role in structure formation of gas-rich high-redshift disc galaxies. In this paper, we revisit the axisymmetric perturbation theory and the resulting growth of structure by taking the realistic thickness of the disc into account. In the unstable regime, which corresponds for thick discs to a Toomre parameter below the critical value Q0, crit = 0.696, we find a fastest growing perturbation wavelength that is always a factor 1.93 times larger than in the classical razor-thin disc approximation. This result is independent of the adopted disc scaleheight and by this independent of temperature and surface density. In order to test the analytical theory, we compare it with a high-resolution hydrodynamical simulation of an isothermal gravitationally unstable gas disc with the typical vertical sech2 density profile and study its break up into rings that subsequently fragment into dense clumps. In the first phase, rings form, that organize themselves discretely, with distances corresponding to the local fastest growing perturbation wavelength. We find that the disc scaleheight has to be resolved initially with five or more grid cells in order to guarantee proper growth of the ring structures, which follow the analytical prediction. These rings later on contract to a thin and dense line, while at the same time accreting more gas from the inter-ring region. It is these dense, circular filaments, that subsequently fragment into a large number of clumps. Contrary to what is typically assumed, the clump sizes are therefore not directly determined by the fastest growing wavelength.

Behrendt, M.; Burkert, A.; Schartmann, M.

2015-03-01

12

Galactic Twins of the Ring Nebula Around SN1987A and a Possible LBV-like Phase for Sk-69 202  

E-print Network

Some core-collapse supernovae show clear signs of interaction with dense circumstellar material that often appears to be non-spherical. Circumstellar nebulae around supernova progenitors provide clues to the origin of that asymmetry in immediate pre-supernova evolution. Here I discuss outstanding questions about the formation of the ring nebula around SN1987A and some implications of similar ring nebulae around Galactic B supergiants. Several clues hint that SN1987A's nebula may have been ejected in an LBV-like event, rather than through interacting winds in a transition from a red supergiant to a blue supergiant.

Nathan Smith

2007-05-21

13

Rings  

NASA Astrophysics Data System (ADS)

Rings recounts one of the most fascinating stories to emerge from our recent exploration of the solar system. In the past decade scientists have learned more about this beautiful astronomical phenomenon than was ever known before. James Elliot played a leading role in the scientific group that discovered the rings of Uranus, and Richard Kerr has covered Voyager's encounters with Jupiter, Saturn, and Uranus for Science magazine. Together they capture the excitement of the new discoveries - the first since Galileo observed Saturn's rings in 1610 - while showing the central role serendipity can play in scientific progress. James Elliot is Professor of Astronomy and Physics at MIT and Director of the George R. Wallace, Jr., Astrophysical Observatory. Richard Kerr is a senior writer on the research news staff of Science magazine. Copies of the tape that recorded the discovery of the Uranian rings are available from The MIT Press.

Elliot, James; Kerr, Richard

1987-04-01

14

THE TURBULENCE SPECTRUM OF MOLECULAR CLOUDS IN THE GALACTIC RING SURVEY: A DENSITY-DEPENDENT PRINCIPAL COMPONENT ANALYSIS CALIBRATION  

SciTech Connect

Turbulence plays a major role in the formation and evolution of molecular clouds. Observationally, turbulent velocities are convolved with the density of an observed region. To correct for this convolution, we investigate the relation between the turbulence spectrum of model clouds, and the statistics of their synthetic observations obtained from principal component analysis (PCA). We apply PCA to spectral maps generated from simulated density and velocity fields, obtained from hydrodynamic simulations of supersonic turbulence, and from fractional Brownian motion (fBm) fields with varying velocity, density spectra, and density dispersion. We examine the dependence of the slope of the PCA pseudo-structure function, {alpha}{sub PCA}, on intermittency, on the turbulence velocity ({beta}{sub v}) and density ({beta}{sub n}) spectral indexes, and on density dispersion. We find that PCA is insensitive to {beta}{sub n} and to the log-density dispersion {sigma}{sub s}, provided {sigma}{sub s} {<=} 2. For {sigma}{sub s} > 2, {alpha}{sub PCA} increases with {sigma}{sub s} due to the intermittent sampling of the velocity field by the density field. The PCA calibration also depends on intermittency. We derive a PCA calibration based on fBm structures with {sigma}{sub s} {<=} 2 and apply it to 367 {sup 13}CO spectral maps of molecular clouds in the Galactic Ring Survey. The average slope of the PCA structure function, ({alpha}{sub PCA}) = 0.62 {+-} 0.2, is consistent with the hydrodynamic simulations and leads to a turbulence velocity exponent of ({beta}{sub v}) = 2.06 {+-} 0.6 for a non-intermittent, low density dispersion flow. Accounting for intermittency and density dispersion, the coincidence between the PCA slope of the GRS clouds and the hydrodynamic simulations suggests {beta}{sub v} {approx_equal} 1.9, consistent with both Burgers and compressible intermittent turbulence.

Roman-Duval, Julia; Jackson, James [Institute for Astrophysical Research at Boston University, 725 Commonwealth Avenue, Boston, MA 02215 (United States); Federrath, Christoph; Klessen, Ralf S. [Zentrum fuer Astronomie der Universitaet Heidelberg, Institut fuer Theoretische Astrophysik, Albert-Ueberle-Str. 2, D-69120 Heidelberg (Germany); Brunt, Christopher [School of Physics, University of Exeter, Stocker Road, Exeter EX4 4QL (United Kingdom); Heyer, Mark, E-mail: jduval@bu.edu, E-mail: jackson@bu.edu, E-mail: duval@stsci.edu, E-mail: chfeder@uni-heidelberg.de, E-mail: klessen@uni-heidelberg.de, E-mail: heyer@astro.umass.edu [Department of Astronomy, University of Massachusetts, Amherst, MA 01003-9305 (United States)

2011-10-20

15

Exterior view looking down through the approximate centerline of the ...  

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

Exterior view looking down through the approximate centerline of the upper hatch and docking ring on the external airlock on the Orbiter Discovery. This photograph was take in the Orbiter Processing Facility at the Kennedy Space Center. - Space Transportation System, Orbiter Discovery (OV-103), Lyndon B. Johnson Space Center, 2101 NASA Parkway, Houston, Harris County, TX

16

Sunshade for building exteriors  

DOEpatents

A sunshade for shading window exteriors includes at least one connecting bracket for attachment to a window mullion, a blade support strut attached to the connecting bracket at a first joint, and a plurality of louvered blades supported by the blade support strut at a second joint. The pivot angle at the first joint may be varied to extend the louvered blades a desired distance from the window mullion. The louvered blades are positioned at a preselected fixed profile angle on the second joint in order to optimize shading at the latitude where the sunshade is installed. In a preferred embodiment, the louvered blades have top walls supporting photovoltaic cells and the sunshade includes electric cables for connecting the photovoltaic cells to an electric circuit.

Braunstein, Richard (Atlanta, GA); McKenna, Gregory B. (Cumming, GA); Hewitt, David W. (Alpharetta, GA); Harper, Randolph S. (Keezletown, VA)

2002-01-01

17

1. VIEW LOOKING SOUTHEAST AT EXTERIOR OF 8FOOT TRANSONIC PRESSURE ...  

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

1. VIEW LOOKING SOUTHEAST AT EXTERIOR OF 8-FOOT TRANSONIC PRESSURE TUNNEL. NOTE EXPANSION RINGS. - NASA Langley Research Center, 8-Foot Transonic Pressure Tunnel, 640 Thornell Avenue, Hampton, Hampton, VA

18

Exterior dimension of fat fractals  

NASA Technical Reports Server (NTRS)

Geometric scaling properties of fat fractal sets (fractals with finite volume) are discussed and characterized via the introduction of a new dimension-like quantity which is called the exterior dimension. In addition, it is shown that the exterior dimension is related to the 'uncertainty exponent' previously used in studies of fractal basin boundaries, and it is shown how this connection can be exploited to determine the exterior dimension. Three illustrative applications are described, two in nonlinear dynamics and one dealing with blood flow in the body. Possible relevance to porous materials and ballistic driven aggregation is also noted.

Grebogi, C.; Mcdonald, S. W.; Ott, E.; Yorke, J. A.

1985-01-01

19

75 FR 34170 - Plastic Omnium Automotive Exteriors, LLC, Anderson, SC; Plastic Omnium Automotive Exteriors, LLC...  

Federal Register 2010, 2011, 2012, 2013, 2014

...TA-W-73,230; TA-W-73,230A] Plastic Omnium Automotive Exteriors, LLC, Anderson, SC; Plastic Omnium Automotive Exteriors, LLC, Troy...March 18, 2010, applicable to workers of Plastic Omnium Automotive Exteriors, LLC,...

2010-06-16

20

Theory of the X-ray emission of the extended galactic source Monogem Ring in the constellation Monoceros  

SciTech Connect

A study is made of the X-ray emission of the source Monogem Ring, for which a possible generation mechanism is thermal bremsstrahlung of hot gas filling the interior of a spherical shock wave produced by a supernova explosion. An analytic expression is obtained for the X-ray spectra for this generation mechanism in the cases when the undisturbed interstellar gas surrounding the supernova before the explosion has a constant uniform density distribution and a density distribution in accordance with a power law. The calculated spectra are compared with the observational data, and good agreement is obtained in both cases. 14 references.

Krol, V.A.

1984-01-01

21

A Study of Galactic Ring-Shaped HII Regions: Searching For Possible Sites of Triggered Star Formation  

NASA Astrophysics Data System (ADS)

We report the results of a study of star-formation activity associated with the outer Galaxy ring-shaped HII regions KR7, KR81, KR120 and KR140, using archival Spitzer and WISE data along with deep JHK observations from CFHT. We used CO data cubes from the Five College Radio Astronomy Observatory to define extent of the molecular cloud associated each HII region. Using the infrared data sets, we identified and classified YSO populations within each molecular cloud using measures such as the class I/II ratio and YSO spatial density. Combining our observations of the YSO population distribution with time scales associated with YSO evolution and HII region expansion, we investigated the possible significance of triggered star formation in the molecular cloud surrounding each region.

Kang, Sung-Ju; Kerton, Charles R.

2015-01-01

22

Heegaard splittings of knot exteriors  

Microsoft Academic Search

The goal of this paper is to offer a comprehensive exposition of the current knowledge about Heegaard splittings of exteriors of knots in the 3-sphere. The exposition is done with a historical perspective as to how ideas developed and by whom. Several new notions are introduced and some facts about them are proved. In particular the concept of a 1\\/n-primitive

Yoav Moriah

2006-01-01

23

Stable gravastars with generalised exteriors  

E-print Network

New spherically symmetric gravastar solutions, stable to radial perturbations, are found by utilising the construction of Visser and Wiltshire. The solutions possess an anti--de Sitter or de Sitter interior and a Schwarzschild--(anti)--de Sitter or Reissner--Nordstr\\"{o}m exterior. We find a wide range of parameters which allow stable gravastar solutions, and present the different qualitative behaviours of the equation of state for these parameters.

Benedict M. N. Carter

2005-09-22

24

Boundary and Exterior of a Multiset Topology  

E-print Network

The concepts of exterior and boundary in multiset topological space are introduced. We further established few relationships between the concepts of boundary, closure, exterior and interior of an M- set. These concepts have been pigeonholed by other existing notions viz., open sets, closed sets, clopen sets and limit points. The necessary and sufficient condition for a multiset to have an empty exterior is also discussed.

J. Mahanta; D. Das

2015-01-26

25

Differential complexes and exterior calculus  

E-print Network

In this paper we present a new theory of calculus over $k$-dimensional domains in a smooth $n$-manifold, unifying the discrete, exterior, and continuum theories. The calculus begins at a single point and is extended to chains of finitely many points by linearity, or superposition. It converges to the smooth continuum with respect to a norm on the space of ``pointed chains,'' culminating in the chainlet complex. Through this complex, we discover a broad theory of coordinate free, multivector analysis in smooth manifolds for which both the classical Newtonian calculus and the Cartan exterior calculus become special cases. The chainlet operators, products and integrals apply to both symmetric and antisymmetric tensor cochains. As corollaries, we obtain the full calculus on Euclidean space, cell complexes, bilayer structures (e.g., soap films) and nonsmooth domains, with equal ease. The power comes from the recently discovered prederivative and preintegral that are antecedent to the Newtonian theory. These lead to new models for the continuum of space and time, and permit analysis of domains that may not be locally Euclidean, or locally connected, or with locally finite mass.

Jenny Harrison

2006-06-07

26

Finite element exterior calculus, homological techniques,  

E-print Network

Finite element exterior calculus, homological techniques, and applications to elasticity Seminar WS developed Finite Element Exterior Calculus, which brings together ideas and techniques from finite element view makes an entire zoo of finite elements more accessible and leads to a deeper mathematical

Wardetzky, Max

27

Planetary Rings  

NASA Astrophysics Data System (ADS)

A revolution in the studies in planetary rings studies occurred in the period 1977--1981, with the serendipitous discovery of the narrow, dark rings of Uranus, the first Voyager images of the tenuous jovian ring system, and the many spectacular images returned during the twin Voyager flybys of Saturn. In subsequent years, ground-based stellar occultations, HST observations, and the Voyager flybys of Uranus (1986) and Neptune (1989), as well as a handful of Galileo images, provided much additional information. Along with the completely unsuspected wealth of detail these observations revealed came an unwelcome problem: are the rings ancient or are we privileged to live at a special time in history? The answer to this still-vexing question may lie in the complex gravitational interactions recent studies have revealed between the rings and their retinues of attendant satellites. Among the four known ring systems, we see elegant examples of Lindblad and corotation resonances (first invoked in the context of galactic disks), electromagnetic resonances, spiral density waves and bending waves, narrow ringlets which exhibit internal modes due to collective instabilities, sharp-edged gaps maintained via tidal torques from embedded moonlets, and tenuous dust belts created by meteoroid impact onto parent bodies. Perhaps most puzzling is Saturn's multi-stranded, clumpy F ring, which continues to defy a simple explanation 20 years after it was first glimpsed in grainy images taken by Pioneer 11. Voyager and HST images reveal a complex, probably chaotic, dynamical interaction between unseen parent bodies within this ring and its two shepherd satellites, Pandora and Prometheus. The work described here reflects contributions by Joe Burns, Jeff Cuzzi, Luke Dones, Dick French, Peter Goldreich, Colleen McGhee, Carolyn Porco, Mark Showalter, and Bruno Sicardy, as well as those of the author. This research has been supported by NASA's Planetary Geology and Geophysics program and the Space Telescope Science Institute.

Nicholson, P. D.

2001-11-01

28

The caustic ring singularity  

E-print Network

I investigate the caustics produced by the fall of collisionless dark matter in and out of a galaxy in the limit of negligible velocity dispersion. The outer caustics are spherical shells enveloping the galaxy. The inner caustics are rings. These are located near where the particles with the most angular momentum are at their distance of closest approach to the galactic center. The surface of a caustic ring is a closed tube whose cross-section is a $D_{-4}$ catastrophe. It has three cusps amongst which exists a discrete $Z_3$ symmetry. A detailed analysis is given in the limit where the flow of particles is axially and reflection symmetric and where the transverse dimensions of the ring are small compared to the ring radius. Five parameters describe the caustic in that limit. The relations between these parameters and the initial velocity distribution of the particles are derived. The structure of the caustic ring is used to predict the shape of the bump produced in a galactic rotation curve by a caustic ring lying in the galactic plane.

P. Sikivie

1999-05-14

29

Yale University Campus Signage exterior sign system  

E-print Network

by the President and Ocers in 2002. Sign installation began in the spring of 2003. objectives A coherentYale University Campus Signage exterior sign system itemization appendix a: interior signs appendix of the University Printer November 2014 #12;blue signs gray signs 2 yale university campus signage contents 3

30

Static exteriors for nonstatic braneworld stars  

E-print Network

We study possible static non-Schwarzschild exteriors for nonstatic spherically symmetric stars in a Randall $&$ Sundrum type II braneworld scenario. Thus, the vacuum region outside the surface of a star is assumed to be a static solution to the equation $^{(4)}R = 0$, where $^{(4)}R $ is the scalar curvature of the 4-dimensional Ricci tensor with spherical symmetry. Firstly, we show that for nonstatic spheres the standard matching conditions are much more restrictive than for static ones; they lead to a specific requirement on the vacuum region outside of a nonstatic star, that is absent in the case of static stars. Secondly, without making any assumption about the bulk, or the material medium inside the star, we prove the following theorem on the brane: for {\\it any} nonstatic spherical star, without rotation, there are only two possible static exteriors; these are the Schwarzschild and the "Reissner-Nordstr{\\"o}m-like" exteriors. This is quite distinct from the case of stars in hydrostatic equilibrium which admit a much larger family of non-Schwarzschild static exteriors.

J. Ponce de Leon

2008-03-04

31

Evaluation of commercially available exterior digital VMDs  

SciTech Connect

This report discusses the testing and evaluation of thirteen commercially available exterior digital video motion detection (VMD) systems. The systems were evaluated for use in a specific outdoor application. The report focuses primarily on the testing parameters, each system`s advertised features, and the nuisance alarm and detection test results.

Ringler, C.E.; Hoover, C.E.

1995-06-01

32

Planetary Rings  

NASA Astrophysics Data System (ADS)

Preface: a personal view of planetary rings; 1. Introduction: the allure of the ringed planets; 2. Studies of planetary rings 1610-2013; 3. Diversity of planetary rings; 4. Individual ring particles and their collisions; 5. Large-scale ring evolution; 6. Moons confine and sculpt rings; 7. Explaining ring phenomena; 8. N-body simulations; 9. Stochastic models; 10. Age and evolution of rings; 11. Saturn's mysterious F ring; 12. Uranus' rings and moons; 13. Neptune's partial rings; 14. Jupiter's ring-moon system after Galileo and New Horizons; 15. Ring photometry; 16. Dusty rings; 17. Concluding remarks; Afterword; Glossary; References; Index.

Esposito, Larry

2014-03-01

33

Exterior view of north and east exterior walls of LongTerm ...  

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

Exterior view of north and east exterior walls of Long-Term Oxidizer Silo (T-28B), looking south. Silo was designed to assess long-term environmental impacts on storage of the Titan II's oxidizer (nitrogen tetroxide). The shorter Oxidizer Conditioning Structure (T-28D) is located behind and to the immediate left of T-28B - Air Force Plant PJKS, Systems Integration Laboratory, Long-Term Oxidizer Silo, Waterton Canyon Road & Colorado Highway 121, Lakewood, Jefferson County, CO

34

Spectral methods for exterior elliptic problems  

NASA Technical Reports Server (NTRS)

Spectral approximations for exterior elliptic problems in two dimensions are discussed. As in the conventional finite difference or finite element methods, the accuracy of the numerical solutions is limited by the order of the numerical farfield conditions. A spectral boundary treatment is introduced at infinity which is compatible with the infinite order interior spectral scheme. Computational results are presented to demonstrate the spectral accuracy attainable. Although a simple Laplace problem is examined, the analysis covers more complex and general cases.

Canuto, C.; Hariharan, S. I.; Lustman, L.

1984-01-01

35

Excavationless Exterior Foundation Insulation Exploratory Study  

SciTech Connect

The key objective of this exploratory study was to investigate the feasibility of the development or adoption of technologies that would enable a large percentage of existing homes in cold climates to apply a combination 'excavationless' soil removal process with appropriate insulation and water management on the exterior of existing foundations at a low cost. Our approach was to explore existing excavation and material technologies and systems to discover whether potential successful combinations existed.

Mosiman, G.; Wagner, R.; Schirber, T.

2013-02-01

36

Excavationless Exterior Foundation Insulation Field Study  

SciTech Connect

Building science research supports installing exterior (soil side) foundation insulation as the optimal method to enhance the hygrothermal performance of new homes. With exterior foundation insulation, water management strategies are maximized while insulating the basement space and ensuring a more even temperature at the foundation wall. However, such an approach can be very costly and disruptive when applied to an existing home, requiring deep excavation around the entire house. The NorthernSTAR Building America Partnership team implemented an innovative, minimally invasive foundation insulation upgrade technique on an existing home. The approach consisted of using hydrovac excavation technology combined with a liquid insulating foam. The team was able to excavate a continuous 4" wide by 4' to 5' deep trench around the entire house, 128 linear feet, except for one small part under the stoop that was obstructed with concrete debris. The combination pressure washer and vacuum extraction technology also enabled the elimination of large trenches and soil stockpiles normally produced by backhoe excavation. The resulting trench was filled with liquid insulating foam, which also served as a water-control layer of the assembly. The insulation was brought above grade using a liquid foam/rigid foam hybrid system and terminated at the top of the rim joist. Cost savings over the traditional excavation process ranged from 23% to 50%. The excavationless process could result in even greater savings since replacement of building structures, exterior features, utility meters, and landscaping would be minimal or non-existent in an excavationless process.

Schirber, T.; Mosiman, G.; Ojczyk, C.

2014-10-01

37

Inverse scattering for an exterior Dirichlet program  

NASA Technical Reports Server (NTRS)

Scattering due to a metallic cylinder which is in the field of a wire carrying a periodic current is considered. The location and shape of the cylinder is obtained with a far field measurement in between the wire and the cylinder. The same analysis is applicable in acoustics in the situation that the cylinder is a soft wall body and the wire is a line source. The associated direct problem in this situation is an exterior Dirichlet problem for the Helmholtz equation in two dimensions. An improved low frequency estimate for the solution of this problem using integral equation methods is presented. The far field measurements are related to the solutions of boundary integral equations in the low frequency situation. These solutions are expressed in terms of mapping function which maps the exterior of the unknown curve onto the exterior of a unit disk. The coefficients of the Laurent expansion of the conformal transformations are related to the far field coefficients. The first far field coefficient leads to the calculation of the distance between the source and the cylinder.

Hariharan, S. I.

1981-01-01

38

Transformation elastodynamics and active exterior acoustic cloaking  

E-print Network

This chapter consists of three parts. In the first part we recall the elastodynamic equations under coordinate transformations. The idea is to use coordinate transformations to manipulate waves propagating in an elastic material. Then we study the effect of transformations on a mass-spring network model. The transformed networks can be realized with "torque springs", which are introduced here and are springs with a force proportional to the displacement in a direction other than the direction of the spring terminals. Possible homogenizations of the transformed networks are presented, with potential applications to cloaking. In the second and third parts we present cloaking methods that are based on cancelling an incident field using active devices which are exterior to the cloaked region and that do not generate significant fields far away from the devices. In the second part, the exterior cloaking problem for the Laplace equation is reformulated as the problem of polynomial approximation of analytic functions. An explicit solution is given that allows to cloak larger objects at a fixed distance from the cloaking device, compared to previous explicit solutions. In the third part we consider the active exterior cloaking problem for the Helmholtz equation in 3D. Our method uses the Green's formula and an addition theorem for spherical outgoing waves to design devices that mimic the effect of the single and double layer potentials in Green's formula.

Fernando Guevara Vasquez; Graeme W. Milton; Daniel Onofrei; Pierre Seppecher

2011-05-06

39

Planetary Rings  

NASA Astrophysics Data System (ADS)

Preface; 1. Introduction: the allure of ringed planets; 2. Studies of planetary rings 1610-2004; 3. Diversity of planetary rings; 4. Individual ring particles and their collisions; 5. Large-scale ring evolution; 6. Moons confine and sculpt rings; 7. Explaining ring phenomena; 8. N-Body simulations; 9. Stochastic models; 10. Age and evolution of rings; 11. Saturn's mysterious F ring; 12. Neptune's partial rings; 13. Jupiter's ring-moon system after Galileo; 14. Ring photometry; 15. Dusty rings; 16. Cassini observations; 17. Summary: the big questions; Glossary; References; Index.

Esposito, Larry W.

2011-07-01

40

Mon. Not. R. Astron. Soc. 418, 25082518 (2011) doi:10.1111/j.1365-2966.2011.19641.x A two-component outer ring and Galactic spiral structure  

E-print Network

be observed even in distant parts of the Galactic disc. Heliocentric distances r for faraway H II regions (r, VLSR), where l is the Galactic longi- tude and VLSR the heliocentric line-of-sight velocity Vr

Mel'nik, Anna

2011-01-01

41

Design of an autonomous exterior security robot  

NASA Technical Reports Server (NTRS)

This paper discusses the requirements and preliminary design of robotic vehicle designed for performing autonomous exterior perimeter security patrols around warehouse areas, ammunition supply depots, and industrial parks for the U.S. Department of Defense. The preliminary design allows for the operation of up to eight vehicles in a six kilometer by six kilometer zone with autonomous navigation and obstacle avoidance. In addition to detection of crawling intruders at 100 meters, the system must perform real-time inventory checking and database comparisons using a microwave tags system.

Myers, Scott D.

1994-01-01

42

Laboratory and exterior durability of high performance acrylic sealants  

SciTech Connect

This paper documents the laboratory and exterior durability of high performance, Class 25 acrylic sealants. Commercial silicone and polyurethane sealants are used as controls. Laboratory durability is evaluated by measuring sealant flexibility, tensile properties and ASTM C920 and ISO 11600 joint movement capabilities. Many of these properties are measured both before and after 2500 hours of Weather-Ometer exposure. Exterior durability is assessed by monitoring 2 to 15 year exterior exposures in moving joints in low rise commercial buildings of brick, aluminum and Exterior Insulation Finishing Systems (EIFS) construction. Both laboratory and exterior durability measurements indicate that high performance Class 25 acrylic sealants have good joint movement capabilities, excellent weatherability and aesthetics, and are generally able to maintain an effective seal to a variety of substrates after extended exterior exposure. They perform and test in a manner similar to other Class 25 sealants of alternative chemistries.

Demarest, V.A.; Dionne, J.A.; Lertora, M.; Magnotta, J.R. [Rohm and Haas Co., Spring House, PA (United States). Caulk and Sealants Group

1998-12-31

43

Exact vacuum solution to conformal Weyl gravity and galactic rotation curves  

NASA Technical Reports Server (NTRS)

The complete, exact exterior solution for a static, spherically symmetric source in locally conformal invariant Weyl gravity is presented. The solution includes the familiar exterior Schwarzschild solution as a special case and contains an extra gravitational potential term which grows linearly with distance. The obtained solution provides a potential explanation for observed galactic rotation curves without the need for dark matter. The solution also has some interesting implications for cosmology.

Mannheim, Philip D.; Kazanas, Demosthenes

1989-01-01

44

Dark matter axions and caustic rings  

SciTech Connect

This report contains discussions on the following topics: the strong CP problem; dark matter axions; the cavity detector of galactic halo axions; and caustic rings in the density distribution of cold dark matter halos.

Sikivie, P.

1997-11-01

45

Cladding Attachment Over Thick Exterior Insulating Sheathing  

SciTech Connect

The addition of insulation to the exterior of buildings is an effective means of increasing the thermal resistance of both wood framed walls as well as mass masonry wall assemblies. For thick layers of exterior insulation (levels greater than 1.5 inches), the use of wood furring strips attached through the insulation back to the structure has been used by many contractors and designers as a means to provide a convenient cladding attachment location (Straube and Smegal 2009, Pettit 2009, Joyce 2009, Ueno 2010). The research presented in this report is intended to help develop a better understanding of the system mechanics involved and the potential for environmental exposure induced movement between the furring strip and the framing. BSC sought to address the following research questions: 1. What are the relative roles of the mechanisms and the magnitudes of the force that influence the vertical displacement resistance of the system? 2. Can the capacity at a specified deflection be reliably calculated using mechanics based equations? 3. What are the impacts of environmental exposure on the vertical displacement of furring strips attached directly through insulation back to a wood structure?

Baker, P.; Eng, P.; Lepage, R.

2014-01-01

46

EXTERIOR ELEVATION AND OBLIQUE PERSPECTIVE, LOOKING NORTH, WITH DRIVE WHEELS ...  

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

EXTERIOR ELEVATION AND OBLIQUE PERSPECTIVE, LOOKING NORTH, WITH DRIVE WHEELS IN FOREGROUND. - Norfolk & Southern Steam Locomotive No. 1218, Norris Yards, East of Ruffner Road, Irondale, Jefferson County, AL

47

View of exterior circumferential path at northeast side of building ...  

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

View of exterior circumferential path at northeast side of building beneath trellis, looking southeast - National Zoological Park, Bird House, 3001 Connecticut Avenue NW, Washington, District of Columbia, DC

48

1. EXTERIOR OF BUILDING 402, CIVIL ENGINEERING STORAGE, LOOKING SOUTH. ...  

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

1. EXTERIOR OF BUILDING 402, CIVIL ENGINEERING STORAGE, LOOKING SOUTH. - Mill Valley Air Force Station, Civil Engineering Storage, East Ridgecrest Boulevard, Mount Tamalpais, Mill Valley, Marin County, CA

49

Exterior building details of Building B, east façade: ellshaped south ...  

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

Exterior building details of Building B, east façade: ell-shaped south facing concrete staircase with decorative pipe railing, second floor entrance with cement plaster profiled surround, dentil course cornice, truncated embedded wood beams, cream colored plaster-finished exterior façade, closed off window well with protruding vent; northwesterly view - San Quentin State Prison, Building 22, Point San Quentin, San Quentin, Marin County, CA

50

24 CFR 3280.105 - Exit facilities; exterior doors.  

Code of Federal Regulations, 2010 CFR

...inch wide by 72 inch high clear opening. (3) Each swinging exterior door other than screen or storm doors shall have a key-operated lock that...inside. (4) All exterior doors, including storm and screen doors, opening outward shall...

2010-04-01

51

18. DETAIL OF EXTERIOR WALL CONSTRUCTION, VIEW TOWARD EAST, THIRD ...  

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

18. DETAIL OF EXTERIOR WALL CONSTRUCTION, VIEW TOWARD EAST, THIRD BAY Showing furring strips, kraft faced cellulose fiber insulation, and asphalt felt applied to interior of exterior wall studs. - U.S. Military Academy, Ice House, Mills Road at Howze Place, West Point, Orange County, NY

52

Visualizing interior and exterior jet aircraft noise  

NASA Astrophysics Data System (ADS)

In today's competitive aerospace industry, the quest for quiet has drawn significant attention to both the interior and exterior design of an airplane. Understanding the noise generation mechanisms of a jet aircraft is a crucial first step toward developing the most cost-effective noise and vibrations abatement methods. In this investigation, the Helmholtz Equation Least Squares (HELS) based nearfield acoustic holography will be used to understand noise transmission caused by jet engine and turbulence into the fuselage of a jet aircraft cruising at 30,000 ft. Modern propulsive jet engines produce exterior noise sources with a high amplitude noise field and complicated characteristics, which makes them very difficult to characterize. In particular, there are turbulent eddies that are moving through the jet at high speeds along the jet boundary. These turbulent eddies in the shear layer produce a directional and frequency dependent noise. The original HELS approach assumes a spherical source at the origin and computes the acoustic field based on spherical emission from this source. This assumption of one source at the origin is not sufficient to characterize a complex source like a jet. As such, a modified HELS approach is introduced that will help improve the source characterization as it is not dependent on a single source at the origin but a number of virtual sources throughout the space. Custom microphones are created to take acoustic pressure measurements around the jet engine. These measured acoustic pressures are then taken as input to the modified HELS algorithm to visualize the noise pattern of a subsonic jet engine.

Moondra, Manmohan S.

53

Galactic Fountains and Galactic Winds  

E-print Network

The development of galactic fountain theories is reviewed with special emphasis on the different approaches and concepts that have been used in the past. In particular the outstanding contribution of Franz Kahn to our physical understanding is appreciated. It is argued that galactic outflows represent an essential phase during galaxy evolution. The dynamics of the outflow imprints its signature on the emission spectra of soft X-rays, which may well be observable with AXAF and XMM. Finally, some remarks about winds in starburst galaxies and AGN are made.

Dieter Breitschwerdt; Stefanie Komossa

1999-07-31

54

Autonomous navigation for structured exterior environments  

SciTech Connect

The Telemanaged Mobile Security Station (TMSS) was developed at Sandia National Laboratories to investigate the role of mobile robotics in exterior perimeter security systems. A major feature of the system is its capability to perform autonomous patrols of the security site`s network of roads. Perimeter security sites are well known, structured environments; the locations of the roads, buildings, and fences are relatively static. A security robot has the advantage of being able to learn its new environment prior to autonomous travel. The TMSS robot combines information from a microwave beacon system and on-board dead reckoning sensors to determine its location within the site. The operator is required to teleoperate the robot in a teach mode over all desired paths before autonomous operations can commence. During this teach phase, TMSS stores points from its position location system at two meter intervals. This map data base is used for planning paths and for reference during path following. Details of the position location and path following systems will be described along with system performance and recommendations for future enhancements.

Pletta, J B

1993-12-01

55

Vortex rings  

Microsoft Academic Search

The vortex-ring problem in fluid mechanics is examined generally in terms of formation, the steady state, the duration of the rings, and vortex interactions. The formation is studied by examining the generation of laminar and turbulent vortex rings and their resulting structures with attention given to the three stages of laminar ring development. Inviscid dynamics is addressed to show how

Karim Shariff; Anthony Leonard

1992-01-01

56

Galactic Census  

NSDL National Science Digital Library

In this Digital Universe activity, students learn firsthand about estimation strategies and observational bias. They estimate how common several celestial objects are based on their location and make inferences about larger population patterns throughout the galaxy. The printable PDF activity includes illustrated step-by-step instructions for the following hands-on and computer-assisted activities: Introduction to Celestial Objects, Broad Distribution of Objects in the Galaxy and Making Galactic Estimates

57

3. EXTERIOR NORTHEAST CORNER VIEW, FACING SOUTHWEST. BUILDING NO 42 ...  

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

3. EXTERIOR NORTHEAST CORNER VIEW, FACING SOUTHWEST. BUILDING NO 42 GARAGE & TRANSPORTATION MAINTENANCE FACILITY - NASA Industrial Plant, Garage & Transportation Maintenance Facility, 12214 Lakewood Boulevard, Downey, Los Angeles County, CA

58

1. EXTERIOR SOUTHWEST CORNER VIEW, FACING NORTHEAST. BUILDING NO. 42 ...  

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

1. EXTERIOR SOUTHWEST CORNER VIEW, FACING NORTHEAST. BUILDING NO. 42 GARAGE & TRANSPORTATION MAINTENANCE FACILITY - NASA Industrial Plant, Garage & Transportation Maintenance Facility, 12214 Lakewood Boulevard, Downey, Los Angeles County, CA

59

2. EXTERIOR SOUTHEAST CORNER VIEW, FACING NORTHWEST. BUILDING NO 42 ...  

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

2. EXTERIOR SOUTHEAST CORNER VIEW, FACING NORTHWEST. BUILDING NO 42 GARAGE & TRANSPORTATION MAINTENANCE FACILITY - NASA Industrial Plant, Garage & Transportation Maintenance Facility, 12214 Lakewood Boulevard, Downey, Los Angeles County, CA

60

4. EXTERIOR NORTHWEST CORNER VIEW, FACING SOUTHEAST. BUILDING NO 42 ...  

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

4. EXTERIOR NORTHWEST CORNER VIEW, FACING SOUTHEAST. BUILDING NO 42 GARAGE & TRANSPORTATION MAINTENANCE FACILITY - NASA Industrial Plant, Garage & Transportation Maintenance Facility, 12214 Lakewood Boulevard, Downey, Los Angeles County, CA

61

7. EXTERIOR, SIDE VIEW FROM GARDEN SHOWING GRAPE ARBOR undated ...  

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

7. EXTERIOR, SIDE VIEW FROM GARDEN SHOWING GRAPE ARBOR undated - Jean Baptiste Valle House, 99 South Main Street (Northwest corner of Main & Market Streets), Sainte Genevieve, Ste. Genevieve County, MO

62

5. DETAIL EXTERIOR VIEW OF CUPOLA AND WEATHER VANE ON ...  

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

5. DETAIL EXTERIOR VIEW OF CUPOLA AND WEATHER VANE ON TOP OF THE FISH HATCHERY BUILDING. - Bonneville Project, Fish Hatchery, On Columbia River bordered on South by Union Pacific, Bonneville, Multnomah County, OR

63

Exterior oblique view of the east end and the south ...  

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

Exterior oblique view of the east end and the south side. Showing the Dust Collector on the right. View facing northwest - U.S. Naval Base, Pearl Harbor, Sawmill, Seventh Street near Avenue E, Pearl City, Honolulu County, HI

64

DETAIL ELEVATION VIEW OF EXTERIOR STAIRS ON THE EAST END ...  

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

DETAIL ELEVATION VIEW OF EXTERIOR STAIRS ON THE EAST END OF BUILDING 63, FACING SOUTH. - Naval Computer & Telecommunications Area Station, Enlisted Men's Barracks, West corner of Central Street & Midway Drive, Wahiawa, Honolulu County, HI

65

1. EXTERIOR FROM THE SOUTHEAST (view taken 1887; from Title ...  

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

1. EXTERIOR FROM THE SOUTHEAST (view taken 1887; from Title Insurance Company Collection, San Diego Historical Society. Photocopy by Bert Shankland, San Diego, August 20, 1976). - Grand Hotel, 332 F Street, San Diego, San Diego County, CA

66

EXTERIOR VIEW WITH HEART OF DIXIE MUSEUM'S HISTORIC LOCOMOTIVE IN ...  

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

EXTERIOR VIEW WITH HEART OF DIXIE MUSEUM'S HISTORIC LOCOMOTIVE IN MUSEUM'S POWELL AVENUE YARD (BOTTOM) AND SOUTHERN RAILWAY BOXCAR ON ACTIVE TRACKAGE (ABOVE). - Heart of Dixie Railroad, Rolling Stock, 1800 Block Powell Avenue, Birmingham, Jefferson County, AL

67

EXTERIOR ELEVATION, LOOKING SOUTH, ALSO SHOWING THE NORFOLK SOUTHERN STEAM ...  

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

EXTERIOR ELEVATION, LOOKING SOUTH, ALSO SHOWING THE NORFOLK SOUTHERN STEAM RESTORATION FLOOR INTERIOR WITH A DRILL PRESS (LEFT) AND BORING MILL (RIGHT). - Norfolk & Southern Steam Locomotive No. 1218, Norris Yards, East of Ruffner Road, Irondale, Jefferson County, AL

68

Detail of north elevation, third locomotive stall from east, exterior ...  

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

Detail of north elevation, third locomotive stall from east, exterior wall. Shows ventilation system for locomotive stack - East Broad Top Railroad & Coal Company, Roundhouse, State Route 994, West of U.S. Route 522, Rockhill Furnace, Huntingdon County, PA

69

39. EXTERIOR VIEW, BERK SWITCH TOWER, SOUTH NORWALK, SHOWING WEST ...  

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

39. EXTERIOR VIEW, BERK SWITCH TOWER, SOUTH NORWALK, SHOWING WEST FACE AND ENTRANCE STAIRWAY - New York, New Haven & Hartford Railroad, Automatic Signalization System, Long Island Sound shoreline between Stamford & New Haven, Stamford, Fairfield County, CT

70

40. EXTERIOR VIEW, BERK SWITCH TOWER, SOUTH NORWALK, SHOWING FRONT ...  

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

40. EXTERIOR VIEW, BERK SWITCH TOWER, SOUTH NORWALK, SHOWING FRONT ELEVATION AND PIPES LEADING TO SWITCHES - New York, New Haven & Hartford Railroad, Automatic Signalization System, Long Island Sound shoreline between Stamford & New Haven, Stamford, Fairfield County, CT

71

Low-cost exterior insulation process and structure  

DOEpatents

A low-cost exterior insulation process of stacking bags of insulating material against a wall and covering them with wire mesh and stucco provides a durable structure with good insulating value. 2 figs.

Vohra, A.

1999-03-02

72

5. EXTERIOR VIEW TO THE WEST OF THE EAST ELEVATION ...  

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

5. EXTERIOR VIEW TO THE WEST OF THE EAST ELEVATION OF THE TEST CELL, WITH DEWARS IN THE BACKGROUND. - Nevada Test Site, Test Cell C Facility, Building No. 3210, Area 25, Jackass Flats, Road J, Mercury, Nye County, NV

73

5. VIEW OF EXTERIOR FACINGS, SOUTH ELEVATION, ILLUSTRATING RANDOM COURSING ...  

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

5. VIEW OF EXTERIOR FACINGS, SOUTH ELEVATION, ILLUSTRATING RANDOM COURSING THAT USES UNSQUARED, IRREGULAR BASALT STONE WITH SMALLER FRAGMENTS SNECKED INTO THE JOINTING, LOOKING NORTH - Rock Wall, North side of Battle Creek Canyon, Shingletown, Shasta County, CA

74

32. Credit JTL. Exterior transformer bank; note lightning arrestors removed ...  

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

32. Credit JTL. Exterior transformer bank; note lightning arrestors removed from pad and smaller arrestors installed on transformers and in area near air switches. - Dam No. 4 Hydroelectric Plant, Potomac River, Martinsburg, Berkeley County, WV

75

EXTERIOR VIEW OF LOWER LOCK GATES CLOSED. FROM LOCK WALL, ...  

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

EXTERIOR VIEW OF LOWER LOCK GATES CLOSED. FROM LOCK WALL, LOOKING NORTH NORTHWEST. - Illinois Waterway, La Grange Lock and Dam, 3/4 mile south of Country 795N at Illinois River, Versailles, Brown County, IL

76

Exterior building details of Building B, east façade: second floor ...  

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

Exterior building details of Building B, east façade: second floor entrance with cement plaster profiled surround and embedded wood beam end; westerly view - San Quentin State Prison, Building 22, Point San Quentin, San Quentin, Marin County, CA

77

Exterior building details of Building C, east façade: brick quoins, ...  

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

Exterior building details of Building C, east façade: brick quoins, brick lintels, brick window sills, decorative metal grilles, scored cement finished brick wall; westerly view - San Quentin State Prison, Building 22, Point San Quentin, San Quentin, Marin County, CA

78

Exterior, looking west Beale Air Force Base, Perimeter Acquisition ...  

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

Exterior, looking west - Beale Air Force Base, Perimeter Acquisition Vehicle Entry Phased-Array Warning System, Guard Tower, End of Spencer Paul Road, north of Warren Shingle Road (14th Street), Marysville, Yuba County, CA

79

Exterior, looking southwest Beale Air Force Base, Perimeter Acquisition ...  

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

Exterior, looking southwest - Beale Air Force Base, Perimeter Acquisition Vehicle Entry Phased-Array Warning System, Emergency Generator Enclosure, End of Spencer Paul Road, north of Warren Shingle Road (14th Street), Marysville, Yuba County, CA

80

Exterior, detail, showing spiral stair, looking northwest Beale Air ...  

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

Exterior, detail, showing spiral stair, looking northwest - Beale Air Force Base, Perimeter Acquisition Vehicle Entry Phased-Array Warning System, Guard Tower, End of Spencer Paul Road, north of Warren Shingle Road (14th Street), Marysville, Yuba County, CA

81

Exterior, looking north Beale Air Force Base, Perimeter Acquisition ...  

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

Exterior, looking north - Beale Air Force Base, Perimeter Acquisition Vehicle Entry Phased-Array Warning System, Supply Warehouse, End of Spencer Paul Road, north of Warren Shingle Road (14th Street), Marysville, Yuba County, CA

82

122. HISTORIC AMERICAN BUILDINGS SURVEY TEAM MEASURING EXTERIOR OF INDEPENDENCE ...  

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

122. HISTORIC AMERICAN BUILDINGS SURVEY TEAM MEASURING EXTERIOR OF INDEPENDENCE HALL (LEE NELSON ON CORNER LEANING OVER) - Independence Hall Complex, Independence Hall, 500 Chestnut Street, Philadelphia, Philadelphia County, PA

83

Exterior oblique view of the north side of Building 3 ...  

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

Exterior oblique view of the north side of Building 3 from across Bay Street (at corner of Taylor Street) looking southeast - North Beach Place, 475 Bay Street, 475 Bay Street, San Francisco, San Francisco County, CA

84

Exterior oblique detail view of typical sidewalk entry at north ...  

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

Exterior oblique detail view of typical sidewalk entry at north side of Building 3 from Bay Street sidewalk, looking southeast - North Beach Place, 475 Bay Street, 475 Bay Street, San Francisco, San Francisco County, CA

85

View of exterior circumferential path at northwest side of building, ...  

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

View of exterior circumferential path at northwest side of building, looking east toward building entrance - National Zoological Park, Bird House, 3001 Connecticut Avenue NW, Washington, District of Columbia, DC

86

1. EXTERIOR VIEW, LOOKING EAST, WITH ENTRANCES AND SIDE ELEVATIONS ...  

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

1. EXTERIOR VIEW, LOOKING EAST, WITH ENTRANCES AND SIDE ELEVATIONS ALONG THE OLD BANKHEAD HIGHWAY (NOW 20TH STREET) AND ELLIOTT BOULEVARD - G. W. Posey Store, Twentieth Street & Elliot Boulevard, Jasper, Walker County, AL

87

29. EXTERIOR CAN CONVEYOR One of three external can ...  

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

29. EXTERIOR - CAN CONVEYOR One of three external can conveyor systems which criss-crossed the multi-leveled confusion of roof structures of the cannery complex. - Hovden Cannery, 886 Cannery Row, Monterey, Monterey County, CA

88

10. Historic exterior view of Building 100. August 22, 1957. ...  

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

10. Historic exterior view of Building 100. August 22, 1957. On file at NASA Plumbrook Research Center, Sandusky, Ohio. NASA photo number C-45766. - Rocket Engine Testing Facility, GRC Building No. 100, NASA Glenn Research Center, Cleveland, Cuyahoga County, OH

89

4. DETAIL ALONG WEST SIDE, SHOWING EXTERIOR STAIRWAY, BUILDING NO. ...  

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

4. DETAIL ALONG WEST SIDE, SHOWING EXTERIOR STAIRWAY, BUILDING NO. 1 IN THE CENTER DISTANCE, AND ONE OF THE BENDING SHOPS AT RIGHT. - United Engineering Company Shipyard, Engineering Building, 2900 Main Street, Alameda, Alameda County, CA

90

1. EXTERIOR OF CIVIL ENGINEERING MAINTENANCE SHOP, BUILDING 103, LOOKING ...  

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

1. EXTERIOR OF CIVIL ENGINEERING MAINTENANCE SHOP, BUILDING 103, LOOKING NORTH. - Mill Valley Air Force Station, Civil Engineering Maintenance Shop, East Ridgecrest Boulevard, Mount Tamalpais, Mill Valley, Marin County, CA

91

1. VIEW OF BUILDING 883 EXTERIOR, LOOKING SOUTHEAST. VENTILATION EQUIPMENT ...  

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

1. VIEW OF BUILDING 883 EXTERIOR, LOOKING SOUTHEAST. VENTILATION EQUIPMENT IS VISIBLE. (11/27/56) - Rocky Flats Plant, Uranium Rolling & Forming Operations, Southeast section of plant, southeast quadrant of intersection of Central Avenue & Eighth Street, Golden, Jefferson County, CO

92

1. EXTERIOR VIEW, LOOKING NORTH NORTHEAST ALONG EASTERN VALLEY ROAD, ...  

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

1. EXTERIOR VIEW, LOOKING NORTH NORTHEAST ALONG EASTERN VALLEY ROAD, WITH FRONT AND SIDE (WEST) ELEVATIONS AND REAR ADDITIONS - Thomas H. Owen House, Eastern Valley Road West of State Road 150, McCalla, Jefferson County, AL

93

2. EXTERIOR OF ENGINE ROOM, CONTAINING MESTACORLISS CROSSCOMPOUND ENGINE, FOR ...  

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

2. EXTERIOR OF ENGINE ROOM, CONTAINING MESTA-CORLISS CROSS-COMPOUND ENGINE, FOR 40" BLOOMING MILL - Republic Iron & Steel Company, Youngstown Works, Blooming Mill & Blooming Mill Engines, North of Poland Avenue, Youngstown, Mahoning County, OH

94

1. EXTERIOR OF ENGINE ROOM, CONTAINING UNITEDTOD TWINTANDEM ENGINE, FOR ...  

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

1. EXTERIOR OF ENGINE ROOM, CONTAINING UNITED-TOD TWIN-TANDEM ENGINE, FOR 40" BLOOMING MILL - Republic Iron & Steel Company, Youngstown Works, Blooming Mill & Blooming Mill Engines, North of Poland Avenue, Youngstown, Mahoning County, OH

95

1. BLOWER (EXTERIOR CONFIGURATION). Hot Springs National Park Bathhouse ...  

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

1. BLOWER (EXTERIOR CONFIGURATION). - Hot Springs National Park Bathhouse Row, Maurice Bathhouse: Mechanical & Piping Systems, State Highway 7, 1 mile north of U.S. Highway 70, Hot Springs, Garland County, AR

96

View of exterior detail; bay on north side of front ...  

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

View of exterior detail; bay on north side of front gable element. - Mare Island Naval Shipyard, Quarters P, Walnut Avenue, northwest corner of Walnut Avenue & Fifth Street, Vallejo, Solano County, CA

97

10 CFR 434.516 - Building exterior envelope.  

Code of Federal Regulations, 2014 CFR

...434.516 Energy DEPARTMENT OF ENERGY ENERGY CONSERVATION ENERGY CODE FOR NEW FEDERAL COMMERCIAL AND MULTI-FAMILY HIGH RISE RESIDENTIAL BUILDINGS Building Energy Cost Compliance Alternative § 434.516 Building exterior...

2014-01-01

98

10 CFR 434.516 - Building exterior envelope.  

Code of Federal Regulations, 2013 CFR

...434.516 Energy DEPARTMENT OF ENERGY ENERGY CONSERVATION ENERGY CODE FOR NEW FEDERAL COMMERCIAL AND MULTI-FAMILY HIGH RISE RESIDENTIAL BUILDINGS Building Energy Cost Compliance Alternative § 434.516 Building exterior...

2013-01-01

99

10 CFR 434.516 - Building exterior envelope.  

Code of Federal Regulations, 2012 CFR

...434.516 Energy DEPARTMENT OF ENERGY ENERGY CONSERVATION ENERGY CODE FOR NEW FEDERAL COMMERCIAL AND MULTI-FAMILY HIGH RISE RESIDENTIAL BUILDINGS Building Energy Cost Compliance Alternative § 434.516 Building exterior...

2012-01-01

100

10 CFR 434.516 - Building exterior envelope.  

Code of Federal Regulations, 2010 CFR

...434.516 Energy DEPARTMENT OF ENERGY ENERGY CONSERVATION ENERGY CODE FOR NEW FEDERAL COMMERCIAL AND MULTI-FAMILY HIGH RISE RESIDENTIAL BUILDINGS Building Energy Cost Compliance Alternative § 434.516 Building exterior...

2010-01-01

101

10 CFR 434.516 - Building exterior envelope.  

Code of Federal Regulations, 2011 CFR

...434.516 Energy DEPARTMENT OF ENERGY ENERGY CONSERVATION ENERGY CODE FOR NEW FEDERAL COMMERCIAL AND MULTI-FAMILY HIGH RISE RESIDENTIAL BUILDINGS Building Energy Cost Compliance Alternative § 434.516 Building exterior...

2011-01-01

102

North exterior elevation of Pope Quadrangle. Note the bas relief ...  

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

North exterior elevation of Pope Quadrangle. Note the bas relief sculpture over the doorway, which includes the school motto, Aspirando et Perseverando. - Avon Old Farms School, 500 Avon Old Farms Road, Avon, Hartford County, CT

103

EXTERIOR NORTH VIEW, WITH BUILDING 91 (ORIGINALLY THE WRIGHT FIELD ...  

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

EXTERIOR NORTH VIEW, WITH BUILDING 91 (ORIGINALLY THE WRIGHT FIELD LAUNDRY) IN THE FOREGROUND - Wright-Patterson Air Force Base, Area B, Building 67, Emergency Power Plant, North side of Third Street between D & E Streets, Dayton, Montgomery County, OH

104

EXTERIOR CLOSEUP VIEW OF SINGLE BAY ON WEST FACADE ...  

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

EXTERIOR CLOSEUP VIEW OF SINGLE BAY ON WEST FACADE - Wright-Patterson Air Force Base, Area B, Building 56, Wright Field Warehouse, block bounded by E & F, Third & Fifth Streets, Dayton, Montgomery County, OH

105

1. EXTERIOR VIEW OF THE REMAINS OF BUILDING 302, THE ...  

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

1. EXTERIOR VIEW OF THE REMAINS OF BUILDING 302, THE MILL VALLEY AIR FORCES STATION GUARDHOUSE, LOOKING EAST. - Mill Valley Air Force Station, Gatehouse, East Ridgecrest Boulevard, Mount Tamalpais, Mill Valley, Marin County, CA

106

3. EXTERIOR VIEW OF THE NORTHEAST RADAR DOME COMPLEX, STRUCTURE ...  

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

3. EXTERIOR VIEW OF THE NORTHEAST RADAR DOME COMPLEX, STRUCTURE 411, LOOKING NORTH. - Mill Valley Air Force Station, Radar Domes, East Ridgecrest Boulevard, Mount Tamalpais, Mill Valley, Marin County, CA

107

4. DETAIL VIEW OF CROSS SECTION OF STRUCTURE, SHOWING EXTERIOR ...  

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

4. DETAIL VIEW OF CROSS SECTION OF STRUCTURE, SHOWING EXTERIOR FACINGS LINED WITH RUBBLE BACKING AND EARTH INFILL, LOOKING EAST - Rock Wall, North side of Battle Creek Canyon, Shingletown, Shasta County, CA

108

BLDG A 102, FRONT DETAIL SHOWING EXTERIOR STAIR AND FIRE ...  

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

BLDG A 102, FRONT DETAIL SHOWING EXTERIOR STAIR AND FIRE ESCAPE. - Naval Magazine Lualualei, Headquarters Branch, Torpedo Shop, Thirteenth Street between Kolekole Road & Gilbert Street, Pearl City, Honolulu County, HI

109

4. EXTERIOR VIEW TO THE EAST OF THE WEST ELEVATION ...  

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

4. EXTERIOR VIEW TO THE EAST OF THE WEST ELEVATION OF THE COLD ASSEMBLY AREA. - Nevada Test Site, Reactor Maintenance Assembly & Dissassembly Facility, Area 25, Jackass Flats, Junction of Roads F & G, Mercury, Nye County, NV

110

6. EXTERIOR VIEW TO THE SOUTH OF THE NORTH ELEVATION ...  

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

6. EXTERIOR VIEW TO THE SOUTH OF THE NORTH ELEVATION OF THE HOT DISASSEMBLY AREA. - Nevada Test Site, Reactor Maintenance Assembly & Dissassembly Facility, Area 25, Jackass Flats, Junction of Roads F & G, Mercury, Nye County, NV

111

8. EXTERIOR VIEW TO THE WEST OF THE EAST ELEVATION ...  

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

8. EXTERIOR VIEW TO THE WEST OF THE EAST ELEVATION OF THE HOT DISASSEMBLY AREA. - Nevada Test Site, Reactor Maintenance Assembly & Dissassembly Facility, Area 25, Jackass Flats, Junction of Roads F & G, Mercury, Nye County, NV

112

7. EXTERIOR VIEW TO THE SOUTHWEST OF THE NORTH AND ...  

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

7. EXTERIOR VIEW TO THE SOUTHWEST OF THE NORTH AND EAST ELEVATIONS. - Nevada Test Site, Reactor Maintenance Assembly & Dissassembly Facility, Area 25, Jackass Flats, Junction of Roads F & G, Mercury, Nye County, NV

113

2. EXTERIOR VIEW TO THE NORTH OF THE SOUTH ELEVATION ...  

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

2. EXTERIOR VIEW TO THE NORTH OF THE SOUTH ELEVATION OF THE HOT DISASSEMBLY AREA. - Nevada Test Site, Reactor Maintenance Assembly & Dissassembly Facility, Area 25, Jackass Flats, Junction of Roads F & G, Mercury, Nye County, NV

114

9. EXTERIOR VIEW TO THE NORTHWEST OF THE SOUTH AND ...  

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

9. EXTERIOR VIEW TO THE NORTHWEST OF THE SOUTH AND EAST ELEVATIONS. - Nevada Test Site, Reactor Maintenance Assembly & Dissassembly Facility, Area 25, Jackass Flats, Junction of Roads F & G, Mercury, Nye County, NV

115

Exterior view of hipped roof with coffee processing structure in ...  

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

Exterior view of hipped roof with coffee processing structure in background, view towards the southwest - Pou Coffee Processing Structure, Casa No. 2, Highway 139, Kilometer 12, Maraguez, Ponce Municipio, PR

116

14. EXTERIOR VIEW OF GEAROPERATED WINDOWS ON SOUTH ELEVATION OF ...  

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

14. EXTERIOR VIEW OF GEAR-OPERATED WINDOWS ON SOUTH ELEVATION OF STAIRS TAKEN FROM ROOF ABOVE SOUTH ENTRANCE - Kodiak Naval Operating Base, Gymnasium, U.S. Coast Guard Station, Kodiak, Kodiak Island Borough, AK

117

Exterior, looking west Beale Air Force Base, Perimeter Acquisition ...  

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

Exterior, looking west - Beale Air Force Base, Perimeter Acquisition Vehicle Entry Phased-Array Warning System, Civil Engineering Storage Building, End of Spencer Paul Road, north of Warren Shingle Road (14th Street), Marysville, Yuba County, CA

118

1. EXTERIORS OF PAINT LOCKER, BUILDING 101, ON RIGHT, AND ...  

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

1. EXTERIORS OF PAINT LOCKER, BUILDING 101, ON RIGHT, AND CIVIL ENGINEERING STORAGE, BUILDING 105 ON LEFT, LOOKING NORTH. - Mill Valley Air Force Station, Storage Building Types, East Ridgecrest Boulevard, Mount Tamalpais, Mill Valley, Marin County, CA

119

37. EXTERIOR, DETAIL VIEW OF GUTTERS AND DRAINAGE PIPES ON ...  

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

37. EXTERIOR, DETAIL VIEW OF GUTTERS AND DRAINAGE PIPES ON EAST ELEVATION FROM SOUTHEAST - Mark Twain House, 351 Farmington Avenue (corrected from original address of 531 Farmington Avenue), Hartford, Hartford County, CT

120

12. EXTERIOR, VIEW OF SOUTHEAST CORNER WITH EDGE OF CARRIAGE ...  

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

12. EXTERIOR, VIEW OF SOUTHEAST CORNER WITH EDGE OF CARRIAGE HOUSE ON LEFT - Mark Twain House, 351 Farmington Avenue (corrected from original address of 531 Farmington Avenue), Hartford, Hartford County, CT

121

24. EXTERIOR, DETAIL VIEW OF THE EAST ELEVATION OF THE ...  

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

24. EXTERIOR, DETAIL VIEW OF THE EAST ELEVATION OF THE PORTE-COCHERE - Mark Twain House, 351 Farmington Avenue (corrected from original address of 531 Farmington Avenue), Hartford, Hartford County, CT

122

21. EXTERIOR, PARTIAL VIEW OF THE EAST ELEVATION OF THE ...  

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

21. EXTERIOR, PARTIAL VIEW OF THE EAST ELEVATION OF THE SERVICE WING, WITHOUT SCALE - Mark Twain House, 351 Farmington Avenue (corrected from original address of 531 Farmington Avenue), Hartford, Hartford County, CT

123

23. EXTERIOR, VIEW OF THE PORTECOCHERE AND EAST ELEVATION FROM ...  

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

23. EXTERIOR, VIEW OF THE PORTE-COCHERE AND EAST ELEVATION FROM THE NORTH - Mark Twain House, 351 Farmington Avenue (corrected from original address of 531 Farmington Avenue), Hartford, Hartford County, CT

124

40. EXTERIOR, DETAIL VIEW OF TEXAS DECK (PORCH), THIRD FLOOR, ...  

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

40. EXTERIOR, DETAIL VIEW OF TEXAS DECK (PORCH), THIRD FLOOR, SOUTHEAST CORNER FROM THE SOUTHEAST - Mark Twain House, 351 Farmington Avenue (corrected from original address of 531 Farmington Avenue), Hartford, Hartford County, CT

125

16. EXTERIOR, GENERAL VIEW OF WEST (REAR) ELEVATION FROM THE ...  

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

16. EXTERIOR, GENERAL VIEW OF WEST (REAR) ELEVATION FROM THE NORTHWEST - Mark Twain House, 351 Farmington Avenue (corrected from original address of 531 Farmington Avenue), Hartford, Hartford County, CT

126

38. EXTERIOR, DETAIL VIEW OF CLERESTORY WINDOWS OF THIRD FLOOR, ...  

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

38. EXTERIOR, DETAIL VIEW OF CLERESTORY WINDOWS OF THIRD FLOOR, EAST ELEVATION - Mark Twain House, 351 Farmington Avenue (corrected from original address of 531 Farmington Avenue), Hartford, Hartford County, CT

127

31. EXTERIOR, DETAIL VIEW ALONG WEST ELEVATION OF THE UMBRA ...  

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

31. EXTERIOR, DETAIL VIEW ALONG WEST ELEVATION OF THE UMBRA TO A FIRST FLOOR WINDOW ON THE SOUTH ELEVATION - Mark Twain House, 351 Farmington Avenue (corrected from original address of 531 Farmington Avenue), Hartford, Hartford County, CT

128

28. EXTERIOR, VIEW FROM THE DECK OF THE UMBRA TO ...  

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

28. EXTERIOR, VIEW FROM THE DECK OF THE UMBRA TO THE EAST PORCH FROM THE SOUTH - Mark Twain House, 351 Farmington Avenue (corrected from original address of 531 Farmington Avenue), Hartford, Hartford County, CT

129

11. EXTERIOR, PARTIAL VIEW OF EAST (FRONT) ELEVATION FROM THE ...  

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

11. EXTERIOR, PARTIAL VIEW OF EAST (FRONT) ELEVATION FROM THE SOUTHEAST - Mark Twain House, 351 Farmington Avenue (corrected from original address of 531 Farmington Avenue), Hartford, Hartford County, CT

130

26. EXTERIOR, EAST ELEVATION, VIEW NORTH FROM PORCH DECK TO ...  

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

26. EXTERIOR, EAST ELEVATION, VIEW NORTH FROM PORCH DECK TO THE PORTE-COCHERE FROM THE SOUTH - Mark Twain House, 351 Farmington Avenue (corrected from original address of 531 Farmington Avenue), Hartford, Hartford County, CT

131

27. EXTERIOR, DETAIL VIEW OF THE WINDSCREEN ON THE NORTH ...  

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

27. EXTERIOR, DETAIL VIEW OF THE WIND-SCREEN ON THE NORTH WALL OF THE PORTE-COCHERE - Mark Twain House, 351 Farmington Avenue (corrected from original address of 531 Farmington Avenue), Hartford, Hartford County, CT

132

39. EXTERIOR, DETAIL VIEW OF SECOND FLOOR WINDOW AND DORMER ...  

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

39. EXTERIOR, DETAIL VIEW OF SECOND FLOOR WINDOW AND DORMER ROOF ON THE EAST SIDE OF THE SOUTH ELEVATION FROM THE SOUTH - Mark Twain House, 351 Farmington Avenue (corrected from original address of 531 Farmington Avenue), Hartford, Hartford County, CT

133

10. EXTERIOR, VIEW OF THE SOUTHERN HALF OF THE EAST ...  

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

10. EXTERIOR, VIEW OF THE SOUTHERN HALF OF THE EAST (FRONT) ELEVATION - Mark Twain House, 351 Farmington Avenue (corrected from original address of 531 Farmington Avenue), Hartford, Hartford County, CT

134

15. EXTERIOR, GENERAL VIEW OF WEST (REAR) ELEVATION AND PARTIAL ...  

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

15. EXTERIOR, GENERAL VIEW OF WEST (REAR) ELEVATION AND PARTIAL NORTH ELEVATION FROM THE NORTHWEST - Mark Twain House, 351 Farmington Avenue (corrected from original address of 531 Farmington Avenue), Hartford, Hartford County, CT

135

14. EXTERIOR, VIEW OF SOUTH ELEVATION WITH PARTIAL VIEW OF ...  

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

14. EXTERIOR, VIEW OF SOUTH ELEVATION WITH PARTIAL VIEW OF EAST ELEVATION - Mark Twain House, 351 Farmington Avenue (corrected from original address of 531 Farmington Avenue), Hartford, Hartford County, CT

136

7. EXTERIOR, GENERAL VIEW OF NORTH (STREET SIDE) ELEVATION FROM ...  

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

7. EXTERIOR, GENERAL VIEW OF NORTH (STREET SIDE) ELEVATION FROM THE NORTH - Mark Twain House, 351 Farmington Avenue (corrected from original address of 531 Farmington Avenue), Hartford, Hartford County, CT

137

41. EXTERIOR, DETAIL VIEW OF THE THIRD FLOOR PORCH ON ...  

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

41. EXTERIOR, DETAIL VIEW OF THE THIRD FLOOR PORCH ON GABLED SOUTHWEST CORNER FROM SOUTHEAST - Mark Twain House, 351 Farmington Avenue (corrected from original address of 531 Farmington Avenue), Hartford, Hartford County, CT

138

25. EXTERIOR, EAST ELEVATION, VIEW OF THE FIRST FLOOR PORCH ...  

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

25. EXTERIOR, EAST ELEVATION, VIEW OF THE FIRST FLOOR PORCH AND PORTE-COCHERE FROM THE SOUTHEAST - Mark Twain House, 351 Farmington Avenue (corrected from original address of 531 Farmington Avenue), Hartford, Hartford County, CT

139

20. EXTERIOR, PARTIAL VIEW OF THE EAST ELEVATION OF THE ...  

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

20. EXTERIOR, PARTIAL VIEW OF THE EAST ELEVATION OF THE SERVICE WING, WITH SCALE - Mark Twain House, 351 Farmington Avenue (corrected from original address of 531 Farmington Avenue), Hartford, Hartford County, CT

140

29. EXTERIOR, VERTICAL VIEW OF UMBRA, SOUTH TOWER, AND CONSERVATORY ...  

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

29. EXTERIOR, VERTICAL VIEW OF UMBRA, SOUTH TOWER, AND CONSERVATORY FROM THE SOUTHEAST - Mark Twain House, 351 Farmington Avenue (corrected from original address of 531 Farmington Avenue), Hartford, Hartford County, CT

141

36. EXTERIOR, DETAIL VIEW OF GABLE WITH CHIMNEY IN BACKGROUND ...  

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

36. EXTERIOR, DETAIL VIEW OF GABLE WITH CHIMNEY IN BACKGROUND FROM THE SOUTHEAST - Mark Twain House, 351 Farmington Avenue (corrected from original address of 531 Farmington Avenue), Hartford, Hartford County, CT

142

5. EXTERIOR OF NORTH SIDE SHOWING ENCLOSED FRONT PORCH AREA, ...  

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

5. EXTERIOR OF NORTH SIDE SHOWING ENCLOSED FRONT PORCH AREA, ALUMINUM SLIDING GLASS WINDOW GLAZING REPLACEMENTS, AND RAILING FOR STAIRS TO BASEMENT. VIEW TO SOUTHWEST. - Bishop Creek Hydroelectric System, Plant 4, Worker Cottage, Bishop Creek, Bishop, Inyo County, CA

143

20. EXTERIOR DETAIL VIEW OF EXPOSED REDWOOD PILE UNDER NORTHEAST ...  

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

20. EXTERIOR DETAIL VIEW OF EXPOSED REDWOOD PILE UNDER NORTHEAST WING ABUTMENT, LOOKING SOUTH TO NORTH - Rowdy Creek Bridge, Spanning Rowdy Creek at Fred Haight Drive, Smith River, Del Norte County, CA

144

17. EXTERIOR DETAIL VIEW OF BRIDGE, NORTHWEST WING ABUTMENT, 1913 ...  

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

17. EXTERIOR DETAIL VIEW OF BRIDGE, NORTHWEST WING ABUTMENT, 1913 SECTION, SHOWING EXPOSED REDWOOD PILE, LOOKING SOUTHWEST TO NORTHEAST - Rowdy Creek Bridge, Spanning Rowdy Creek at Fred Haight Drive, Smith River, Del Norte County, CA

145

18. EXTERIOR DETAIL VIEW OF BRIDGE, NORTHWEST WING ABUTMENT, 1913 ...  

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

18. EXTERIOR DETAIL VIEW OF BRIDGE, NORTHWEST WING ABUTMENT, 1913 SECTION, SHOWING EXPOSED REDWOOD PILE, LOOKING SOUTH TO NORTH - Rowdy Creek Bridge, Spanning Rowdy Creek at Fred Haight Drive, Smith River, Del Norte County, CA

146

DETAIL VIEW OF THE EXTERIOR, EAST ELEVATION, OF THE INSTRUMENTATION ...  

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

DETAIL VIEW OF THE EXTERIOR, EAST ELEVATION, OF THE INSTRUMENTATION AND CONTROL TANKS LOOKING SOUTHWEST. - Marshall Space Flight Center, Redstone Rocket (Missile) Test Stand, Dodd Road, Huntsville, Madison County, AL

147

53. Exterior view of marine railway complex with railway #3 ...  

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

53. Exterior view of marine railway complex with railway #3 in foreground, #2 middle, #1 back. Note rail/roller type (steel railway/steel wheels) - Barbour Boat Works, Tryon Palace Drive, New Bern, Craven County, NC

148

40. Exterior view of dockage, marine railway #4, and assembly ...  

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

40. Exterior view of dockage, marine railway #4, and assembly building. Note BBW Tug Sam on railway and BBW-Built Stardust (#1) at end of dock. - Barbour Boat Works, Tryon Palace Drive, New Bern, Craven County, NC

149

57. Exterior view of marine railway #4. BBW work Tun ...  

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

57. Exterior view of marine railway #4. BBW work Tun Sam on the ways seen from Starboard Bow. Note rail/roller type (steel railway/steel wheels). - Barbour Boat Works, Tryon Palace Drive, New Bern, Craven County, NC

150

55. Exterior view of marine railway #4. BBW work Tug ...  

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

55. Exterior view of marine railway #4. BBW work Tug Sam on the ways seen from Port Bow. This was first railway built by BBW on site (Ca.1936). - Barbour Boat Works, Tryon Palace Drive, New Bern, Craven County, NC

151

Exterior doorway detail south side of building (first floor) east ...  

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

Exterior doorway detail south side of building (first floor) east inset porch; interior staircase visible in background - Fitzsimons General Hospital, Open Air Tuberculosis Ward, West Pennington Avenue & North Hickey Street Southwest Corner, Aurora, Adams County, CO

152

1. EXTERIOR VIEW, LOOKING NORTHWEST, WITH FRONT (MAIN STREET) FACADE ...  

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

1. EXTERIOR VIEW, LOOKING NORTHWEST, WITH FRONT (MAIN STREET) FACADE OF THIS 1850S COURTHOUSE WHICH NOW SERVES AS A COUNTY ARCHIVES AND MUSEUM - Old Shelby County Courthouse, North Main Street, Columbiana, Shelby County, AL

153

2. EXTERIOR OBLIQUE VIEW OF BUILDING 746 FROM EAST K ...  

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

2. EXTERIOR OBLIQUE VIEW OF BUILDING 746 FROM EAST K STREET, LOOKING SOUTHEAST. - Oakland Naval Supply Center, Gymnasium-Cafeteria-Theater, East K Street between Eleventh & Twelfth Streets, Oakland, Alameda County, CA

154

7. NORTH EXTERIOR SIDE SHOWING TRIANGULAR KNEE BRACE SUPPORTS AND ...  

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

7. NORTH EXTERIOR SIDE SHOWING TRIANGULAR KNEE BRACE SUPPORTS AND ENCLOSED PORCH SCREENED WINDOWS. VIEW TO SOUTH. - Big Creek Hydroelectric System, Powerhouse 8, Operator Cottage, Big Creek, Big Creek, Fresno County, CA

155

2. REAR VIEW SHOWING SPLIT SHAKE EXTERIOR AND HEXAHEDRAL PLAN ...  

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

2. REAR VIEW SHOWING SPLIT SHAKE EXTERIOR AND HEXAHEDRAL PLAN AND DENSE LANDSCAPE - Camp Cleawox, Adirondack Sleeping Shelter, Oregon Dunes National Recreation Area, Siuslaw National Forest, Florence, Lane County, OR

156

OBLIQUE VIEW. NOTE THE ROUGHSURFACED EXTERIOR OF THE CONCRETE WALLS. ...  

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

OBLIQUE VIEW. NOTE THE ROUGH-SURFACED EXTERIOR OF THE CONCRETE WALLS. VIEW FACING NORTHEAST - U.S. Naval Base, Pearl Harbor, Ford Island 5-Inch Antiaircraft Battery, Battery Command Center, Ford Island, Pearl City, Honolulu County, HI

157

4. Readiness Crew Building exterior, three tunnels on the south ...  

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

4. Readiness Crew Building exterior, three tunnels on the south side, looking west-northwest. Thalheimer - Whiteman Air Force Base, Bomber Alert Facility S-6, 1300 Alert Road, Knob Noster, Johnson County, MO

158

3. Readiness Crew Building exterior, south and east sides, overall ...  

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

3. Readiness Crew Building exterior, south and east sides, overall view, looking northwest. Thalheimer - Whiteman Air Force Base, Bomber Alert Facility S-6, 1300 Alert Road, Knob Noster, Johnson County, MO

159

EXTERIOR VIEW, BEE HIVE COKE OVEN DOOR. Pratt Coal ...  

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

EXTERIOR VIEW, BEE HIVE COKE OVEN DOOR. - Pratt Coal & Coke Company, Pratt Mines, Coke Ovens & Railroad, Bounded by First Street, Avenue G, Third Place, Birmingham Southern Railroad, Birmingham, Jefferson County, AL

160

Exterior, detail, looking west Beale Air Force Base, Perimeter ...  

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

Exterior, detail, looking west - Beale Air Force Base, Perimeter Acquisition Vehicle Entry Phased-Array Warning System, Power Plant, End of Spencer Paul Road, north of Warren Shingle Road (14th Street), Marysville, Yuba County, CA

161

13. EXTERIOR, STEAM DRIVED AIR COMPRESSOR IN THE MACHINE SHOP, ...  

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

13. EXTERIOR, STEAM DRIVED AIR COMPRESSOR IN THE MACHINE SHOP, NOTE BELL-DRIVES CA. 1937. - Hardie-Tynes Manufacturing Company, Workshop, 800 Twenty-eighth Street North, Birmingham, Jefferson County, AL

162

7. Photocopy of painting (Source unknown, Date unknown) EXTERIOR SOUTH ...  

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

7. Photocopy of painting (Source unknown, Date unknown) EXTERIOR SOUTH FRONT VIEW OF MISSION AND CONVENTO AFTER 1913 - Mission San Francisco Solano de Sonoma, First & Spain Streets, Sonoma, Sonoma County, CA

163

25. Photocopy of photograph (Source unknown, c. 19231925) EXTERIOR, CLOSEUP ...  

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

25. Photocopy of photograph (Source unknown, c. 1923-1925) EXTERIOR, CLOSE-UP OF SOUTH FRONT OF MISSION AFTER RESTORATION, C. 1923-1925 - Mission San Francisco Solano de Sonoma, First & Spain Streets, Sonoma, Sonoma County, CA

164

Brane-world stars with solid crust and vacuum exterior  

E-print Network

The minimal geometric deformation approach is employed to show the existence of brane-world stellar distributions with vacuum Schwarzschild exterior, thus without energy leaking from the exterior of the brane-world star into the extra dimension. The interior satisfies all elementary criteria of physical acceptability for a stellar solution, namely, it is regular at the origin, the pressure and density are positive and decrease monotonically with increasing radius, finally all energy conditions are fulfilled. A very thin solid crust with negative radial pressure separates the interior from the exterior, having a thickness $\\Delta $ inversely proportional to both the brane tension $\\sigma $ and the radius $R$ of the star, i.e. $\\Delta ^{-1}\\sim R\\,\\sigma $. This brane-world star with Schwarzschild exterior would appear only thermally radiating to a distant observer and be fully compatible with the stringent constraints imposed on stellar parameters by observations of gravitational lensing, orbital evolutions or properties of accretion disks.

Jorge Ovalle; László Á. Gergely; Roberto Casadio

2014-11-30

165

8. DETAIL EXTERIOR VIEW OF BRICKWORK AND WINDOW TREATMENT ABOVE ...  

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

8. DETAIL EXTERIOR VIEW OF BRICKWORK AND WINDOW TREATMENT ABOVE MAIN ENTRANCE TO AUDITORIUM. - Bonneville Project, Auditorium, Columbia River, 1 mile Northeast of Exit 40, Interstate 84, Bonneville, Multnomah County, OR

166

44. EXTERIOR VIEW, GREEN SWITCH TOWER, COS COB, SHOWING BARS ...  

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

44. EXTERIOR VIEW, GREEN SWITCH TOWER, COS COB, SHOWING BARS LINKING SWITCH LEVERS AND PIPES LEADING TO SWITCHES - New York, New Haven & Hartford Railroad, Automatic Signalization System, Long Island Sound shoreline between Stamford & New Haven, Stamford, Fairfield County, CT

167

Exterior building details of Building A; north façade: fouroverfour doublehung ...  

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

Exterior building details of Building A; north façade: four-over-four double-hung wood sash window with concrete sill; southerly view - San Quentin State Prison, Building 22, Point San Quentin, San Quentin, Marin County, CA

168

Exterior building details of Building A; north façade: iron latticed ...  

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

Exterior building details of Building A; north façade: iron latticed gate dungeon entrance, granite base; southerly view - San Quentin State Prison, Building 22, Point San Quentin, San Quentin, Marin County, CA

169

Exterior building details of Building A; east façade: fixed fiveoverfive ...  

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

Exterior building details of Building A; east façade: fixed five-over-five wood windows with five-light hoppers with concrete sills; westerly view - San Quentin State Prison, Building 22, Point San Quentin, San Quentin, Marin County, CA

170

1. NEUTRAL BUOYANCY SIMULATOR BUILDING (NBS) EXTERIOR ELEVATION LOOKING NORTH; ...  

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

1. NEUTRAL BUOYANCY SIMULATOR BUILDING (NBS) EXTERIOR ELEVATION LOOKING NORTH; TANK BUILDING TO LEFT, CONTROL ROOM ETC. TO RIGHT OF CONNECTING BAY. - Marshall Space Flight Center, Neutral Buoyancy Simulator Facility, Rideout Road, Huntsville, Madison County, AL

171

4. Bottling Works, interior, view looking north. The west exterior ...  

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

4. Bottling Works, interior, view looking north. The west exterior wall of the Hay and Grain Warehouse is on the right. - Curtis Wharf, Bottling Works, O & Second Streets, Anacortes, Skagit County, WA

172

46. Exterior view at the corner of Seventh Avenue and ...  

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

46. Exterior view at the corner of Seventh Avenue and Olive Way, looking NE. Opening night film, 'The Broadway Melody,' displayed on the canopy marquee. - Fox Theater, Seventh Avenue & Olive Way, Seattle, King County, WA

173

6. DETAIL EXTERIOR VIEW OF WINDOW SHUTTERS ON OUTSIDE OF ...  

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

6. DETAIL EXTERIOR VIEW OF WINDOW SHUTTERS ON OUTSIDE OF FISH HATCHERY BUILDING. - Bonneville Project, Fish Hatchery, On Columbia River bordered on South by Union Pacific, Bonneville, Multnomah County, OR

174

1. GENERAL EXTERIOR VIEW LOOKING SOUTH, SHOWING FACADE OF FISH ...  

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

1. GENERAL EXTERIOR VIEW LOOKING SOUTH, SHOWING FACADE OF FISH HATCHERY BUILDING. - Bonneville Project, Fish Hatchery, On Columbia River bordered on South by Union Pacific, Bonneville, Multnomah County, OR

175

9. GENERAL EXTERIOR VIEW LOOKING NORTH, SHOWING FORMER FISH HATCHERY ...  

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

9. GENERAL EXTERIOR VIEW LOOKING NORTH, SHOWING FORMER FISH HATCHERY OFFICE BUILDING (PRESENTLY USED AS GARDENER'S OFFICE). - Bonneville Project, Fish Hatchery, On Columbia River bordered on South by Union Pacific, Bonneville, Multnomah County, OR

176

4. DETAIL EXTERIOR VIEW OF FISH HATCHERY BUILDING'S CENTRAL GABLE; ...  

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

4. DETAIL EXTERIOR VIEW OF FISH HATCHERY BUILDING'S CENTRAL GABLE; MASONRY WALL AND FLOWERBED IN FOREGROUND. - Bonneville Project, Fish Hatchery, On Columbia River bordered on South by Union Pacific, Bonneville, Multnomah County, OR

177

22. DETAIL EXTERIOR VIEW LOOKING NORTHWEST, SHOWING FISH LADDER AT ...  

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

22. DETAIL EXTERIOR VIEW LOOKING NORTHWEST, SHOWING FISH LADDER AT NORTH END OF DAM/SPILLWAY; VIEW SHOWS SECTION OF FISH LADDER NEAR WHERE IT ENTERS THE COLUMBIA RIVER. - Bonneville Project, Bonneville Dam, Columbia River, Bonneville, Multnomah County, OR

178

2. GENERAL EXTERIOR VIEW OF FISH HATCHERY BUILDING LOOKING NORTH; ...  

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

2. GENERAL EXTERIOR VIEW OF FISH HATCHERY BUILDING LOOKING NORTH; REINFORCED CONCRETE FISH PONDS IN FOREGROUND. - Bonneville Project, Fish Hatchery, On Columbia River bordered on South by Union Pacific, Bonneville, Multnomah County, OR

179

24. DETAIL EXTERIOR VIEW LOOKING EAST, SHOWING FISH LADDER AT ...  

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

24. DETAIL EXTERIOR VIEW LOOKING EAST, SHOWING FISH LADDER AT NORTH END OF DAM/SPILLWAY; WATER FLOWING THROUGH FISH LADDER IS VISIBLE AT BOTTOM. - Bonneville Project, Bonneville Dam, Columbia River, Bonneville, Multnomah County, OR

180

3. DETAIL EXTERIOR VIEW LOOKING SOUTHEAST SHOWING CENTER GABLE SECTION ...  

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

3. DETAIL EXTERIOR VIEW LOOKING SOUTHEAST SHOWING CENTER GABLE SECTION OF THE FISH HATCHERY BUILDING. - Bonneville Project, Fish Hatchery, On Columbia River bordered on South by Union Pacific, Bonneville, Multnomah County, OR

181

Exterior, looking west Beale Air Force Base, Perimeter Acquisition ...  

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

Exterior, looking west - Beale Air Force Base, Perimeter Acquisition Vehicle Entry Phased-Array Warning System, Clean Lubrication Oil Storage Tank & Enclosure, End of Spencer Paul Road, north of Warren Shingle Road (14th Street), Marysville, Yuba County, CA

182

CAR MACHINE SHOP, SECOND FLOOR, PAINT SPRAY ROOM EXTERIOR AND ...  

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

CAR MACHINE SHOP, SECOND FLOOR, PAINT SPRAY ROOM EXTERIOR AND ATTIC FLOOR SUPPORT COLUMNS AND BEAMS, LOOKING WEST. - Southern Pacific, Sacramento Shops, Car Machine Shop, 111 I Street, Sacramento, Sacramento County, CA

183

4. EXTERIOR VIEW LOOKING EAST. WATER IN THE AQUEDUCT CAN ...  

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

4. EXTERIOR VIEW LOOKING EAST. WATER IN THE AQUEDUCT CAN CAN BE DIVERTED AT THE WASTE WEIR TO BE DISCHARGED INTO THE CULVERT IN FOREGROUND. - Old Croton Aqueduct, Northern Waste Weir, Snowden Avenue & Van Wick Street, Ossining, Westchester County, NY

184

Neptune's rings  

NASA Technical Reports Server (NTRS)

This 591-second exposure of the rings of Neptune were taken with the clear filter by the Voyager 2 wide-angle camera. The two main rings are clearly visible and appear complete over the region imaged. Also visible in this image is the inner faint ring and the faint band which extends smoothly from the ring roughly halfway between the two bright rings. Both of these newly discovered rings are broad and much fainter than the two narrow rings. The bright glare is due to over-exposure of the crescent on Neptune. Numerous bright stars are evident in the background. Both bright rings have material throughout their entire orbit, and are therefore continuous. The Voyager Mission is conducted by JPL for NASA's Office of Space Science and Applications.

1999-01-01

185

Planetary Rings: Structure, Evolution and Origin  

NASA Astrophysics Data System (ADS)

Using spacecraft and telescopic observations, I review the gross physical and morphological properties of the distinctive ring systems of each of the giant planets. In addition to their intrinsic interest, planetary rings provide proximate, but imperfect, analogs for more distant and massive structures, such as accretion and protoplanetary disks, which are of considerable current astronomical interest. Jupiter's dusty rings, strongly influenced by electromagnetic forces, appear to be derived of debris sloughed off small exterior satellites. Uranus's nine surprisingly narrow, eccentric and inclined rings hint at a role for self-gravitational effects. Neptune's most massive ring contains several clumps, likely due to satellite interactions. Saturn's resplendent rings display aspects of all the other systems. As time allows, I will mention observations planned for Cassini, a spacecraft mission just now starting a 4+-year tour of Saturn. Structures that develop owing to gravitational forces and collective effects can be destroyed by physical collisions and tidal shear. Satellites --near and far-- play important roles in sculpting planetary rings. Embedded satellites can be sources but also sinks for ring material. Moons generate clumps and kinks in narrow rings, and gravitational wakes and waves in continuous disks. The frequencies contained in the epicyclic motion of nearby satellites can resonate with the epicyclic frequencies of ring particles, thereby initiating spiral density and bending waves at some locations; from such features, one can infer ring surface density and viscosity. The resultant angular momentum transfer can open gaps or terminate rings. Besides moons, non-uniform magnetic or gravity fields can generate noticeable features. I provide simple illustrations of such phenomena, and supplement them with numerical simulations. Several lines of evidence indicate that planetary rings are considerably younger than the solar system. The jury is still out on possible ring origin(s).

Burns, J. A.

2004-12-01

186

Interaction of the Local Interstellar Medium with the Heliosphere: Role of the Interior and Exterior Magnetic Fields  

NASA Technical Reports Server (NTRS)

A complete model of the global interaction between the solar wind and the local interstellar medium must take account of interstellar neutral atoms, interstellar ionized gas, solar and galactic magnetic fields, galactic and anomalous cosmic rays. For now, however, in view of the many uncertainties about conditions in the interstellar medium, etc., all models must be regarded as highly idealized and incomplete. In the present review I concentrate on the role of magnetic fields of solar and interstellar origin. The former, the interior field, has negligible influence on the unshocked solar wind; the immediate post-shock solar wind is probably low-beta, so that the interior magnetic field is still unimportant, but this situation changes as the plasma flows through the heliosheath, and a ridge of strong magnetic field may form to separate materials of polar and equatorial origin. The exterior (interstellar) field is likely to play an important role in determining the global morphology of the system outside the termination shock. If the exterior field is strong enough, it can compress the heliosphere (although exterior neutral and/or ionized hydrogen may play the dominant role). Even if the interstellar magnetic field does not provide the dominant pressure, its orientation can substantially affect the configuration of the heliosphere, especially the location and orientation of the heliospheric discontinuities. The configurations can be quite different for the situations in which the field and flow are (a) aligned or (b) transverse. Obliquity of the field produces asymmetry in the geometry of the system; in particular the noses of heliopause and interstellar bow shock are shifted away from the interstellar flow direction, and in opposite directions, due to the asymmetric draping of the magnetic field.

Barnes, Aaron; DeVincenzi, Donald (Technical Monitor)

2000-01-01

187

Galactic Metrics  

E-print Network

The paths of stars in galaxies have circular velocity independent of their distance from the centre of the galaxy. Newtonian mechanics with a logarithmic potential has such paths. In relativity these paths can be taken to be geodesics and this requirement places a resticting equation on the spacetime metric. This equation has a non-unique spherically symmetric solution that in the newtonian limit has a logarithmic potential. It also can be solved in terms of a conformal factor. In particular it has solutions which are conformal to the vacuum-Einstein solutions and such spacetimes are solutions to the vacuum-Bach equations. Therefore it is suggested that the Bach equations describe dynamics on galactic lenght scales.

Mark D. Roberts

2002-12-17

188

Planetary Rings  

NASA Astrophysics Data System (ADS)

Planetary rings are the only nearby astrophysical disks and the only disks that have been investigated by spacecraft (especially the Cassini spacecraft orbiting Saturn). Although there are significant differences between rings and other disks, chiefly the large planet/ring mass ratio that greatly enhances the flatness of rings (aspect ratios as small as 10- 7), understanding of disks in general can be enhanced by understanding the dynamical processes observed at close range and in real time in planetary rings.We review the known ring systems of the four giant planets, as well as the prospects for ring systems yet to be discovered. We then review planetary rings by type. The A, B, and C rings of Saturn, plus the Cassini Division, comprise our solar system's only dense broad disk and host many phenomena of general application to disks including spiral waves, gap formation, self-gravity wakes, viscous overstability and normal modes, impact clouds, and orbital evolution of embedded moons. Dense narrow rings are found both at Uranus (where they comprise the main rings entirely) and at Saturn (where they are embedded in the broad disk) and are the primary natural laboratory for understanding shepherding and self-stability. Narrow dusty rings, likely generated by embedded source bodies, are surprisingly found to sport azimuthally confined arcs at Neptune, Saturn, and Jupiter. Finally, every known ring system includes a substantial component of diffuse dusty rings.Planetary rings have shown themselves to be useful as detectors of planetary processes around them, including the planetary magnetic field and interplanetary impactors as well as the gravity of nearby perturbing moons. Experimental rings science has made great progress in recent decades, especially numerical simulations of self-gravity wakes and other processes but also laboratory investigations of coefficient of restitution and spectroscopic ground truth. The age of self-sustained ring systems is a matter of debate; formation scenarios are most plausible in the context of the early solar system, while signs of youthfulness indicate at least that rings have never been static phenomena.

Tiscareno, Matthew S.

189

EXTERIOR PERSPECTIVE FROM BARN YARD SHOWING EAST AND SOUTH FAÇADES ...  

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

EXTERIOR PERSPECTIVE FROM BARN YARD SHOWING EAST AND SOUTH FAÇADES OF THE BARN, LOOKING NORTHWEST. The sliding door on the barns east façade leads into the animal pens and milking stalls. The barn?s hip-on-gable roof is covered in corrugated metal. The gable end is clad in board and battens, matching the rest of the barns exterior. The pump house can be seen to the north; the garage to the west. - Kineth Farm, Barn, 19162 STATE ROUTE 20, Coupeville, Island County, WA

190

Vortex rings  

NASA Technical Reports Server (NTRS)

The vortex-ring problem in fluid mechanics is examined generally in terms of formation, the steady state, the duration of the rings, and vortex interactions. The formation is studied by examining the generation of laminar and turbulent vortex rings and their resulting structures with attention given to the three stages of laminar ring development. Inviscid dynamics is addressed to show how core dynamics affects overall ring motion, and laminar vortex structures are described in two dimensions. Viscous and inviscid structures are related in terms of 'leapfrogging', head-on collisions, and collisions with a no-slip wall. Linear instability theory is shown to successfully describe observational data, although late stages in the breakdown are not completely understood. This study of vortex rings has important implications for key aerodynamic issues including sound generation, transport and mixing, and vortex interactions.

Shariff, Karim; Leonard, Anthony

1992-01-01

191

Evaluation of properties of varnishes, exterior stains and exterior primers. Final report 30 July 1983-30 April 1984  

SciTech Connect

This report presents the results of a project to evaluate the performance of recently developed water-based and low-solvent varnishes, exterior stains and exterior primers to determine if these products have properties equivalent to the conventional high-solvent products which are now used for the same purpose. Products were solicited from a select group of coating and raw material suppliers. A total of 16 companies responded, submitting samples of 30 low-solvent and 25 conventional coatings, including interior and exterior varnishes, semi-transparent and opaque stains, and primers. Standard ASTM test methods were used. Some of the new products tested had performance properties equivalent to or better than the conventional high-solvent coatings. The appendices contain test data and procedures.

Willner, J.J.; Spindel, S.; Levinson, S.B.

1984-06-06

192

EXTERIOR VIEW, LOOKING SOUTHEAST, WITH FRONT FACADE AND PORCH. FREE ...  

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

EXTERIOR VIEW, LOOKING SOUTHEAST, WITH FRONT FACADE AND PORCH. FREE STANDING BRICK GABLED ROOF SHOWS EVIDENCE OF RECENT FIRE WHICH PARTIALLY DESTROYED THE PROPERTY WHICH WAS BUILT IN THE 1840S FOR THE THEN IRON MASTER HORACE WARE. - Shelby Iron Works, Iron Master's House, County Road 42, Shelby, Shelby County, AL

193

2. EXTERIOR VIEW OF DOWNSTREAM SIDE OF COTTAGE 191 TAKEN ...  

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

2. EXTERIOR VIEW OF DOWNSTREAM SIDE OF COTTAGE 191 TAKEN FROM ROOF OF GARAGE 393. CAMERA FACING SOUTHEAST. COTTAGE 181 AND CHILDREN'S PLAY AREA VISIBLE ON EITHER SIDE OF ROOF. GRAPE ARBOR IN FOREGROUND. - Swan Falls Village, Cottage 191, Snake River, Kuna, Ada County, ID

194

FACILITY 301. EXTERIOR OBLIQUE OF FRONT AND SIDE WITH ONESTORY ...  

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

FACILITY 301. EXTERIOR OBLIQUE OF FRONT AND SIDE WITH ONE-STORY WING IN FOREGROUND, VIEW FACING EAST. - U.S. Naval Base, Pearl Harbor, Naval Housing Area Hospital Point, Surgeon's Quarters Type, 2-5 First Street, Pearl City, Honolulu County, HI

195

1. EXTERIOR VIEW, LOOKING WEST WITH FRONT FACADE AND ENTRANCE ...  

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

1. EXTERIOR VIEW, LOOKING WEST WITH FRONT FACADE AND ENTRANCE TO FORMER TCI-US STEEL COMPANY BATHHOUSE FOR WHITE ORE MINERS. - Tennessee Coal & Iron-U.S. Steel Surface Plant, Company Bathhouse for White Ore Miners, East of State Route 150 on South slope of Red Mountain, Bessemer, Jefferson County, AL

196

1. EXTERIOR VIEW, LOOKING SOUTH, WITH SIDE FACADE AND ENTRANCE ...  

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

1. EXTERIOR VIEW, LOOKING SOUTH, WITH SIDE FACADE AND ENTRANCE TO THE FORMER TCI-US STEEL COMPANY BATHHOUSE FOR COLORED ORE MINERS. - Tennessee Coal & Iron-U.S. Steel Surface Plant, Company Bathhouse for Black Ore Miners, East of State Route 150 on South slope of Red Mountain, Bessemer, Jefferson County, AL

197

7. GENERAL EXTERIOR VIEW LOOKING EAST, SHOWING NAVIGATION LOCK #1 ...  

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

7. GENERAL EXTERIOR VIEW LOOKING EAST, SHOWING NAVIGATION LOCK #1 FILLED WITH WATER AND CONTAINING A SHIPMENT OF FLOATING LOGS; THE LOCK WILL SOON BE EMPTIED SO THE LOGS CAN CONTINUE THEIR JOURNEY DOWNSTREAM - Bonneville Project, Navigation Lock No. 1, Oregon shore of Columbia River near first Powerhouse, Bonneville, Multnomah County, OR

198

EXTERIOR VIEW, RIGHT SIDE OF LOCOMOTIVE SHOWING WHEEL ASSEMBLY WITH ...  

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

EXTERIOR VIEW, RIGHT SIDE OF LOCOMOTIVE SHOWING WHEEL ASSEMBLY WITH BIG END OF MAIN ROD (TOP), ECCENTRIC CRANK (CENTER), AND BIG END CONCENTRIC ROD (BOTTOM). - Norfolk & Southern Steam Locomotive No. 611, Norris Yards, East of Ruffner Road, Irondale, Jefferson County, AL

199

Exterior view, westsouthwest, of Jeudevine Memorial Library. Built 18961897 and ...  

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

Exterior view, west-southwest, of Jeudevine Memorial Library. Built 1896-1897 and designed by local architect Lambert Packard, the library is an excellent example of Richardsonian Romanesque architecture. - Jeudevine Memorial Library, 93 North Main Street, Hardwick, Caledonia County, VT

200

5. Photocopy of old exterior photo showing Western Saving Fund ...  

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

5. Photocopy of old exterior photo showing Western Saving Fund Society before the addition of ca. 1910 building. Original photo, late 19th century, is at the Philadelphia Free Library, Philadelphia Collection, Print and Picture Department. - Western Saving Fund Society of Philadelphia, 1000-1008 Walnut Street, Philadelphia, Philadelphia County, PA

201

9. EXTERIOR OF ENCLOSED PORTION OF SECOND FLOOR WEST SIDE ...  

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

9. EXTERIOR OF ENCLOSED PORTION OF SECOND FLOOR WEST SIDE APARTMENT ENTRYWAY SHOWING STAIR LANDING AND OPEN FRONT DOOR FLANKED BY PAIRED 4-LIGHT OVER 4-LIGHT DOUBLE-HUNG, WOOD-FRAME WINDOWS. VIEW TO NORTHEAST. - Lee Vining Creek Hydroelectric System, Triplex Cottage, Lee Vining Creek, Lee Vining, Mono County, CA

202

11. Exterior view, showing instrumentation and gauge panel at walkin ...  

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

11. Exterior view, showing instrumentation and gauge panel at walk-in entry level (bottom) of Test Cell 7, Systems Integration Laboratory Building (T-28), looking west. Metal stair at left leads to working platform levels surrounding test cell. - Air Force Plant PJKS, Systems Integration Laboratory, Systems Integration Laboratory Building, Waterton Canyon Road & Colorado Highway 121, Lakewood, Jefferson County, CO

203

5. Exterior view, enclosure at walkin entry level between Test ...  

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

5. Exterior view, enclosure at walk-in entry level between Test Cell 6 (right) and Test Cell 7 (left), Systems Integration Laboratory Building (T-28), looking southwest. High pressure gas tank and generator test firings are conducted in the enclosure. - Air Force Plant PJKS, Systems Integration Laboratory, Systems Integration Laboratory Building, Waterton Canyon Road & Colorado Highway 121, Lakewood, Jefferson County, CO

204

RIVER VIEW FROM EXTERIOR LOCK WALL SHOWING DAM GATE, MANEUVER ...  

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

RIVER VIEW FROM EXTERIOR LOCK WALL SHOWING DAM GATE, MANEUVER BOAT No. 1, AND DAM. LOOKING NORTH NORTHEAST. - Illinois Waterway, La Grange Lock and Dam, 3/4 mile south of Country 795N at Illinois River, Versailles, Brown County, IL

205

Exterior building details of Building C, east façade: historic six ...  

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

Exterior building details of Building C, east façade: historic six light entry double door with three light transom, historic six light door with a one light transom, arch brick lintels and quoins, scored cement plaster finished brick walls; westerly view - San Quentin State Prison, Building 22, Point San Quentin, San Quentin, Marin County, CA

206

Exterior building details of Building D, east façade: painted concrete ...  

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

Exterior building details of Building D, east façade: painted concrete east face façade, main entry has flat cement plaster surround, double door six light over panels, two light transom over double door; westerly view - San Quentin State Prison, Building 22, Point San Quentin, San Quentin, Marin County, CA

207

Exterior building details of Building A; east façade: recessed panel ...  

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

Exterior building details of Building A; east façade: recessed panel inscribed "1859", historic window opening with concrete sill above door, cement plaster dentil course and cornice, truncated wood beam ends, plaster finished brick wall, granite base; westerly view - San Quentin State Prison, Building 22, Point San Quentin, San Quentin, Marin County, CA

208

Exterior building details of Building A; east façade: profiled cement ...  

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

Exterior building details of Building A; east façade: profiled cement plaster door surround, black mesh gate protects a two-light transom atop non-original metal door; westerly view - San Quentin State Prison, Building 22, Point San Quentin, San Quentin, Marin County, CA

209

Exterior building details of Building A; east façade: concrete staircase, ...  

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

Exterior building details of Building A; east façade: concrete staircase, profiled cement, plaster door surround, recessed panel inscribed "1859", historic window opening with concrete sill above door, cement plaster dentil course and cornice truncated wood beam ends, plaster finished brick wall, granite base; westerly view - San Quentin State Prison, Building 22, Point San Quentin, San Quentin, Marin County, CA

210

Exterior, looking southeast from within compound towards Main Gate, Gate ...  

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

Exterior, looking southeast from within compound towards Main Gate, Gate House center left - Beale Air Force Base, Perimeter Acquisition Vehicle Entry Phased-Array Warning System, Gate House, End of Spencer Paul Road, north of Warren Shingle Road (14th Street), Marysville, Yuba County, CA

211

Exterior, looking northwest towards Main Gate, Gate House on left, ...  

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

Exterior, looking northwest towards Main Gate, Gate House on left, Technical Equipment Building (Building 5760) in background to right - Beale Air Force Base, Perimeter Acquisition Vehicle Entry Phased-Array Warning System, Gate House, End of Spencer Paul Road, north of Warren Shingle Road (14th Street), Marysville, Yuba County, CA

212

14. EXTERIOR VIEW OF OLD TENFOOT WIND TUNNEL (1991). ...  

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

14. EXTERIOR VIEW OF OLD TEN-FOOT WIND TUNNEL (1991). - Wright-Patterson Air Force Base, Area B, Buildings 25 & 24,10-foot & 20-foot Wind Tunnel Complex, Northeast side of block bounded by K, G, Third, & Fifth Streets, Dayton, Montgomery County, OH

213

13. EXTERIOR VIEW OF OLD TENFOOT WIND TUNNEL (1991). ...  

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

13. EXTERIOR VIEW OF OLD TEN-FOOT WIND TUNNEL (1991). - Wright-Patterson Air Force Base, Area B, Buildings 25 & 24,10-foot & 20-foot Wind Tunnel Complex, Northeast side of block bounded by K, G, Third, & Fifth Streets, Dayton, Montgomery County, OH

214

15. DETAIL EXTERIOR VIEW LOOKING NORTH SHOWING REINFORCED CONCRETE PILLBOX ...  

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

15. DETAIL EXTERIOR VIEW LOOKING NORTH SHOWING REINFORCED CONCRETE PILLBOX ON BRADFORD ISLAND END OF DAM/SPILLWAY; THE PILLBOX WAS BUILT DURING WORLD WAR II TO HELP PROTECT THE DAM/SPILLWAY FROM SABOTAGE. - Bonneville Project, Bonneville Dam, Columbia River, Bonneville, Multnomah County, OR

215

Exterior oblique detail view of sidewalk entry at north side ...  

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

Exterior oblique detail view of sidewalk entry at north side of Building 3 from Bay Street sidewalk, looking southeast (with original steps revised to accommodate handicap ramp) - North Beach Place, 475 Bay Street, 475 Bay Street, San Francisco, San Francisco County, CA

216

Exterior oblique view of the west side of Building 9 ...  

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

Exterior oblique view of the west side of Building 9 from across Taylor Street (at Bay Street and Taylor Street, cable-car turnaround), looking southeast - North Beach Place, 491 Bay Street, 590 Francisco Street, 491 Bay Street, 590 Francisco Street, San Francisco, San Francisco County, CA

217

EXTERIOR VIEW, LOOKING SOUTH, SIDE AND FRONT FACADES OF THE ...  

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

EXTERIOR VIEW, LOOKING SOUTH, SIDE AND FRONT FACADES OF THE RESIDENCE CONSTRUCTED FOR DON BACON, PRESIDENT OF TENNESSEE COAL AND IRON COMPANY (TCI), THE FORERUNNER OF BIRMINGHAM'S US STEEL SUBSIDIARY. - Tennessee Coal & Iron Company, President's House, 1405 Minnesota Avenue, Bessemer, Jefferson County, AL

218

DETAIL OF EXTERIOR OF UNIT A LANAI WALL SHOWING THE ...  

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

DETAIL OF EXTERIOR OF UNIT A LANAI WALL SHOWING THE DECORATIVE CONCRETE MASONRY. VIEW FACING SOUTH - Camp H.M. Smith and Navy Public Works Center Manana Title VII (Capehart) Housing, U-Shaped Two-Bedroom Duplex Type 1, Acacia Road, Birch Circle, and Cedar Drive, Pearl City, Honolulu County, HI

219

4. NORTH EXTERIOR SIDE OF KERN RIVER No. 1 POWERHOUSE ...  

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

4. NORTH EXTERIOR SIDE OF KERN RIVER No. 1 POWERHOUSE BUILDING SHOWING TAILRACES FOR (LEFT TO RIGHT IN PHOTO) GENERATOR UNITS Nos. 4 AND 3, EXCITER No. 1, AND GENERATOR UNITS Nos. 2 AND 1. POWERHOUSE BUILDING NORTH EXIT DOOR IS IN CENTER OF WALL. VIEW TO SOUTHWEST. - Kern County No. 1 Hydroelectric System, Powerhouse Exciters, Kern River Canyon, Bakersfield, Kern County, CA

220

29. Photograph of four historic views of exterior of Bowditch ...  

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

29. Photograph of four historic views of exterior of Bowditch Hall, c. 1950, taken from album in building photo files in Caretaker Site Office, Naval Undersea Warfare Center, New London. Copyright-free. - Naval Undersea Warfare Center, Bowditch Hall, 600 feet east of Smith Street & 350 feet south of Columbia Cove, West bank of Thames River, New London, New London County, CT

221

39. Historic photo of Building 202 test cell exterior, showing ...  

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

39. Historic photo of Building 202 test cell exterior, showing fiberglass cladding blown out by hydrogen fire during rocket engine testing, April 27, 1959. On file at NASA Plumbrook Research Center, Sandusky, Ohio. NASA photo number C-50472. - Rocket Engine Testing Facility, GRC Building No. 202, NASA Glenn Research Center, Cleveland, Cuyahoga County, OH

222

42. Historic photo of exterior of Building 202 test cell, ...  

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

42. Historic photo of exterior of Building 202 test cell, January 26, 1960. On file at NASA Plumbrook Research Center, Sandusky, Ohio. NASA photo number C-52534. - Rocket Engine Testing Facility, GRC Building No. 202, NASA Glenn Research Center, Cleveland, Cuyahoga County, OH

223

1. EXTERIOR VIEW OF HILLSIDE PLANT FROM INTERSECTION OF LINCOLN ...  

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

1. EXTERIOR VIEW OF HILLSIDE PLANT FROM INTERSECTION OF LINCOLN STREET AND 2ND AVENUE. HILLSIDE PLANT WAS BUILT AS CALLAWAY MILLS HILLSIDE COTTON MILL (PARK A. DALLIS, 1914-15). THIS TWO-STORY SECTION WAS BUILT AS A WEAVE SHED. - Hillside Cotton Mill, 1300 Brownwood Avenue, La Grange, Troup County, GA

224

1. EXTERIOR OVERVIEW SHOWING FRONT (EAST) END AND SOUTH SIDE ...  

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

1. EXTERIOR OVERVIEW SHOWING FRONT (EAST) END AND SOUTH SIDE OF BUILDING 103, ROCK WALL AND MATURE COTTONWOOD TREES IN FOREGROUND, CONTROL SUBSTATION BEHIND BUILDING 103, AND BUILDING 106 BEHIND THE COTTONWOOD TREE IN THE NORTH BACKGROUND. VIEW TO NORTH. - Bishop Creek Hydroelectric System, Control Station, Worker Cottage, Bishop Creek, Bishop, Inyo County, CA

225

52. Exterior view of yard at marine railway #2. Not ...  

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

52. Exterior view of yard at marine railway #2. Not rail/roller type (wood beam with steel plate rail on sled/roller railway). Steel fabrication building and traveling crane in background. - Barbour Boat Works, Tryon Palace Drive, New Bern, Craven County, NC

226

The Conversion of Exterior Wall Facings for Climbing Activities.  

ERIC Educational Resources Information Center

The conversion of existing exterior walls to provide facilities for outdoor rock climbing activities is described with particular emphasis on design to provide practice in basic movement skills such as correct use of holds, balance, controlled change of position, traversing, and moving up and down. (JMF)

March, Bill; Toft, Murray

1979-01-01

227

11. EXTERIOR VIEW OF UNITED STATES AIR FORCE MAN EXAMINING ...  

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

11. EXTERIOR VIEW OF UNITED STATES AIR FORCE MAN EXAMINING CONTENTS OF SHIELDING TANK AS FUEL ELEMENT ASSEMBLY IS RAISED AND LOWERED. INEL PHOTO NUMBER 65-6172, TAKEN NOVEMBER 10, 1965. - Idaho National Engineering Laboratory, Advanced Reentry Vehicle Fusing System, Scoville, Butte County, ID

228

BEDROOM 1 SHOWING THE OPENING IN THE EXTERIOR WALL FOR ...  

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

BEDROOM 1 SHOWING THE OPENING IN THE EXTERIOR WALL FOR AN AIR CONDITIONER. VIEW FACING NORTHEAST - Camp H.M. Smith and Navy Public Works Center Manana Title VII (Capehart) Housing, U-Shaped Three-Bedroom Duplex Type 3, Acacia Road, Birch Circle, and Cedar Drive, Pearl City, Honolulu County, HI

229

EXTERIOR VIEW, THE SA WETSIDE BUILDING (ALSO KNOWN AS DISTILLATION ...  

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

EXTERIOR VIEW, THE SA WETSIDE BUILDING (ALSO KNOWN AS DISTILLATION BUILDING OR SOLVAY TOWERS BUILDING) THE HEART OF THE SOLVAY PROCESS. VIEW LOOKING EAST. THIS BUILDING WAS BUILT IN 1954 TO REPLACE A SIMILAR STRUCTURE BUILT CIRCA 1907. - Solvay Process Company, SA Wetside Building, Between Willis & Milton Avenue, Solvay, Onondaga County, NY

230

Exterior oblique view of west side of Building 12, from ...  

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

Exterior oblique view of west side of Building 12, from northwest corner of courtyard, looking southeast with community garden in the foreground - North Beach Place, 561 Bay Street, 1120 Columbus Street, 561 Bay Street, 1120 Columbus Street, San Francisco, San Francisco County, CA

231

7. EXTERIOR OF FRONT (WEST END) AND NORTH SIDE SHOWING ...  

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

7. EXTERIOR OF FRONT (WEST END) AND NORTH SIDE SHOWING PROJECTED PURLINS AND EXPOSED RAFTER UNDER THE EAVES, AND SATELLITE TELEVISION DISH ON NORTH SIDE OF HOUSE. VIEW TO SOUTHEAST. - Bishop Creek Hydroelectric System, Plant 4, Worker Cottage, Bishop Creek, Bishop, Inyo County, CA

232

24. EXTERIOR VIEW, SHOWING AIRPLANES IN VERY DEEP SNOW. Photographic ...  

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

24. EXTERIOR VIEW, SHOWING AIRPLANES IN VERY DEEP SNOW. Photographic copy of historic photograph. July-Dec. 1948 OAMA (original print located at Ogden Air Logistics Center, Hill Air Force Base, Utah). Photographer unknown. - Hill Field, Airplane Repair Hangars No. 1-No. 4, 5875 Southgate Avenue, Layton, Davis County, UT

233

3. Exterior view of perimeter fence, view towards east ...  

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

3. Exterior view of perimeter fence, view towards east - Ellsworth Air Force Base, Delta Flight, Launch Facility D-6, 4 miles north of Badlands National Park Headquarters, 4.5 miles east of Jackson County line on county road, Interior, Jackson County, SD

234

EXTERIOR VIEW, LOOKING WEST, WITH SWITCHING ENGINE TRANSPORTING TORPEDO LADLE ...  

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

EXTERIOR VIEW, LOOKING WEST, WITH SWITCHING ENGINE TRANSPORTING TORPEDO LADLE FILLED WITH MOLTEN IRON TO THE Q-BOP FURNACES. VERTICAL CONVEYOR TRANSPORTS ALL PROCESS MATERIAL INCLUDING COKE AND PELLETS TO FURNACE. - U.S. Steel, Fairfield Works, Blast Furnace No. 8, North of Valley Road, West of Ensley-Pleasant Grove Road, Fairfield, Jefferson County, AL

235

5. EXTERIOR VIEW TO THE SOUTHEAST OF THE NORTH AND ...  

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

5. EXTERIOR VIEW TO THE SOUTHEAST OF THE NORTH AND WEST ELEVATIONS, WITH THE COLD ASSEMBLY AREA TO THE RIGHT AND THE HOT DISASSEMBLY AREA TO THE LEFT. - Nevada Test Site, Reactor Maintenance Assembly & Dissassembly Facility, Area 25, Jackass Flats, Junction of Roads F & G, Mercury, Nye County, NV

236

19. VIEW TO THE NORTH FROM THE EXTERIOR INTO THE ...  

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

19. VIEW TO THE NORTH FROM THE EXTERIOR INTO THE INTERIOR OF ROOM 105, THE BOILER ROOM FOR THE BUILDING. - Nevada Test Site, Reactor Maintenance Assembly & Dissassembly Facility, Area 25, Jackass Flats, Junction of Roads F & G, Mercury, Nye County, NV

237

1. EXTERIOR VIEW TO THE NORTH OF THE SOUTH ELEVATIONS ...  

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

1. EXTERIOR VIEW TO THE NORTH OF THE SOUTH ELEVATIONS OF THE R-MAD FACILITY WITH THE COLD ASSEMBLY AREA ON THE LEFT AND THE HOT DISASSEMBLY AREA TO THE RIGHT. - Nevada Test Site, Reactor Maintenance Assembly & Dissassembly Facility, Area 25, Jackass Flats, Junction of Roads F & G, Mercury, Nye County, NV

238

3. EXTERIOR VIEW TO THE NORTH OF THE SOUTH ELEVATION ...  

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

3. EXTERIOR VIEW TO THE NORTH OF THE SOUTH ELEVATION OF THE ADMINISTRATION AREA IN THE COLD ASSEMBLY AREA, WITH THE MAIN ENTRANCE 'KENNEDY DOORS' IN THE MIDDLE. - Nevada Test Site, Reactor Maintenance Assembly & Dissassembly Facility, Area 25, Jackass Flats, Junction of Roads F & G, Mercury, Nye County, NV

239

16. EXTERIOR NORTH END OF TULE RIVER POWERHOUSE SHOWING POWERHOUSE ...  

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

16. EXTERIOR NORTH END OF TULE RIVER POWERHOUSE SHOWING POWERHOUSE AT PHOTO CENTER, SUBSTATION AT PHOTO RIGHT FOREGROUND, OFFICE BEHIND SUBSTATION AT RIGHT OF POWERHOUSE, AND MACHINE SHOP AT LEFT OF POWERHOUSE. THIS PHOTOGRAPH DUPLICATES HISTORIC VIEW SHOWN IN PHOTO CA-216-17. VIEW TO SOUTHEAST. - Tule River Hydroelectric Project, Water Conveyance System, Middle Fork Tule River, Springville, Tulare County, CA

240

Exterior, looking west, Equipment Building to left, Tower at center, ...  

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

Exterior, looking west, Equipment Building to left, Tower at center, Civil Engineering Storage Building (Building 5765) at left - Beale Air Force Base, Perimeter Acquisition Vehicle Entry Phased-Array Warning System, Microwave Equipment Building, End of Spencer Paul Road, north of Warren Shingle Road (14th Street), Marysville, Yuba County, CA

241

34. EXTERIOR, VIEW OF QUARTERROUND ENCLOSURE AND ENTRANCE TO THE ...  

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

34. EXTERIOR, VIEW OF QUARTER-ROUND ENCLOSURE AND ENTRANCE TO THE BUTLER'S PANTRY ON THE WEST (REAR) ELEVATION FROM THE SOUTH, WITH SCALE - Mark Twain House, 351 Farmington Avenue (corrected from original address of 531 Farmington Avenue), Hartford, Hartford County, CT

242

35. EXTERIOR, VIEW OF QUARTERROUND ENCLOSURE AND ENTRANCE TO THE ...  

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

35. EXTERIOR, VIEW OF QUARTER-ROUND ENCLOSURE AND ENTRANCE TO THE BUTLER'S PANTRY ON THE WEST (REAR) ELEVATION FROM THE SOUTH, WITHOUT SCALE - Mark Twain House, 351 Farmington Avenue (corrected from original address of 531 Farmington Avenue), Hartford, Hartford County, CT

243

42. EXTERIOR, DETAIL VIEW OF SLATE SHINGLES ON ROOF AND ...  

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

42. EXTERIOR, DETAIL VIEW OF SLATE SHINGLES ON ROOF AND JIG-SAWED FRET WORK SKIRTING FROM THE INSIDE OF THE TEXAS DECK (PORCH) - Mark Twain House, 351 Farmington Avenue (corrected from original address of 531 Farmington Avenue), Hartford, Hartford County, CT

244

22. EXTERIOR, VIEW OF THE PORTECOCHERE FROM THE NORTH WITH ...  

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

22. EXTERIOR, VIEW OF THE PORTE-COCHERE FROM THE NORTH WITH THE MARK TWAIN CARRIAGE HOUSE (HABS No. CT-365-A) IN THE BACKGROUND - Mark Twain House, 351 Farmington Avenue (corrected from original address of 531 Farmington Avenue), Hartford, Hartford County, CT

245

2. Exterior view of instrumentation and gauge panels on southeast ...  

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

2. Exterior view of instrumentation and gauge panels on southeast wall of Signal Transfer Building (T-28A). The piping and tubing visibile in the photograph extends from the structure to the Systems Integration Laboratory Building (T-28) and other structures in the complex. - Air Force Plant PJKS, Systems Integration Laboratory, Signal Transfer Building, Waterton Canyon Road & Colorado Highway 121, Lakewood, Jefferson County, CO

246

EXTERIOR PERSPECTIVE OF GRANARY WITH DRIVE, LOOKING SOUTH. (In compliance ...  

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

EXTERIOR PERSPECTIVE OF GRANARY WITH DRIVE, LOOKING SOUTH. (In compliance with the Secretary of the Interior?s Standards, the main façade of the granary was left unaltered in 1998, when the Smith family converted the granary into a family home.) - Smith Farm, Granary, 399 Ebey Road, Coupeville, Island County, WA

247

1. EXTERIOR VIEW, LOOKING SOUTHEAST, SHOWING FLIGHT TEST HANGARS IN ...  

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

1. EXTERIOR VIEW, LOOKING SOUTHEAST, SHOWING FLIGHT TEST HANGARS IN CENTER, BUILDING 7 ON LEFT, AND BUILDING 8 ON RIGHT. - Wright-Patterson Air Force Base, Area B, Building 1/9, Flight Test Hangars, On flightline between Ninth & Tenth Streets, Dayton, Montgomery County, OH

248

Exterior and interior detail of front entry, east side, facing ...  

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

Exterior and interior detail of front entry, east side, facing west-northwest; with lancet arched door frame stairs to choir robing loft, and stained glass windows. - Mare Island Naval Shipyard, St. Peter's Chapel, Walnut Street & Cedar Parkway, Vallejo, Solano County, CA

249

Exterior direct view of (nonoriginal), solar heating panels, and top ...  

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

Exterior direct view of (non-original), solar heating panels, and top of typical rectangular trash-dump tower at roof of Building 6, looking north - North Beach Place, 401 Bay Street, 500 Francisco Street, 401 Bay Street, 500 Francisco Street, San Francisco, San Francisco County, CA

250

DETAIL OF THE EXTERIOR WALL OF THE RECREATION CENTER. NOTE ...  

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

DETAIL OF THE EXTERIOR WALL OF THE RECREATION CENTER. NOTE THE CONCRETE SLAB WITH ORIGINAL GREEN-STAINED FINISH, OCTAGONAL CAST CONCRETE COLUMN SUPPORTING 6" X 12" BEAM AND TAPERED RAFTERS. VIEW FACING NORTH - U.S. Naval Base, Pearl Harbor, Bloch Recreation Center & Arena, Between Center Drive & North Road near Nimitz Gate, Pearl City, Honolulu County, HI

251

52. NORTHEASTERN EXTERIOR VIEW OF DOOROLIVER WAST WATER TREATMENT THICKENER ...  

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

52. NORTHEASTERN EXTERIOR VIEW OF DOOR-OLIVER WAST WATER TREATMENT THICKENER No. 1. ELECTRIC POWERHOUSE No. 2 AND BLOW ENGINE HOUSE No. 3 IS IN THE BACKGROUND. (Jet Lowe) - U.S. Steel Duquesne Works, Blast Furnace Plant, Along Monongahela River, Duquesne, Allegheny County, PA

252

ROBUST EXTRACTION OF EXTERIOR BUILDING BOUNDARIES FROM TOPOGRAPHIC LIDAR DATA  

E-print Network

ROBUST EXTRACTION OF EXTERIOR BUILDING BOUNDARIES FROM TOPOGRAPHIC LIDAR DATA Stephen R. Lach a for generating accurate building models from lidar data have received considerable attention in the recent airborne lidar datasets are collected from near-nadir orientations, there are usually very few data points

Kerekes, John

253

7. HOUSE SOUTH SIDE EXTERIOR SHOWING ENCLOSED SLEEPING PORCH AND ...  

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

7. HOUSE SOUTH SIDE EXTERIOR SHOWING ENCLOSED SLEEPING PORCH AND CASEMENT WINDOW INTO ATTIC AT PEAK OF GABLE. VIEW TO NORTH. - Big Creek Hydroelectric System, Big Creek Town, Operator House, Orchard Avenue south of Huntington Lake Road, Big Creek, Fresno County, CA

254

6. SOUTH EXTERIOR SIDE SHOWING TRIANGULAR KNEE BRACE SUPPORTS AND ...  

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

6. SOUTH EXTERIOR SIDE SHOWING TRIANGULAR KNEE BRACE SUPPORTS AND ENCLOSED PORCH SCREENED WINDOWS. ON BASIC FLOOR-PLAN FOR THE SIX-ROOM HOUSE THIS END WAS THE FRONT ENTRANCE. VIEW TO NORTH. - Big Creek Hydroelectric System, Powerhouse 8, Operator Cottage, Big Creek, Big Creek, Fresno County, CA

255

14. DETAIL EXTERIOR VIEW LOOKING WEST, SHOWING TRANSFORMER UNITS ON ...  

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

14. DETAIL EXTERIOR VIEW LOOKING WEST, SHOWING TRANSFORMER UNITS ON THE UPSTREAM SIDE OF POWERHOUSE #1; THE THREE TRANSFORMERS SHOWN WORK IN CONCERT WITH ONE ANOTHER TO RAISE THE VOLTAGE OF THREE-PHASE ALTERNATING CURRENT PRODUCED BY THE GENERATORS. - Bonneville Project, Powerhouse No.1, Spanning Bradford Slough, from Bradford Island, Bonneville, Multnomah County, OR

256

5. EXTERIOR OF TRIPLEX COTTAGE ROOF SHOWING MANVILLE COMPOSITION SHINGLES, ...  

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

5. EXTERIOR OF TRIPLEX COTTAGE ROOF SHOWING MANVILLE COMPOSITION SHINGLES, POURED CONCRETE CHIMNEYS, AND TRANSLUCENT PLASTIC COVERING OVER WALKWAY AT REAR OF HOUSE (PHOTO LEFT). VIEW TO NORTHWEST. - Lee Vining Creek Hydroelectric System, Triplex Cottage, Lee Vining Creek, Lee Vining, Mono County, CA

257

EXTERIOR VIEW, FRONT (NORTH) ELEVATION. THIS THREESTORY BRICK BUILDING WITH ...  

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

EXTERIOR VIEW, FRONT (NORTH) ELEVATION. THIS THREE-STORY BRICK BUILDING WITH DEEPLY-BRACKETED AND OVERHANGING EAVES INCLUDES MULTIPLE BAYS CONSTRUCTED BEGINNING IN 1913 TO SERVE AS A 'CIVIC CENTER' FOR ACIPCO EMPLOYEES AND THEIR FAMILIES. THE BUILDING CURRENTLY INCLUDES THE TIME OFFICE, CAFETERIA, AND AUDITORIUM. - American Cast Iron Pipe Company, Service Building, 1501 Thirty-first Avenue North, Birmingham, Jefferson County, AL

258

2. EXTERIOR VIEW, LOOKING NORTHEAST FROM THE CUPOLA (RIGHT) TO ...  

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

2. EXTERIOR VIEW, LOOKING NORTHEAST FROM THE CUPOLA (RIGHT) TO COKE BIN (LEFT), OF RAW MATERIALS YARD. FOUNDRY IRON IS FROM SCRAP, NOT BASIC ORE. RAW MATERIALS ASSEMBLED, IN PILES, FOR SMELTING ARE AUTOMOTIVE SCRAP (CENTER), STRUCTURAL STEEL AND RAILROAD RAIL (RIGHT) AND LIMESTONE (LEFT). - Stockham Pipe & Fittings Company, Grey Iron Foundry, 4000 Tenth Avenue North, Birmingham, Jefferson County, AL

259

1. EXTERIOR OF BUILDING 125 FROM MAIN PLANT 4 RESIDENTIAL ...  

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

1. EXTERIOR OF BUILDING 125 FROM MAIN PLANT 4 RESIDENTIAL STREET SHOWING BUILDING AT PHOTO RIGHT CENTER (WITH WHITE JEEP PARKED IN FRONT) BETWEEN WORKER COTTAGE (BUILDING 115) AT PHOTO LEFT AND RECREATION HALL (BUILDING 109) AT PHOTO RIGHT. VIEW TO SOUTH. - Bishop Creek Hydroelectric System, Plant 4, Lightning Arrestor Vault, Bishop Creek, Bishop, Inyo County, CA

260

1. Readiness Crew Building exterior, view looking westnorthwest from edge ...  

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

1. Readiness Crew Building exterior, view looking west-northwest from edge of runway. In this photograph, the lower floor tunnel exits can be seen on three sides of the building. Lyon - Whiteman Air Force Base, Bomber Alert Facility S-6, 1300 Alert Road, Knob Noster, Johnson County, MO

261

8. Exterior view, showing tank and associated piping adjacent to ...  

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

8. Exterior view, showing tank and associated piping adjacent to Test Cell 6, Systems Integration Laboratory Building (T-28), looking south. - Air Force Plant PJKS, Systems Integration Laboratory, Systems Integration Laboratory Building, Waterton Canyon Road & Colorado Highway 121, Lakewood, Jefferson County, CO

262

6. Exterior view, showing structural details and instrumentation at the ...  

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

6. Exterior view, showing structural details and instrumentation at the walk-in entry level (bottom) of Test Cell 6, Systems Integration Laboratory Building (T-28), looking southwest. - Air Force Plant PJKS, Systems Integration Laboratory, Systems Integration Laboratory Building, Waterton Canyon Road & Colorado Highway 121, Lakewood, Jefferson County, CO

263

12. Exterior view, showing tank and piping associated with Test ...  

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

12. Exterior view, showing tank and piping associated with Test Cell 7, Systems Integration Laboratory Building (T-28), looking west. - Air Force Plant PJKS, Systems Integration Laboratory, Systems Integration Laboratory Building, Waterton Canyon Road & Colorado Highway 121, Lakewood, Jefferson County, CO

264

10. Exterior view, showing the structural details and tanks above ...  

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

10. Exterior view, showing the structural details and tanks above at walk-in entry level (bottom) of Test Cell 7, Systems Integration Laboratory Building (T-28), looking west. - Air Force Plant PJKS, Systems Integration Laboratory, Systems Integration Laboratory Building, Waterton Canyon Road & Colorado Highway 121, Lakewood, Jefferson County, CO

265

7. Exterior view, showing instrumentation and gauge panel at the ...  

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

7. Exterior view, showing instrumentation and gauge panel at the walk-in entry level (bottom) of Test Cell 6, Systems Integration Laboratory Building (T-28), looking west. - Air Force Plant PJKS, Systems Integration Laboratory, Systems Integration Laboratory Building, Waterton Canyon Road & Colorado Highway 121, Lakewood, Jefferson County, CO

266

9. Exterior view, Test Cell 7, Systems Integration Laboratory Building ...  

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

9. Exterior view, Test Cell 7, Systems Integration Laboratory Building (T-28), looking southwest. The enclosure discussed in CO-88-B-8 is at the right. - Air Force Plant PJKS, Systems Integration Laboratory, Systems Integration Laboratory Building, Waterton Canyon Road & Colorado Highway 121, Lakewood, Jefferson County, CO

267

EXTERIOR VIEW, LOOKING WEST, AT FORMER TCIUS STEEL COMPANY BEE ...  

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

EXTERIOR VIEW, LOOKING WEST, AT FORMER TCI-US STEEL COMPANY BEE HIVE OVEN RUINS WITH FORESTED OVERGROWTH. - Pratt Coal & Coke Company, Pratt Mines, Coke Ovens & Railroad, Bounded by First Street, Avenue G, Third Place, Birmingham Southern Railroad, Birmingham, Jefferson County, AL

268

Exterior with Technical Equipment Building (Building 5760) in background left, ...  

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

Exterior with Technical Equipment Building (Building 5760) in background left, looking west - Beale Air Force Base, Perimeter Acquisition Vehicle Entry Phased-Array Warning System, Power Plant, End of Spencer Paul Road, north of Warren Shingle Road (14th Street), Marysville, Yuba County, CA

269

Reverse forearm flap based on an "exteriorized" pedicle.  

PubMed

Soft tissue coverage after multiple digital amputations was achieved with a reverse forearm flap based on an "exteriorized" vascular pedicle. The length of exposed radial artery pedicle was calculated to permit full range of motion of the involved digits before flap division and inset. No complications of the exposed vascular pedicle were noted. PMID:1995675

Olding, M

1991-01-01

270

MSTER EN COMERCIO EXTERIOR 2012-2013 FECHAS Y HORARIOS  

E-print Network

situación del comercio internacional, que le facilite el análisis de las diferentes particularidades del enMÁSTER EN COMERCIO EXTERIOR 2012-2013 7ª Edición MÁSTER #12;OBJETIVOS DIRIGIDO A DURACIÓN FECHAS Y- torno internacional de los negocios. Se analizará y estudiará en profundidad el mercado internacional y

Rey Juan Carlos, Universidad

271

1. EXTERIOR VIEW, LOOKING WEST, OF CAST IRON FENCE AND ...  

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

1. EXTERIOR VIEW, LOOKING WEST, OF CAST IRON FENCE AND MARBLE MONUMENTS IN THIS GRAVE PLOT IN THE COLUMBIANA CEMETERY WHICH DATE TO 1864. IRON WORK MANUFACTURED AT SHELBY IRONWORKS FOR IRONMASTER'S FIRST WIFE AND DAUGHTER'S GRAVES. - Ware Cemetery Plot, Shelby County Road 25, Columbiana, Shelby County, AL

272

89. Photographic copy of exterior photograph, section, profile and plan ...  

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

89. Photographic copy of exterior photograph, section, profile and plan of Northwestern Consolidated Elevator A originally published in Plans of Grain Elevators (Chicago: Grain Dealers Journal, 1918), p. 52. VIEW OF NORTH AND WEST SIDES OF NORTHWESTERN CONSOLIDATED ELEVATOR A; SECTION AND PROFILE; PLAN OF RECEIVING SINKS - Northwestern Consolidated Elevator "A", 119 Fifth Avenue South, Minneapolis, Hennepin County, MN

273

Exterior building details of Building A; north façade: two threelight ...  

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

Exterior building details of Building A; north façade: two three-light wood casement windows flank a three-light fixed wood window with concrete sill; southerly view - San Quentin State Prison, Building 22, Point San Quentin, San Quentin, Marin County, CA

274

Development and characterization of a wake-controlled exterior hood.  

PubMed

A wake-controlled exterior hood was developed to overcome the negative influence of cross draft on an exterior hood and avoid the operation inconvenience caused by the enclosure of an airflow capture booth. This new type of local exterior hood used the hood suction flow to stabilize the dynamic vortex shedding that was induced when a crossflow passed over a blockage plate, and therefore formed a hydrodynamics-stabilized local isolation area for efficient removing of the contaminant. The development process was performed in a test section of an open-circuit wind tunnel. The blockage plate and the exterior hood model were placed in a wind-tunnel test section so that the crossflow could be freely supplied by the airstream of the wind tunnel. The laser light sheet flow visualization method and the laser Doppler velocimeter were employed to reveal the characteristics of the flow field. Primary influential parameters were factored out of the measured velocity results so that a design procedure was proposed. Experiments using hot-wire type alcohol sensors to measure the toluene vapor concentration distributions showed that the capture efficiency of this type of actively controlled hood was remarkably higher than that of an uncontrolled hood. PMID:15742706

Huang, Rong Fung; Liu, Gene Shin; Lin, Shin Yi; Chen, Yu-Kang; Wang, Shun-Chih; Peng, Chiung-Yu; Yeh, Wen-Yu; Chen, Chun-Wann; Chang, Cheng-Ping

2004-12-01

275

6. VIEW OF BUILDING 371 EXTERIOR WALL CONSTRUCTION DETAIL. BUILDING ...  

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

6. VIEW OF BUILDING 371 EXTERIOR WALL CONSTRUCTION DETAIL. BUILDING CONSTRUCTION WAS HARDENED TO WITHSTAND THE FORCES IMPOSED BY A DESIGN-BASIS EARTHQUAKE OR TORNADO. (7/1/74) - Rocky Flats Plant, Plutonium Recovery Facility, Northwest portion of Rocky Flats Plant, Golden, Jefferson County, CO

276

9. EXTERIOR VIEW OF BALTIMORE FAN HOUSE LOOKING NORTHEAST The ...  

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

9. EXTERIOR VIEW OF BALTIMORE FAN HOUSE LOOKING NORTHEAST The brick and concrete construction of the engine room, airways, and chimney are evident. The shaft housing and flywheel of the Allis- Chalmers Corliss steam engine are visible through the window of the engine room. - Dorrance Colliery Fan Complex, South side of Susquehanna River at Route 115 & Riechard Street, Wilkes-Barre, Luzerne County, PA

277

6. FACING NORTHWEST. EXTERIOR OF WHITEPAINTED 1859 BRICK PICKER HOUSE ...  

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

6. FACING NORTHWEST. EXTERIOR OF WHITE-PAINTED 1859 BRICK PICKER HOUSE WITH MILL NO. 1 IN BACKGROUND. PARK FOUNTAIN IN FOREGROUND WITH BUST OF DANIEL PRATT BY ARTIST TOMMY BROWN. - Prattville Manufacturing Company, Number One, 242 South Court Street, Prattville, Autauga County, AL

278

52. EXTERIOR DETAIL VIEW OF A SPARE DRUM FOR A ...  

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

52. EXTERIOR DETAIL VIEW OF A SPARE DRUM FOR A FRENIER PUMP. THE CHARCOAL HOUSE IS IN THE BACKGROUND AND THE DRUM LEANING AGAINST THE EAST SIDE OF THE MILL ANNEX. NOTE THE WELDS IN THE DRUM, THEY DELINEATE THE SPIRAL LEADING TO THE CENTER OF THE DRUM. - Standard Gold Mill, East of Bodie Creek, Northeast of Bodie, Bodie, Mono County, CA

279

5. Exterior detail of connector and boiler room (Constructed after ...  

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

5. Exterior detail of connector and boiler room (Constructed after 1953); Connector links east wing (Known as A-130 prior to 1953) & west wing (Known as A-129 prior to 1953) - Advance Base Depot, Davisville, Building A-130, Northeast section of Advance Base Depot, adjacent to Pier No. 1, Davisville, Washington County, RI

280

Planetary Rings  

NASA Technical Reports Server (NTRS)

Just over two decades ago, Jim Pollack made a critical contribution to our understanding of planetary ring particle properties, and resolved a major apparent paradox between radar reflection and radio emission observations. At the time, particle properties were about all there were to study about planetary rings, and the fundamental questions were, why is Saturn the only planet with rings, how big are the particles, and what are they made of? Since then, we have received an avalanche of observations of planetary ring systems, both from spacecraft and from Earth. Meanwhile, we have seen steady progress in our understanding of the myriad ways in which gravity, fluid and statistical mechanics, and electromagnetism can combine to shape the distribution of the submicron-to-several-meter size particles which comprise ring systems into the complex webs of structure that we now know them to display. Insights gained from studies of these giant dynamical analogs have carried over into improved understanding of the formation of the planets themselves from particle disks, a subject very close to Jim's heart. The now-complete reconnaissance of the gas giant planets by spacecraft has revealed that ring systems are invariably found in association with families of regular satellites, and there is ark emerging perspective that they are not only physically but causally linked. There is also mounting evidence that many features or aspects of all planetary ring systems, if not the ring systems themselves, are considerably younger than the solar system

Cuzzi, Jeffrey N.

1994-01-01

281

Ring Detectives  

NSDL National Science Digital Library

This lesson will help students understand what Gulf Stream rings are and why are they significant. Students will describe the overall flow of the Gulf Stream, explain how it affects biological communities in the North Atlantic Ocean, and describe Gulf Stream rings and how they are formed. They will also compare and contrast warm-core rings and cold-core rings and explain how Gulf Stream rings may affect biological communities on the edge and slope of the continental shelf adjacent to the coasts of North and South Carolina. This hands-on activity uses online data resources and includes: focus questions, learning objectives, teaching time, background information, learning procedures, extensions, and resources and student handouts.

282

46 CFR 32.56-20 - Insulation of exterior boundaries: Superstructures and deckhouses-T/ALL.  

Code of Federal Regulations, 2012 CFR

... Shipping 1 2012-10-01 2012-10-01 false Insulation of exterior boundaries: Superstructures and deckhouses-T...Laying Date On or After January 1, 1975 § 32.56-20 Insulation of exterior boundaries: Superstructures and...

2012-10-01

283

46 CFR 32.56-20 - Insulation of exterior boundaries: Superstructures and deckhouses-T/ALL.  

Code of Federal Regulations, 2010 CFR

... Shipping 1 2010-10-01 2010-10-01 false Insulation of exterior boundaries: Superstructures and deckhouses-T...Laying Date On or After January 1, 1975 § 32.56-20 Insulation of exterior boundaries: Superstructures and...

2010-10-01

284

46 CFR 32.56-20 - Insulation of exterior boundaries: Superstructures and deckhouses-T/ALL.  

Code of Federal Regulations, 2013 CFR

... Shipping 1 2013-10-01 2013-10-01 false Insulation of exterior boundaries: Superstructures and deckhouses-T...Laying Date On or After January 1, 1975 § 32.56-20 Insulation of exterior boundaries: Superstructures and...

2013-10-01

285

46 CFR 32.56-20 - Insulation of exterior boundaries: Superstructures and deckhouses-T/ALL.  

Code of Federal Regulations, 2011 CFR

... Shipping 1 2011-10-01 2011-10-01 false Insulation of exterior boundaries: Superstructures and deckhouses-T...Laying Date On or After January 1, 1975 § 32.56-20 Insulation of exterior boundaries: Superstructures and...

2011-10-01

286

46 CFR 32.56-20 - Insulation of exterior boundaries: Superstructures and deckhouses-T/ALL.  

Code of Federal Regulations, 2014 CFR

... Shipping 1 2014-10-01 2014-10-01 false Insulation of exterior boundaries: Superstructures and deckhouses-T...Laying Date On or After January 1, 1975 § 32.56-20 Insulation of exterior boundaries: Superstructures and...

2014-10-01

287

24 CFR 200.949 - Building product standards and certification program for exterior insulated steel door systems.  

Code of Federal Regulations, 2014 CFR

...certification program for exterior insulated steel door systems. 200.949 Section 200...certification program for exterior insulated steel door systems. (a) Applicable standards. (1) All Exterior Insulated Steel Door Systems shall be designed,...

2014-04-01

288

24 CFR 200.949 - Building product standards and certification program for exterior insulated steel door systems.  

Code of Federal Regulations, 2013 CFR

...certification program for exterior insulated steel door systems. 200.949 Section 200...certification program for exterior insulated steel door systems. (a) Applicable standards. (1) All Exterior Insulated Steel Door Systems shall be designed,...

2013-04-01

289

24 CFR 200.949 - Building product standards and certification program for exterior insulated steel door systems.  

Code of Federal Regulations, 2011 CFR

...certification program for exterior insulated steel door systems. 200.949 Section 200...certification program for exterior insulated steel door systems. (a) Applicable standards. (1) All Exterior Insulated Steel Door Systems shall be designed,...

2011-04-01

290

24 CFR 200.949 - Building product standards and certification program for exterior insulated steel door systems.  

Code of Federal Regulations, 2012 CFR

...certification program for exterior insulated steel door systems. 200.949 Section 200...certification program for exterior insulated steel door systems. (a) Applicable standards. (1) All Exterior Insulated Steel Door Systems shall be designed,...

2012-04-01

291

Velocity peaks and caustic rings  

E-print Network

The late infall of cold dark matter onto an isolated galaxy produces flows with definite local velocity vectors throughout the galactic halo. It also produces caustic rings, which are places in the halo where the dark matter density is very large. The self-similar model of halo formation predicts that the caustic ring radii $a_n$ follow the approximate law $a_n \\simeq 1/n$. I interpret bumps in the rotation curves of NGC 3198 and of our own galaxy as due to caustic rings of dark matter. In this model of our halo the annual modulation effect in direct searches for WIMPs has the opposite sign from that predicted by the isothermal sphere model.

P. Sikivie

1998-10-19

292

Advanced exterior sensor project : final report, September 2004.  

SciTech Connect

This report (1) summarizes the overall design of the Advanced Exterior Sensor (AES) system to include detailed descriptions of system components, (2) describes the work accomplished throughout FY04 to evaluate the current health of the original prototype and to return it to operation, (3) describes the status of the AES and the AES project as of September 2004, and (4) details activities planned to complete modernization of the system to include development and testing of the second-generation AES prototype.

Ashby, M. Rodema

2004-12-01

293

EXTERIOR VIEW WITH HISTORIC LOCOMOTIVES, COAL AND PASSENGER CARS INCLUDING ...  

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

EXTERIOR VIEW WITH HISTORIC LOCOMOTIVES, COAL AND PASSENGER CARS INCLUDING THE WOODWARD IRON COMPANY NO. 38 LOCOMOTIVE AND TENDER LOCATED IN THE HEART OF DIXIE MUSEUM'S POWELL AVENUE YARD AND SOUTHERN RAILROAD BOXCARS ON ACTIVE TRACKS OF BIRMINGHAM'S RAILROAD RESERVATION. IN BACKGROUND AT RIGHT AND CENTER IS THE BIRMINGHAM CITY CENTER. - Heart of Dixie Railroad, Rolling Stock, 1800 Block Powell Avenue, Birmingham, Jefferson County, AL

294

Exterior building details of Building A; west façade: white painted ...  

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

Exterior building details of Building A; west façade: white painted brick wall of road and second level, road level: paired four-light casement window and a small single-light wood casement window; second level: four-over-four wood double-hung window and a six-light horizontal pivot over a three-light fixed window; easterly view - San Quentin State Prison, Building 22, Point San Quentin, San Quentin, Marin County, CA

295

2. EXTERIOR FRONT (SOUTHEAST) SIDE OF BUILDING 117 SHOWING MAIN ...  

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

2. EXTERIOR FRONT (SOUTHEAST) SIDE OF BUILDING 117 SHOWING MAIN RESIDENTIAL STREET IN LOWER FOREGROUND, CEMENT-LAID ROCK RETAINING WALL IN FRONT OF HOUSE, AND CONCRETE STEPS AND WALKWAY TO FRONT PORCH AND DOOR. NOTE SLIDING GLASS DOOR REPLACEMENT FOR ORIGINAL DOOR WHICH HAS SUBSEQUENTLY BEEN REMODELED BACK TO A SINGLE ENTRY DOOR. VIEW TO NORTHWEST. - Bishop Creek Hydroelectric System, Plant 4, Worker Cottage, Bishop Creek, Bishop, Inyo County, CA

296

1. EXTERIOR VIEW OF 209 WARE STREET LOOKING SOUTH. THIS ...  

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

1. EXTERIOR VIEW OF 209 WARE STREET LOOKING SOUTH. THIS STRUCTURE WAS ONE OF APPROXIMATELY SEVENTEEN DUPLEXES BUILT AS THE ORIGINAL WORKER HOUSING FOR THE LaGRANGE COTTON MILLS, LATER KNOWN AS CALUMET MILL. LaGRANGE MILLS (1888-89) WAS THE FIRST COTTON MILL IN LaGRANGE. NOTE THE GABLE-ON-HIP ROOF FORM AND TWO IDENTICAL STRUCTURES VISIBLE TO THE LEFT. - 209 Ware Street (House), 209 Ware Street, La Grange, Troup County, GA

297

1. EXTERIOR VIEW OF ELM CITY PLANT (A. FRANCIS WALKER, ...  

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

1. EXTERIOR VIEW OF ELM CITY PLANT (A. FRANCIS WALKER, 1905-07) FROM SECOND AVENUE ON OPPOSITE SIDE OF ENTRANCE. THIS STRUCTURE WAS ORIGINALLY BUILT AS THE ELM CITY COTTON MILL OF CALLAWAY MILLS. NOTE RESERVOIR IN FOREGROUND. THIS PHOTOGRAPH IS THE LEFT SIDE OF A PANORAMA VIEW THAT INCLUDES HAER Nos. GA-128-2 AND GA-128-3. - Elm City Cotton Mill, 1000 Elm Street, La Grange, Troup County, GA

298

Exterior building details of Building B, east façade: embedded wood ...  

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

Exterior building details of Building B, east façade: embedded wood beams and interrupted dentil course cornice resulting from the removal of the third floor tuberculosis ward, yard level paneled Dutch door, second level two a typical six-light wood casement windows over a single-panel wood door with four light exits to fire escape; westerly view - San Quentin State Prison, Building 22, Point San Quentin, San Quentin, Marin County, CA

299

Spray Foam Exterior Insulation with Stand-Off Furring  

SciTech Connect

IBACOS, in collaboration with GreenHomes America, was contracted by the New York State Energy Research and Development Authority to research exterior wall insulation solutions. This research investigated cost-effective deep energy retrofit (DER) solutions for improving the building shell exterior while achieving a cost-reduction goal, including reduced labor costs to reach a 50/50 split between material and labor. The strategies included exterior wall insulation plus energy upgrades as needed in the attic, mechanical and ventilation systems, and basement band joist, walls, and floors. The work can be integrated with other home improvements such as siding or window replacement. This strategy minimizes physical connections to existing wall studs, encapsulates existing siding materials (including lead paint) with spray foam, and creates a vented rain screen assembly to promote drying. GreenHomes America applied construction details created by IBACOS to a test home. 2x4 framing members were attached to the wall at band joists and top plates using 'L' clips, with spray foam insulating the wall after framing was installed. Windows were installed simultaneously with the framing, including extension jambs. The use of clips in specific areas provided the best strength potential, and 'picture framing' the spray foam held the 2x4s in place. Short-term testing was performed at this house, with monitoring equipment installed for long-term testing. Testing measurements will be provided in a later report, as well as utility impact (before and after), costs (labor and materials), construction time, standard specifications, and analysis for the exterior wall insulation strategy.

Herk, A.; Baker, R.; Prahl, D.

2014-03-01

300

Exterior view of south and east walls of Oxidizer Conditioning ...  

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

Exterior view of south and east walls of Oxidizer Conditioning Structure (T-28D), looking northwest. This structure was designed to condition nitrogen tetroxide, the oxidizer used in the Titan II's fuel system, to specified temperatures. The taller structure to the rear is the Long-Term Oxidizer Silo (T-28B) - Air Force Plant PJKS, Systems Integration Laboratory, Oxidizer Conditioning Structure, Waterton Canyon Road & Colorado Highway 121, Lakewood, Jefferson County, CO

301

2. EXTERIOR OF RUSIN HALL, THE ONLY STRUCTURE TO PREDATED ...  

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

2. EXTERIOR OF RUSIN HALL, THE ONLY STRUCTURE TO PRE-DATED THE WORLD WAR II EXPANSION THAT LED TO THE DEMOLITION OF THE FIRST WARD OF HOMESTEAD, AN AREA KNOWN AS BELOW THE TRACKS. THE BUILDING WAS ORIGINALLY BUILT AS A FRATERNAL HALL FOR RUTHENIAN IMMIGRANTS BY THE RUSSKY-NARODNY-DOM, INC. - U.S. Steel Homestead Works, Auxiliary Buildings & Shops, Along Monongahela River, Homestead, Allegheny County, PA

302

88. ARAIII. "Petrochem" heater is hoisted over south exterior wall ...  

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

88. ARA-III. "Petro-chem" heater is hoisted over south exterior wall of heater pit in GCRE reactor building (ARA-608). Printing on heater says, "Petro-chem iso-flow furnace; American industrial fabrications, inc." Camera facing north. January 7, 1959. Ineel photo no. 529-124. Photographer: Ken Mansfield. - Idaho National Engineering Laboratory, Army Reactors Experimental Area, Scoville, Butte County, ID

303

26. Generator Voltage Regulator Cabinet Exterior for Unit 1, view ...  

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

26. Generator Voltage Regulator Cabinet Exterior for Unit 1, view to the northwest. The exciter supplies the DC current to the generator rotor to create electricity. Each of the four original units has an exciter identical to this one, and all are scheduled for replacement. - Washington Water Power Clark Fork River Noxon Rapids Hydroelectric Development, Powerhouse, South bank of Clark Fork River at Noxon Rapids, Noxon, Sanders County, MT

304

12. EXTERIOR VIEW OF NEW FAN HOUSE LOOKING WEST The ...  

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

12. EXTERIOR VIEW OF NEW FAN HOUSE LOOKING WEST The engine room with the cylinder head of the Corliss steam visible through the open door is on the left (south). The metal updraft chimney is in the center and part of the airway, with a door leading into an airlock, is on the right. - Dorrance Colliery Fan Complex, South side of Susquehanna River at Route 115 & Riechard Street, Wilkes-Barre, Luzerne County, PA

305

8. EXTERIOR VIEW OF BALTIMORE FAN HOUSE LOOKING NORTHEAST The ...  

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

8. EXTERIOR VIEW OF BALTIMORE FAN HOUSE LOOKING NORTHEAST The engine room and south airway are in the foreground. The brick walls covering the fan housing and brick upshaft chimney are in the background. The engine room, fan housing, and airways are covered with reinforced concrete roofing. In the left foreground is an airlock leading into the airway. - Dorrance Colliery Fan Complex, South side of Susquehanna River at Route 115 & Riechard Street, Wilkes-Barre, Luzerne County, PA

306

2. EXTERIOR VIEW OF NEW FAN HOUSE AND HILLMAN FAN ...  

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

2. EXTERIOR VIEW OF NEW FAN HOUSE AND HILLMAN FAN HOUSE LOOKING NORTHEAST The New Fan House is in the foreground; the metal fan housing and updraft chimney are attached to the north side. The Hillman Fan House is in the background; the brick airway, fan housing, and updraft chimney are visible. - Dorrance Colliery Fan Complex, South side of Susquehanna River at Route 115 & Riechard Street, Wilkes-Barre, Luzerne County, PA

307

Covariant Star Product for Exterior Differential Forms on Symplectic Manifolds  

E-print Network

After a brief description of the $\\mathbb{Z}$-graded differential Poisson algebra, we introduce a covariant star product for exterior differential forms and give an explicit expression for it up to second order in the deformation parameter $\\hbar$, in the case of symplectic manifolds. The graded differential Poisson algebra endows the manifold with a connection, not necessarily torsion-free, and places upon the connection various constraints.

Shannon McCurdy; Bruno Zumino

2009-10-02

308

Cladding Attachment Over Thick Exterior Insulating Sheathing (Fact Sheet)  

SciTech Connect

The addition of insulation to the exterior of buildings is an effective means of increasing the thermal resistance of wood-framed walls and mass masonry wall assemblies. The location of the insulation on the exterior of the structure has many direct benefits, including better effective R-value from reduced thermal bridging, better condensation resistance, reduced thermal stress on the structure, as well as other commonly associated improvements such as increased airtightness and improved water management. For thick layers of exterior insulation (more than 1.5 in.), the use of wood furring strips attached through the insulation back to the structure has been used by many contractors and designers as a means to provide a convenient cladding attachment location. Although the approach has proven effective, there is significant resistance to its widespread implementation due to a lack of research and understanding of the mechanisms involved in the development of the vertical displacement resistance capacity. In addition, the long-term in-service performance of the system has been questioned due to potential creep effects of the assembly under the sustained dead load of the cladding and effects of varying environmental conditions. In addition, the current International Building Code (IBC) and International Residential Code (IRC) do not have a provision that specifically allows this assembly.

Not Available

2013-11-01

309

Staining potential of sealants in/on exterior wall substrates  

SciTech Connect

The investigation of dozens of exterior walls on buildings by the authors have revealed that certain sealants used to seal joints in exterior walls have caused the following conditions: 1. Local staining and discoloration of masonry wall substrates due to penetration of sealant into substrates. 2. Local change in absorption of masonry wall substrates due to penetration of sealant into the substrates which results in local discoloration of wall substrates after rains. 3. Surface discoloration of sealant due to dirt accumulation on sealant. 4. Stains in the form of streaks of direct on masonry and on metal wall substrates due to transfer by rain water of some of the dirt on the sealant surface onto the adjacent surface of the substrate. Laboratory and field testing of the major commercially available sealants by the authors to date have revealed that silicone sealants have the propensity to stain certain exterior wall substrates while polyurethane sealants do not; that silicone sealants in service discolor more significantly and faster due to dirt accumulation than polyurethane sealants; that sealant that has penetrated into masonry substrates cannot be entirely removed from the substrate by cleaning; and that preconstruction testing of sealants and proper material selection can help to avoid staining of sealant.

Chin, I.R.; Gorrell, T.A.; Scheffler, M.J. [Wiss, Janney, Elstner Associates, Inc., Chicago, IL (United States)

1996-12-31

310

The Galactic Habitable Zone: Galactic Chemical Evolution  

Microsoft Academic Search

We propose the concept of a “Galactic Habitable Zone” (GHZ). Analogous to the Circumstellar Habitable Zone (CHZ), the GHZ is that region in the Milky Way where an Earth-like planet can retain liquid water on its surface and provide a long-term habitat for animal-like aerobic life. In this paper we examine the dependence of the GHZ on Galactic chemical evolution.

Guillermo Gonzalez; Donald Brownlee; Peter Ward

2001-01-01

311

Ring accelerators  

SciTech Connect

We present two-dimensional simulations in (r-z) and r-theta) cylinderical geometries of imploding-liner-driven accelerators of rings of charged particles. We address issues of azimuthal and longitudinal stability of the rings. We discuss self-trapping designs in which beam injection and extraction is aided by means of external cusp fields. Our simulations are done with the 2-1/2-D particle-in-cell plasma simulation code CLINER, which combines collisionless, electromagnetic PIC capabilities with a quasi-MHD finite element package.

Gisler, G.; Faehl, R.

1983-01-01

312

Reduction of exterior differential systems for ordinary variational problems  

NASA Astrophysics Data System (ADS)

This paper deals with the reduction of ordinary variational problems with Abelian and non-Abelian symmetry groups. It differs from the existing results on geometric reduction in the approach that is completely Lagrangian and based on exterior differential systems. In this setting, two procedures of reduction come out naturally: the first one is the Lagrangian analog of the Marsden-Weinstein reduction holding in the symplectic case and the other one, especially in the non-Abelian case, comes out naturally in our setting.

Morando, P.; Sammarco, S.

2012-02-01

313

General view of the exterior of the Vehicle Assembly Building ...  

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

General view of the exterior of the Vehicle Assembly Building (VAB) at the Kennedy Space Center. The view is of the two Solid Rocket Boosters stacked and assembled on the Mobile Launch Platform (MLP) passing through the sliding doors of the VAB. Note in the approximate lower quarter of the image, toward the right-had side, on the MLP there is a person standing to give a sense of scale. - Space Transportation System, Orbiter Discovery (OV-103), Lyndon B. Johnson Space Center, 2101 NASA Parkway, Houston, Harris County, TX

314

EXTERIOR VIEW, LOOKING EAST, OF REDUCTION PLANT NO. 6 WITH ...  

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

EXTERIOR VIEW, LOOKING EAST, OF REDUCTION PLANT NO. 6 WITH PRIMARY AND SECONDARY LIMESTONE REDUCTION ('CRUSHING') IN PROGRESS. FEEDER (RIGHT) FEEDS TO CONVEYOR BELTS (CENTER) AND CRUSHER (LEFT). LIMESTONE PROCESSED THROUGH THIS OPERATION IS FURTHER SCREENED AND PROCESSED AT ANOTHER PLANT ON THE THOMAS SITE. OPERATION OF THIS PLANT, WHICH BEGAN IN 1960, INCORPORATES WITHIN THE FEEDER A CONCRETE RETAINING WALL DATING TO A TURN OF THE CENTURY QUARRY OPERATION FORMERLY ON THIS SITE. - Wade Sand & Gravel Company, Reduction Plant No. 6, State Route 78, Thomas, Jefferson County, AL

315

1. EXTERIOR VIEW OF MILL WORKER HOUSE AT 107 GREEN ...  

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

1. EXTERIOR VIEW OF MILL WORKER HOUSE AT 107 GREEN STREET HOUSE IS A WOOD-FRAME DUPLEX WITH A PYRAMIDAL ROOF, KITCHEN ELL IN REAR, AND A PORCH EXTENDING FROM THE FRONT. NOTE 105 GREEN STREET TO RIGHT. THESE DWELLINGS WERE CONSTRUCTED BY HOGANSVILLE MANUFACTURING COMPANY c. 1900. THE MILL WAS LOCATED ON THE OTHER SIDE OF GREEN STREET UNTIL IT WAS DEMOLISHED IN THE 1970S. CURRENTLY THE SITE IS AN EMPTY LOT SURROUNDED BY A FENCE. - 107 Green Street (House), 107 Green Street, Hogansville, Troup County, GA

316

EXTERIOR ELEVATIONS. United Engineering Company Ltd., Alameda Shipyard, Ship Repair ...  

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

EXTERIOR ELEVATIONS. United Engineering Company Ltd., Alameda Shipyard, Ship Repair Facilities, Office Building. Includes lettering detail for front elevation. John Hudspeth, Architect, at foot of Main Street, Alameda, Calif. Sheet no. A3 of 8 sheets, Plan no. 10,007. Scale 1/8 inch to the foot. March 18, 1942, last revised 9/21/43. U.S. Navy, Bureau of Yards & Docks, Contract no. bs 76. Approved for construction October 9, 1943. blueprint - United Engineering Company Shipyard, Office Building No. 137, 2900 Main Street, Alameda, Alameda County, CA

317

10. SOUTHEAST EXTERIOR CORNER. During demolition large iron bars were ...  

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

10. SOUTHEAST EXTERIOR CORNER. During demolition large iron bars were found embedded in the south brick walls about 11 courses above the water table. These were possibly used to secure the roof structure of a shed which housed the fire engine of the Relief Fire Company (see Articles of Agreement, 1815, papers of the Central Philadelphia Meeting), which specified that the Engine House was to be situated at the northeast corner of the lot. Perhaps at some later date the shed was moved. - Twelfth Street Meeting House, 20 South Twelfth Street, Philadelphia, Philadelphia County, PA

318

Exterior cloaking with active sources in two dimensional acoustics  

E-print Network

We cloak a region from a known incident wave by surrounding the region with three or more devices that cancel out the field in the cloaked region without significantly radiating waves. Since very little waves reach scatterers within the cloaked region, the scattered field is small and the scatterers are for all practical purposes undetectable. The devices are multipolar point sources that can be determined from Green's formula and an addition theorem for Hankel functions. The cloaking devices are exterior to the cloaked region.

Fernando Guevara Vasquez; Graeme W. Milton; Daniel Onofrei

2010-09-10

319

Exterior view of submarine with survey crew posed in front. ...  

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

Exterior view of submarine with survey crew posed in front. From left to right: Todd Croteau - U.S. National Park Service, Joshua Price - U.S. Navy, Bert Ho - National Oceanic and Atmospheric Administration, Michael McCarthy - Western Australia Maritime Museum, Larry Murphy - U.S. National Park Service, Don Johnson- University of Nebraska Engineering School, James Delgado- Institute for Nautical Archeology, Jacinto Ahmendra - Government of Panama. - Sub Marine Explorer, Located along the beach of Isla San Telmo, Pearl Islands, Isla San Telmo, Former Panama Canal Zone, CZ

320

Accurate boundary conditions for exterior problems in gas dynamics  

NASA Technical Reports Server (NTRS)

The numerical solution of exterior problems is typically accomplished by introducing an artificial, far field boundary and solving the equations on a truncated domain. For hyperbolic systems, boundary conditions at this boundary are often derived by imposing a principle of no reflection. However, waves with spherical symmetry in gas dynamics satisfy equations where incoming and outgoing Riemann variables are coupled. This suggests that natural reflections may be important. A reflecting boundary condition is proposed based on an asymptotic solution of the far field equations. Nonlinear energy estimates are obtained for the truncated problem and numerical experiments presented to validate the theory.

Hagstrom, Thomas; Hariharan, S. I.

1988-01-01

321

1. EXTERIOR VIEW OF NEW FAN HOUSE AND HILLMAN FAN ...  

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

1. EXTERIOR VIEW OF NEW FAN HOUSE AND HILLMAN FAN HOUSE LOOKING NORTHWEST The building on the left, the New Fan House, houses a Corliss steam engine which powered a Buffalo Forge Company single inlet Duplex Conoidal centrifugal exhausted fan through a metal updraft chimney. Part of the brick airway leading to the Baltimore shaft is visible to its right rear. The Hillman Fan House, on the right, houses the 1883 double inlet Guibal fan. The south entry, the curve of the fan housing, and brick updraft chimney are visible in this view. - Dorrance Colliery Fan Complex, South side of Susquehanna River at Route 115 & Riechard Street, Wilkes-Barre, Luzerne County, PA

322

10. EXTERIOR VIEW OF STONE RETAINING WALL, AIRWAY, BALTIMORE FAN ...  

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

10. EXTERIOR VIEW OF STONE RETAINING WALL, AIRWAY, BALTIMORE FAN HOUSE AND HILLMAN FAN HOUSE LOOKING EAST The stone retaining wall encloses a pit which may have been the original site of the Hillman Fan House steam engine. The concrete foundations in the left foreground are more recent (c. 1930) additions which may be supports for a porch or stairway. The sloping airshaft, in the middle ground, connected the Baltimore shaft to the New Fan House (not shown) and Hillman Fan House in the background. The Hillman engine house is on the left. - Dorrance Colliery Fan Complex, South side of Susquehanna River at Route 115 & Riechard Street, Wilkes-Barre, Luzerne County, PA

323

6. EXTERIOR VIEW OF HILLMAN FAN HOUSE LOOKING WEST The ...  

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

6. EXTERIOR VIEW OF HILLMAN FAN HOUSE LOOKING WEST The engine house is on the right. The end of the 1883 Pittston Steam Engine cylinder head and steam chest is visible in the doorway. Although its stairs are missing, the iron framing of a porch stands in front of what was a doorway. The entrance door to the north airlock is visible inside the enlarged window. The end view of the upshaft chimney shows the brick ribbing for support, the brick corbelling, and concrete capstones. - Dorrance Colliery Fan Complex, South side of Susquehanna River at Route 115 & Riechard Street, Wilkes-Barre, Luzerne County, PA

324

5. EXTERIOR VIEW OF HILLMAN FAN HOUSE LOOKING NORTHWEST The ...  

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

5. EXTERIOR VIEW OF HILLMAN FAN HOUSE LOOKING NORTHWEST The airway, with its airlock entryway is in the foreground. Note the concrete foundation, steps, and sidewalks. The curved fan housing and edge of the iron roof are incorporated into the upshaft chimney; the lighter colored brick in the western section indicates either a modification or expansion of the chimney. The interior curve of the chimney is evident in the upper section of the right (east) wall of the chimney. - Dorrance Colliery Fan Complex, South side of Susquehanna River at Route 115 & Riechard Street, Wilkes-Barre, Luzerne County, PA

325

Comment on the Exterior Solutions and Their Geometry in Scalar-Tensor Theories of Gravity  

NASA Astrophysics Data System (ADS)

We study series of stationary solutions with asymptotic flatness properties in the Einstein-Maxwell-free scalar system because they are locally equivalent to the exterior solutions in some class of scalar-tensor theories of gravity. First, we classify spherical exterior solutions into two types of solutions, an apparently black hole type solution and an apparently worm hole type solution. The solutions contain three parameters, and we clarify their physical significance. Second, we reduce the field equations for the axisymmetric exterior solutions. We find that the reduced equations are partially the same as the Ernst equations. As simple examples, we derive new series of static, axisymmetric exterior solutions, which correspond to Voorhees's solutions. We then establish a non-trivial relation between the spherical exterior solutions and our new solutions. Finally, since null geodesics have conformally invariant properties, we study the local geometry of the exterior solutions by using the optical scalar equations and find some anomalous behavior of the null geodesics.

Tsuchida, T.; Watanabe, K.

1999-01-01

326

Why a ring of stars at r = 20 kpc?  

E-print Network

The recently discovered ring of stars near Galactocentric distance $r = 20$ kpc is interpreted as baryonic matter accreted onto the second caustic ring of dark matter in our galaxy. Caustic rings of dark matter were predicted in the Galactic plane at radii $a_n \\simeq 40 kpc/n$ where $n=1,2,3 ..$. They can reveal themselves by their gravitational influence on the distribution of baryonic matter. There is additional evidence for caustic rings of dark matter in the Milky Way from a series of sharp rises in the Galactic rotation curve. The positions of the rises are consistent at the 3% level with the above law for the caustic ring radii. Also, a triangular feature in the IRAS map of the galactic plane is consistent with the imprint of the caustic ring of dark matter nearest to us ($n=5$) upon dust and gas in the Galactic plane. These observations imply that the dark matter in our neighborhood is dominated by a single flow whose density and velocity vector are estimated.

Pierre Sikivie

2003-09-23

327

Lunar Ring  

Microsoft Academic Search

WHILE experimenting on the actenic power of lunar light on August 30 last (period of full moon), at 9.30 P.M., I obtained, with a minute-and-a-half exposure, a photographic negative of the moon, which shows a distinct and well-defined ring or glory around it which was not visible to the naked eye on looking directly at the moon in a clear

George Berwick

1879-01-01

328

3 Rings  

NSDL National Science Digital Library

This activity helps students develop concepts and language regarding the size and positional relationship possibilities of three circles in the plane in a qualitative manner. They use terms such as overlapping, inside, and touching as they work systematically to find all possible arrangements. The Teachers' Notes page includes suggestions for implementation, discussion questions, and ideas for extension. This activity can be a follow-up to "2 Rings" cataloged separately.

329

Active galactic nuclei  

PubMed Central

Active galactic nuclei are the most powerful, long-lived objects in the Universe. Recent data confirm the theoretical idea that the power source is accretion into a massive black hole. The common occurrence of obscuration and outflows probably means that the contribution of active galactic nuclei to the power density of the Universe has been generally underestimated. PMID:10220363

Fabian, Andrew C.

1999-01-01

330

The Galactic center  

Microsoft Academic Search

This paper reviews present information on the Galactic center region, provided in the last decades by the radio and IR astronomy and by the X-ray and gamma ray astronomy. Special attention is given to the current concept of the Galactic center, which involves a black hole of a few million solar masses at its dynamic center. Intense UV radiation emanates

Charles H. Townes

1989-01-01

331

Singular meshless method using double layer potentials for exterior acoustics.  

PubMed

Time-harmonic exterior acoustic problems are solved by using a singular meshless method in this paper. It is well known that the source points cannot be located on the real boundary, when the method of fundamental solutions (MFS) is used due to the singularity of the adopted kernel functions. Hence, if the source points are right on the boundary the diagonal terms of the influence matrices cannot be derived. Herein we present an approach to obtain the diagonal terms of the influence matrices of the MFS for the numerical treatment of exterior acoustics. By using the regularization technique to regularize the singularity and hypersingularity of the proposed kernel functions, the source points can be located on the real boundary and therefore the diagonal terms of influence matrices are determined. We also maintain the prominent features of the MFS, that it is free from mesh, singularity, and numerical integration. The normal derivative of the fundamental solution of the Helmholtz equation is composed of a two-point function, which is one of the radial basis functions. The solution of the problem is expressed in terms of a double-layer potential representation on the physical boundary based on the potential theory. The solutions of three selected examples are used to compare with the results of the exact solution, conventional MFS, boundary element method, and Dirichlet-to-Neumann finite element method. Good numerical performance is demonstrated by close agreement with other solutions. PMID:16454268

Young, D L; Chen, K H; Lee, C W

2006-01-01

332

Gas in galactic halos  

NASA Astrophysics Data System (ADS)

The interstellar medium in galactic halos is described as a consequence of feedback mechanisms from processes related to star-formation in the disk. The presence of gas in galactic halos is also expected due to accretion of gas from the circumgalactic environment. The observational evidence for gas in galactic halos - from the hot X-ray emitting coronal phase to cool molecular gas and dust - is reviewed and discussed in the context of current models of the ISM and the ``infall vs. outflow`` debate.

Dettmar, Ralf-Jürgen

2015-03-01

333

Reliable Exterior Orientation by a Robust Anisotropic Orthogonal Procrustes Algorithm  

NASA Astrophysics Data System (ADS)

The paper presents a robust version of a recent anisotropic orthogonal Procrustes algorithm that has been proposed to solve the socalled camera exterior orientation problem in computer vision and photogrammetry. In order to identify outliers, that are common in visual data, we propose an algorithm based on Least Median of Squares to detect a minimal outliers-free sample, and a Forward Search procedure, used to augment the inliers set one sample at a time. Experiments with synthetic data demonstrate that, when the percentage of outliers is greater than 30% or the data size is small, the proposed method is more accurate in detecting outliers than the customary detection based on median absolute deviation.

Fusiello, A.; Maset, E.; Crosilla, F.

2013-02-01

334

Electrochemical cell apparatus having an exterior fuel mixer nozzle  

DOEpatents

An electrochemical apparatus is made having a generator section containing electrochemical cells, a fresh gaseous feed fuel inlet, a gaseous feed oxidant inlet, and at least one hot gaseous spent fuel recirculation channel, where the spent fuel recirculation channel, a portion of which is in contact with the outside of a mixer chamber, passes from the generator chamber to combine with the fresh feed fuel inlet at the entrance to the mixer chamber, and a mixer nozzle is located at the entrance to the mixer chamber, where the mixer chamber connects with the reforming chamber, and where the mixer-diffuser chamber and mixer nozzle are exterior to and spaced apart from the combustion chamber, and the generator chamber, and the mixer nozzle can operate below 400 C. 2 figs.

Reichner, P.; Doshi, V.B.

1992-12-08

335

On the sound insulation of wood stud exterior walls  

NASA Astrophysics Data System (ADS)

This article reports the results of a series of measurements of the sound transmission loss of exterior wood stud walls. The measurements were made using standard laboratory procedures in which the walls were built between two reverberation chambers. The outdoor-indoor transmission class is used to rate the relative effectiveness of the various constructions. The measurement results are used to illustrate the influence of key parameters of the constructions on measured sound transmission loss values and to give guidance for future designs. The overall sound insulation of these wood stud walls, to typical outdoor noises, is shown to be limited by two types of low-frequency resonances. An understanding of these low-frequency limitations can most effectively lead to superior sound insulation in similar wood stud walls.

Bradley, J. S.; Birta, J. A.

2001-12-01

336

Closeup view of the exterior of the starboard side of ...  

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

Close-up view of the exterior of the starboard side of the forward fuselage of the Orbiter Discovery looking at the forward facing observation windows of the flight deck. Note the High-temperature Reusable Surface Insulation (HRSI) surrounding the window openings, the Low-temperature Reusable Surface Insulation (LRSI) immediately beyond the HRSI tiles and the Advanced Flexible Reusable Surface Insulation blankets just beyond the LRSI tiles. The holes in the tiles are injection points for the application of waterproofing material. The windows are composed of redundant pressure window panes of thermal glass. This image was taken from a service platform in the Orbiter Processing Facility at Kennedy Space Center - Space Transportation System, Orbiter Discovery (OV-103), Lyndon B. Johnson Space Center, 2101 NASA Parkway, Houston, Harris County, TX

337

GENERAL EXTERIOR VIEW, LOOKING NORTHEAST, OF THE SURFACE PLANT WITH ...  

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

GENERAL EXTERIOR VIEW, LOOKING NORTHEAST, OF THE SURFACE PLANT WITH CONVEYORS. JIM WALTER RESOURCES INC. MINING DIVISION OPERATES FOUR UNDERGROUND COAL MINES IN THE BLUE CREEK COAL FIELD OF BIRMINGHAM DISTRICT, THREE IN TUSCALOOSA COUNTY AND ONE IN JEFFERSON COUNTY. TOTAL ANNUAL PRODUCTION IS 8,000,000 TONS. AT 2,300 DEEP, JIM WALTER'S BROOKWOOD MINES ARE THE DEEPEST UNDERGROUND COAL MINES IN NORTH AMERICA. THEY PRODUCE A HIGH-GRADE MEDIUM VOLATILE LOW SULPHUR METALLURGICAL COAL. THE BROOKWOOD NO. 5 MINE (PICTURED IN THIS PHOTOGRAPH) EMPLOYS THE LONGWALL MINING TECHNIQUES WITH BELTS CONVEYING COAL FROM UNDERGROUND OPERATIONS TO THE SURFACE. - JIm Walter Resources, Incorporated, Brookwood No. 5 Mine, 12972 Lock 17 Road, Brookwood, Tuscaloosa County, AL

338

Spacetime Exterior to a Star: Against Asymptotic Flatness  

E-print Network

In many circumstances the perfect fluid conservation equations can be directly integrated to give a Geometric-Thermodynamic equation: typically that the lapse $N$ is the reciprocal of the enthalphy $h$, ($ N=1/h$). This result is aesthetically appealing as it depends only on the fluid conservation equations and does not depend on specific field equations such as Einstein's. Here the form of the Geometric-Thermodynamic equation is derived subject to spherical symmetry and also for the shift-free ADM formalism. There at least three applications of the Geometric-Thermodynamic equation, the most important being to the notion of asympotic flatness and hence to spacetime exterior to a star. For asymptotic flatness one wants $h\\to 0$ and $N\\to 1$ simultaneously, but this is incompatible with the Geometric-Thermodynamic equation. Observational data and asymptotic flatness are discussed. It is argued that a version of Mach's principle does not allow asymptotic flatness.

Mark D. Roberts

2002-05-16

339

Sensorized robotic sphere for large exterior critical infrastructures supervision  

NASA Astrophysics Data System (ADS)

The surveillance and inspection tasks in large exterior critical infrastructures have arisen as critical processes. More complex challenges are now present, and the traditional approaches are sometimes obsolete for facing these new menaces. An alternative system-a mobile sensor, spherical shaped-that provides a flexible, versatile, and reliable way to perform measurements is proposed. Even more, thanks to its original traction method (based on center of gravity destabilization), the system has a result as an all-terrain vehicle that guarantees a safe and friendly interaction with the environment. It has been widely tested, verifying as well the accurate acquisition performance, resulting in this system as a suitable sensing and monitoring alternative.

Hernández, Juan David; Sanz, David; Rodríguez-Canosa, Gonzalo R.; Barrientos, Jorge; del Cerro, Jaime; Barrientos, Antonio

2013-01-01

340

4. EXTERIOR VIEW OF HILLMAN FAN HOUSE LOOKING NORTHEAST This ...  

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

4. EXTERIOR VIEW OF HILLMAN FAN HOUSE LOOKING NORTHEAST This view shows the concrete roof covering the airways and the engine room. The reinforced concrete roof is supported by metal beams. Note how the airshaft, in the foreground, widens to create an airway on either side for the double inlet fan. The brick fan housing is capped by a curved sheet metal roof whose segments are bolted together. The brick updraft chimney, capped with concrete, is to the rear (northeast). Also evident on the wall is the cover over the air velocity indicator. The Hollenback Cemetery, which adjoins the Dorrance Colliery property is in the background. - Dorrance Colliery Fan Complex, South side of Susquehanna River at Route 115 & Riechard Street, Wilkes-Barre, Luzerne County, PA

341

7. EXTERIOR VIEW OF BALTIMORE FAN HOUSE, AIRWAY, AND HILLMAN ...  

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

7. EXTERIOR VIEW OF BALTIMORE FAN HOUSE, AIRWAY, AND HILLMAN FAN HOUSE LOOKING SOUTHEAST The roof of the 1908 Baltimore Fan House is to the left; the doorway opens onto the rear of the metal fan housing. In the immediate foreground is a section of the blast doors installed in the airway directly over the shaft to protect the fans in case of a mine explosion. The sloping airway, to the right, connects with the New Fan House, whose metal updraft chimney is evident in the right background. The engine house of the Hillman Fan House is in the left background with the fan housing and updraft chimney connected. The boiler house stack is in the background. All of the engines in the fan complex were powered by the boiler house. - Dorrance Colliery Fan Complex, South side of Susquehanna River at Route 115 & Riechard Street, Wilkes-Barre, Luzerne County, PA

342

3. EXTERIOR VIEW OF HILLMAN FAN HOUSE LOOKING NORTH The ...  

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

3. EXTERIOR VIEW OF HILLMAN FAN HOUSE LOOKING NORTH The airway, with sloping concrete roof, is in the foreground. Two periods of construction are evident. In the center of the wall, to the left of the window, is a cover over the air velocity indicator. The building houses a 35 foot diameter cast iron and wood Guibal centrifugal fan. The curve of the fan housing with its iron roof are in the middle ground, and the rectangular upshaft chimney is in the background. The brick, metal, and concrete building was designed to be fireproof. The metal upshaft chimney of the New Fan House is to the left. - Dorrance Colliery Fan Complex, South side of Susquehanna River at Route 115 & Riechard Street, Wilkes-Barre, Luzerne County, PA

343

A. Advertising and Signs Exterior signage is allowed for students sponsored activities, clubs and events to  

E-print Network

A. Advertising and Signs Exterior signage is allowed for students sponsored activities, clubs and events to promote student participation. 1. Student organizations may use exterior signs to advertise. A maximum of three wood signs may be posted for advertising an activity, club or event. 4. All signs must

Wu, Shin-Tson

344

How the airplane wing cut through the exterior columns of the World Trade Center  

Microsoft Academic Search

The problem of the airplane wing cutting through the exterior columns of the World Trade Center is treated analytically. The exterior columns are thin-walled box beam made of high strength steel. The complex structure of the airplane is lumped into another box, but it has been found that the equivalent thickness of the box is an order of magnitude larger

T. Wierzbicki; X. Teng

2003-01-01

345

Error Analysis and Preconditioning for an Enhanced DtN-FE Algorithm for Exterior Scattering Problems  

E-print Network

- to-Neumann (DtN) map/finite element (FE) algorithm for solving two-dimensional exterior scattering problems. We advocate the use of an exact DtN (or Steklov-Poincar´e) map at an artificial boundary exterior to the scatterer to truncate the unbounded computational region. The advantage of using an exact DtN map

Nigam, Nilima

346

On the coupled BEM and FEM for a nonlinear exterior Dirichlet problem in R 2  

Microsoft Academic Search

Summary In this paper we apply the coupling of boundary integral and finite element methods to solve a nonlinear exterior Dirichlet problem in the plane. Specifically, the boundary value problem consists of a nonlinear second order elliptic equation in divergence form in a bounded inner region, and the Laplace equation in the corresponding unbounded exterior region, in addition to appropriate

Gabriel N. Gatica; George C. Hsiao

1992-01-01

347

Accuracy analysis of exterior orientation elements on vertical parallax in POS-supported aerial photogrammetry  

NASA Astrophysics Data System (ADS)

This paper analyzes the effect of exterior orientation elements on vertical parallax, especially using the orientation parameters of aerial images obtained by a POS (Positioning and Orientation System) after calibration. Firstly, based on the theory of analytical relative orientation of consecutive photo connection, the exterior orientation elements can be easily translated to relative orientation elements. Then, the formula of vertical parallax can be deduced. The results of vertical parallax in left image space coordinate system are compared with the results calculated in the image coordinate system which are parallel to those of the object coordinate system. The validity and feasibility of the mathematical model are tested using two sets of actual data at different images scales. Finally, the differences between the effects of exterior orientation parameters on vertical parallax are compared using exterior orientation parameters obtained by traditional bundle block adjustment and by a POS after calibrated. And how the single element of exterior orientation effected on vertical parallax and how they worked together are analyzed. The empirical results indicate that the effects of different elements of exterior orientation on vertical parallax are different, all exterior orientation parameters can be affected by each other, so the overall effect of vertical parallax accuracy can be restricted by all exterior orientation parameters.

Wu, Zhenli; Yuan, Xiuxiao

2009-10-01

348

University of North Carolina at Charlotte Design and Construction Manual Section 2, Division 32 Exterior Improvements  

E-print Network

University of North Carolina at Charlotte Design and Construction Manual Section 2, Division 32 ­ Exterior Improvements SECTION 2 DIVISION 32 EXTERIOR IMPROVEMENTS #12;University of North Carolina. Standard Specifications for Roads and Structures, North Carolina Department of Transportation, July 1995

Xie,Jiang (Linda)

349

Investigation of vessel exterior air cooling for a HLMC reactor  

SciTech Connect

The Secure Transportable Autonomous Reactor (STAR) concept under development at Argonne National Laboratory provides a small (300 MWt) reactor module for steam supply that incorporates design features to attain proliferation resistance, heightened passive safety, and improved cost competitiveness through extreme simplification. Examples are the achievement of 100%+ natural circulation heat removal from the low power density/low pressure drop ultra-long lifetime core and utilization of lead-bismuth eutectic (LBE) coolant enabling elimination of main coolant pumps as well as the need for an intermediate heat transport circuit. It is required to provide a passive means of removing decay heat and effecting reactor cooldown in the event that the normal steam generator heat sink, including its normal shutdown heat removal mode, is postulated to be unavailable. In the present approach, denoted as the Reactor Exterior Cooling System (RECS), passive decay heat removal is provided by cooling the outside of the containment/guard vessel with air. RECS is similar to the Reactor Vessel Auxiliary Cooling System (RVACS) incorporated into the PRISM design. However, to enhance the heat removal, RECS incorporates fins on the containment vessel exterior to enhance heat transfer to air as well as removable steel venetian conductors that provide a conduction heat transfer path across the reactor vessel-containment vessel gap to enhance heat transfer between the vessels. The objective of the present work is to investigate the effectiveness of air cooling in removing heat from the vessel and limiting the coolant temperature increase following a sudden complete loss of the steam generator heat sink.

Sienicki, J. J.; Spencer, B. W.

2000-01-13

350

galpy: Galactic dynamics package  

NASA Astrophysics Data System (ADS)

galpy is a python package for galactic dynamics. It supports orbit integration in a variety of potentials, evaluating and sampling various distribution functions, and the calculation of action-angle coordinates for all static potentials.

Bovy, Jo

2014-11-01

351

The Myth of the Molecular Ring  

E-print Network

We investigate the structure of the Milky Way by determining how features in a spatial map correspond to CO features in a velocity map. We examine structures including logarithmic spiral arms, a ring and a bar. We explore the available parameter space, including the pitch angle of the spiral arms, radius of a ring, and rotation curve. We show that surprisingly, a spiral arm provides a better fit to the observed molecular ring than a true ring feature. This is because both a spiral arm, and the observed feature known as the molecular ring, are curved in velocity longitude space. We find that much of the CO emission in the velocity longitude map can be fitted by a nearly symmetric 2 armed spiral pattern. One of the arms corresponds to the molecular ring, whilst the opposite arm naturally reproduces the Perseus arm. Multiple arms also contribute to further emission in the vicinity of the molecular ring and match other observed spiral arms. Whether the Galactic structure consists primarily of two, or several spir...

Dobbs, C L

2012-01-01

352

Young Galactic Globular Clusters  

E-print Network

Nine presently known "young" Galactic globular clusters, which have ages / 3 Gyr smaller than the oldest clusters of similar metallicity, all have RGC > 15 kpc. Furthermore these young globulars are found to have below-average luminosities. These results suggest that (1) globular cluster formation extended over a considerable period of time in the outermost part of the Galactic halo, and (2) that typical luminosities (masses) of such outer halo clusters decreased with time.

Sidney van den Bergh

1998-02-12

353

24 CFR 200.946 - Building product standards and certification program for exterior finish and insulation systems...  

Code of Federal Regulations, 2010 CFR

...Test Method for Structural Performance of Exterior Windows, Curtain Walls, and Doors by Uniform Static...also shall have the exterior wall insulation and finish systems...assure that the original performance is maintained....

2010-04-01

354

24 CFR 200.946 - Building product standards and certification program for exterior finish and insulation systems...  

Code of Federal Regulations, 2011 CFR

...Test Method for Structural Performance of Exterior Windows, Curtain Walls, and Doors by Uniform Static...also shall have the exterior wall insulation and finish systems...assure that the original performance is maintained....

2011-04-01

355

Perihelion evolution of observed new comets implies the dominance of the galactic tide in making Oort cloud comets discernable  

Microsoft Academic Search

For an Oort cloud comet to be seen as a new comet, its perihelion must be moved from a point exterior to the loss cylinder boundary to a point interior to observable limits in a single orbit. The galactic tide can do this continuously, in a non-impulsive manner. Near-parabolic comets, with specific angular momentum H?q, will most easily be made

John J. Matese; Jack J. Lissauer

2004-01-01

356

Metal concentrations in aggregate interiors, exteriors, whole aggregates, and bulk of Costa Rican soils  

SciTech Connect

In many temperate soils the preferential weathering and leaching of aggregate surfaces and the nonaggregated material between aggregates depletes geogenic metals. It also shifts metals from strongly to more weakly bound metal forms. Deposited metals are sorbed preferentially on aggregate surfaces and between aggregates. The authors examined whether preferential desilication under tropical climate causes an enrichment in the aggregate exteriors in oxidic forms of metals. They also studied where deposited metals are bound in these soils. Aggregates (2--20 mm) were selected manually from the A horizons of eight Oxisols, six Andisols, two Mollisols, and two Inceptisols in Costa Rica. All samples were fractionated into interior and exterior portions and treated with a seven-step sequence to extract Al, Cd, Cu, Fe, Mn, Pb, and Zn. Total concentrations of all metals except Zn were higher in the aggregate exteriors than in the interiors. The average Cd and Pb concentrations in easily extractable fractions were significantly higher in the aggregate exteriors. There were no significant differences in metal partitioning between interiors and exteriors except for Pb, which had higher proportions in extractable forms with NH{sub 2}OH {center{underscore}dot} HCl {gt} NH{sub 4} - acetate, pH 6.0 {gt} EDTA in the exteriors. There were few significant differences in metal concentrations and partitioning between bulk soil and whole aggregates. The results may be explained by (i) preferential desilication of the aggregate exteriors and (ii) preferential sorption of deposited heavy metals mainly in easily extractable forms.

Wilcke, W.; Kretzschmar, S.; Bundt, M.; Zech, W.

1999-10-01

357

Asymmetric dipolar ring  

DOEpatents

A device having a dipolar ring surrounding an interior region that is disposed asymmetrically on the ring. The dipolar ring generates a toroidal moment switchable between at least two stable states by a homogeneous field applied to the dipolar ring in the plane of the ring. The ring may be made of ferroelectric or magnetic material. In the former case, the homogeneous field is an electric field and in the latter case, the homogeneous field is a magnetic field.

Prosandeev, Sergey A. (Fayetteville, AR); Ponomareva, Inna V. (Tampa, FL); Kornev, Igor A. (Ill-de-France, FR); Bellaiche, Laurent M. (Fayetteville, AR)

2010-11-16

358

The Rot-Div System in Exterior Domains  

NASA Astrophysics Data System (ADS)

The goal of this paper is to reconsider the classical elliptic system rot v = f, div v = g in simply connected domains with bounded connected boundaries (bounded and exterior sets). The main result shows solvability of the problem in the maximal regularity regime in the L p -framework taking into account the optimal/minimal requirements on the smoothness of the boundary. A generalization for the Besov spaces is studied, too, for {{f} in dot B^s_{p,q}(?)} for {-1+frac 1p < s < frac 1p} . As a limit case we prove the result for {{f} in dot B^0_{3,1}(?)} , provided the boundary is merely in {B^{2-1/3}_{3,1}} . The dimension three is distinguished due to the physical interpretation of the system. In other words we revised and extended the classical results of Friedrichs (Commun Pure Appl Math 8;551-590, 1955) and Solonnikov (Zap Nauch Sem LOMI 21:112-158, 1971).

Mucha, Piotr B.; Pokorný, Milan

2014-08-01

359

Galactic Superluminal Sources  

NASA Technical Reports Server (NTRS)

A new class of X-ray sources was clearly established with the discovery of highly relativistic radio jets from the two galactic sources GRS 1915+105 and GRO Jl655-40. Both of these objects have given us a broader view of black holes and the formation of jets, yet they also show the complexity of the accretion environment near relativistic objects. The fast apparent motion of the jets, their luminosity and variability, their high energy spectrum, and approximately scaling to the behavior of active galactic nuclei, certainly warrant the description "microquasar". A review of the observational data on these sources is presented, and where we stand on a physical picture of GRS 1915+105 and GRO J165540 as taken from multi-wavelength studies is also discussed. Other galactic sources which share some of the properties of the microquasars, and what to look for as a high energy "signature" in future observations is also discussed.

Harmon, B. Alan

1998-01-01

360

Galactic Superluminal Sources  

NASA Technical Reports Server (NTRS)

A new class of X-ray sources was clearly established with the discovery of highly relativistic radio jets from the galactic sources GRS 1915+105 and GRO J1655-40. Both of these objects have given us a broader view of black holes and the formation of jets, yet they also show the complexity of the accretion environment near relativistic objects. The fast apparent motion of the jets, their luminosity and variability, high energy spectrum, and approximate scaling to the behavior of active galactic nuclei, certainly warrant the description 'microquasar". I present a review of the observational data on these sources, and discuss where we stand on a physical picture of GRS 1915+105 and GRO J1655-40 as taken from multi-wavelength studies. I also point out other galactic sources which share some of the properties of the microquasars, and what to look for as a high energy "signature' in future observations.

Harmon, B. A.

1998-01-01

361

On the Formation of Elliptical Rings in Disk Galaxies  

E-print Network

N-body simulations of galactic collisions are employed to investigate the formation of elliptical rings in disk galaxies. The relative inclination between disk and dwarf galaxies is studied with a fine step of five degrees. It is confirmed that the eccentricity of elliptical ring is linearly proportional to the inclination angle. Deriving from the simulational results, an analytic formula which expresses the eccentricity as a function of time and inclination angle is obtained. This formula shall be useful for the interpretations of the observations of ring systems, and therefore reveals the merging histories of galaxies.

Wu, Yu-Ting

2015-01-01

362

Saturn's Ring: Pre-Cassini Status and Mission Goals  

NASA Technical Reports Server (NTRS)

In November 1980, and again in August 1981, identical Voyager spacecraft flew through the Saturn system, changing forever the way we think about planetary rings. Although Saturn's rings had been the only known ring system for three centuries, a ring system around Uranus had been discovered by stellar occultations from Earth in 1977, and the nearly transparent ring of Jupiter was imaged by Voyager in 1979 (the presence of material there had been inferred from charged particle experiments on Pioneer 10 and 11 several years earlier). While Saturn had thus temporarily lost its uniqueness as having the only ring system, with Voyager it handily recaptured the role of having the most fascinating one. The Voyager breakthroughs included spiral density and bending waves such as cause galactic structure; ubiquitous fine-scale radial 'irregular' structure, with the appearance of record-grooves; regional and local variations in particle color; complex, azimuthally variable ring structure; empty gaps in the rings, some containing very regular, sharp-edged, elliptical rings and one containing both a small moonlet and incomplete arcs of dusty material; and shadowy 'spokes' that flicker across the main rings. One of the paradigm shifts of this period was the realization that many aspects of planetary rings, and even the ring systems themselves, could be 'recent' on geological timescales. These early results are reviewed and summarized in the Arizona Space Science series volumes 'Saturn'. (An excellent review of ring dynamics at a formative stage is by Goldreich and Tremaine.) From the mid 1980's to the time of this writing, progress has been steady, while at a less heady pace, and some of the novel ring properties revealed by Voyager 1 and 2 are beginning to be better understood. It is clearly impossible to cite, much less review, every advance over the last decade; however, below we summarize the main advances in understanding of Saturn's rings since the mid 1980's, in the context of the Cassini Science Objectives.

Cuzzi, Jeff N.; DeVincenzi, Donald L. (Technical Monitor)

1999-01-01

363

Rings and Radial Waves in the Disk of the Milky Way  

E-print Network

We show that in the anticenter region, between Galactic longitudes of $110^\\circkpc from the Sun to more stars in the south at 4-6 kpc from the Sun to more stars in the north at distances of 8-10 kpc from the Sun. We also see evidence that there are more stars in the south at distances of 12-16 kpc from the Sun. The three more distant asymmetries form roughly concentric rings around the Galactic center, opening in the direction of the Milky Way's spiral arms. The northern ring, 9 kpc from the Sun, is easily identified with the previously discovered Monoceros Ring. Parts of the southern ring at 14 kpc from the Sun (which we call the TriAnd Ring) have previously been identified as related to the Monoceros Ring and others have been called the Triangulum Andromeda Ove...

Xu, Yan; Carlin, Jeffrey L; Liu, Chao; Deng, Licai; Li, Jing; Schönrich, Ralph; Yanny, Brian

2015-01-01

364

Active galactic nuclei  

SciTech Connect

In this book the observational investigations of activity in the nuclear regions of galaxies, and the physical phenomena underlying this activity are discussed; and it is emphasized that this is the major area of astronomical research. What is very evident is that specific classes of galaxies can be studied only by observing galactic nuclei over the entire accessible range of the electromagnetic spectrum. The chapters are entitled: Active Galactic Nuclei, Weak Flat-Spectrum Radio Sources; Extragalactic Radio Sources; Young Supernovae; Radioemission of Sbc Galaxies, Radiostructure of Seyfert Nuclei; Elliptical Galaxies; Blazars, Gravitational Bending of Light, etc.

Dyson, J.E.

1985-01-01

365

Formation of Galactic Disks  

E-print Network

We review progress in understanding the formation of galactic disks in the standard cosmogonic scenario involving gravitational clustering of baryons and dark matter and dissipative collapse of the baryons. This scenario accounts remarkably well for the observed properties of galactic disks if they have retained most of the specific angular momentum they acquired by tidal torques. Early simulations, which included cooling of the gas but not star formation and the associated feedback, indicated instead that most of the angular momentum of the baryons would be transferred to the dark matter. Recent simulations indicate that this angular-momentum problem can be solved partially, and in some cases entirely, by feedback and other effects.

S. Michael Fall

2002-03-27

366

3. Historic American Buildings Survey Bruce CunninghamWerdnigg, Photographer, 1970 EXTERIOR ...  

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

3. Historic American Buildings Survey Bruce Cunningham-Werdnigg, Photographer, 1970 EXTERIOR FACING WHITNEY AVENUE Credit line of photographer must accompany reproduction - Atwater-Ciampolini House, 321 Whitney Avenue, New Haven, New Haven County, CT

367

Brane-world stars with a solid crust and vacuum exterior  

NASA Astrophysics Data System (ADS)

The minimal geometric deformation approach is employed to show the existence of brane-world stellar distributions with a vacuum Schwarzschild exterior, thus without energy leaking from the exterior of the brane-world star into the extra dimension. The interior satisfies all the elementary criteria of physical acceptability for a stellar solution, namely, it is regular at the origin, the pressure and density are positive and decrease monotonically with increasing radius, and all energy conditions are fulfilled. A very thin solid crust with negative radial pressure separates the interior from the exterior, having a thickness ? inversely proportional to both the brane tension ? and the radius R of the star, i.e. {{? }-1}˜ R? . This brane-world star with Schwarzschild exterior would appear only thermally radiating to a distant observer and be fully compatible with the stringent constraints imposed on stellar parameters by observations of gravitational lensing, orbital evolutions or properties of accretion disks.

Ovalle, Jorge; Gergely, László Á.; Casadio, Roberto

2015-02-01

368

2. VIEW LOOKING EASTNORTHEAST AT EXTERIOR OF 8FOOT TRANSONIC PRESSURE ...  

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

2. VIEW LOOKING EAST-NORTHEAST AT EXTERIOR OF 8-FOOT TRANSONIC PRESSURE TUNNEL (BUILDING 640). NOTE NACA LOGO OVER DOORWAY. - NASA Langley Research Center, 8-Foot Transonic Pressure Tunnel, 640 Thornell Avenue, Hampton, Hampton, VA

369

OBLIQUE/EXTERIOR VIEW, SIDE AND FRONT ELEVATIONS, FOUR ROOMPYRAMIDAL ROOF COTTAGE ...  

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

OBLIQUE/EXTERIOR VIEW, SIDE AND FRONT ELEVATIONS, FOUR ROOM-PYRAMIDAL ROOF COTTAGE (AT 328 CAMILLE) WITH FRONT YARD LANDSCAPING. - Mulga Community, Off AL 269 at I-20-59, Birmingham, Jefferson County, AL

370

OBLIQUE/EXTERIOR VIEW, SIDE AND FRONT ELEVATIONS, FOUR ROOMPYRAMIDAL ROOF COTTAGE ...  

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

OBLIQUE/EXTERIOR VIEW, SIDE AND FRONT ELEVATIONS, FOUR ROOM-PYRAMIDAL ROOF COTTAGE AT 328 CAMILLE STREET WITH SIDE YARD GARDER. - Mulga Community, Off AL 269 at I-20-59, Birmingham, Jefferson County, AL

371

4. EXTERIOR NORTHEAST VIEW (1992). WrightPatterson Air Force Base, ...  

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

4. EXTERIOR NORTHEAST VIEW (1992). - Wright-Patterson Air Force Base, Area B, Building 6, Signal Corps Special Forces Hangar, On flightline at Southeast corner of Eleventh & C Streets, Dayton, Montgomery County, OH

372

3. EXTERIOR NORTH VIEW (1992). WrightPatterson Air Force Base, ...  

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

3. EXTERIOR NORTH VIEW (1992). - Wright-Patterson Air Force Base, Area B, Building 6, Signal Corps Special Forces Hangar, On flightline at Southeast corner of Eleventh & C Streets, Dayton, Montgomery County, OH

373

2. EXTERIOR NORTHWEST VIEW (1992). WrightPatterson Air Force Base, ...  

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

2. EXTERIOR NORTHWEST VIEW (1992). - Wright-Patterson Air Force Base, Area B, Building 6, Signal Corps Special Forces Hangar, On flightline at Southeast corner of Eleventh & C Streets, Dayton, Montgomery County, OH

374

1. EXTERIOR SOUTHEAST VIEW (1991). WrightPatterson Air Force Base, ...  

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

1. EXTERIOR SOUTHEAST VIEW (1991). - Wright-Patterson Air Force Base, Area B, Building 6, Signal Corps Special Forces Hangar, On flightline at Southeast corner of Eleventh & C Streets, Dayton, Montgomery County, OH

375

Exterior view, looking southwest OvertheHorizon Backscatter Radar Network, Tulelake ...  

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

Exterior view, looking southwest - Over-the-Horizon Backscatter Radar Network, Tulelake Radar Site Receive Sector Four Receiver Building, Unnamed Road West of Double Head Road, Tulelake, Siskiyou County, CA

376

Exterior view, looking west OvertheHorizon Backscatter Radar Network, Tulelake ...  

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

Exterior view, looking west - Over-the-Horizon Backscatter Radar Network, Tulelake Radar Site Receive Sector Four Receiver Building, Unnamed Road West of Double Head Road, Tulelake, Siskiyou County, CA

377

48. Exterior detail of Marine Railway #1. Note rail/roller type ...  

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

48. Exterior detail of Marine Railway #1. Note rail/roller type (wood beam with steel plate for railway/rollers on sled) and removable catwalk on bed. - Barbour Boat Works, Tryon Palace Drive, New Bern, Craven County, NC

378

MOVEMENT AND DEPOSITION OF PESTICIDES WITHIN RESIDENCES AFTER INTERIOR AND EXTERIOR APPLICATIONS  

EPA Science Inventory

In a study begun in 1999, the Environmental Protection Agency (EPA) investigated the temporal and spatial distributions of pesticides applied by homeowners and commercial applicators for indoor crack and crevice and exterior perimeter treatments. In each participating househol...

379

15. Historic American Buildings Survey Charles Snow, Photographer ca.1962 EXTERIOR ...  

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

15. Historic American Buildings Survey Charles Snow, Photographer ca.1962 EXTERIOR VIEW OF JOPLIN HOTEL CIRCA 1962 From the Collection of the Joplin Globe, Photocopy by Charles Snow - The Connor Hotel, 324 Main Street, Joplin, Jasper County, MO

380

3. Exterior view of Systems Integration Laboratory Building (T28), looking ...  

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

3. Exterior view of Systems Integration Laboratory Building (T-28), looking southeast. - Air Force Plant PJKS, Systems Integration Laboratory, Systems Integration Laboratory Building, Waterton Canyon Road & Colorado Highway 121, Lakewood, Jefferson County, CO

381

4. Exterior view of Systems Integration Laboratory Building (T28), looking ...  

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

4. Exterior view of Systems Integration Laboratory Building (T-28), looking northwest. - Air Force Plant PJKS, Systems Integration Laboratory, Systems Integration Laboratory Building, Waterton Canyon Road & Colorado Highway 121, Lakewood, Jefferson County, CO

382

FDDI Ring Demonstration  

NSDL National Science Digital Library

This applet demonstrates an FDDI ring. Users may add or delete stations (or computers) from the ring. The applet allows the user to show data being circulated around the ring. Users may also select to demonstrate the cases when the ring becomes broken or when one of the stations is switched off. (UNC E-Learning Grant)

383

Stirling engine piston ring  

SciTech Connect

A piston ring design for a Stirling engine wherein the contact pressure between the piston and the cylinder is maintained at a uniform level, independent of engine conditions through a balancing of the pressure exerted upon the ring's surface and thereby allowing the contact pressure on the ring to be predetermined through the use of a preloaded expander ring.

Howarth, Roy B. (Clifton Park, NY)

1983-01-01

384

Stirling engine piston ring  

SciTech Connect

A piston ring design for a Stirling engine wherein the contact pressure between the piston and the cylinder is maintained at a uniform level, independent of engine conditions through a balancing of the pressure exerted upon the ring's surface and thereby allowing the contact pressure on the ring to be predetermined through the use of a preloaded expander ring. 2 figs.

Howarth, R.B.

1983-12-27

385

The Canadian Galactic Plane Survey  

Microsoft Academic Search

The Canadian Galactic Plane Survey (CGPS) is a project to combine radio, millimeter, and infrared surveys of the Galactic plane to provide arcminute-scale images of all major components of the interstellar medium over a large portion of the Galactic disk. We describe in detail the observations for the low-frequency component of the CGPS, the radio surveys carried out at the

A. R. Taylor; S. J. Gibson; M. Peracaula; P. G. Martin; T. L. Landecker; C. M. Brunt; P. E. Dewdney; S. M. Dougherty; A. D. Gray; L. A. Higgs; C. R. Kerton; L. B. G. Knee; R. Kothes; C. R. Purton; B. Uyaniker; B. J. Wallace; A. G. Willis; D. Durand

2003-01-01

386

A genetic-algorithm-based experimental technique for determining heat transfer coefficient of exterior wall surface  

Microsoft Academic Search

A new experimental procedure was proposed based on genetic algorithm for analyzing exterior wall surface heat transfer process and deducing exterior wall surface heat transfer coefficient under actual conditions. Tests were carried out under a wide range of conditions, and the heat transfer coefficient was found vary from 14.315 to 24.412 W\\/m2K while wind speed ranged from 1.04 to 7.36

Ling Zhang; Nan Zhang; Fuyun Zhao; Youming Chen

2004-01-01

387

Comment on the Exterior Solutions and Their Geometry in Scalar-Tensor Theories of Gravity  

Microsoft Academic Search

We study series of stationary solutions with asymptotic flatness properties in the Einstein-Maxwell-free scalar system because they are locally equivalent to the exterior solutions in some class of scalar-tensor theories of gravity. First, we classify spherical exterior solutions into two types of solutions, an apparently black hole type solution and an apparently worm hole type solution. The solutions contain three

T. Tsuchida; Kazuya Watanabe

1999-01-01

388

New Dust Belts of Uranus: One Ring, Two Ring, Red Ring, Blue Ring  

SciTech Connect

We compare near-infrared observations of the recently discovered outer rings of Uranus with HST results. We find that the inner ring, R/2003 U 2, is red, whereas the outer ring, R/2003 U 1, is very blue. Blue is an unusual color for rings; Saturn's enigmatic E ring is the only other known example. By analogy to the E ring, R/2003 U 1 is probably produced via impacts into the embedded moon Mab, which apparently orbits at a location where non-gravitational perturbations favor the survival and spreading of sub-micron sized dust. R/2003 U 2 more closely resembles Saturn's G ring.

de Pater, I; Hammel, H B; Gibbard, S G; Showalter, M R

2006-02-02

389

Imaging and mapping the circumsolar dust ring near the orbit of Venus  

NASA Astrophysics Data System (ADS)

Asteroids and comets are the dominant source of dust feeding the zodiacal cloud [1,2]. The orbits of grains of size 10--100 microns are expected to decay by Poynting-Robertson drag [3], but in the vicinity of planetary orbits dust may get trapped into exterior mean motion resonances [4] to form a circumsolar dust ring. It has long been known that such a ring exists close to the Earth's orbit [5], but even now, little is known about its detailed structure. No such ring or associated resonance feature has been detected at the orbits of Mars or Jupiter [6]. While re-analysis of photometry data from the Helios mission provided some evidence of a ring associated with Venus [7], the existence of such a ring could not be conclusively demonstrated. Here we report on recent work that confirms the existence of a circumsolar ring at Venus from sensitive optical photometry of the zodiacal cloud [8]. Our analysis uses synoptic images from the HI-2 instrument on STEREO [9]. We discuss the techniques that we have developed to extract images of the Venus ring, and describe the approach taken towards creating a simple parametric model of the ring. We note that the maximum over-density in the ring is about 10% that of the smooth zodiacal cloud, and we highlight other aspects of the ring structure that we have already determined. We demonstrate that the STEREO HI-2 data allow the density structure of the Venus ring to be mapped in much greater detail than the Earth ring. Thus the Venus ring has the potential to provide a stringent test of models of resonance ring formation. Not only is this relevant to understanding the structure of the zodiacal cloud, it is of importance in the context of exoplanetary systems which are also expected to display analogous circumstellar dust rings [10,11]. We conclude by discussing current progress in mapping the density distribution of the Venus circumsolar ring.

Jones, M.; Bewsher, D.; Brown, D.

2014-07-01

390

Axions and the galactic angular momentum distribution  

NASA Astrophysics Data System (ADS)

We analyze the behavior of axion dark matter before it falls into a galactic gravitational potential well. The axions thermalize sufficiently fast by gravitational self-interactions that almost all go to their lowest-energy state consistent with the total angular momentum acquired from tidal torquing. That state is a state of rigid rotation on the turnaround sphere. It predicts the occurrence and detailed properties of the caustic rings of dark matter for which observational evidence had been found earlier. We show that the vortices in the axion Bose-Einstein condensate (BEC) are attractive, unlike those in superfluid He4 and dilute gases. We expect that a large fraction of the vortices in the axion BEC join into a single big vortex along the rotation axis of the galaxy. The resulting enhancement of caustic rings explains the typical size of the rises in the Milky Way rotation curve attributed to caustic rings. We show that baryons and ordinary cold dark matter particles are entrained by the axion BEC and acquire the same velocity distribution. The resulting baryonic angular momentum distribution gives a good qualitative fit to the distributions observed in dwarf galaxies. We give estimates of the minimum fraction of dark matter that is composed of axions.

Banik, N.; Sikivie, P.

2013-12-01

391

Implications of the IRAS survey for Galactic gamma-ray astronomy  

NASA Technical Reports Server (NTRS)

Using the results of the IRAS far-infrared survey of the Galaxy, we have obtained the large-scale radial distributions of Galactic far infrared emission independently for both the Northern and Southern Hemisphere sides of the Galaxy. We find the dominant feature in these distributions to be a broad peak coincident with the '5 kpc' molecular gas cloud ring. We also find evidence of spiral arm features. Strong correlations are evident between the large scale Galactic distributions of far infrared emission, gamma-ray emission and CO emission. We find a particularly tight correlation between the distribution of warm molecular clouds and far-infrared emission on a Galactic scale.

Stecker, F. W.; Harding, A. K.; Skibo, J.

1991-01-01

392

Simulations of Galactic Dynamos  

NASA Astrophysics Data System (ADS)

We review our current understanding of galactic dynamo theory, paying particular attention to numerical simulations both of the mean-field equations and the original three-dimensional equations relevant to describing the magnetic field evolution for a turbulent flow. We emphasize the theoretical difficulties in explaining non-axisymmetric magnetic fields in galaxies and discuss the observational basis for such results in terms of rotation measure analysis. Next, we discuss nonlinear theory, the role of magnetic helicity conservation and magnetic helicity fluxes. This leads to the possibility that galactic magnetic fields may be bi-helical, with opposite signs of helicity and large and small length scales. We discuss their observational signatures and close by discussing the possibilities of explaining the origin of primordial magnetic fields.

Brandenburg, Axel

393

How did the rings of Uranus form?  

NASA Astrophysics Data System (ADS)

Uranus is encircled by at least ten narrow, dense, and widely separated rings with a typical optical depth ? 0.3, the first nine of which (6, 5, 4, ?, ?, ?, , ?, and ? rings as seen going outward from Uranus) were discovered from the ground during observations of the planet's atmosphere in 1977. In this work, a fairly uniform, rapidly and differentially rotating disk of rarely colliding particles (when the frequency of interparticle collisions is much smaller than the local orbital frequency) in a planet- moon system is considered. A moon causes a number of orbital resonant effects in this continuous viscous (through ordinary collisions) disk. In the frame of hydrodynamical theory, the gravitational torques exerted by an exterior moon on particles at an inner Lindblad horizontal resonance and corresponding vertical resonance are estimated. It is shown that the torques are negative at these resonances, so gaps in the disk near each resonance may be created. The latter result can be used to provide a viable clue to solving of the puzzle of narrow, dense, and widely separated rings of Uranus. The model is advocated which suggests that the Uranian ring orbits have a close connection with small moons of the planet interior to the orbit of Miranda, from Cordelia to Mab discovered by VOYAGER 2 imaging observations in 1986. As angular momentum is transferred outward to the moon, material in the close vicinity of the resonances falls to the inner part of the system under study. On the other hand, in a collision disk the angular momentum is steadily concentrated onto a fraction of the mass which is spiraling away. In Uranus' system, this viscous radial spreading of the disk (and associated outward flow of angular momentum) may be terminated by the torque exerted by the moon via the low-order orbital resonance. This work was jointly supported by the Israel Science Foundation, the Binational U.S.-Israel Science Foundation, and the Israeli Ministry of Immigrant Absorption in the framework of the program "KAMEA."

Griv, E.

2007-08-01

394

Galactic oscillator symmetry  

NASA Technical Reports Server (NTRS)

Riemann ellipsoids model rotating galaxies when the galactic velocity field is a linear function of the Cartesian coordinates of the galactic masses. In nuclear physics, the kinetic energy in the linear velocity field approximation is known as the collective kinetic energy. But, the linear approximation neglects intrinsic degrees of freedom associated with nonlinear velocity fields. To remove this limitation, the theory of symplectic dynamical symmetry is developed for classical systems. A classical phase space for a self-gravitating symplectic system is a co-adjoint orbit of the noncompact group SP(3,R). The degenerate co-adjoint orbit is the 12 dimensional homogeneous space Sp(3,R)/U(3), where the maximal compact subgroup U(3) is the symmetry group of the harmonic oscillator. The Hamiltonian equations of motion on each orbit form a Lax system X = (X,F), where X and F are elements of the symplectic Lie algebra. The elements of the matrix X are the generators of the symplectic Lie algebra, viz., the one-body collective quadratic functions of the positions and momenta of the galactic masses. The matrix F is composed from the self-gravitating potential energy, the angular velocity, and the hydostatic pressure. Solutions to the hamiltonian dynamical system on Sp(3,R)/U(3) are given by symplectic isospectral deformations. The Casimirs of Sp(3,R), equal to the traces of powers of X, are conserved quantities.

Rosensteel, George

1995-01-01

395

Saturn's ring system  

NASA Technical Reports Server (NTRS)

Eight hours after its closest approach to Saturn on Nov. 12, 1980, Voyager 1 took this picture of the planet's ring system. Major features of the rings are clearly seen: from the top of the image down is the bright F-ring, the A-ring, the Cassini Division, the broad B-ring, and the C-ring (dark gray area). The spacecraft took this picture at a distance of 720,000 kilometers (446,000 miles) from an angle approximately 30 degrees above the ring plane. The unique lighting in this view brings out the many hundreds of bright and dark ringlets that make up this very thin, phonograph record-like ring system. The dark spokelike features seen in images taken during approach to Saturn now appear as bright streaks, indicating that they possess a strong forward-scattering property. The Voyager Project is managed for NASA by the Jet Propulsion Laboratory, Pasadena, Calif.

1980-01-01

396

New dust belts of Uranus: one ring, two ring, red ring, blue ring.  

PubMed

We compared near-infrared observations of the recently discovered outer rings of Uranus with Hubble Space Telescope results. We find that the inner ring, R/2003 U 2, is red, whereas the outer ring, R/2003 U 1, is very blue. Blue is an unusual color for rings; Saturn's enigmatic E ring is the only other known example. By analogy to the E ring, R/2003 U 1 is probably produced by impacts into the embedded moon Mab, which apparently orbits at a location where nongravitational perturbations favor the survival and spreading of submicron-sized dust. R/2003 U 2 more closely resembles Saturn's G ring, which is red, a typical color for dusty rings. PMID:16601188

de Pater, Imke; Hammel, Heidi B; Gibbard, Seran G; Showalter, Mark R

2006-04-01

397

The jumping ring experiment  

NASA Astrophysics Data System (ADS)

The jumping ring experiment has become central to liquid nitrogen shows given as part of the outreach and open day activities carried out within the University of Bath. The basic principles of the experiment are described as well as the effect of changing the geometry of the rings and their metallurgical state. In general, aluminium rings are used, but the effect of using copper rings is briefly discussed.

Baylie, M.; Ford, P. J.; Mathlin, G. P.; Palmer, C.

2009-01-01

398

Radio and gamma ray evidence for a molecular-arm feature at 5 kpc from the galactic centre. [observing galactic longitude of CO emission  

NASA Technical Reports Server (NTRS)

Recent measurements of the galactic CO distribution as evidenced from 2.6 mm radio observations of the CO emission line intensity are correlated with the SAS-2 measurements of galactic gamma ray emission. Both distributions are indicative of a ring-shaped distribution or arm consisting of cool clouds of molecular hydrogen at a galactocentric distance of approximately 5 kpc. The mean density of H2 in this region is estimated to be between 1 and 5 cu cm. Both a galactic and extra-galactic origin of cosmic rays are consistent with the observations, although the presence of dynamical effects and increased star formation at 5 kpc in the dense molecular clouds may be connected with an increase in cosmic-ray production.

Solomon, P. M.; Stecker, F. W.

1974-01-01

399

Token Ring Demonstration  

NSDL National Science Digital Library

This applet demonstrates a Token Ring. Users may add or delete stations (or computers) from the ring. The applet allows the user to show data being circulated around the ring. Users may also select to demonstrate the cases when one of the stations is switched off, or monitoring. (UNC E-Learning Grant)

400

The Jumping Ring Experiment  

ERIC Educational Resources Information Center

The jumping ring experiment has become central to liquid nitrogen shows given as part of the outreach and open day activities carried out within the University of Bath. The basic principles of the experiment are described as well as the effect of changing the geometry of the rings and their metallurgical state. In general, aluminium rings are…

Baylie, M.; Ford, P. J.; Mathlin, G. P.; Palmer, C.

2009-01-01

401

Planetary ring studies  

NASA Technical Reports Server (NTRS)

The following topics are covered: (1) characterization of the fine scale structure in Saturn's A and B rings; (2) ballistic transport modeling and evolution of fine ring structure; (3) faint features in the rings of Saturn; (4) the Encke moonlet; (5) dynamics in ringmoon systems; (6) a nonclassical radiative transfer model; and (7) particle properties from stellar occultation data.

Cuzzi, Jeffrey N.; Dobrovolskis, Anthony R.; Dones, Luke; Durisen, Richard H.; Horn, Linda; Showalter, Mark R.

1991-01-01

402

Rings Around Uranus  

ERIC Educational Resources Information Center

Events leading up to the discovery of the rings of Uranus are described. The methods used and the logic behind the methods are explained. Data collected to prove the existence of the rings are outlined and theories concerning the presence of planetary rings are presented. (AJ)

Maran, Stephen P.

1977-01-01

403

Evaluating an Exterior Insulation and Finish System for Deep Energy Retrofits  

SciTech Connect

Exterior insulation and finish systems (EIFS) are proprietary synthetic formulations that are applied to the exterior walls of buildings to serve as insulation and exterior cladding. The insulation thickness can vary from less than one inch to a foot or more. In this project the applicability of EIFS for residential deep energy retrofits was investigated through modeling and a case study home. The home was retrofitted using a site-applied four-inch-thick EIFS. Site-specific details were developed as required for the residential retrofit application. Site work and the costs of the EIFS system were documented. The demonstration home was modeled using Building Energy Optimization energy and cost analysis software to explore cost effectiveness of various EIFS insulation thicknesses in two climate locations.

Dentz, J.; Podorson, D.

2014-01-01

404

Implementation of exterior complex scaling in B-splines to solve atomic and molecular collision problems  

SciTech Connect

B-spline methods are now well established as widely applicable tools for the evaluation of atomic and molecular continuum states. The mathematical technique of exterior complex scaling has been shown, in a variety of other implementations, to be a powerful method with which to solve atomic and molecular scattering problems, because it allows the correct imposition of continuum boundary conditions without their explicit analytic application. In this paper, an implementation of exterior complex scaling in B-splines is described that can bring the well-developed technology of B-splines to bear on new problems, including multiple ionization and breakup problems, in a straightforward way. The approach is demonstrated for examples involving the continuum motion of nuclei in diatomic molecules as well as electronic continua. For problems involving electrons, a method based on Poisson's equation is presented for computing two-electron integrals over B-splines under exterior complex scaling.

McCurdy, C. William; Martin, Fernando

2003-11-18

405

Jovian Ring System Mosaic  

NASA Technical Reports Server (NTRS)

NASA's Galileo spacecraft acquired this mosaic of Jupiter's ring system (top) when the spacecraft was in Jupiter's shadow looking back toward the Sun. Jupiter's ring system (inset diagram) is composed of three parts: an outermost gossamer ring, a flat main ring, and an innermost donut-shaped halo. These rings are made up of dust-sized particles that are blasted off of the nearby inner satellites by small impacts. This image was taken on November 9, 1996 at a distance of 2.3 million kilometers (1.4 million miles).

2000-01-01

406

Rotating Rings of Ice  

NSDL National Science Digital Library

This is a lesson about Saturn's rings. Learners will create a three-dimensional model of Saturn and its rings. The model will show the particle nature and structure of the rings. Students also write about the model in this lesson. With the aid of a graphic organizer, students organize their thoughts, then draft and write a paragraph to explain what they know about the ring system. You will need a 2 and 1/2 inch styrofoam ball and some vermiculite for each student. This is lesson 7 of 10 in the Mission to Saturn Educators Guide, Reading Writing Rings, for grades 1-2.

2012-08-03

407

Saturnian Dust Rings Formation  

NASA Astrophysics Data System (ADS)

The saturnian rings system includes tenous rings that are formed by little dust particles coming from different sources such as satellites. It is known that geysers on Enceladus are the main sources of the material that originates the E ring, whereas the ejected particles by impact on the satellites surfaces are the sources of the other tenous rings. Dust particles generated by the last process are distributed around Saturn forming well defined dusty bands that are probably associated with faint rings, as could be the case for the G ring. In this work we use a gravito-electrodynamic model to analyze the dynamics of a single-particle escaping from a satellite surface to the kronian magnetospheric environment. Confinement regions where dust particles could be related to tenous rings are identified from the model solutions. Also, escaping regions could be the regions from where tiny dust particles escape from the saturnian magnetosphere to the interplanetary medium.

Leal-Herrera, J. L.; Maravilla, D.

2013-05-01

408

First Principles Study of Double Photoionization of H2 UsingExterior Complex Scaling  

SciTech Connect

Exterior complex scaling provides a practical path forfirst-principles studies of atomic and molecular ionizationproblemssince it avoids explicit enforcement of asymptotic boundary conditionsfor 3-body Coulomb breakup. We have used the method of exterior complexscaling, implemented with both the discrete variable representation andB-splines, to obtain the first-order wave function for molecular hydrogencorresponding to a single photon having been absorbed by a correlatedinitial state. These wave functions are used to construct convergedtriple differential cross sections for double photoionization of alignedH2 molecules.

Rescigno, Thomas N.; Vanroose, Wim; Horner, Daniel A.; Martin,Fernando; McCurdy, C. William

2006-07-21

409

Planck early results. XXI. Properties of the interstellar medium in the Galactic plane  

Microsoft Academic Search

Planck has observed the entire sky from 30 GHz to 857GHz. The observed foreground emission contains contributions from different phases of the interstellar medium (ISM). We have separated the observed Galactic emission into the different gaseous components (atomic, molecular and ionised) in each of a number of Galactocentric rings. This technique provides the necessary information to study dust properties (emissivity,

A. Abergel; P. A. R. Ade; N. Aghanim; M. Arnaud; M. Ashdown; J. Aumont; C. Baccigalupi; A. Balbi; A. J. Banday; R. B. Barreiro; J. G. Bartlett; E. Battaner; K. Benabed; A. Benoît; J.-P. Bernard; M. Bersanelli; R. Bhatia; J. J. Bock; A. Bonaldi; J. R. Bond; J. Borrill; F. Boulanger; M. Bucher; C. Burigana; P. Cabella; J.-F. Cardoso; A. Catalano; L. Cayón; A. Challinor; A. Chamballu; L.-Y. Chiang; C. Chiang; P. R. Christensen; S. Colombi; F. Couchot; A. Coulais; B. P. Crill; F. Cuttaia; T. M. Dame; L. Danese; R. D. Davies; R. J. Davis; P. de Bernardis; G. de Gasperis; A. de Rosa; G. de Zotti; J. Delabrouille; J.-M. Delouis; F.-X. Désert; C. Dickinson; S. Donzelli; O. Doré; U. Dörl; M. Douspis; X. Dupac; G. Efstathiou; T. A. Enßlin; F. Finelli; O. Forni; M. Frailis; E. Franceschi; S. Galeotta; K. Ganga; M. Giard; G. Giardino; Y. Giraud-Héraud; J. González-Nuevo; K. M. Górski; S. Gratton; A. Gregorio; I. A. Grenier; A. Gruppuso; F. K. Hansen; D. Harrison; S. Henrot-Versillé; D. Herranz; S. R. Hildebrandt; E. Hivon; M. Hobson; W. A. Holmes; W. Hovest; R. J. Hoyland; K. M. Huffenberger; T. R. Jaffe; A. H. Jaffe; W. C. Jones; M. Juvela; E. Keihänen; R. Keskitalo; T. S. Kisner; R. Kneissl; L. Knox; H. Kurki-Suonio; G. Lagache; A. Lähteenmäki; J.-M. Lamarre; A. Lasenby; R. J. Laureijs; C. R. Lawrence; S. Leach; R. Leonardi; C. Leroy; P. B. Lilje; M. Linden-Vørnle; M. López-Caniego; P. M. Lubin; J. F. Macías-Pérez; C. J. MacTavish; B. Maffei; N. Mandolesi; R. Mann; M. Maris; D. J. Marshall; E. Martínez-González; S. Masi; S. Matarrese; F. Matthai; P. Mazzotta; P. McGehee; P. R. Meinhold; A. Melchiorri; L. Mendes; A. Mennella; M.-A. Miville-Deschênes; A. Moneti; L. Montier; G. Morgante; D. Mortlock; D. Munshi; A. Murphy; P. Naselsky; P. Natoli; C. B. Netterfield; H. U. Nørgaard-Nielsen; F. Noviello; D. Novikov; I. Novikov; S. Osborne; F. Pajot; R. Paladini; F. Pasian; G. Patanchon; O. Perdereau; L. Perotto; F. Perrotta; F. Piacentini; M. Piat; S. Plaszczynski; E. Pointecouteau; G. Polenta; N. Ponthieu; T. Poutanen; G. Prézeau; S. Prunet; J.-L. Puget; J. P. Rachen; W. T. Reach; R. Rebolo; W. Reich; C. Renault; S. Ricciardi; T. Riller; I. Ristorcelli; G. Rocha; C. Rosset; J. A. Rubiño-Martín; B. Rusholme; M. Sandri; D. Santos; G. Savini; D. Scott; M. D. Seiffert; P. Shellard; G. F. Smoot; J.-L. Starck; F. Stivoli; V. Stolyarov; R. Stompor; R. Sudiwala; J.-F. Sygnet; J. A. Tauber; L. Terenzi; L. Toffolatti; M. Tomasi; J.-P. Torre; M. Tristram; J. Tuovinen; G. Umana; L. Valenziano; J. Varis; P. Vielva; F. Villa; N. Vittorio; L. A. Wade; B. D. Wandelt; A. Wilkinson; N. Ysard; D. Yvon; A. Zacchei; A. Zonca

2011-01-01

410

The galactic distribution of carbon monoxide: An out-of-plane survey. Ph.D. Thesis  

NASA Technical Reports Server (NTRS)

Galactic CO line emission at 115 GHz has been surveyed. This survey confirms the finding that CO is concentrated in a ring. It provides a determination of the thickness of this molecular ring as a function of galactic radius and shows that CO is displaced from the conventional galactic plane. These results were arrived at by least-squares fitting the survey data to a circularly symmetric model of the Galaxy. A comparison of the CO and HI distributions shows that there are marked differences in the distributions of these species, both radially and out of the plane. A detailed discussion of the antenna characteristics, including the radiation pattern and pointing characteristics is presented.

Cohen, R. S.

1978-01-01

411

Elusive active galactic nuclei  

NASA Astrophysics Data System (ADS)

A fraction of active galactic nuclei do not show the classical Seyfert-type signatures in their optical spectra, i.e. they are optically `elusive'. X-ray observations are an optimal tool to identify this class of objects. We combine new Chandra observations with archival X-ray data in order to obtain a first estimate of the fraction of elusive active galactic nuclei (AGN) in local galaxies and to constrain their nature. Our results suggest that elusive AGN have a local density comparable to or even higher than optically classified Seyfert nuclei. Most elusive AGN are heavily absorbed in the X-rays, with gas column densities exceeding 1024 cm-2, suggesting that their peculiar nature is associated with obscuration. It is likely that in elusive AGN the nuclear UV source is completely embedded and the ionizing photons cannot escape, which prevents the formation of a classical narrow-line region. Elusive AGN may contribute significantly to the 30-keV bump of the X-ray background.

Maiolino, R.; Comastri, A.; Gilli, R.; Nagar, N. M.; Bianchi, S.; Böker, T.; Colbert, E.; Krabbe, A.; Marconi, A.; Matt, G.; Salvati, M.

2003-10-01

412

Galactic cold cores  

NASA Astrophysics Data System (ADS)

The project Galactic Cold Cores is studying the early stages of Galactic star formation using far-infrared and sub-millimetre observations of dust emission. The Planck satellite has located many sources of cold dust emission that are likely to be pre-stellar clumps in interstellar clouds. We have mapped a sample of Planck-detected clumps with the Herschel satellite at wavelengths 100-500 ?m. Herschel has confirmed the Planck detections of cold dust and have revealed a significant amount of sub-structure in the clumps. The cloud cores have colour temperatures in the range of 10-15 K. However, star formation is often already in progress with cold clumps coinciding with mid-infrared point sources. In less than half of the cases, the cloud morphology is clearly dominated by filamentary structures. The sources include both nearby isolated globules and more distant, massive clouds that may be off-the-plane counterparts of infrared dark clouds. The Herschel observations have been completed and the processed maps will be released to the community in 2013.

Juvela, M.

2015-03-01

413

The Galactic Magnetic Field  

NASA Astrophysics Data System (ADS)

With this Letter, we complete our model of the Galactic magnetic field (GMF), by using the WMAP7 22 GHz total synchrotron intensity map and our earlier results to obtain a 13-parameter model of the Galactic random field, and to determine the strength of the striated random field. In combination with our 22-parameter description of the regular GMF, we obtain a very good fit to more than 40,000 extragalactic Faraday rotation measures and the WMAP7 22 GHz polarized and total intensity synchrotron emission maps. The data call for a striated component to the random field whose orientation is aligned with the regular field, having zero mean and rms strength ?20% larger than the regular field. A noteworthy feature of the new model is that the regular field has a significant out-of-plane component, which had not been considered earlier. The new GMF model gives a much better description of the totality of data than previous models in the literature.

Jansson, Ronnie; Farrar, Glennys R.

2012-12-01

414

THE GALACTIC MAGNETIC FIELD  

SciTech Connect

With this Letter, we complete our model of the Galactic magnetic field (GMF), by using the WMAP7 22 GHz total synchrotron intensity map and our earlier results to obtain a 13-parameter model of the Galactic random field, and to determine the strength of the striated random field. In combination with our 22-parameter description of the regular GMF, we obtain a very good fit to more than 40,000 extragalactic Faraday rotation measures and the WMAP7 22 GHz polarized and total intensity synchrotron emission maps. The data call for a striated component to the random field whose orientation is aligned with the regular field, having zero mean and rms strength Almost-Equal-To 20% larger than the regular field. A noteworthy feature of the new model is that the regular field has a significant out-of-plane component, which had not been considered earlier. The new GMF model gives a much better description of the totality of data than previous models in the literature.

Jansson, Ronnie; Farrar, Glennys R. [Center for Cosmology and Particle Physics, Department of Physics, New York University, New York, NY 10003 (United States)

2012-12-10

415

ccsd00000707 GALACTIC HYDRAULIC DROP?  

E-print Network

). #12; Figure 1: The circular hydraulic jump, as observed in any kitchen sink. The water chooses oneccsd­00000707 (version 1) : 10 Oct 2003 GALACTIC HYDRAULIC DROP? STEEN H. HANSEN University a break at some characteristic radius, providing us with a galactic hydraulic drop. In the #12;eld

416

Three Galactic globular cluster candidates  

Microsoft Academic Search

Context. The census of Galactic globular clusters (GCs) is still incomplete, and about ten new objects are supposed to await discovery, hidden behind the crowded and reddened regions of the Galactic bulge and disk. Aims: We investigated the nature of three new GC candidates, discovered in the frames collected by the Vista Variables in the Via Lactea (VVV) near-infrared survey.

C. Moni Bidin; F. Mauro; D. Geisler; D. Minniti; M. Catelan; M. Hempel; E. Valenti; A. A. R. Valcarce; J. Alonso-García; J. Borissova; G. Carraro; P. Lucas; A.-N. Chené; M. Zoccali; R. G. Kurtev

2011-01-01

417

Testing Galactic Cosmic Ray Models  

NASA Technical Reports Server (NTRS)

Models of the Galactic Cosmic Ray Environment are used for designing and planning space missions. The exising models will be reviewed. Spectral representations from these models will be compared with measurements of galactic cosmic ray spectra made on balloon flights and satellite flights over a period of more than 50 years.

Adams, James H., Jr.

2010-01-01

418

Galactic cosmic rays and nucleosynthesis  

SciTech Connect

The nucleosynthesis of the light elements Li, Be and B by galactic cosmic rays is presented. Observations of cosmic rays and the nuclear reactions responsible for Li, Be and B nucleosynthesis are described, followed by some words on propagation. At the end, some open questions concerning galactic cosmic rays are discussed.

Kiener, Juergen [CSNSM, CNRS-IN2P3 and Universite Paris-Sud, Bat. 104-108, 91405 Orsay Campus (France)

2010-03-01

419

Testing Galactic Cosmic Ray Models  

NASA Technical Reports Server (NTRS)

Models of the Galactic Cosmic Ray Environment are used for designing and planning space missions. The existing models will be reviewed. Spectral representations from these models will be compared with measurements of galactic cosmic ray spectra made on balloon flights and satellite flights over a period of more than 50 years.

Adams, James H., Jr.

2009-01-01

420

The Ring Current  

NASA Technical Reports Server (NTRS)

It is proposed that the quiet-time ring current consists of two parts, the inner ring current imbedded deeply inside the plasmapause and the outer ring current flowing in the plasma sheet. The source of the inner ring current appears to be trapped protons with energies 100 keV to several hundred keV having their peak intensity at 3 to 4 R sub e. The dominant source of the outer ring current is the population of protons with energy near 50 keV in the plasma sheet, as in Frank's (1967) model for the extraterrestrial ring current. The outer ring current is an innermost part of the tail current, and the inner ring current is its earthward extension. The plasma pressure is nearly continuous from the plasma sheet to the inner current ring region. When the plasma sheet moves inward during a substorm, the plasma pressure increase is directly conveyed to inside the plasmasphere and intensifies the inner ring current.

Sugiura, M.

1972-01-01

421

APOSTERIORI error estimates for linear exterior problemsVIA mixed-FEM and DtN mappings  

Microsoft Academic Search

In this paper we combine the dual-mixed nite element method with a Dirichlet-to- Neumann mapping (given in terms of a boundary integral operator) to solve linear exterior transmission problems in the plane. As a model we consider a second order elliptic equation in divergence form coupled with the Laplace equation in the exterior unbounded region. We show that the resulting

Mauricio A. Barrientos; Gabriel N. Gatica; Matthias Maischak

2002-01-01

422

Rings and Radial Waves in the Disk of the Milky Way  

NASA Astrophysics Data System (ADS)

We show that in the anticenter region, between Galactic longitudes of 110° < l < 229°, there is an oscillating asymmetry in the main-sequence star counts on either side of the Galactic plane using data from the Sloan Digital Sky Survey. This asymmetry oscillates from more stars in the north at distances of about 2 kpc from the Sun to more stars in the south at 4-6 kpc from the Sun to more stars in the north at distances of 8-10 kpc from the Sun. We also see evidence that there are more stars in the south at distances of 12-16 kpc from the Sun. The three more distant asymmetries form roughly concentric rings around the Galactic center, opening in the direction of the Milky Way’s spiral arms. The northern ring, 9 kpc from the Sun, is easily identified with the previously discovered Monoceros Ring. Parts of the southern ring at 14 kpc from the Sun (which we call the TriAnd Ring) have previously been identified as related to the Monoceros Ring, and others have been called the Triangulum Andromeda Overdensity. The two nearer oscillations are approximated by a toy model in which the disk plane is offset by the order of 100 pc up and then down at different radii. We also show that the disk is not azimuthally symmetric around the Galactic anticenter and that there could be a correspondence between our observed oscillations and the spiral structure of the Galaxy. Our observations suggest that the TriAnd and Monoceros Rings (which extend to at least 25 kpc from the Galactic center) are primarily the result of disk oscillations.

Xu, Yan; Newberg, Heidi Jo; Carlin, Jeffrey L.; Liu, Chao; Deng, Licai; Li, Jing; Schönrich, Ralph; Yanny, Brian

2015-03-01

423

Exterior view of south wall of Oxidizer Conditioning Structure (T28D), ...  

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

Exterior view of south wall of Oxidizer Conditioning Structure (T-28D), looking north. The taller structure immediately to the rear in the upper left background is the Long-Term Oxidizer Silo (T-28B) - Air Force Plant PJKS, Systems Integration Laboratory, Oxidizer Conditioning Structure, Waterton Canyon Road & Colorado Highway 121, Lakewood, Jefferson County, CO

424

Exterior view of west wall of LongTerm Oxidizer Silo (T28B) ...  

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

Exterior view of west wall of Long-Term Oxidizer Silo (T-28B) at left (taller structure) and adjacent Oxidizer Conditioning Structure (T-28D) at right (lower structure) - Air Force Plant PJKS, Systems Integration Laboratory, Long-Term Oxidizer Silo, Waterton Canyon Road & Colorado Highway 121, Lakewood, Jefferson County, CO

425

Meshless boundary element methods for exterior problems on spheroids E.P.Stephan1  

E-print Network

Meshless boundary element methods for exterior problems on spheroids E.P.Stephan1 , A.Costea1 ,Q equations, meshless methods, preconditioning, domain decomposition Abstract. In geophysical applications one equation arising from the Dirichlet-to-Neumann map. Our meshless approach with radial basis functions

Lê Gia, Quôc Thông

426

Sustainable wall construction and exterior insulation retrofit technology process and structure  

DOEpatents

A low-cost process for exterior wall insulation retrofit, or new wall construction by stacking layers of fabric tube filled with insulating material against a wall and covering them with mesh and stucco provides a durable structure with good insulating value.

Vohra, Arun (Bethesda, MD)

2000-01-01

427

24. EXTERIOR VIEW OF BUILDING 24C (SHOP AND ENGINEERING BUILDING), ...  

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

24. EXTERIOR VIEW OF BUILDING 24C (SHOP AND ENGINEERING BUILDING), LOOKING NORTHWEST (1991). - Wright-Patterson Air Force Base, Area B, Buildings 25 & 24,10-foot & 20-foot Wind Tunnel Complex, Northeast side of block bounded by K, G, Third, & Fifth Streets, Dayton, Montgomery County, OH

428

25. EXTERIOR WEST VIEW OF STORAGE TANK (1991). WrightPatterson ...  

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

25. EXTERIOR WEST VIEW OF STORAGE TANK (1991). - Wright-Patterson Air Force Base, Area B, Buildings 25 & 24,10-foot & 20-foot Wind Tunnel Complex, Northeast side of block bounded by K, G, Third, & Fifth Streets, Dayton, Montgomery County, OH

429

20. EXTERIOR WEST VIEW, SHOWING CRANE SYSTEM (1991). WrightPatterson ...  

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

20. EXTERIOR WEST VIEW, SHOWING CRANE SYSTEM (1991). - Wright-Patterson Air Force Base, Area B, Buildings 25 & 24,10-foot & 20-foot Wind Tunnel Complex, Northeast side of block bounded by K, G, Third, & Fifth Streets, Dayton, Montgomery County, OH

430

5. Exterior view of Components Test Laboratory (T27), looking northwest. ...  

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

5. Exterior view of Components Test Laboratory (T-27), looking northwest. The building wing on the left houses Test Cell 10 (environmental), and that on the right houses Test Cell 9 (fuel) and the fuel storage pit or vault. - Air Force Plant PJKS, Systems Integration Laboratory, Components Test Laboratory, Waterton Canyon Road & Colorado Highway 121, Lakewood, Jefferson County, CO

431

4. Exterior view of Components Test Laboratory (T27), looking northeast. ...  

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

4. Exterior view of Components Test Laboratory (T-27), looking northeast. The building wing on the left houses Test Cell 8 (oxidizer) and the oxidizer storage pit or vault, and that on the right houses Test Cell 10 (environmental). - Air Force Plant PJKS, Systems Integration Laboratory, Components Test Laboratory, Waterton Canyon Road & Colorado Highway 121, Lakewood, Jefferson County, CO

432

1. EXTERIOR VIEW OF BUILDING 25A (COLD CHAMBER), LOOKING NORTHEAST, ...  

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

1. EXTERIOR VIEW OF BUILDING 25A (COLD CHAMBER), LOOKING NORTHEAST, WITH WIND TUNNEL IN BACKGROUND (1991). - Wright-Patterson Air Force Base, Area B, Buildings 25 & 24,10-foot & 20-foot Wind Tunnel Complex, Northeast side of block bounded by K, G, Third, & Fifth Streets, Dayton, Montgomery County, OH

433

2. EXTERIOR VIEW OF BUILDING 25B (TEST CHAMBER BUILDING) AND ...  

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

2. EXTERIOR VIEW OF BUILDING 25B (TEST CHAMBER BUILDING) AND WIND TUNNEL, LOOKING NORTHWEST (1991). - Wright-Patterson Air Force Base, Area B, Buildings 25 & 24,10-foot & 20-foot Wind Tunnel Complex, Northeast side of block bounded by K, G, Third, & Fifth Streets, Dayton, Montgomery County, OH

434

Proceedings of Thermal VII, Thermal Performance of the Exterior Envelopes of Buildings,  

E-print Network

LBNL-42871 BS-400 Proceedings of Thermal VII, Thermal Performance of the Exterior Envelopes locations. The user describes the physical, thermal and optical properties of the windows in each orientation, solar heat gain reductions due to obstructions, overhangs, or shades, and the location

435

INTERIOR AND EXTERIOR PROBLEMS OF COUPLE-STRESS AND CLASSICAL ELASTOSTATICS WITH GIVEN FRICTION  

Microsoft Academic Search

We consider an interior problem of statics of couple-stress elastic- ity for anisotropic nonhomogeneous media with friction taken into account and the corresponding exterior problem for homogeneous isotropic media. The question of the existence and uniqueness of weak solutions of these prob- lems is studied when friction forces occur along the boundary of an elastic medium or on some part

ROLAND GACHECHILADZE

2005-01-01

436

3. Exterior view of LongTerm Hydrazine Silo (T28E), looking southwest. ...  

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

3. Exterior view of Long-Term Hydrazine Silo (T-28E), looking southwest. The low-lying building to the immediate left of the silo is the Fuel Purification Structure (T-28E). - Air Force Plant PJKS, Systems Integration Laboratory, Long-Term Hydrazine Silo, Waterton Canyon Road & Colorado Highway 121, Lakewood, Jefferson County, CO

437

4. Exterior view of LongTerm Hydrazine Silo (T28E), looking west. ...  

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

4. Exterior view of Long-Term Hydrazine Silo (T-28E), looking west. The low-lying building to the immediate left of the silo is the Fuel Purification Structure (T-28E). - Air Force Plant PJKS, Systems Integration Laboratory, Long-Term Hydrazine Silo, Waterton Canyon Road & Colorado Highway 121, Lakewood, Jefferson County, CO

438

2. Exterior view of LongTerm Hydrazine Silo (T28E), looking east. ...  

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

2. Exterior view of Long-Term Hydrazine Silo (T-28E), looking east. The low-lying building to the immediate right of the silo is the Fuel Purification Structure T-28E). - Air Force Plant PJKS, Systems Integration Laboratory, Long-Term Hydrazine Silo, Waterton Canyon Road & Colorado Highway 121, Lakewood, Jefferson County, CO

439

2. Exterior view of Components Test Laboratory (T27), looking southeast. ...  

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

2. Exterior view of Components Test Laboratory (T-27), looking southeast. The building wing on the left houses the equipment room and that on the right houses Test Cell 8 (oxidizer) and the oxidizer storage pit or vault. - Air Force Plant PJKS, Systems Integration Laboratory, Components Test Laboratory, Waterton Canyon Road & Colorado Highway 121, Lakewood, Jefferson County, CO

440

3. Exterior view of Components Test Laboratory (T27), looking southeast. ...  

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

3. Exterior view of Components Test Laboratory (T-27), looking southeast. The building wing on the left houses the equipment room, and that on the right houses Test Cell 8 (oxidizer) and the oxidizer storage pit or vault. - Air Force Plant PJKS, Systems Integration Laboratory, Components Test Laboratory, Waterton Canyon Road & Colorado Highway 121, Lakewood, Jefferson County, CO

441

Introduction This work is concerned with the exterior structural acoustics problem involving the  

E-print Network

Chapter 1 Introduction This work is concerned with the exterior structural acoustics problem involving the interaction of vibrating structures submerged in an infinite acoustic fluid and requires solution of the coupled wave equation subject to a far­field radiation condition. The acoustic fluid

Thompson, Lonny L.

442

On a robust BEM formulation for the Dirichlet problem of exterior stokes flow  

E-print Network

On a robust BEM formulation for the Dirichlet problem of exterior stokes flow A. Frangi; Damping Forces; BEM 1. Introduction The numerical simulation of complex micro-structures (MEMS simplifying the simulation. If these hypotheses are accepted the boundary element method (BEM) is highly

Frangi, Attilio

443

Boundary conditions for the numerical solution of elliptic equations in exterior regions  

Microsoft Academic Search

Elliptic equations in exterior regions frequently require a boundary condition at infinity to ensure the well-posedness of the problem. Examples of practical applications include the Helmholtz equation and Laplace's equation. Computational procedures based on a direct discretization of the elliptic problem require the replacement of the condition at infinity by a boundary condition on a finite artificial surface. Direct imposition

Alvin Bayliss; Max Gunzburger; Eli Turkel

1982-01-01

444

OBLIQUE/EXTERIOR VIEW, LOOKING NORTHEAST, WITH SINTERING PLANT RUINS AND TRACES ...  

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

OBLIQUE/EXTERIOR VIEW, LOOKING NORTHEAST, WITH SINTERING PLANT RUINS AND TRACES OF L. & N. RAILROAD EXTENDING THROUGH GRACE'S GAP TOWARD THE BIRMINGHAM CITY CENTER. - Republic Steel, Spaulding Red Ore Mine (Ruins), Spanning Grace's Pass at Louisville & Nashville Railroad, Birmingham, Jefferson County, AL

445

Model for Naturally Ventilated Cavities on the Exteriors of Opaque Building Thermal Envelopes  

SciTech Connect

This paper describes a model for naturally ventilated cavities on the exterior of opaque building thermal envelopes that are formed by the presence of a lightweight baffle. The model can be used for building components that are slightly detached from the main envelope (but do not connect to the interior).

Griffith, B.

2006-11-01

446

Initial and Long-Term Movement of Cladding Installed Over Exterior Rigid Insulation  

SciTech Connect

Changes in the International Energy Conservation Code (IECC) from 2009 to 2012 have resulted in the use of exterior rigid insulation becoming part of the prescriptive code requirements. With more jurisdictions adopting the 2012 IECC builders are going to finding themselves required to incorporate exterior insulation in the construction of their exterior wall assemblies. For thick layers of exterior insulation (levels greater than 1.5 inches), the use wood furring strips attached through the insulation back to the structure has been used by many contractors and designers as a means to provide a convenient cladding attachment location. However, there has been a significant resistance to its widespread implementation due to a lack of research and understanding of the mechanisms involved and potential creep effects of the assembly under the sustained dead load of a cladding. This research was an extension on previous research conducted by BSC in 2011, and 2012. Each year the understanding of the system discrete load component interactions, as well as impacts of environmental loading has increased. The focus of the research was to examine more closely the impacts of screw fastener bending on the total system capacity, effects of thermal expansion and contraction of materials on the compressive forces in the assembly, as well as to analyze a full years worth of cladding movement data from assemblies constructed in an exposed outdoor environment.

Baker, P.

2014-09-01

447

19. EXTERIOR VIEW OF BUILDING 24A (POWER BUILDING), LOOKING NORTH ...  

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

19. EXTERIOR VIEW OF BUILDING 24A (POWER BUILDING), LOOKING NORTH (1991). - Wright-Patterson Air Force Base, Area B, Buildings 25 & 24,10-foot & 20-foot Wind Tunnel Complex, Northeast side of block bounded by K, G, Third, & Fifth Streets, Dayton, Montgomery County, OH

448

A&M. Jet engine test building (TAN609). Exterior. Equipment inside rollup ...  

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

A&M. Jet engine test building (TAN-609). Exterior. Equipment inside roll-up door is blowdown test facility, part of loft-semiscale program. Note width of central section serving as blast protection for operator on left side. Photographer: Cahoon. Date: July 22, 1965. INEEL negative no. 65-3703 - Idaho National Engineering Laboratory, Test Area North, Scoville, Butte County, ID

449

Exterior direct detail view of 2nd floor balcony at west ...  

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

Exterior direct detail view of 2nd floor balcony at west side of Building 6, showing curved concrete rail and tapered concrete column, looking north - North Beach Place, 401 Bay Street, 500 Francisco Street, 401 Bay Street, 500 Francisco Street, San Francisco, San Francisco County, CA

450

2. Exterior view of Systems Integration Laboratory Building (T28), looking ...  

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

2. Exterior view of Systems Integration Laboratory Building (T-28), looking southwest. The low-lying concrete Signal Transfer Building (T-28A) is located in the immediate foreground. - Air Force Plant PJKS, Systems Integration Laboratory, Systems Integration Laboratory Building, Waterton Canyon Road & Colorado Highway 121, Lakewood, Jefferson County, CO

451

Finite element methods for the Helmholtz equation in an exterior domain - Model problems  

Microsoft Academic Search

Finite element methods are presented for the reduced wave equation in unbounded domains. Model problems of radiation with inhomogeneous Neumann boundary conditions, including the effects of a moving acoustic medium, are examined for the entire range of propagation and decay. Exterior boundary conditions for the computational problem over a finite domain are derived from an exact relation between the solution

Isaac Harari; Thomas J. R. Hughes

1991-01-01

452

LPT. Shield test facility (TAN646) exterior, as modified for EBOR. ...  

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

LPT. Shield test facility (TAN-646) exterior, as modified for EBOR. Camera facing northeast. Heat exchange fans, helium storage tanks, and completed EBOR perimeter road. Photographer: Page Comisky. Date: ca. August 20, 1965. INEEL negative no. 65-4328 - Idaho National Engineering Laboratory, Test Area North, Scoville, Butte County, ID

453

Global existence results for Oldroyd-B fluids in exterior domains  

NASA Astrophysics Data System (ADS)

In this paper we consider the set of equations describing Oldroyd-B fluids in exterior domains. It is shown that these equations admit a unique, global solution defined in a certain function space provided the initial data and the coupling constant are small enough.

Hieber, Matthias; Naito, Yuka; Shibata, Yoshihiro

454

JOURNAL OF STRUCTURAL ENGINEERING / OCTOBER 2000 / 1113 SEISMIC RESPONSE OF EXTERIOR RC COLUMN-TO-STEEL  

E-print Network

JOURNAL OF STRUCTURAL ENGINEERING / OCTOBER 2000 / 1113 SEISMIC RESPONSE OF EXTERIOR RC COLUMN-TO-STEEL: The inelastic cyclic response of hybrid connections consisting of RC columns and steel beams (RCS) is studied of the steel beams, steel band plates or cover plates surrounding the joint region, steel fiber concrete

Parra-Montesinos, Gustavo J.

455

Augmented Reality for Exterior Construction Applications Gudrun Klinker (1), Didier Stricker (2), Dirk Reiners (2)  

E-print Network

Augmented Reality for Exterior Construction Applications Gudrun Klinker (1), Didier Stricker (2 Arcisstr. 21, D-80290 München (2) Fraunhofer Projektgruppe für Augmented Reality am ZGDV, Rundeturmstr. 6, D-64283 Darmstadt, Germany Abstract Augmented reality (AR) constitutes a very promising new user

Bruegge, Bernd

456

Exterior of 79th Street Rotunda from Riverside Park waterfront promenade ...  

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

Exterior of 79th Street Rotunda from Riverside Park waterfront promenade (Hudson River Valley Greenway), looking south. - Henry Hudson Parkway, Extending 11.2 miles from West 72nd Street to Bronx-Westchester border, New York, New York County, NY

457

Heavy Nuclear Rings  

NASA Astrophysics Data System (ADS)

For energies near one GeV/nucleon, transport calculations (BUU)(E. Norbeck, Q.Z. Luo, Y.W. Cheng, P. Pogodin and F.D. Ingram, Nuc. Phys. A 607 (1996) 105.) show the formation of ring shaped structures for central collisions of small, ^12C to ^20Ne, nuclei with ^238U. The rings are formed by the small nucleus punching a hole through the center. They persist for 100 fm/c or so and then fragment. At early times there are the beginnings of a vortex motion where the center of the ring moves in the direction of the light nucleus and the outside moves in the opposite direction. This motion does not fully develop and is gone entirely by the time the ring fragments. Early in the collision the nucleons from the small nucleus are completely dispersed. By the time the ring appears the kinetic temperature has become uniform throughout the body of the ring.

Norbeck, Edwin; Cheng, Yun-Wu; Luo, Qing-Zheng; Ingram, Duane

1997-10-01

458

Galactic Hearts of Glass  

NASA Technical Reports Server (NTRS)

[figure removed for brevity, see original site] Click on image for larger graph

This artist's concept shows delicate greenish crystals sprinkled throughout the violent core of a pair of colliding galaxies. The white spots represent a thriving population of stars of all sizes and ages. NASA's Spitzer Space Telescope detected more than 20 bright and dusty galactic mergers like the one depicted here, all teeming with the tiny gem-like crystals.

When galaxies collide, they trigger the birth of large numbers of massive stars. Astronomers believe these blazing hot stars act like furnaces to produce silicate crystals in the same way that glass is made from sand. The stars probably shed the crystals as they age, and as they blow apart in supernovae explosions.

At the same time the crystals are being churned out, they are also being destroyed. Fast-moving particles from supernova blasts easily convert silicates crystals back to their amorphous, or shapeless, form.

How is Spitzer seeing the crystals if they are rapidly disappearing? Astronomers say that, for a short period of time at the beginning of galactic mergers, massive stars might be producing silicate crystals faster than they are eliminating them. When our own galaxy merges with the Andromeda galaxy in a few billion years, a similar burst of massive stars and silicate crystals might occur.

Crystal Storm in Distant Galaxy The graph (see inset above) of infrared data from NASA's Spitzer Space Telescope tells astronomers that a distant galaxy called IRAS 08752+3915 is experiencing a storm of tiny crystals made up of silicates. The crystals are similar to the glass-like grains of sand found on Earth's many beaches.

The data were taken by Spitzer's infrared spectrograph, which splits light open to reveal its rainbow-like components. The resulting spectrum shown here reveals the signatures of both crystalline (green) and non-crystalline (brown) silicates.

Spitzer detected the same crystals in 20 additional galaxies, all belonging to a class called ultraluminous infrared galaxies. These extremely bright and dusty galaxies usually consist of two galaxies in the process of smashing into each other. Astronomers believe massive stars at the hearts of the galaxies are churning out clouds of silicate crystals. This phenomenon may represent a short-lived phase in the evolution of galactic mergers.

2006-01-01

459

Transition from Galactic to Extra-Galactic Cosmic Rays  

E-print Network

In this paper we review the main features of the observed Cosmic Rays spectrum in the energy range $10^{17} {\\rm eV}~\\div~10^{20} {\\rm eV}$. We present a theoretical model that explains the main observed features of the spectrum, namely the second Knee and Dip, and implies a transition from Galactic to Extra-Galactic cosmic rays at energy $E\\simeq 10^{18}$ eV, with a proton dominated Extra-Galactic spectrum.

Roberto Aloisio

2006-02-03

460

The Planetary Rings Node  

NSDL National Science Digital Library

The Planetary Rings Node of the Planetary Data System is devoted to archiving, cataloging and distributing scientific data sets relevant to planetary ring systems. In addition to data sets, this site offers on-line tools for planning, acquiring and interpreting ring observations and downloadable routines for calculations of orbital motion and time conversions. There are also images, animations and artwork of Jupiter, Saturn, Uranus, and Neptune.

461

Semigroups and ring endomorphisms  

E-print Network

SEMIGROUPS AND RING ENDOMORPHISMS A Thesis by Johnnie Carl McDaniel Submitted to the Graduate College of Texas A&M University in partial fulfillment of the requirement for the degree of MASTER OF SCIENCE December 1971 Major Subject...: Mathematics SEMIGROUPS AND RING ENDOMORPHISMS A Thesis by Johnnie Carl McDaniel Approved as to style and content by: (Chairma of Committee) Head of Department Member Member Member (M ber Member December 1971 ABSTRACT Semigroups and Ring...

McDaniel, Johnnie Carl

1971-01-01

462

Tilting at Tilted Rings  

NASA Astrophysics Data System (ADS)

Saturn's D (Hedman et al. 2007) and C (Hedman et al. 2010) rings display sinusoidal brightness variations in which the radial wavelength increases smoothly with distance from the planet. These structures likely represent 2-200m vertical corrugations that arose due to differential nodal regression (driven by Saturn's higher-order gravity harmonics) of an initially flat, tilted ring. Jupiter's rings exhibit similar features (Showalter et al., this meeting). The spatial and temporal behaviors of these patterns imply that the ring's angular momentum vector shifted by about 10-7 radians relative to that of the planet in mid-1984; after that date, the once-flat ring subsequently wound up. We consider scenarios in which the inner parts of Saturn's ring system were tilted relative to the planet's equator by the impact of external material moving at several tens of km/sec. In order for the angular momentum to be distributed across many thousand kilometers, the interplanetary projectile must first fragment (tidally or collisionally) into many pieces. This permits a wide swath of ring to be eventually struck by smaller debris. Even though much of the ring is hit, planetary shadowing and gravitational focusing allow angular momentum to be emplaced non-uniformly in longitude, such that the net angular momentum has a component in the ring plane. To produce the necessary tilt, the impactor must be >/ 1 km in radius, the size of a small comet nucleus. We estimate that comets this big could pass close enough to Saturn for disruption at 2% of Jupiter's impact rate. Accordingly, Saturn's rings could potentially be tilted every 500-10,000 yrs. We have explored other possible scenarios for tilting the rings (e.g., direct hits of large ring particles, atmospheric break-up, and changes in Saturn's mass distribution that shift the planet's inertia tensor). Currently, they seem even less plausible.

Burns, Joseph A.; Hedman, M. M.; Showalter, M. R.

2010-10-01

463

Modified spiral wound retaining ring  

NASA Technical Reports Server (NTRS)

A spiral wound retaining ring with angled ends is described. The ring is crimped at the same angle as the ring ends to maintain a constant thickness dimension. The angling of the ends of the ring and crimp allow the ends to be positioned closer together while maintaining enough clearance to enable insertion and removal of the ring. By reducing the separation distance between the ends a stronger ring results since the double layer area of the ring is maximized.

Lawson, A. G. (inventor)

1980-01-01

464

Some statistics of Galactic SNRs  

E-print Network

The selection effects applicable to the identification of Galactic supernova remnants (SNRs) at radio wavelengths are discussed. Low surface brightness remnants are missing, as are those with small angular sizes (including young but distant SNRs). Several statistical properties of Galactic SNRs are discussed, including the surface-brightness/diameter (Sigma-D) relation. The wide range of intrinsic properties of Galactic remnants with known distances, and the observational selection effects, means that the Sigma-D relation is of limited use to derive diameters and hence distances for individual SNRs, or for statistical studies.

D. A. Green

2005-05-20

465

Extrasolar Planets: A Galactic Perspective  

E-print Network

The host stars of extrasolar planets tend to be metal-rich. We have examined the data for these stars for evidence of trends in other galactic parameters, without success. However, several ESP hosts are likely to be members of the thick disk population, indicating that planet formation has occurred throughout the full lifetime of the Galactic disk. We briefly consider the radial metallicity gradient and age-metallicity relation of the Galactic disk, and complete a back-of-the envelope estimate of the likely number of solar-type stars with planetary companions with 6 < R < 10 kpc.

I. N. Reid

2006-08-15

466

Star formation and stellar populations across nuclear rings in galaxies  

E-print Network

(Abridged) We present a study of the optical spectra of a sample of eight star-forming nuclear rings and the nuclei of their host galaxies. The spectra were obtained with the ISIS spectrograph on the William Herschel Telescope and cover a wide range in wavelength, enabling the measurement of several stellar absorption features and gas emission lines. We compared the strength of the absorption lines to a variety of population synthesis models for the star-formation history in the nuclear rings, including also the contribution of the older bulge and disc stellar components. We find that the stars in our sample of nuclear rings have most likely formed over a prolonged period of time characterised by episodic bursts of star-formation activity. Constant star formation is firmly ruled out by the data, whereas a one-off formation event is an unlikely explanation for a common galactic component such as nuclear rings. We have used emission-line measurements to constrain the physical conditions of the ionised gas within the rings. Emission in all nuclear rings originates from HII-regions with electron densities typical for these kinds of objects, and that the rings are characterised by values for the gas metallicity ranging from slightly below to just above solar. As 20% of nearby spiral galaxies hosts nuclear rings that are currently forming massive stars, our finding of an episodic star formation history in nuclear rings implies that a significant population remains to be identified of young nuclear rings that are not currently in a massive star formation phase.

M. Sarzi; E. L. Allard; J. H. Knapen; L. M. Mazzuca

2007-07-04

467

The end of the Galactic spectrum  

E-print Network

We use a diffusion galactic model to analyze the end of the Galactic cosmic ray spectrum and its mixing with the extragalactic cosmic ray flux. We analyze the transition between Galactic and extragalactic components using two different extragalactic models. We compare the sum of the diffusive galactic spectrum and extragalactic spectrum with the available experimental data.

C. De Donato; G. A. Medina-Tanco

2007-10-18

468

Planetary rings - Theory  

Microsoft Academic Search

Theoretical models of planetary-ring dynamics are examined in a brief analytical review. The mathematical description of streamlines and streamline interactions is outlined; the redistribution of angular momentum due to collisions between particles is explained; and problems in the modeling of broad, narrow, and arc rings are discussed.

Nicole Borderies

1989-01-01

469

EBT ring physics  

SciTech Connect

This workshop attempted to evaluate the status of the current experimental and theoretical understanding of hot electron ring properties. The dominant physical processes that influence ring formation, scaling, and their optimal behavior are also studied. Separate abstracts were prepared for each of the 27 included papers. (MOW)

Uckan, N.A. (ed.)

1980-04-01

470

Birth Control Ring  

MedlinePLUS

... It? The birth control ring is a soft, flexible, doughnut-shaped ring about 2 inches (5 centimeters) in diameter. It is inserted into the vagina, where it slowly releases hormones — the chemicals the body makes to control organ function — through the vaginal wall into the ...

471

Esophageal Rings and Webs  

MedlinePLUS

... determine if you have a ring or a web, your doctor may order one of these tests: Barium swallow test. This allows the radiologist to ... contribute to the development of esophageal rings and webs, your doctor probably will order a blood test for iron levels and, if you are deficient, ...

472

Child sex rings  

Microsoft Academic Search

Details of 11 child sex rings identified in one working class community were obtained by interviewing investigating police officers and examining health and social services records. The rings contained 14 adult male perpetrators and 175 children aged 6-15 years. Most perpetrators used child ringleaders to recruit victims; others became a \\

N J Wild; J M Wynne

1986-01-01

473

The Fermilab recycler ring  

SciTech Connect

The Fermilab Recycler is a permanent magnet storage ring for the accumulation of antiprotons from the Antiproton Source, and the recovery and cooling of the antiprotons remaining at the end of a Tevatron store. It is an integral part of the Fermilab III luminosity upgrade. The following paper describes the design features, operational and commissioning status of the Recycler Ring.

Martin Hu

2001-07-24

474

Testing the Caustic Ring Dark Matter Theory Against Observations in the Milky Way  

NASA Astrophysics Data System (ADS)

We test a particular theory of dark matter, in which dark matter axions form ring "caustics" in the plane of the Milky Way. According to this theory, cold collisionless dark matter particles with angular momentum flow in and out of the Milky Way as it forms. These flows form caustic rings (at the positions of the rings, the density of the flow is infinite) at the locations of closest approach to the Galactic center. We show that the caustic ring dark matter theory reproduces a roughly logarithmic halo, with large perturbations near the rings. We show that the theory can reasonably match the known Galaxy rotation curve. We explore the effects of the caustic rings on dwarf galaxy tidal disruption using N-body simulations. Tidally disrupted galaxies are stripped apart by the gravitational forces of the Milky Way, leaving both leading and trailing streams of stars. We compare the results of the model with observations of tidal streams.

Dumas, Julie; Newberg, H. J.; Susser, A.

2014-01-01

475

Ices in planetary rings  

NASA Astrophysics Data System (ADS)

Understanding the structure and behavior of Saturnian rings in terms of properties of ices is basic for evolutionary planetology. The available information indicates the presence of quite pure, probably amorphous water ice in the form of medium-grained frost in a fairy castle structure with a low thermal inertia. Tidal forces and interparticle collisions lead to continuous break-up and re-formation of loose aggregates of smaller particles. Micrometeoroid bombardment and proton irradiation are important for explaining the mechanical and optical properties of the surfaces of ring particles. The transfer of angular momentum and mass among the rings should homogenize the chemical and structural characteristics of the ring ices. Uranian rings may be made of carbon-covered methane ice particles.

Smoluchowski, R.

476

Planetary rings. [review  

NASA Technical Reports Server (NTRS)

This review discusses each planetary ring system and describes recent theoretical developments and models of ring evolution. The distribution of the inner rings and satellites of all four giant planets reduced to a uniform scale of 'planetary units', normalized by the equatorial radius of each planet, is summarized. Only major ring subunits are indicated, with the density of cross-hatching representing in a crude way the relative optical depths of the different components of each system. One result of the spacecraft observations has been the discovery at each planet of several small (10-100 km in radius) satellites that appear to be intimately related to the rings, dynamically and possibly genetically as well.

Nicholson, Philip D.; Dones, Luke

1991-01-01

477

Ring chromosome 4.  

PubMed Central

A mentally and physically retarded boy with a 46,XY,ring (4) (p16q35) chromosome complement is described. Chromosome banding showed that the amount of chromosome material deleted from the ring chromosome 4 was minimal, apparently no more than the telomeres. Chromosomal aberrations appear to be restricted to the production of double-sized dicentric rings, and aneuploidy. The mosiacism resulting from the behavioural peculiarities of ring chromosomes is described as dynamic mosaicism. It is suggested that the clinical features associated with this ring chromosome are more likely to be the result of the effects of a diploid/monosomy 4/polysomy 4 mosaicism than to the deficiency of the telomeric regions of the chromosome. Images PMID:881718

McDermott, A; Voyce, M A; Romain, D

1977-01-01

478

Jupiter's Rings: Sharpest View  

NASA Technical Reports Server (NTRS)

The New Horizons spacecraft took the best images of Jupiter's charcoal-black rings as it approached and then looked back at Jupiter. The top image was taken on approach, showing three well-defined lanes of gravel- to boulder-sized material composing the bulk of the rings, as well as lesser amounts of material between the rings. New Horizons snapped the lower image after it had passed Jupiter on February 28, 2007, and looked back in a direction toward the sun. The image is sharply focused, though it appears fuzzy due to the cloud of dust-sized particles enveloping the rings. The dust is brightly illuminated in the same way the dust on a dirty windshield lights up when you drive toward a 'low' sun. The narrow rings are confined in their orbits by small 'shepherding' moons.

2007-01-01

479

Factors affecting piston ring friction  

E-print Network

The piston ring pack friction is a major contributor to the internal combustion engine mechanical friction loss. The oil control ring decides the oil supply to the top two rings in addition to being the major friction ...

Liao, Kai, Ph. D. Massachusetts Institute of Technology

2013-01-01

480

Galactic planetary science  

PubMed Central

Planetary science beyond the boundaries of our Solar System is today in its infancy. Until a couple of decades ago, the detailed investigation of the planetary properties was restricted to objects orbiting inside the Kuiper Belt. Today, we cannot ignore that the number of known planets has increased by two orders of magnitude nor that these planets resemble anything but the objects present in our own Solar System. Whether this fact is the result of a selection bias induced by the kind of techniques used to discover new planets—mainly radial velocity and transit—or simply the proof that the Solar System is a rarity in the Milky Way, we do not know yet. What is clear, though, is that the Solar System has failed to be the paradigm not only in our Galaxy but even ‘just’ in the solar neighbourhood. This finding, although unsettling, forces us to reconsider our knowledge of planets under a different light and perhaps question a few of the theoretical pillars on which we base our current ‘understanding’. The next decade will be critical to advance in what we should perhaps call Galactic planetary science. In this paper, I review highlights and pitfalls of our current knowledge of this topic and elaborate on how this knowledge might arguably evolve in the next decade. More critically, I identify what should be the mandatory scientific and technical steps to be taken in this fascinating journey of remote exploration of planets in our Galaxy. PMID:24664916

Tinetti, Giovanna

2014-01-01

481

Dynamics of the Uranian Rings  

NASA Technical Reports Server (NTRS)

Some of the problems of the shepherding satellite model of Goldreich ant tremaine are discussed. The following topics are studied: (1) optical depths of the all the observed narrow rings; (2) satellite and ring separation timescales; (3) ring edge sharpness; (4) shock formation in narrow rings; (5) the existence of small satellites near the Uranian rings; and (6) the apse and node alignments of the eccentric and inclined rings.

Dermott, S. F.

1984-01-01

482

Hot piston ring tests  

NASA Technical Reports Server (NTRS)

As part of the DOE/NASA Automotive Stirling Engine Project, tests were made at NASA Lewis Research Center to determine whether appendix gap losses could be reduced and Stirling engine performance increased by installing an additional piston ring near the top of each piston dome. An MTI-designed upgraded Mod I Automotive Stirling Engine was used. Unlike the conventional rings at the bottom of the piston, these hot rings operated in a high temperature environment (700 C). They were made of a high temperature alloy (Stellite 6B) and a high temperature solid lubricant coating (NASA Lewis-developed PS-200) was applied to the cylinder walls. Engine tests were run at 5, 10, and 15 MPa operating pressure over a range of operating speeds. Tests were run both with hot rings and without to provide a baseline for comparison. Minimum data to assess the potential of both the hot rings and high temperature low friction coating was obtained. Results indicated a slight increase in power and efficiency, an increase over and above the friction loss introduced by the hot rings. Seal leakage measurements showed a significant reduction. Wear on both rings and coating was low.

Allen, David J.; Tomazic, William A.

1987-01-01

483

Seal ring installation tool  

NASA Technical Reports Server (NTRS)

A seal ring tool that allows an installer to position a primary seal ring between hub ends of pipe flanges that are being assembled together. The tool includes a pivoting handle member and extension arms attached to the pivoting handle member. The ends of the arms have side indentation type longitudinal grooves angled toward one another for holding the primary seal ring in place between the hubs of respective pipes that are to be attached together. The arms of the tool can also have flat sides that can be used to abut against an optional second larger seal that is supported within a groove in one of the hub ends so that the second hub end can then be moved against the other side of the primary seal ring. Once the seal ring is positioned between the pipe hubs, the pipe hubs can be moved about the seal ring due to the flat sides of the arms of the tool. The tool eliminates the chances of damaging and contaminating seal rings being installed within pipe hubs that are being attached to one another.

Haselmaier, L. Haynes (Inventor)

2004-01-01

484

Galactic Twins of the Nebula Around SN 1987A: Hints that LBVs may be supernova progenitors  

E-print Network

I discuss outstanding questions about the formation of the ring nebula around SN1987A and some implications of similar ring nebulae around Galactic B supergiants. There are notable obstacles for the formation of SN1987A's bipolar nebula through interacting winds in a transition from a red supergiant to a blue supergiant. Instead, several clues hint that the nebula may have been ejected in an LBV-like event. In addition to the previously known example of Sher25, there are two newly-discovered Galactic analogs of SN1987A's ringed nebula. Of these three Galactic analogs around blue supergiants, two (Sher25 and SBW1) have chemical abundances indicating that they have not been through a red supergiant phase, and the remaining ringed bipolar nebula surrounds a luminous blue variable (HD168625). Although SK-69 202's initial mass of 20 Msun is lower than those atributed to most LBVs, it is not far off, and the low-luminosity end of the LBV phenomenon is not well defined. Furthermore, HD168625's luminosity indicates an initial mass of only 25 Msun, that of SBW1 is consistent with 20 Msun, and there is a B[e] star in the SMC with an initial mass of 20 Msun that experienced an LBV outburst in the 1990s. These similarities may be giving us important clues about Sk-69 202's pre-SN evolution and the formation mechanism of its nebula.

Nathan Smith

2007-05-21

485

Classical geometries defined by exterior differential systems on higher frame bundles  

NASA Technical Reports Server (NTRS)

Exterior differential ideals are discussed, and sets of invariant generators presented, for Reimannian, conformal and projective geometries, and for specializations such as Ricci-flat, self-dual and Einstein-Maxwell theories. The Cartan characteristic integers are explicitly calculated, and involutory basis forms found, for each of these (specialized to four dimensions), exposing their algebraic structure and showing how they generate well-posed sets of partial differential equations.

Estabrook, Frank B.; Wahlquist, Hugo D.

1989-01-01

486

Exterior view of LongTerm Oxidizer Silo (T28D) in left background ...  

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

Exterior view of Long-Term Oxidizer Silo (T-28D) in left background (taller structure) and adjacent Oxidizer Conditioning Structure (T-28B) at extreme left background, looking south. At far right in foreground is a nitrogen tank in a concrete truck well - Air Force Plant PJKS, Systems Integration Laboratory, Long-Term Oxidizer Silo, Waterton Canyon Road & Colorado Highway 121, Lakewood, Jefferson County, CO

487

On the non-equivalence of perfectly matched layers and exterior complex scaling  

NASA Astrophysics Data System (ADS)

The perfectly matched layers (PML) and exterior complex scaling (ECS) methods for absorbing boundary conditions are analyzed using spectral decomposition. Both methods are derived through analytical continuations from unitary to contractive transformations. We find that the methods are mathematically and numerically distinct: ECS is complex stretching that rotates the operator's spectrum into the complex plane, whereas PML is a complex gauge transform which shifts the spectrum. Consequently, the schemes differ in their time-stability. Numerical examples are given.

Scrinzi, A.; Stimming, H. P.; Mauser, N. J.

2014-07-01

488

Exterior view of north wall of LongTerm Oxidizer Silo (T28B) ...  

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

Exterior view of north wall of Long-Term Oxidizer Silo (T-28B) and Oxidizer Conditioning Structure (T-28D) behind and to its immediate left, looking south. A nitrogen line, used to prepare the Titan II's nitrogen-tetroxide oxidizer, is in the right foreground - Air Force Plant PJKS, Systems Integration Laboratory, Long-Term Oxidizer Silo, Waterton Canyon Road & Colorado Highway 121, Lakewood, Jefferson County, CO

489

Error estimates of the DtN finite element method for the exterior Helmholtz problem  

Microsoft Academic Search

A priori error estimates are established for the DtN (Dirichlet-to-Neumann) finite element method applied to the exterior Helmholtz problem. The error estimates include the effect of truncation of the DtN boundary condition as well as that of the finite element discretization. A property of the Hankel functions which plays an important role in the proof of the error estimates is

Daisuke Koyama

2007-01-01

490

5. Exterior view of LongTerm Hydrazine Silo (T28E), looking west. ...  

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

5. Exterior view of Long-Term Hydrazine Silo (T-28E), looking west. The low-lying building to the left of the silo is the Fuel Purification Structure (T-28E). A hydrazine tank is in the concrete truck well in the immediate foreground. - Air Force Plant PJKS, Systems Integration Laboratory, Long-Term Hydrazine Silo, Waterton Canyon Road & Colorado Highway 121, Lakewood, Jefferson County, CO

491

3. EXTERIOR/STREET LEVEL VIEW, LOOKING WEST ALONG FIRST AVENUE NORTH ...  

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

3. EXTERIOR/STREET LEVEL VIEW, LOOKING WEST ALONG FIRST AVENUE NORTH WITH (LEFT TO RIGHT) CALDWELL-MILNER, MCADORY, JOHN HAND, WOODWARD BUILDINGS AND BROWN MARX BUILDING (RIGHT). ALSO PICTURED IS THE BANK FOR SAVINGS BUILDING (TOP RIGHT) AND THE RAILROAD RESERVATION (TOP LEFT TO RIGHT). VIEW TAKEN AS CITY THAWS FROM A MARCH BLIZZARD. - Heaviest Corner on Earth (Commercial), First Avenue, North & Twentieth (20th) Street, North, Birmingham, Jefferson County, AL

492

Stability results for fluids of Oldroyd-B type on exterior domains  

NASA Astrophysics Data System (ADS)

Consider the set of equations describing fluids of Oldroyd-B type on an exterior domain. It is shown that the solution of the linearized equation is governed by a bounded analytic semigroup on Lp(?) × W1, p(?), 1

Geissert, Matthias; Hieber, Matthias; Huy, Nguyen Thieu

2014-09-01

493

Exterior Differential Systems, Prolongations and the Integrability of Two Nonlinear Partial Differential Equations  

E-print Network

A generalized KdV equation is formulated as an exterior differential system, which is used to determine the prolongation structure of the equation. The prolongation structure is obtained for several cases of the variable powers, and nontrivial algebras are determined. The analysis is extended to a differential system which gives the Camassa-Holm equation as a particular case. The subject of conservation laws is briefly discussed for each of the equations. A Backlund transformation is determined using one of the prolongations.

Paul Bracken

2009-03-24

494

1. Exterior view of Signal Transfer Building (T28A), looking southwest. ...  

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

1. Exterior view of Signal Transfer Building (T-28A), looking southwest. This structure houses controls for propellant transfer, instrumentation for testing, test data transmission receivers, data verification equipment, and centralized utilities for the Systems Integration Laboratory complex. The gantries of the Systems Integration Laboratory Building (T-28) are visible to the rear of this structure. - Air Force Plant PJKS, Systems Integration Laboratory, Signal Transfer Building, Waterton Canyon Road & Colorado Highway 121, Lakewood, Jefferson County, CO

495

Rings and Radial Waves in the Disk of the Milky Way  

NASA Astrophysics Data System (ADS)

We show that in the anticenter region, between Galactic longitudes of 110?< l < 229?, there is an asymmetry in the main sequence star counts on either side of the Galactic plane using data from the Sloan Digital Sky Survey. This asymmetry oscillates from more stars in the north at distances of about 2 kpc from the Sun to more stars in the south at 4-6 kpc from the Sun to more stars in the north at distances of 8-10 kpc from the Sun. We also see evidence that there are more stars in the south at distances of 12-16 kpc from the Sun. The three more distant asymmetries form roughly concentric rings around the Galactic center, opening in the direction of the Milky Way's spiral arms. The northern ring, 9 kpc from the Sun, is easily identified with the previously discovered Monoceros Ring. Parts of the southern ring at 14 kpc from the Sun (which we call the TriAnd Ring) have previously been identified as related to the Monoceros Ring and others have been called the Triangulum Andromeda Overdensity. The two nearer oscillations are approximated by a toy model in which the disk plane is offset by of the order 100 pc up and then down at different radii. We also show that the disk is not azimuthally symmetric around the Galactic anticenter and that there could be a correspondence between our observed oscillations and the spiral structure of the Galaxy. We suggest that the TriAnd and Monoceros Rings could be accreted satellites that form an outer disk. More complex modeling is necessary to understand the observations. This research is supported by the NSF grant AST 09-37523, and NSF China grant Nos. 11203030 and the National Key Basic Research Program of China 2014CB845703.

Newberg, Heidi Jo; Xu, Yan; Carlin, Jeffrey L.; Liu, Chao; Deng, Licai; Li, Jing; Schoenrich, Ralph; Yanny, Brian

2015-01-01

496

Measurement of Exterior Foundation Insulation to Assess Durability in Energy-Saving Performance  

SciTech Connect

The foundation of a house is a sometimes ignored component of the building because of its low visibility. It is increasingly evident, however, that attention to good foundation design and construction significantly benefits the homeowner and the builder by mitigating future problems. Good foundation design and construction practice involves not only insulating to save energy but also providing effective structural design as well as moisture, termite, and radon control techniques as appropriate. Energy efficiency in housing is augmented by use of exterior slab and basement insulation, but high moisture content in the insulation material has led to concerns about its durability. The activity under this task was to extract six different exterior insulation systems that were characterized at installation and have been in the ground for 9 months to 15 years. R-value and moisture content were measured and inspections conducted for evidence of termite intrusion or deterioration. Based on the results, the durability of the various systems has been documented and assessments made of which systems appear to be best practice. Heat flux and temperature measurement data had been archived for some of the exterior insulation tests, thereby providing a unique opportunity to assess energy-saving performance and durability over the long term. The results show that the durability of foundation insulation systems depends on insulation type as well as on foundation type and local boundary conditions, the latter of which may have a marked influence on the durability of energy-saving performance.

Kehrer, Manfred [ORNL; Christian, Jeff [Oak Ridge National Laboratory (ORNL)

2012-04-01

497

Morphologies introduced by bistability in barred-spiral galactic potentials  

NASA Astrophysics Data System (ADS)

We investigate the orbital dynamics of a barred-spiral model when the system is rotating slowly and corotation is located beyond the end of the spiral arms. In the characteristic of the central family of periodic orbits, we find a `bistable region'. In the response model, we observe a ring surrounding the bar and spiral arms starting tangential to the ring. This is a morphology resembling barred-spiral systems with inner rings. However, the dynamics associated with this structure in the case we study is different from that of a typical bar ending close to corotation. The ring of our model is round, or rather elongated perpendicular to the bar. It is associated with a folding (an `S'-shaped feature) of the characteristic of the central family, which is typical in bistable bifurcations. Along the `S' part of the characteristic, we have a change in the orientation of the periodic orbits from an x1-type to an x2-type morphology. The orbits populated in the response model change rather abruptly their orientation when reaching the lowest energy of the `S'. The spirals of the model follow a standard `precessing ellipses flow' and the orbits building them have energies beyond the `S' region. The bar is structured mainly by sticky orbits from regions around the stability islands of the central family. This leads to the appearance of X features in the bars on the galactic plane. Such a bar morphology appears in the unsharp-masked images of some moderately inclined galaxies.

Tsigaridi, L.; Patsis, P. A.

2015-04-01

498

Galactic Halos of Hydrogen  

NASA Technical Reports Server (NTRS)

This image shows two companion galaxies, NGC 4625 (top) and NGC 4618 (bottom), and their surrounding cocoons of cool hydrogen gas (purple). The huge set of spiral arms on NGC 4625 (blue) was discovered by the ultraviolet eyes of NASA's Galaxy Evolution Explorer. Though these arms are nearly invisible when viewed in optical light, they glow brightly in ultraviolet. This is because they are bustling with hot, newborn stars that radiate primarily ultraviolet light.

The vibrant spiral arms are also quite lengthy, stretching out to a distance four times the size of the galaxy's core. They are part of the largest ultraviolet galactic disk discovered so far.

Astronomers do not know why NGC 4625 grew arms while NGC 4618 did not. The purple nebulosity shown here illustrates that hydrogen gas - an ingredient of star formation - is diffusely distributed around both galaxies. This means that other unknown factors led to the development of the arms of NGC 4625.

Located 31 million light-years away in the constellation Canes Venatici, NGC 4625 is the closest galaxy ever seen with such a young halo of arms. It is slightly smaller than our Milky Way, both in size and mass. However, the fact that this galaxy's disk is forming stars very actively suggests that it might evolve into a more massive and mature galaxy resembling our own.

The image is composed of ultraviolet, visible-light and radio data, from the Galaxy Evolution Explorer, the California Institute of Technology's Digitized Sky Survey, and the Westerbork Synthesis Radio Telescope, the Netherlands, respectively. Near-ultraviolet light is colored green; far-ultraviolet light is colored blue; and optical light is colored red. Radio emissions are colored purple.

2005-01-01

499

A Disturbed Galactic Duo  

NASA Astrophysics Data System (ADS)

The galaxies in this cosmic pairing, captured by the Wide Field Imager on the MPG/ESO 2.2-metre telescope at the La Silla Observatory in Chile, display some curious features, demonstrating that each member of the duo is close enough to feel the distorting gravitational influence of the other. The gravitational tug of war has warped the spiral shape of one galaxy, NGC 3169, and fragmented the dust lanes in its companion NGC 3166. Meanwhile, a third, smaller galaxy to the lower right, NGC 3165, has a front-row seat to the gravitational twisting and pulling of its bigger neighbours. This galactic grouping, found about 70 million light-years away in the constellation Sextans (The Sextant), was discovered by the English astronomer William Herschel in 1783. Modern astronomers have gauged the distance between NGC 3169 (left) and NGC 3166 (right) as a mere 50 000 light-years, a separation that is only about half the diameter of the Milky Way galaxy. In such tight quarters, gravity can start to play havoc with galactic structure. Spiral galaxies like NGC 3169 and NGC 3166 tend to have orderly swirls of stars and dust pinwheeling about their glowing centres. Close encounters with other massive objects can jumble this classic configuration, often serving as a disfiguring prelude to the merging of galaxies into one larger galaxy. So far, the interactions of NGC 3169 and NGC 3166 have just lent a bit of character. NGC 3169's arms, shining bright with big, young, blue stars, have been teased apart, and lots of luminous gas has been drawn out from its disc. In NGC 3166's case, the dust lanes that also usually outline spiral arms are in disarray. Unlike its bluer counterpart, NGC 3166 is not forming many new stars. NGC 3169 has another distinction: the faint yellow dot beaming through a veil of dark dust just to the left of and close to the galaxy's centre [1]. This flash is the leftover of a supernova detected in 2003 and known accordingly as SN 2003cg. A supernova of this variety, classified as a Type Ia, is thought to occur when a dense, hot star called a white dwarf - a remnant of medium-sized stars like our Sun - gravitationally sucks gas away from a nearby companion star. This added fuel eventually causes the whole star to explode in a runaway fusion reaction. The new image presented here of a remarkable galactic dynamic duo is based on data selected by Igor Chekalin for ESO's Hidden Treasures 2010 astrophotography competition. Chekalin won the first overall prize and this image received the second highest ranking of the nearly 100 contest entries [2]. Notes [1] Other much more noticeable points of light, such as the one toward the left end of the spiral arm running underneath of NGC 3169's core, are stars within the Milky Way that happen to fall by chance very close to the line of sight between our telescopes and the galaxies. [2] ESO's Hidden Treasures 2010 competition gave amateur astronomers the opportunity to search through ESO's vast archives of astronomical data, hoping to find a well-hidden gem that needed polishing by the entrants. To find out more about Hidden Treasures, visit http://www.eso.org/public/outreach/hiddentreasures/. More information ESO, the European Southern Observatory, is the foremost intergovernmental astronomy organisation in Europe and the world's most productive astronomical observatory. It is supported by 15 countries: Austria, Belgium, Brazil, the Czech Republic, Denmark, France, Finland, Germany, Italy, the Netherlands, Portugal, Spain, Sweden, Switzerland and the United Kingdom. ESO carries out an ambitious programme focused on the design, construction and operation of powerful ground-based observing facilities enabling astronomers to make important scientific discoveries. ESO also plays a leading role in promoting and organising cooperation in astronomical research. ESO operates three unique world-class observing sites in Chile: La Silla, Paranal and Chajnantor. At Paranal, ESO operates the Very Large Telescope, the world's most advanced visible-light astronomical observatory and VISTA, the world

2011-04-01

500

Symmetries of vector exterior differential systems and the inverse problem in second-order Ostrohrads'kyj mechanics  

E-print Network

Symmetries of variational problems are considered as symmetries of vector bundle valued exterior differential systems. This approach is then applied to third order ordinary variational equations of motion of the semi-classical spinning particle.

R. Ya. Matsyuk

2014-06-23