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1

A two-component outer ring and Galactic spiral structure  

NASA Astrophysics Data System (ADS)

A model of the Galaxy with a ring R1R'2 can explain some large-scale morphological features of Galactic spiral structure. The Carina-Sagittarius arm could consist of two ascending segments of outer rings R1 and R2, which almost touch each other near the Carina region. The Perseus and Crux arms can be partially identified with the descending segments of ring R2. A model of a two-component outer ring can also explain the existence of some maxima in diagrams of (l, VLSR), which are supposed to correspond to directions tangential to the spiral arms. On the basis of numerical simulations, we propose two sketches of the ring structure of the Galaxy that include a bar, two outer rings, an inner ring and nuclear gas condensation, which may be a nuclear ring. Both sketches can explain the position of the Carina-Sagittarius arm with respect to the Sun.

Mel'Nik, A. M.; Rautiainen, P.

2011-12-01

2

Physical Properties and Galactic Distribution of Molecular Clouds Identified in the Galactic Ring Survey  

NASA Astrophysics Data System (ADS)

We derive the physical properties of 580 molecular clouds based on their 12CO and 13CO line emission detected in the University of Massachusetts-Stony Brook (UMSB) and Galactic Ring surveys. We provide a range of values of the physical properties of molecular clouds, and find a power-law correlation between their radii and masses, suggesting that the fractal dimension of the interstellar medium is around 2.36. This relation, M = (228 ± 18) R 2.36 ± 0.04, allows us to derive masses for an additional 170 Galactic Ring Survey (GRS) molecular clouds not covered by the UMSB survey. We derive the Galactic surface mass density of molecular gas and examine its spatial variations throughout the Galaxy. We find that the azimuthally averaged Galactic surface density of molecular gas peaks between Galactocentric radii of 4 and 5 kpc. Although the Perseus arm is not detected in molecular gas, the Galactic surface density of molecular gas is enhanced along the positions of the Scutum-Crux and Sagittarius arms. This may indicate that molecular clouds form in spiral arms and are disrupted in the inter-arm space. Finally, we find that the CO excitation temperature of molecular clouds decreases away from the Galactic center, suggesting a possible decline in the star formation rate with Galactocentric radius. There is a marginally significant enhancement in the CO excitation temperature of molecular clouds at a Galactocentric radius of about 6 kpc, which in the longitude range of the GRS corresponds to the Sagittarius arm. This temperature increase could be associated with massive star formation in the Sagittarius spiral arm.

Roman-Duval, Julia; Jackson, James M.; Heyer, Mark; Rathborne, Jill; Simon, Robert

2010-11-01

3

Infalling gas onto the Galactic center circumnuclear ring  

NASA Astrophysics Data System (ADS)

The central region of our Galaxy (Sgr A*) is the nearest galactic center harboring a massive black hole. The environment around Sgr A* is a topic of interest to diverse fields. We are interested in gas feeding from giant molecular clouds (GMC) within 10 pc of the Galactic center to the Circumnuclear Ring/Disk (CND), which is presumable 'lay-down bay' of infalling gas toward Sgr A*. In order to reveal the mechanism, we observed the CND and its surroundings in SiO and H13 CO+ lines using Nobeyama Millimeter Array (NMA). We depict the CND clearly in both lines and some molecular streamers to the CND in only SiO line including one new detection. The line intensity ratios at overlapping points of streamers with the CND are higher (I(SiO)/I(H13CO+) > 6) than the average of CND (2 4). This is a strong evidence indicating these streamers are connecting to the CND. Some components at the outer region of the CND are also detected in both lines. We also estimate the rotation velocity of the CND as 110±10 km s-1 and of just a bit outside from the CND as 93±14 km s-1. The estimation of the rotation velocity in the distance range of 5-10 pc from the Sgr A* has a great meaning since there have been few report about the kinematic parameters at just outside of the CND.

Sato, M. T.; Tsuboi, M.

2008-10-01

4

The Lesser Role of Shear in Galactic Star Formation: Insight from the Galactic Ring Survey  

NASA Astrophysics Data System (ADS)

We analyze the role played by shear in regulating star formation in the Galaxy on the scale of individual molecular clouds. The clouds are selected from the 13CO J = 1-0 line of the Galactic Ring Survey. For each cloud, we estimate the shear parameter which describes the ability of density perturbations to grow within the cloud. We find that for almost all molecular clouds considered, there is no evidence that shear is playing a significant role in opposing the effects of self-gravity. We also find that the shear parameter of the clouds does not depend on their position in the Galaxy. Furthermore, we find no correlations between the shear parameter of the clouds with several indicators of their star formation activity. No significant correlation is found between the shear parameter and the star formation efficiency of the clouds which is measured using the ratio of the massive young stellar objects luminosities, measured in the Red MSX survey, to the cloud mass. There are also no significant correlations between the shear parameter and the fraction of their mass that is found in denser clumps which is a proxy for their clump formation efficiency, nor with their level of fragmentation expressed in the number of clumps per unit mass. Our results strongly suggest that shear is playing only a minor role in affecting the rates and efficiencies at which molecular clouds convert their gas into dense cores and thereafter into stars.

Dib, Sami; Helou, George; Moore, Toby J. T.; Urquhart, James S.; Dariush, Ali

2012-10-01

5

THE LESSER ROLE OF SHEAR IN GALACTIC STAR FORMATION: INSIGHT FROM THE GALACTIC RING SURVEY  

SciTech Connect

We analyze the role played by shear in regulating star formation in the Galaxy on the scale of individual molecular clouds. The clouds are selected from the {sup 13}CO J = 1-0 line of the Galactic Ring Survey. For each cloud, we estimate the shear parameter which describes the ability of density perturbations to grow within the cloud. We find that for almost all molecular clouds considered, there is no evidence that shear is playing a significant role in opposing the effects of self-gravity. We also find that the shear parameter of the clouds does not depend on their position in the Galaxy. Furthermore, we find no correlations between the shear parameter of the clouds with several indicators of their star formation activity. No significant correlation is found between the shear parameter and the star formation efficiency of the clouds which is measured using the ratio of the massive young stellar objects luminosities, measured in the Red MSX survey, to the cloud mass. There are also no significant correlations between the shear parameter and the fraction of their mass that is found in denser clumps which is a proxy for their clump formation efficiency, nor with their level of fragmentation expressed in the number of clumps per unit mass. Our results strongly suggest that shear is playing only a minor role in affecting the rates and efficiencies at which molecular clouds convert their gas into dense cores and thereafter into stars.

Dib, Sami; Dariush, Ali [Astrophysics Group, Blackett Laboratory, Imperial College London, London SW7 2AZ (United Kingdom); Helou, George [Infrared Processing and Analysis Center, California Institute of Technology, Pasadena, CA 91125 (United States); Moore, Toby J. T. [Astrophysics Research Institute, Liverpool John Moores University, Twelve Quays House, Egerton Wharf, Birkenhead CH41 1LD (United Kingdom); Urquhart, James S., E-mail: s.dib@imperial.ac.uk [Max-Planck Institut fuer Radioastronomie, Auf dem Huegel 69, 53121 Bonn (Germany)

2012-10-20

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

KINEMATIC DISTANCES TO MOLECULAR CLOUDS IDENTIFIED IN THE GALACTIC RING SURVEY  

SciTech Connect

Kinematic distances to 750 molecular clouds identified in the {sup 13}CO J = 1 {yields} 0 Boston University-Five College Radio Astronomy Observatory Galactic Ring Survey (GRS) are derived assuming the Clemens rotation curve of the Galaxy. The kinematic distance ambiguity is resolved by examining the presence of H I self-absorption toward the {sup 13}CO emission peak of each cloud using the Very Large Array Galactic Plane Survey. We also identify 21 cm continuum sources embedded in the GRS clouds in order to use absorption features in the H I 21 cm continuum to distinguish between near and far kinematic distances. The Galactic distribution of GRS clouds is consistent with a four-arm model of the Milky Way. The locations of the Scutum-Crux and Perseus arms traced by GRS clouds match star-count data from the Galactic Legacy Infrared Mid-Plane Survey Extraordinaire star-count data. We conclude that molecular clouds must form in spiral arms and be short-lived (lifetimes < 10{sup 7} yr) in order to explain the absence of massive, {sup 13}CO bright molecular clouds in the interarm space.

Roman-Duval, Julia; Jackson, James M.; Johnson, Alexis [Institute for Astrophysical Research at Boston University, Boston, MA 02215 (United States); Heyer, Mark [Department of Astronomy, University of Massachusetts, Amherst, MA 01003-9305 (United States); Rathborne, Jill [Harvard Smithsonian Center for Astrophysics, Cambridge, MA 02138 (United States); Shah, Ronak [MIT Lincoln Laboratory, 244 Wood Street, Lexington, MA 02134 (United States); Simon, Robert [Physikalisches Institut, Universitat zu Koln, 50937 Cologne (Germany)], E-mail: jduval@bu.edu, E-mail: jackson@bu.edu

2009-07-10

8

A Galactic ring of minimum stellar density near the solar orbit radius  

NASA Astrophysics Data System (ADS)

We analyse the secular effects of a long-lived Galactic spiral structure on the stellar orbits with mean radii close to the corotation resonance. By test-particle simulations and different spiral potential models with parameters constrained on observations, we verified the formation of a minimum with amplitude ˜30-40 per cent of the background disc stellar density at corotation. Such a minimum is formed by the secular angular momentum transfer between stars and the spiral density wave on both sides of corotation. We demonstrate that the secular loss (gain) of angular momentum and decrease (increase) of mean orbital radius of stars just inside (outside) corotation can counterbalance the opposite trend of exchange of angular momentum shown by stars orbiting the librational points L4/5 at the corotation circle. Such secular processes actually allow steady spiral waves to promote radial migration across corotation. We propose some pieces of observational evidence for the minimum stellar density in the Galactic disc, such as its direct relation to the minimum in the observed rotation curve of the Galaxy at the radius r ˜ 9 kpc (for R0 = 7.5 kpc), as well as its association with a minimum in the distribution of Galactic radii of a sample of open clusters older than 1 Gyr. The closeness of the solar orbit radius to the corotation resonance implies that the solar orbit lies inside a ring of minimum surface density (stellar + gas). This also implies a correction to larger values for the estimated total mass of the Galactic disc, and consequently, a greater contribution of the disc component to the inner rotation curve of the Galaxy.

Barros, D. A.; Lépine, J. R. D.; Junqueira, T. C.

2013-11-01

9

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

10

Characterizing the Galactic warp with Gaia - I. The tilted ring model with a twist  

NASA Astrophysics Data System (ADS)

We explore the possibility of detecting and characterizing the warp of the stellar disc of our Galaxy using synthetic Gaia data. The availability of proper motions and, for the brightest stars radial velocities, adds a new dimension to this study. A family of Great Circle Cell Counts methods is used. They are ideally suited to find the tilt and twist of a collection of rings, which allow us to detect and measure the warp parameters. To test them, we use random realizations of test particles which evolve in a realistic Galactic potential warped adiabatically to various final configurations. In some cases a twist is introduced additionally. The Gaia selection function, its errors model and a realistic 3D extinction map are applied to mimic three tracer populations: OB, A and red clump stars. We show how the use of kinematics improves the accuracy in the recovery of the warp parameters. The OB stars are demonstrated to be the best tracers determining the tilt angle with accuracy better than ˜0.5 up to Galactocentric distance of ˜16 kpc. Using data with good astrometric quality, the same accuracy is obtained for A-type stars up to ˜13 kpc and for red clump up to the expected stellar cut-off. Using OB stars the twist angle is recovered to within <3° for all distances.

Abedi, Hoda; Mateu, Cecilia; Aguilar, Luis A.; Figueras, Francesca; Romero-Gómez, Mercè

2014-08-01

11

NOTES ON SYMMETRIC AND EXTERIOR DEPTH AND ANNIHILATOR NUMBERS  

Microsoft Academic Search

We survey and compare invariants of modules over the polynomial ring and the exterior algebra. In our considerations, we focus on the depth. The exterior analogue of depth was first introduced by Aramova, Avramov and Herzog. We state similarities between the two notion of depth and exhibit their relation in the case of squarefree modules. Work of Conca, Herzog and

MARTINA KUBITZKE

2009-01-01

12

8. VAL CONTROL STATION, DETAIL OF EXTERIOR SHOWING EXTERIOR DOOR, ...  

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

8. VAL CONTROL STATION, DETAIL OF EXTERIOR SHOWING EXTERIOR DOOR, WINDOW AND EXPOSED CONCRETE SURFACE LOOKING NORTH. - Variable Angle Launcher Complex, Control Station, CA State Highway 39 at Morris Reservior, Azusa, Los Angeles County, CA

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

Rings  

SciTech Connect

The essence of vortex physics is that at certain low-energy scales elementary excitations of a point particle theory can behave like strings rather than particles. Vortices are the resulting string-like solutions; their thickness sets the distance scale beyond which physics is string-like rather than particle-like. String degrees of freedom are massless in the sense that excitations on a string can have an arbitrarily low frequency. Non-string degrees of freedom correspond to massive particles and are absent from the low energy spectrum. This article considers only field theories with vortices at low energies. The possible existence of a class of solitons in these vortex theories will be discussed. They are vortex rings: they are localized and finite in energy, and able to carry the quantum numbers of point particles. Rings are thus particle-like solutions of a vortex theory, which is itself a limit of a point particle field theory.

Davis, R.L.

1989-01-01

15

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

16

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

17

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

Federal Register 2010, 2011, 2012, 2013

...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

18

An exterior for the G\\\\\\  

Microsoft Academic Search

We match the vacuum, stationary, cylindrically symmetric solution of\\u000aEinstein's field equations with $\\\\Lambda$, in a form recently given by Santos,\\u000aas an exterior to an infinite cylinder of dust cut out of a G\\\\\\

W. B. Bonnor; N. O. Santos; M. A. H. MacCallum

1997-01-01

19

Uranus - Beneath that bland exterior  

NASA Technical Reports Server (NTRS)

Findings made by the Voyager missions regarding the atmosphere, magnetic field, rings, and satellites of Uranus are reviewed. The reasons for the bland appearance of the planet are addressed, and the use of radio and infrared instruments to determine the rotational speeds of the planet and atmosphere, the equatorial radius, and the atmospheric temperature is discussed. The corkscrew magnetic field and the dark, almost dust-free rings are described. The most significant features of the largest Uranian moons are mentioned.

Simpson, Richard A.; Miner, Ellis D.

1989-01-01

20

36 CFR 910.38 - Building exterior illumination.  

Code of Federal Regulations, 2013 CFR

...2012-07-01 true Building exterior illumination...FOR URBAN PLANNING AND DESIGN OF DEVELOPMENT WITHIN...Development Area § 910.38 Building exterior illumination. Exterior illumination of a building shall be in...

2013-07-01

21

Efficient Linear Solution of Exterior Orientation  

Microsoft Academic Search

This paper concerns an efficient algorithm for the solution of the exterior orientation problem. Orthogonal decompositions are used to first isolate the unknown depths of feature points in the camera reference frame, allowing the problem to be reduced to an absolute orientation with scale problem, which is solved using the singular value decomposition (SVD). The key feature of this approach

Paul D. Fiore

2001-01-01

22

Galactic Fountains and Galactic Winds  

NASA Astrophysics Data System (ADS)

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.

Breitschwerdt, D.; Komossa, S.

23

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

24

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

25

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

26

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

27

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

28

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

29

Collar nut and thrust ring  

SciTech Connect

A collar nut comprises a hollow cylinder having fine interior threads at one end for threadably engaging a pump mechanical seal assembly and an inwardly depending flange at the other end. The flange has an enlarged portion with a groove for receiving an O-ring for sealing against the intrusion of pumpage from the exterior. The enlarged portion engages a thrust ring about the pump shaft for crushing a hard O-ring, such as a graphite O-ring. The hard O-ring seals the interior of the mechanical seal assembly and pump housing against the loss of lubricants or leakage of pumpage. The fine threads of the hollow cylinder provide the mechanical advantage for crushing the hard O-ring evenly and easily with a hand tool from the side of the collar nut rather than by tightening a plurality of bolts from the end and streamlines the exterior surface of the mechanical seal. The collar nut avoids the spatial requirements of bolt heads at the end of a seal and associated bolt head turbulence.

Lowery, G.B.

1991-08-13

30

VC-dimension of exterior visibility.  

PubMed

In this paper, we study the Vapnik-Chervonenkis (VC)-dimension of set systems arising in 2D polygonal and 3D polyhedral configurations where a subset consists of all points visible from one camera. In the past, it has been shown that the VC-dimension of planar visibility systems is bounded by 23 if the cameras are allowed to be anywhere inside a polygon without holes. Here, we consider the case of exterior visibility, where the cameras lie on a constrained area outside the polygon and have to observe the entire boundary. We present results for the cases of cameras lying on a circle containing a polygon (VC-dimension= 2) or lying outside the convex hull of a polygon (VC-dimension= 5). The main result of this paper concerns the 3D case: We prove that the VC-dimension is unbounded if the cameras lie on a sphere containing the polyhedron, hence the term exterior visibility. PMID:15460289

Isler, Volkan; Kannan, Sampath; Daniilidis, Kostas; Valtr, Pavel

2004-05-01

31

EXTERIOR VIEW, LOOKING WEST, WITH CENTER SPAN EXTENDING ACROSS WARRIOR ...  

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

EXTERIOR VIEW, LOOKING WEST, WITH CENTER SPAN EXTENDING ACROSS WARRIOR RIVER. - Gulf, Mobile & Ohio Railroad Bridge, Spans Black Warrior River between Northport & Tuscaloosa, Tuscaloosa, Tuscaloosa County, AL

32

EXTERIOR VIEW, LOOKING TOWARDS TUSCALOOSA, WITH APPROACH, CONCRETE PIERS AND ...  

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

EXTERIOR VIEW, LOOKING TOWARDS TUSCALOOSA, WITH APPROACH, CONCRETE PIERS AND CENTER SPAN. - Gulf, Mobile & Ohio Railroad Bridge, Spans Black Warrior River between Northport & Tuscaloosa, Tuscaloosa, Tuscaloosa County, AL

33

EXTERIOR VIEW, LOOKING TOWARDS TUSCALOOSA, WITH CONCRETE PIERS AND CENTER ...  

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

EXTERIOR VIEW, LOOKING TOWARDS TUSCALOOSA, WITH CONCRETE PIERS AND CENTER SPAN. - Gulf, Mobile & Ohio Railroad Bridge, Spans Black Warrior River between Northport & Tuscaloosa, Tuscaloosa, Tuscaloosa County, AL

34

Marguerite Arnet Residence, exterior window detail, looking north. Adam ...  

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

Marguerite Arnet Residence, exterior window detail, looking north. - Adam & Bessie Arnet Homestead, Marguerite Arnet Residence, 560 feet northeast of Adam & Bessie Arnet Residence, Model, Las Animas County, CO

35

Marguerite Arnet Residence, exterior door detail, looking north. Adam ...  

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

Marguerite Arnet Residence, exterior door detail, looking north. - Adam & Bessie Arnet Homestead, Marguerite Arnet Residence, 560 feet northeast of Adam & Bessie Arnet Residence, Model, Las Animas County, CO

36

11. Exterior detail view of northeast corner, showing stucco finish ...  

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

11. Exterior detail view of northeast corner, showing stucco finish and woodwork details - American Railway Express Company Freight Building, 1060 Northeast Division Street, Bend, Deschutes County, OR

37

1. Historic American Buildings Survey EXTERIOR, LOOKING NORTHWEST Lanny Miyamoto, ...  

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

1. Historic American Buildings Survey EXTERIOR, LOOKING NORTHWEST Lanny Miyamoto, photographer - October 1958 - Franklin Street Presbyterian Church, Franklin & Cathedral Streets, Baltimore, Independent City, MD

38

INTERIOR, NORTH ROOM WITH CENTRAL DOOR TO EXTERIOR; VIEW TO ...  

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

INTERIOR, NORTH ROOM WITH CENTRAL DOOR TO EXTERIOR; VIEW TO NORTHEAST - Fort Bragg, Noncommissioned Officers' Service Club, Guest House Building, South of Butner Road, Fayetteville, Cumberland County, NC

39

Reconstruction algorithms for interior and exterior spherical Radon transform-based ultrasound imaging  

NASA Astrophysics Data System (ADS)

This work is concerned with the numerical implementation of a reconstruction algorithm developed to recover a function from its spherical means over spheres centered on a circle. The algorithm is experimentally verified by simulations using numerical phantoms. In the scheme of tomography, acoustic waves are generated by illuminating an object with a short burst of radio-frequency waves. In applications, like breast cancer imaging, which use modalities like photo-acoustic tomography (PAT) that model the acoustic pressures as spherical means, data are measured on the detectors located in a circle surrounding the object. This is then used to reconstruct the absorption density inside the object. In contrast, applications like bore hole tomography and improved Intravascular Ultra Sound (IVUS) imaging for prostate cancer, which use modalities like Radial Reflection Diffraction Tomography (RRDT), a ring of detectors placed exterior to the object, collect the acoustic waves as back-scattered field. This work uses a single algorithm to reconstruct functions from data collected using these two different techniques - one, by placing the object inside the ring of detectors, and the other, by placing the object exterior to the ring of detectors. The algorithm then draws a comparison between the two reconstructions. The case of bistatic ultrasound imaging, where the elliptical Radon transform is appropriate, is also discussed.

Vaidyanathan, Ravi Shankar; Lewis, Matthew A.; Ambartsoumian, Gaik; Aktosun, Tuncay

2009-02-01

40

Spray-ring mounting assembly  

SciTech Connect

This patent describes a thrust augmentation combustor for a gas turbine engine having a duct, an assembly for mounting a spray ring or the like to the duct and having improved vibration isolation characteristics. It comprises a clevis arranged for fixed mounting to the duct, a circular pin mounted in the clevis, an elongated slider having a central circular axial bore and mounted for rotational movement on the pin, the slider having at least two parallel exterior sidewalls, and a bracket for mounting the spray ring having an elongated bore mounted on the slider.

Barcza, W.K.; Concordia, M.J.

1992-07-07

41

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

42

Ring Around a Galaxy  

NASA Technical Reports Server (NTRS)

Space Telescope Science Institute astronomers are giving the public chances to decide where to aim NASA's Hubble Space Telescope. Guided by 8,000 Internet voters, Hubble has already been used to take a close-up, multi-color picture of the most popular object from a list of candidates, the extraordinary 'polar-ring' galaxy NGC 4650A. Located about 130 million light-years away, NGC 4650A is one of only 100 known polar-ring galaxies. Their unusual disk-ring structure is not yet understood fully. One possibility is that polar rings are the remnants of colossal collisions between two galaxies sometime in the distant past, probably at least 1 billion years ago. What is left of one galaxy has become the rotating inner disk of old red stars in the center. Meanwhile, another smaller galaxy which ventured too close was probably severely damaged or destroyed. The bright bluish clumps, which are especially prominent in the outer parts of the ring, are regions containing luminous young stars, examples of stellar rebirth from the remnants of an ancient galactic disaster. The polar ring appears to be highly distorted. No regular spiral pattern stands out in the main part of the ring, and the presence of young stars below the main ring on one side and above on the other shows that the ring is warped and does not lie in one plane. Determining the typical ages of the stars in the polar ring is an initial goal of our Polar Ring Science Team that can provide a clue to the evolution of this unusual galaxy. The HST exposures were acquired by the Hubble Heritage Team, consisting of Keith Noll, Howard Bond, Carol Christian, Jayanne English, Lisa Frattare, Forrest Hamilton, Anne Kinney and Zolt Levay, and guest collaborators Jay Gallagher (University of Wisconsin-Madison), Lynn Matthews (National Radio Astronomy Observatory-Charlottesville), and Linda Sparke (University of Wisconsin-Madison).

1999-01-01

43

Jupiter's Main Ring  

NASA Technical Reports Server (NTRS)

A mosaic of four images taken through the clear filter (610 nanometers) of the solid state imaging (CCD) system aboard NASA's Galileo spacecraft on November 8, 1996, at a resolution of approximately 46 kilometers (km) per picture element (pixel) along the rings; however, because the spacecraft was only about 0.5 degrees above the ring plane, the image is highly foreshortened in the vertical direction. The images were obtained when Galileo was in Jupiter's shadow peering back toward the Sun; the ring was approximately 2,300,000 kilometers (km) away. The arc on the far right of the image is produced by sunlight scattered by small particles comprising Jupiter's upper atmospheric haze. The ring also efficiently scatters light, indicating that much of its brightness is due to particles that are microns or less in diameter. Such small particles are believed to have human-scale lifetimes, i.e., very brief compared to the solar system's age.

Jupiter's ring system is composed of three parts -- a flat main ring, a lenticular halo interior to the main ring, and the gossamer ring, which lies exterior to the main ring. The near and far arms of Jupiter's main ring extend horizontally across the mosaic, joining together at the ring's ansa, on the far left side of the figure. The near arm of the ring appears to be abruptly truncated close to the planet, at the point where it passes into Jupiter's shadow. Some radial structure is barely visible across the ring's ansa. A faint mist of particles can be seen above and below the main rings; this vertically extended 'halo' is unusual in planetary rings, and is probably caused by electromagnetic forces pushing the smallest grains out of the ring plane. Because of shadowing, the halo is not visible close to Jupiter in the lower right part of the mosaic.

Jupiter's main ring is a thin strand of material encircling the planet. The diffuse innermost boundary begins at approximately 123,000 km. The main ring's outer radius is found to be at 128,940 +/-50 km, slightly less than the Voyager value of 129,130 +/-100 km, but very close to the orbit of the satellite Adrastea (128,980 km). The main ring exhibits a marked drop in brightness at 127,849 +/-50 km, lying almost atop the orbit of the Jovian moon Metis at 127,978 km. Satellites seem to affect the structure of even tenuous rings like that found at Jupiter.

The Jet Propulsion Laboratory, Pasadena, CA manages the mission for NASA's Office of Space Science, Washington, DC.

This image and other images and data received from Galileo are posted on the World Wide Web, on the Galileo mission home page at: http://galileo.jpl.nasa.gov. Background information and educational context for the images can be found at: http:/ /www.jpl.nasa.gov/galileo/sepo.

1997-01-01

44

Planetary rings  

NASA Astrophysics Data System (ADS)

In our solar system, planetary rings are found around all the giant planets, showing spectacular variety. Jupiter's thin ring system is composed mostly of dust. Saturn's rings are the largest and best studied, and the target of the NASA/ESA Cassini space mission that will begin orbiting Saturn in 2004. Its ring system consists of the broad A and B rings (separated by the Cassini Division) and the optically thinner C and D rings. Outside the main rings are the narrow `braided' F ring and rings E and G. Uranus has ten narrow, sometimes eccentric rings and a family of dust bands. Neptune has three distinct rings (Galle, LeVervier, and Adams); the outermost Adams ring is patchy, with the thicker segments termed `arcs.' All the ring systems have moons interspersed, which sculpt, collect, and release ring material. Moons are the likely parents of the present rings, ground down by meteorites and destroyed randomly to produce the relatively short-lived ring systems. Thus, we observe the natural stochastic results of birth and death processes when we examine the rings closely. Ring systems are relatively nearby and provide a natural laboratory for phenomena in flattened disks, including the nebula around our Sun that gave rise to the planets. Cassini will observe Saturn's rings and the numerous physical phenomena occurring within them close-up from 2004 to 2008, refining and possibly redefining our view of ring physics.

Esposito, Larry W.

2002-12-01

45

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

46

6. EXTERIOR OF REAR (EAST END) AND NORTH SIDE SHOWING ...  

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

6. EXTERIOR OF REAR (EAST END) AND NORTH SIDE SHOWING ASBESTOS SIDING, BACKYARD LAWN, AND CLOTHESLINE. VIEW TO SOUTHWEST. - Bishop Creek Hydroelectric System, Plant 4, Worker Cottage, Bishop Creek, Bishop, Inyo County, CA

47

Looking Southwest to Dry and Wet Exterior Scrubbers at Rear ...  

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

Looking Southwest to Dry and Wet Exterior Scrubbers at Rear of Oxide Building - Hematite Fuel Fabrication Facility, Oxide Building & Oxide Loading Dock, 3300 State Road P, Festus, Jefferson County, MO

48

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

49

3. EXTERIOR NORTH SIDE DETAIL VIEW, FACING SOUTHWEST. THE ROOFLINE ...  

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

3. EXTERIOR NORTH SIDE DETAIL VIEW, FACING SOUTHWEST. THE ROOFLINE CLEARLY SHOWS THE ATTACHMENTS TO THE NORTH (FORMERLY CANOPY 764) AND EAST (FORMERLY BUILDING 13). - NASA Industrial Plant, Maintenance Facility, 12214 Lakewood Boulevard, Downey, Los Angeles County, CA

50

6. EXTERIOR NORTHEAST CORNER VIEW, FACING SOUTHWEST. CLEAR SHOP OF ...  

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

6. EXTERIOR NORTHEAST CORNER VIEW, FACING SOUTHWEST. CLEAR SHOP OF CANOPY 723 AS WELL NORTH FACADES OF ADDITIONS TO BUILDING 10. - NASA Industrial Plant, Maintenance Facility, 12214 Lakewood Boulevard, Downey, Los Angeles County, CA

51

EXTERIOR VIEW, BLAST FURNACE NO. 3 (JANE FURNACE) CENTER, NO. ...  

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

EXTERIOR VIEW, BLAST FURNACE NO. 3 (JANE FURNACE) CENTER, NO. 3 CAST HOUSE TO THE LEFT, WEST ORE BRIDGE TO THE RIGHT. - Pittsburgh Steel Company, Monessen Works, Blast Furnace No. 3, Donner Avenue, Monessen, Westmoreland County, PA

52

Facility No. 175, exterior oblique view of northeast and northwest ...  

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

Facility No. 175, exterior oblique view of northeast and northwest sides, corner of Facility No. 176 is in background - U.S. Naval Base, Pearl Harbor, Landplane Hangar Type, Wasp Boulevard and Gambier Bay Street, Pearl City, Honolulu County, HI

53

3. EXTERIOR VIEW, SHOWING CRANE SYSTEM BETWEEN BUILDING 20 AND ...  

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

3. EXTERIOR VIEW, SHOWING CRANE SYSTEM BETWEEN BUILDING 20 AND 20A. - Wright-Patterson Air Force Base, Area B, Building No. 20A, Propeller Test Complex, Seventh Street, from E to G Streets, Dayton, Montgomery County, OH

54

5. EXTERIOR OF SOUTH SIDE SHOWING 1967 REAR ADDITION AND ...  

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

5. EXTERIOR OF SOUTH SIDE SHOWING 1967 REAR ADDITION AND DOOR TO KITCHEN/UTILITY AREA AT PHOTO CENTER BEHIND SHRUB. VIEW TO NORTHWEST. - Bishop Creek Hydroelectric System, Plant 4, Worker Cottage, Bishop Creek, Bishop, Inyo County, CA

55

EXTERIOR VIEW, LOOKING EAST, FRONT FACADE AND ENTRANCE TO COMPANY ...  

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

EXTERIOR VIEW, LOOKING EAST, FRONT FACADE AND ENTRANCE TO COMPANY SCHOOL FOR CHILDREN OF BLACK TCI-US STEEL RED ORE MINE WORKERS - Company School for Blacks, 413 Morgan Road, Bessemer, Jefferson County, AL

56

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

57

12. DETAIL EXTERIOR VIEW OF FISH PASSAGE BETWEEN THE SOUTH ...  

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

12. DETAIL EXTERIOR VIEW OF FISH PASSAGE BETWEEN THE SOUTH END OF POWERHOUSE #1 AND NAVIGATION LOCK #1. - Bonneville Project, Navigation Lock No. 1, Oregon shore of Columbia River near first Powerhouse, Bonneville, Multnomah County, OR

58

9. DETAIL EXTERIOR VIEW LOOKING SOUTHEAST, SHOWING DOWNSTREAM MITER GATES ...  

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

9. DETAIL EXTERIOR VIEW LOOKING SOUTHEAST, SHOWING DOWNSTREAM MITER GATES FOR NAVIGATION LOCK #1. - Bonneville Project, Navigation Lock No. 1, Oregon shore of Columbia River near first Powerhouse, Bonneville, Multnomah County, OR

59

2. GENERAL EXTERIOR VIEW LOOKING WEST, SHOWING CHANNEL DOWNSTREAM FROM ...  

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

2. GENERAL EXTERIOR VIEW LOOKING WEST, SHOWING CHANNEL DOWNSTREAM FROM NAVIGATION LOCK #1; MOVABLE BRIDGE IS VISIBLE IN LEFT FOREGROUND. - Bonneville Project, Navigation Lock No. 1, Oregon shore of Columbia River near first Powerhouse, Bonneville, Multnomah County, OR

60

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

61

14. EAST ELEVATION, COTTAGE. EXTERIOR NEARLY RESTORED. INTERIOR UNDERGOING RESTORATION. ...  

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

14. EAST ELEVATION, COTTAGE. EXTERIOR NEARLY RESTORED. INTERIOR UNDERGOING RESTORATION. EUCALYPTUS TREE PLANTED BY GERTRUDE KEIL PLANNED FOR REMOVAL. - Gold Ridge Farm, 7777 Bodega Avenue, Sebastopol, Sonoma County, CA

62

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

63

5. EXTERIOR VIEW OF ELECTROSTATIC PRECIPITATORS FOR OPEN HEARTH NO. ...  

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

5. EXTERIOR VIEW OF ELECTROSTATIC PRECIPITATORS FOR OPEN HEARTH NO. 5 (Martin Stupich) - U.S. Steel Homestead Works, Open Hearth Steelmaking Plant, Along Monongahela River, Homestead, Allegheny County, PA

64

4. EXTERIOR VIEW OF ELECTROSTATIC PRECIPITATORS FOR OPEN HEARTH NO. ...  

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

4. EXTERIOR VIEW OF ELECTROSTATIC PRECIPITATORS FOR OPEN HEARTH NO. 5 (Martin Stupich) - U.S. Steel Homestead Works, Open Hearth Steelmaking Plant, Along Monongahela River, Homestead, Allegheny County, PA

65

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

66

EXTERIOR VIEW SHOWING THE OILOSTATIC TERMINALS IN THE GENERATING PLANT ...  

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

EXTERIOR VIEW SHOWING THE OILOSTATIC TERMINALS IN THE GENERATING PLANT SWITCH YARD. - Wilson Dam & Hydroelectric Plant, Oilostatic Transmission System, Spanning Tennessee River at Wilson Dam Road (Route 133), Muscle Shoals, Colbert County, AL

67

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

68

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

69

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

70

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

71

Perspective of the exterior of the assistant superintendent's house with ...  

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

Perspective of the exterior of the assistant superintendent's house with the superintendent's house in the background. View to the west, southwest. - Prairie Creek Fish Hatchery, Hwy. 101, Orick, Humboldt County, CA

72

Detail view of exterior siding and "notching" at south corner ...  

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

Detail view of exterior siding and "notching" at south corner - Glacier Park Villas, Edna Sears Graham Cabin, South of Lake McDonald Lodge on Lake Mcdonald Lodge Loop Road, Lake McDonald, Flathead County, MT

73

16. Exterior of assembly building (mold loft #2) used for ...  

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

16. Exterior of assembly building (mold loft #2) used for runabout production, constructed CA. 1932. Most of the production run boats were assembled here. - Barbour Boat Works, Tryon Palace Drive, New Bern, Craven County, NC

74

3. EXTERIOR OF SOUTH SIDE SHOWING DOOR TO ENCLOSED FRONT ...  

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

3. EXTERIOR OF SOUTH SIDE SHOWING DOOR TO ENCLOSED FRONT PORCH ON PHOTO RIGHT AND DOOR TO KITCHEN AT PHOTO LEFT. VIEW TO NORTH. - Bishop Creek Hydroelectric System, Control Station, Worker Cottage, Bishop Creek, Bishop, Inyo County, CA

75

EXTERIOR VIEW OF FORTYTHIRD STREET STREETSCAPE WITH BUNGALOWS, SIDEWALKS AND ...  

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

EXTERIOR VIEW OF FORTY-THIRD STREET STREETSCAPE WITH BUNGALOWS, SIDEWALKS AND STREET TREES ORIGINAL TO THE JEMISON AND COMPANY DEVELOPMENT OF THE 'MODEL' INDUSTRIAL TOWN. - City of Fairfield, Fairfield, Jefferson County, AL

76

2. EXTERIOR SITE VIEW OF STRUCTURE 408 AND RADOME 409 ...  

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

2. EXTERIOR SITE VIEW OF STRUCTURE 408 AND RADOME 409 ON RIGHT, LOOKING NORTHEAST. - Mill Valley Air Force Station, Radar Domes, East Ridgecrest Boulevard, Mount Tamalpais, Mill Valley, Marin County, CA

77

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

78

3. EXTERIOR, VIEW TO NORTHEAST, AT NEW SITE (HERITAGE PARK). ...  

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

3. EXTERIOR, VIEW TO NORTHEAST, AT NEW SITE (HERITAGE PARK). SHERMAN-GILBERT HOUSE AT LEFT; BUSHYLEAD HOUSE IN CENTER; CHRISTIAN HOUSE AT RIGHT - Sherman-Gilbert House, Heritage Park, San Diego, San Diego County, CA

79

EXTERIOR VIEW, LOOKING WEST, WITH CENTER SPAN EXTENDING ACROSS WARRIOR ...  

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

EXTERIOR VIEW, LOOKING WEST, WITH CENTER SPAN EXTENDING ACROSS WARRIOR RIVER AND COAL BARGES (LEFT). - Gulf, Mobile & Ohio Railroad Bridge, Spans Black Warrior River between Northport & Tuscaloosa, Tuscaloosa, Tuscaloosa County, AL

80

General exterior view to northeast (Building 203 in background right) ...  

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

General exterior view to northeast (Building 203 in background right) - Charlestown Navy Yard, Oxygen Plant, Midway along northern boundary of Charlestown Navy Yard, on Little Mystic Channel, near junction of Eighteenth Street & Fourth Avenue, Boston, Suffolk County, MA

81

9. TROJAN MILL, EXTERIOR FROM NORTHWEST, c. 191828. WINTER SNOW ...  

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

9. TROJAN MILL, EXTERIOR FROM NORTHWEST, c. 1918-28. WINTER SNOW SHOWS LINE OF CRUDE ORE BIN STAIR. CREDIT JW. - Bald Mountain Gold Mill, Nevada Gulch at head of False Bottom Creek, Lead, Lawrence County, SD

82

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

83

Marguerite Arnet Residence, exterior roof structure detail, looking northwest. ...  

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

Marguerite Arnet Residence, exterior roof structure detail, looking northwest. - Adam & Bessie Arnet Homestead, Marguerite Arnet Residence, 560 feet northeast of Adam & Bessie Arnet Residence, Model, Las Animas County, CO

84

EXTERIOR VIEW, LOOKING NORTHEAST, WITH SLAB YARD. AT RIGHT IS ...  

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

EXTERIOR VIEW, LOOKING NORTHEAST, WITH SLAB YARD. AT RIGHT IS HOT STRIP MILL BUILDING AND FURNACE. VIEW AT LEFT IS TOWARD CUT TO LENGTH BUILDING. - Central Iron Foundry Site, 1700 Holt Road, Holt, Tuscaloosa County, AL

85

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

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

1. EXTERIOR VIEW, LOOKING SOUTH, WITH FRONT AND SIDE FACADE, SHOP BUILDING. - Tennessee Coal & Iron-U.S. Steel Surface Plant, Shop, East of State Route 150, on South slope of Red Mountain, Bessemer, Jefferson County, AL

86

Detail exterior view looking north showing piping system adjacent to ...  

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

Detail exterior view looking north showing piping system adjacent to engine house. Gas cooling system is on far right. - Burnsville Natural Gas Pumping Station, Saratoga Avenue between Little Kanawha River & C&O Railroad line, Burnsville, Braxton County, WV

87

Exterior view of boiler house looking southwest with steam exhaust ...  

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

Exterior view of boiler house looking southwest with steam exhaust vents in foreground. Engine house is on left. - Burnsville Natural Gas Pumping Station, Saratoga Avenue between Little Kanawha River & C&O Railroad line, Burnsville, Braxton County, WV

88

Detail exterior view looking northwest showing field gas cleaner in ...  

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

Detail exterior view looking northwest showing field gas cleaner in the center. - Burnsville Natural Gas Pumping Station, Saratoga Avenue between Little Kanawha River & C&O Railroad line, Burnsville, Braxton County, WV

89

Detail exterior view looking southwest of gas cooling system. Engine ...  

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

Detail exterior view looking southwest of gas cooling system. Engine house is shown in right background. - Burnsville Natural Gas Pumping Station, Saratoga Avenue between Little Kanawha River & C&O Railroad line, Burnsville, Braxton County, WV

90

Exterior view looking northwest with construction facilities of "new" pumping ...  

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

Exterior view looking northwest with construction facilities of "new" pumping station in foreground. Doug Hine is man in picture. - Burnsville Natural Gas Pumping Station, Saratoga Avenue between Little Kanawha River & C&O Railroad line, Burnsville, Braxton County, WV

91

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

92

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

93

Electrical cable connector-clamp has smooth exterior surface  

NASA Technical Reports Server (NTRS)

Electrical cable connector-clamp fitted with a collet has a smooth exterior surface that can be easily gripped. The collet clamps a portion of the cable and provides for connecting it to a standard electrical connector.

1965-01-01

94

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

95

3. EXTERIOR VIEW OF THE REAR AND NORTHWEST SIDE OF ...  

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

3. EXTERIOR VIEW OF THE REAR AND NORTHWEST SIDE OF BUILDING 660 FACING EAST. - U.S. Naval Base, Pearl Harbor, Ship Repair Shop, Morton Street between Coe & Craig Streets, Pearl City, Honolulu County, HI

96

1. EXTERIOR VIEW OF THE FRONT AND SOUTHEAST SIDE OF ...  

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

1. EXTERIOR VIEW OF THE FRONT AND SOUTHEAST SIDE OF BUILDING 660 FACING WEST. - U.S. Naval Base, Pearl Harbor, Ship Repair Shop, Morton Street between Coe & Craig Streets, Pearl City, Honolulu County, HI

97

2. EXTERIOR VIEW OF THE REAR AND SOUTHEAST SIDE OF ...  

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

2. EXTERIOR VIEW OF THE REAR AND SOUTHEAST SIDE OF BUILDING 660 FACING NORTH. - U.S. Naval Base, Pearl Harbor, Ship Repair Shop, Morton Street between Coe & Craig Streets, Pearl City, Honolulu County, HI

98

1. GENERAL EXTERIOR VIEW OF THE ELECTRIC FURNACE STEELMAKING PLANT ...  

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

1. GENERAL EXTERIOR VIEW OF THE ELECTRIC FURNACE STEELMAKING PLANT LOOKING NORTHEAST. - U.S. Steel Duquesne Works, Electric Furnace Steelmaking Plant, Along Monongahela River, Duquesne, Allegheny County, PA

99

3. EXTERIOR VIEW INTO PART OF OPEN HEARTH NO. 5 ...  

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

3. EXTERIOR VIEW INTO PART OF OPEN HEARTH NO. 5 WITH RAILROAD TRESTLE IN FOREGROUND. (Jet Lowe) - U.S. Steel Homestead Works, Open Hearth Steelmaking Plant, Along Monongahela River, Homestead, Allegheny County, PA

100

9. Interior view of large conference room; showing exterior windows; ...  

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

9. Interior view of large conference room; showing exterior windows; middle of west side of building on main floor; view to northwest. - Ellsworth Air Force Base, Mess & Administration Building, 1561 Ellsworth Street, Blackhawk, Meade County, SD

101

9. Interior view of conference room; showing exterior windows; northeast ...  

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

9. Interior view of conference room; showing exterior windows; northeast corner of north wing; view to northeast. - Ellsworth Air Force Base, Administration Office, 2704 George Drive, Blackhawk, Meade County, SD

102

1. EXTERIOR VIEW, FRONT (EAST) FACADE WITH FIVE POINTS FOUNTAIN ...  

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

1. EXTERIOR VIEW, FRONT (EAST) FACADE WITH FIVE POINTS FOUNTAIN (CENTER), DULION APARTMENTS AND ELEVENTH AVENUE SOUTH (RIGHT). VIEW TAKEN JUST AFTER BIRMINGHAM BLIZZARD OF 1993. - Highlands United Methodist Church, 1045 Twentieth Street South, Birmingham, Jefferson County, AL

103

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

104

Exterior oblique view of the southeast and southwest sides. Taken ...  

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

Exterior oblique view of the southeast and southwest sides. Taken from Facility 6. View facing north - U.S. Naval Base, Pearl Harbor, Paint Shop & Rigging Loft, Sixth Street between Avenues E & G, Pearl City, Honolulu County, HI

105

Exterior view of the south side from the roof of ...  

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

Exterior view of the south side from the roof of facility 1670. View facing north-northeast - U.S. Naval Base, Pearl Harbor, Paint Shop & Rigging Loft, Sixth Street between Avenues E & G, Pearl City, Honolulu County, HI

106

Exterior oblique view of the northwest end and northeast side. ...  

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

Exterior oblique view of the northwest end and northeast side. View facing south-southeast - U.S. Naval Base, Pearl Harbor, Paint Shop & Rigging Loft, Sixth Street between Avenues E & G, Pearl City, Honolulu County, HI

107

Exterior detail, west elevation showing identical window bays set into ...  

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

Exterior detail, west elevation showing identical window bays set into brick wall which tapers from thick at grade to thin at the higher stories; view to east. - Lawrence Machine Shop, Building No. 4, 70 General Street, Lawrence, Essex County, MA

108

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

109

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

110

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

111

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

112

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

113

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

114

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

115

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

116

12. Exterior detail view of roof structure at eave, showing ...  

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

12. Exterior detail view of roof structure at eave, showing exposed rafter tails, skip sheathing and gutter - American Railway Express Company Freight Building, 1060 Northeast Division Street, Bend, Deschutes County, OR

117

1. Exterior, corner, wall, and barrel of cannon used to ...  

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

1. Exterior, corner, wall, and barrel of cannon used to protect corner of building from cart wheels. 1960. - Jefferson Barracks, Brick & Stone Powder Magazine, Jefferson Barracks, St. Louis County, MO

118

Exterior oblique view of the east side of Building 8 ...  

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

Exterior oblique view of the east side of Building 8 from playground courtyard looking northwest - North Beach Place, 461 Bay Street, 560 Francisco Street, 461 Bay Street, 560 Francisco Street, San Francisco, San Francisco County, CA

119

EXTERIOR VIEW, LOOKING SOUTH, NEW AVENUE WITH A FORMER TCIUS ...  

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

EXTERIOR VIEW, LOOKING SOUTH, NEW AVENUE WITH A FORMER TCI-US STEEL "DOUBLE THREE ROOM" COMPANY HOUSE BUILT FOR BLACK ORE MINERS AND THEIR FAMILIES DURING WORLD WAR I - New Village Worker Houses, New Avenue, Bessemer, Jefferson County, AL

120

EXTERIOR VIEW, LOOKING SOUTH, NEW AVENUE WITH A FORMER TCIUS ...  

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

EXTERIOR VIEW, LOOKING SOUTH, NEW AVENUE WITH A FORMER TCI-US STEEL 'DOUBLE THREE ROOM' COMPANY HOUSE BUILT FOR BLACK ORE MINERS AND THEIR FAMILIES DURING WORLD WAR I. - New Village Worker Houses, New Avenue, Bessemer, Jefferson County, AL

121

Photographic copy of reproduced photograph dated 1942. Exterior view, west ...  

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

Photographic copy of reproduced photograph dated 1942. Exterior view, west elevation. Building camouflaged during World War II. - Grand Central Air Terminal, 1310 Air Way, Glendale, Los Angeles County, CA

122

19. Jet Lowe, Photographer, July 1978. EXTERIOR VIEW OF MASSCOPPER ...  

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

19. Jet Lowe, Photographer, July 1978. EXTERIOR VIEW OF MASS-COPPER TUBE (FOREGROUND); STAMP ROCK BIN; AND PORTION OF BATTER BRACE. SHAFT-ROCKHOUSE NO. 2, 1908. - Quincy Mining Company, Hancock, Houghton County, MI

123

55. Jet Lowe, Photographer, July 1978. EXTERIOR VIEW OF SOUTH ...  

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

55. Jet Lowe, Photographer, July 1978. EXTERIOR VIEW OF SOUTH ELEVATIONS OF 1895 NO. 2 HOIST HOUSE (LEFT) AND 1918 HOIST HOUSE WITH 1908 SHAFT-ROCKHOUSE IN THE DISTANCE. - Quincy Mining Company, Hancock, Houghton County, MI

124

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

125

2. EXTERIOR OF THE STORAGE SHED LOCATED NEAR THE POOL, ...  

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

2. EXTERIOR OF THE STORAGE SHED LOCATED NEAR THE POOL, BUILDING 305 AND THE TANK, LOOKING NORTHWEST. - Mill Valley Air Force Station, Storage Shed & Tank, East Ridgecrest Boulevard, Mount Tamalpais, Mill Valley, Marin County, CA

126

1. EXTERIOR VIEW OF THE EXPLOSIVE STORAGE SHED, BUILDING 306, ...  

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

1. EXTERIOR VIEW OF THE EXPLOSIVE STORAGE SHED, BUILDING 306, LOOKING NORTHWEST. - Mill Valley Air Force Station, Explosive Storage, East Ridgecrest Boulevard, Mount Tamalpais, Mill Valley, Marin County, CA

127

1. EXTERIOR OF THE STORAGE SHED LOCATED NEAR THE POOL, ...  

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

1. EXTERIOR OF THE STORAGE SHED LOCATED NEAR THE POOL, BUILDING 305 AND THE TANK, LOOKING EAST. - Mill Valley Air Force Station, Storage Shed & Tank, East Ridgecrest Boulevard, Mount Tamalpais, Mill Valley, Marin County, CA

128

Transverse electromagnetic horn antenna with resistively-loaded exterior surfaces  

DOEpatents

An improved transverse electromagnetic (TEM) horn antenna comprises a resistive loading material on the exterior surfaces of the antenna plates. The resistive loading material attenuates or inhibits currents on the exterior surfaces of the TEM horn antenna. The exterior electromagnetic fields are of opposite polarity in comparison to the primary and desired interior electromagnetic field, thus inherently cause partial cancellation of the interior wave upon radiation or upon reception. Reducing the exterior fields increases the radiation efficiency of the antenna by reducing the cancellation of the primary interior field (supported by the interior surface currents). This increases the transmit gain and receive sensitivity of the TEM horn antenna, as well as improving the transient (time-domain) response.

Aurand, John F. (Edgewood, NM)

1999-01-01

129

7. EXTERIOR OF POWER PLANT BUILDING LOOKING NORTHWEST. DETAIL OF ...  

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

7. EXTERIOR OF POWER PLANT BUILDING LOOKING NORTHWEST. DETAIL OF TRASH RACK IN FOREGROUND. - Potomac Power Plant, On West Virginia Shore of Potomac River, about 1 mile upriver from confluence with Shenandoah River, Harpers Ferry, Jefferson County, WV

130

3. EXTERIOR VIEW TO THE NORTHEAST OF A RAILROAD CAR ...  

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

3. EXTERIOR VIEW TO THE NORTHEAST OF A RAILROAD CAR ON THE TRACKS AND THE PARTS OF AN ENGINE STAND. - Nevada Test Site, Pluto Facility, Area 26, Wahmonie Flats, Cane Spring Road, Mercury, Nye County, NV

131

4. EXTERIOR VIEW TO THE NORTH OF THE WATER TOWER ...  

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

4. EXTERIOR VIEW TO THE NORTH OF THE WATER TOWER AND MISCELLANEOUS EQUIPMENT ALONG THE EAST SIDE OF THE COMPOUND. - Nevada Test Site, Pluto Facility, Area 26, Wahmonie Flats, Cane Spring Road, Mercury, Nye County, NV

132

1. EXTERIOR VIEW LOOKING NORTHWEST; NOTE BRICK FLUE & WATER ...  

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

1. EXTERIOR VIEW LOOKING NORTHWEST; NOTE BRICK FLUE & WATER STORAGE TANK TO RIGHT, 1973-ERA ADDITION TO LEFT - Fort McCoy, Building No. T-10111, Southeast of Auxiliary Boiler House, Block 10, Sparta, Monroe County, WI

133

28. Launch Area, Generator Building, detail of exterior vent shutters ...  

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

28. Launch Area, Generator Building, detail of exterior vent shutters VIEW SOUTHWEST, EAST ELEVATION - NIKE Missile Battery PR-79, Launch Area, East Windsor Road south of State Route 101, Foster, Providence County, RI

134

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

135

Exteriors with Hull Damage as of 2008, Port Profile, Stern ...  

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

Exteriors with Hull Damage as of 2008, Port Profile, Stern Profile, Bow Profile, Loose Plate - Sub Marine Explorer, Located along the beach of Isla San Telmo, Pearl Islands, Isla San Telmo, Former Panama Canal Zone, CZ

136

Exterior building details of Building C, east façade: rolling metal ...  

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

Exterior building details of Building C, east façade: rolling metal gate and fence, spiral and inclined staircases; southwesterly view - San Quentin State Prison, Building 22, Point San Quentin, San Quentin, Marin County, CA

137

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

138

50. Exterior view of yard with detail of concrete keel ...  

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

50. Exterior view of yard with detail of concrete keel block for laying vessels on. Steel fabrication builders in background. American traveling yard crane. - Barbour Boat Works, Tryon Palace Drive, New Bern, Craven County, NC

139

42. Exterior view of dockage and barracks on piers used ...  

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

42. Exterior view of dockage and barracks on piers used during construction of minesweepers. Now used for storage. Sunken barge crane in foreground. - Barbour Boat Works, Tryon Palace Drive, New Bern, Craven County, NC

140

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

141

12. Exterior of main offices, stock room and payroll offices ...  

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

12. Exterior of main offices, stock room and payroll offices view from yard (middle building formerly mold loft #1). Building at left is stock room desk and offices. - Barbour Boat Works, Tryon Palace Drive, New Bern, Craven County, NC

142

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

143

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

144

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

145

13. Exterior of main offices and stock room from yard. ...  

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

13. Exterior of main offices and stock room from yard. Middle Building formerly mold loft #1. Building at left is stock room desk and offices. - Barbour Boat Works, Tryon Palace Drive, New Bern, Craven County, NC

146

8. EXTERIOR DETAIL OF FRONT ENTRY PORCH SHOWING ORIGINAL ARTS ...  

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

8. EXTERIOR DETAIL OF FRONT ENTRY PORCH SHOWING ORIGINAL ARTS AND CRAFTS STYLE ELECTRICAL LANTERN. VIEW TO SOUTH. - Rush Creek Hydroelectric System, Clubhouse Cottage, Rush Creek, June Lake, Mono County, CA

147

2. EXTERIOR VIEW OF HILLSIDE PLANT ENTRANCE. NOTE CONTRAST BETWEEN ...  

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

2. EXTERIOR VIEW OF HILLSIDE PLANT ENTRANCE. NOTE CONTRAST BETWEEN THIS MODERN ADDITION AND THE OLDER SECTION OF THE MILL VISIBLE IN HAER No. GA-130-1. - Hillside Cotton Mill, 1300 Brownwood Avenue, La Grange, Troup County, GA

148

Detail of the exterior "selfclosing" sliding door with vent above. ...  

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

Detail of the exterior "self-closing" sliding door with vent above. View facing northeast - U.S. Naval Base, Pearl Harbor, Paint & Oil Storehouse, Avenue D near Seventh Street intersection, Pearl City, Honolulu County, HI

149

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

150

Storage Rings  

Microsoft Academic Search

Storage rings are circular machines that store particle beams at a constant energy. Beams are stored in rings without acceleration for a number of reasons (Tab. 1). Storage rings are used in high-energy, nuclear, atomic, and molecular physics, as well as for experiments in chemistry, material and life sciences. Parameters for storage rings such as particle species, energy, beam intensity,

2011-01-01

151

Planetary Rings  

Microsoft Academic Search

The past two decades have witnessed dramatic changes in our view and understanding of planetary rings. We now know that each of the giant planets in the Solar System possesses a complex and unique ring system. Recent studies have identified complex gravitational interactions between the rings and their retinues of attendant satellites. Among the four known ring systems, we see

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

2002-01-01

152

Identification of convective heat loss on exterior cavity wall assemblies  

NASA Astrophysics Data System (ADS)

Most present day low and medium rise buildings constructed in Canada use some form of cavity wall design for their exterior walls. These types of wall assemblies use a broad range of cladding materials such as brick, stone, wood, sheet metal, porcelain enamel or metal panels, cementitious materials and plastics. The interior assemblies of these walls include the air barrier, vapor barrier and insulation layers. The cladding is separated from the interior wall assembly by an air space of varying thickness. Dependent upon the temperature differential between the interior and exterior, the temperature between the outer surface of the interior wall assembly and the inner surface of the exterior cladding under conditions in which air movement is restricted will give rise to convective heat loss mechanisms. This paper will look at how these convective heat loss patterns manifest themselves as thermal patterns on exterior surfaces of cladding materials. Similar details will be illustrated under various pressure differential conditions through the entire building envelope assembly. Various types of exterior wall assemblies will be discussed.

Colantonio, Antonio

1999-03-01

153

The galactic magnetic field  

Microsoft Academic Search

Estimates for the scale, geometry and strength of the magnetic field in the galactic system can be derived from observations of polarization properties of radio emission from the Galaxy, extragalactic radio sources and pulsars, and polarization of starlight. Within distances of about 500 parsecs (1 parsec = 3.26 lightyears) from the solar system the magnetic field is directed towards galactic

T A Spoelstra; T. A. T

1977-01-01

154

Ring dynamics  

NASA Technical Reports Server (NTRS)

Theoretical models of planetary-ring dynamics are discussed in a detailed analytical review and illustrated with graphs and diagrams. The streamline concept is introduced, and the phenomena associated with the transport of angular momentum are described. Particular attention is then given to (1) broad rings like those of Saturn (shepherding, density-wave excitation, gaps, bending-wave excitation, multiringlet structures, inner-edge shepherding, and the possibility of polar rings around Neptune), (2) narrow rings like those of Uranus (shepherding, ring shapes, and a self-gravity model of rigid precession), and (3) ring arcs like those seen in stellar-occultation observations of Neptune.

Borderies, Nicole

1989-01-01

155

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

156

The generalization of the exterior square of a Bieberbach group  

NASA Astrophysics Data System (ADS)

The exterior square of a group is one of the homological functors which were originated in the homotopy theory. Meanwhile, a Bieberbach group is a torsion free crystallographic group. A Bieberbach group with cyclic point group of order two, C2, of dimension n can be defined as the direct product of that group of the smallest dimension with a free abelian group. Using the group presentation and commutator generating sequence, the exterior square of a Bieberbach group with point group C2 of dimension n is computed.

Masri, Rohaidah; Hassim, Hazzirah Izzati Mat; Sarmin, Nor Haniza; Ali, Nor Muhainiah Mohd; Idrus, Nor'ashiqin Mohd

2014-06-01

157

[Spatial orientation of pilot using a cockpit exterior surveillance system].  

PubMed

Spatial orientation of pilots using a cockpit exterior surveillance system was tested in real nighttime helicopter flights. Major factors complicating adequate spatial orientation and provoking visual illusions in pilots are lack of information for spatial depth (relation) perception in two-dimensional TV images altering their position along the horizontal and vertical lines of trajectory and simultaneous piloting and target search-identification operations. Reliability of pilot's spatial orientation could be improved by displaying on the exterior imaging screen also relevant flight navigation parameters. PMID:24490280

Chuntul, A V; Lapa, V V; Davydov, V V

2013-01-01

158

Properties of Galactic B Supergiants  

NASA Astrophysics Data System (ADS)

Physical and wind properties of Galactic B supergiants are presented based upon non-LTE line blanketed model atmospheres, including Sher 25 toward the NGC 3603 cluster. We compare H? derived wind densities with recent results for SMC B supergiants and generally confirm theoretical expectations for stronger winds amongst Galactic supergiants. Mid B supergiant winds are substantially weaker than predictions from current radiatively driven wind theory, a problem which is exacerbated if winds are already clumped in the H? line forming region. We find that the so-called `bistability jump' at B1 (Teff ˜ 21kK) from Lamers et al. is rather a more gradual downward trend. CNO elemental abundances, including Sher 25, reveal partially processed material at their surfaces. In general, these are in good agreement with evolutionary predictions for blue supergiants evolving redward accounting for rotational mixing. A few cases, including HD 152236 (?1 Sco), exhibit strongly processed material which is more typical of Luminous Blue Variables. Our derived photospheric [N/O] ratio for Sher 25 agrees with that for its ring nebula, although a higher degree of CNO processing would be expected if the nebula originated during a red supergiant phase, as is suspected for the ring nebula ejected by the B supergiant progenitor of SN 1987A, Sk--69° 202. Sher 25 has an inferred age of ˜5 Myr in contrast with ˜2 Myr for HD 97950, the ionizing cluster of NGC 3603, so it may be a foreground object or close binary evolution may be responsible for its unusual location in the H-R diagram.

Crowther, P. A.; Lennon, D. J.; Walborn, N. R.; Smartt, S. J.

2008-06-01

159

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

160

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

161

Galactic Bulge Deep Survey  

NASA Astrophysics Data System (ADS)

We propose a deep survey in the second lowest extinction (after Baades Window) region in the galactic bulge, the window identified by Stanek (1998) at l,b ~ 0.25, -2.1. This will complement our deep survey of Baades Window scheduled for cycle 4 and allow comparative source populations, and constraints on the gradient towards the galactic center, to be derived. HST orbits (9) are requested to do the optical identifications in this field down to Mv ~9, sufficient to identify most CVs and qLMXBs. This will constrain the compact object populations in the galactic bulge.

Grindlay, Jonathan

2003-09-01

162

Galactic Bulge Deep Survey  

NASA Astrophysics Data System (ADS)

We propose a deep survey in the second lowest extinction {after Baade's Window} region in the galactic bulge, the window identified by Stanek {1998} at l, b 0.25, -2.1. This will complement our deep HST/Chandra survey of Baade's Window carried out in July 2003 and allow comparative source populations, and constraints on the gradient towards the galactic center, to be derived. Nine HST orbits are requested to do the optical identifications in this field down to Mv 9, sufficient to identify most CVs and qLMXBs. This will constrain the compact object populations in the galactic bulge.

Grindlay, Jonathan

2003-07-01

163

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

164

4. EXTERIOR DETAIL OF FRONT PORCH SHOWING ASBESTOS SIDING, SOFFITED ...  

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

4. EXTERIOR DETAIL OF FRONT PORCH SHOWING ASBESTOS SIDING, SOFFITED BOXED CORNICE, SQUARE POST PORCH SUPPORT, AND STICK BALASTRADE WITH CRIS-CROSSED MEMBERS. VIEW TO NORTH. - Bishop Creek Hydroelectric System, Plant 4, Worker Cottage, Bishop Creek, Bishop, Inyo County, CA

165

5. HOUSE NORTH END EXTERIOR SHOWING ASBESTOS SIDING, CONCRETE WALKWAY ...  

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

5. HOUSE NORTH END EXTERIOR SHOWING ASBESTOS SIDING, CONCRETE WALKWAY TO REAR OF HOUSE, CLOSELINE SUPPORT AT EXTREME PHOTO RIGHT, AND CASEMENT WINDOW TO ATTIC JUST BELOW THE GABLE PEAK. VIEW TO SOUTHWEST. - Big Creek Hydroelectric System, Big Creek Town, Operator House, Orchard Avenue south of Huntington Lake Road, Big Creek, Fresno County, CA

166

GARAGE EXTERIOR EAST SIDE AND REAR SHOWING PIER SUPPORTS UNDER ...  

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

GARAGE EXTERIOR EAST SIDE AND REAR SHOWING PIER SUPPORTS UNDER SHED-ROOFED REAR STORAGE COMPARTMENT, ASBESTOS SIDING OVER ORIGINAL WOOD SIDING, AND SINGLE CASEMENT WINDOW OVER REAR STORAGE COMPARTMENT. VIEW TO NORTHWEST - Big Creek Hydroelectric System, Big Creek Town, Operator House Garage, Orchard Avenue south of Huntington Lake Road, Big Creek, Fresno County, CA

167

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

168

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

169

3. Photocopy: CA. 1880 LITHOGRAPH SHOWING EXTERIOR VIEW OF CHURCH, ...  

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

3. Photocopy: CA. 1880 LITHOGRAPH SHOWING EXTERIOR VIEW OF CHURCH, from the collection of American Catholic Historical Society. Please use the following credit line: American Catholic Historic Society Ryan Memorial Library Historical Collections St. Charles Seminary Overbrook Philadelphia, Pa. 19151 - Church of St. Philip de Neri (Roman Catholic), 220-228 Queen Street, Philadelphia, Philadelphia County, PA

170

1. Photocopy: CA. 1880 LITHOGRAPH SHOWING EXTERIOR VIEW OF CHURCH, ...  

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

1. Photocopy: CA. 1880 LITHOGRAPH SHOWING EXTERIOR VIEW OF CHURCH, from the collection of American Catholic Historical Society. Please use the following credit line: American Catholic Historical Society Ryan Memorial Library Historical Collections St. Charles Seminary Overbrook, Philadelphia, Pa. 19151 - Church of the Immaculate Conception, 1020 North Front Street, Philadelphia, Philadelphia County, PA

171

5. EXTERIOR SOUTHEAST CORNER VIEW, FACING NORTHWEST. EXTENSIONS TO BUILDING ...  

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

5. EXTERIOR SOUTHEAST CORNER VIEW, FACING NORTHWEST. EXTENSIONS TO BUILDING 13 CLEARLY VISIBLE. ROM LEFT TO RIGHT, FORMER BUILDING 13, ADDITION WITH LARGE ROLL-UP DOOR, CANOPY 723. BUILDING 42 VISIBLE IN PERSPECTIVE LINE. - NASA Industrial Plant, Maintenance Facility, 12214 Lakewood Boulevard, Downey, Los Angeles County, CA

172

Exterior oblique view of the east side of Building 7 ...  

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

Exterior oblique view of the east side of Building 7 from the 3rd floor balcony of Building 6, looking southwest - North Beach Place, 431 Bay Street, 530 Francisco Street, 431 Bay Street, 530 Francisco Street, San Francisco, San Francisco County, CA

173

Exterior oblique view of west side of Building 11, from ...  

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

Exterior oblique view of west side of Building 11, from 3rd floor balcony at north end of Building 10, looking southwest - North Beach Place, 531 Bay Street, 650 Francisco Street, 531 Bay Street, 650 Francisco Street, San Francisco, San Francisco County, CA

174

EXTERIOR VIEW, NO. 3 CAST HOUSE CENTER AND BLAST FURNACE ...  

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

EXTERIOR VIEW, NO. 3 CAST HOUSE CENTER AND BLAST FURNACE NO. 3 (JANE FURNACE)/ORE BRIDGE TO THE RIGHT, WITH SINTERING PLANT CONVEYORS & TRANSFER HOUSE IN FOREGROUND. - Pittsburgh Steel Company, Monessen Works, Blast Furnace No. 3, Donner Avenue, Monessen, Westmoreland County, PA

175

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

176

EXTERIOR, A view looking northwest captures the south side of ...  

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

EXTERIOR, A view looking northwest captures the south side of the building. The grassy knoll in the left foreground was where an explosives bunker was located before its demolition - Department of Energy, Mound Facility, Isolated Building (I Building), One Mound Road, Miamisburg, Montgomery County, OH

177

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

178

Exterior view along the west side, showing the alternating wood ...  

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

Exterior view along the west side, showing the alternating wood and steel ceiling beams and metal sash windows, view facing northeast - U.S. Marine Corps Base Hawaii, Kaneohe Bay, Warehouse 250, Aviation Storehouse, C Street between Fifth & Sixth Streets, Kaneohe, Honolulu County, HI

179

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

180

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

181

14. DETAIL EXTERIOR VIEW LOOKING NORTHWEST, SHOWING CONTROL HOUSE AT ...  

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

14. DETAIL EXTERIOR VIEW LOOKING NORTHWEST, SHOWING CONTROL HOUSE AT UPSTREAM END OF NAVIGATION LOCK #1; POWERHOUSE #1 IS PARTIALLY VISIBLE IN BACKGROUND. - Bonneville Project, Navigation Lock No. 1, Oregon shore of Columbia River near first Powerhouse, Bonneville, Multnomah County, OR

182

10. DETAIL EXTERIOR VIEW LOOKING NORTHWEST, SHOWING REAR SIDE OF ...  

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

10. DETAIL EXTERIOR VIEW LOOKING NORTHWEST, SHOWING REAR SIDE OF REINFORCED CONCRETE GUIDEWALL BUILT ON THE SOUTH SIDE OF THE CHANNEL DOWNSTREAM FROM NAVIGATION LOCK #1. MASONRY RIPRAP ON NORTH SIDE OF CHANNEL IS VISIBLE IN THE CENTER/RIGHT BACKGROUND. - Bonneville Project, Navigation Lock No. 1, Oregon shore of Columbia River near first Powerhouse, Bonneville, Multnomah County, OR

183

1. GENERAL EXTERIOR VIEW LOOKING SOUTHWEST, SHOWING DOWNSTREAM END OF ...  

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

1. GENERAL EXTERIOR VIEW LOOKING SOUTHWEST, SHOWING DOWNSTREAM END OF NAVIGATION LOCK #1 WITH CHAMBER FILLED; THE CONTROL HOUSE IS ON RIGHT; VIEW IS TAKEN FROM ROOF OF POWERHOUSE #1. - Bonneville Project, Navigation Lock No. 1, Oregon shore of Columbia River near first Powerhouse, Bonneville, Multnomah County, OR

184

11. DETAIL EXTERIOR VIEW OF EQUIPMENT AND FISH LIFTS BETWEEN ...  

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

11. DETAIL EXTERIOR VIEW OF EQUIPMENT AND FISH LIFTS BETWEEN POWERHOUSE #1 AND NAVIGATION LOCK #1; VIEW IS TAKEN FROM ROOF OF POWERHOUSE #1. - Bonneville Project, Navigation Lock No. 1, Oregon shore of Columbia River near first Powerhouse, Bonneville, Multnomah County, OR

185

3. GENERAL EXTERIOR VIEW LOOKING NORTHWEST, SHOWING BARGE AFTER EXITING ...  

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

3. GENERAL EXTERIOR VIEW LOOKING NORTHWEST, SHOWING BARGE AFTER EXITING FROM DOWNSTREAM END OF NAVIGATION LOCK #1; SWING BRIDGE IS IN PROCESS OF CLOSING. - Bonneville Project, Navigation Lock No. 1, Oregon shore of Columbia River near first Powerhouse, Bonneville, Multnomah County, OR

186

13. DETAIL EXTERIOR VIEW LOOKING NORTH, SHOWING TOP OF MITER ...  

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

13. DETAIL EXTERIOR VIEW LOOKING NORTH, SHOWING TOP OF MITER GATES AT DOWNSTREAM END OF NAVIGATION LOCK #1; POWERHOUSE #1 IS VISIBLE IN BACKGROUND. - Bonneville Project, Navigation Lock No. 1, Oregon shore of Columbia River near first Powerhouse, Bonneville, Multnomah County, OR

187

8. GENERAL EXTERIOR VIEW LOOKING NORTHWEST TOWARD UPSTREAM END OF ...  

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

8. GENERAL EXTERIOR VIEW LOOKING NORTHWEST TOWARD UPSTREAM END OF NAVIGATION LOCK #1; SOUTH END OF POWERHOUSE #1 IS VISIBLE ON RIGHT; BRADFORD SLOUGH IS VISIBLE IN FOREGROUND. - Bonneville Project, Navigation Lock No. 1, Oregon shore of Columbia River near first Powerhouse, Bonneville, Multnomah County, OR

188

6. GENERAL EXTERIOR VIEW LOOKING SOUTHEAST, SHOWING NAVIGATION LOCK #1 ...  

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

6. GENERAL EXTERIOR VIEW LOOKING SOUTHEAST, SHOWING NAVIGATION LOCK #1 FILLED WITH WATER; PHOTO IS TAKEN FROM TOP OF MITER GATES AT DOWNSTREAM END OF LOCK. - Bonneville Project, Navigation Lock No. 1, Oregon shore of Columbia River near first Powerhouse, Bonneville, Multnomah County, OR

189

5. GENERAL EXTERIOR VIEW LOOKING EAST, SHOWING EMPTY NAVIGATION LOCK ...  

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

5. GENERAL EXTERIOR VIEW LOOKING EAST, SHOWING EMPTY NAVIGATION LOCK #1 WITH DOWNSTREAM MITER GATES OPEN; PHOTO TAKEN FROM MIDDLE OF SWING BRIDGE DOWNSTREAM FROM LOCK. - Bonneville Project, Navigation Lock No. 1, Oregon shore of Columbia River near first Powerhouse, Bonneville, Multnomah County, OR

190

2. Historic American Buildings Survey Photographer unknown, c. 1938 EXTERIOR ...  

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

2. Historic American Buildings Survey Photographer unknown, c. 1938 EXTERIOR FROM SOUTH Copied from print in files of National Capital Region, National Park Service, Washington, D. C. - Godey Lime Kilns (Ruins), Junction of Rock Creek & Potomac Parkway, Washington, District of Columbia, DC

191

1. Historic American Buildings Survey Photographer Unknown, post 1907. EXTERIOR ...  

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

1. Historic American Buildings Survey Photographer Unknown, post 1907. EXTERIOR FROM WEST Copied from print in files of National Capital Region, National Park Service, Washington, D. C. - Godey Lime Kilns (Ruins), Junction of Rock Creek & Potomac Parkway, Washington, District of Columbia, DC

192

EXTERIOR PERSPECTIVE OF GRANARY SHOWING ADDITION, LOOKING NORTH. (When the ...  

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

EXTERIOR PERSPECTIVE OF GRANARY SHOWING ADDITION, LOOKING NORTH. (When the granary was adapted into a family home, an addition was added onto the west façade. The Gould house is visible in the distance, at the left.) - Smith Farm, Granary, 399 Ebey Road, Coupeville, Island County, WA

193

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

194

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

195

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

196

Exterior building details of Building A; west façade: exposed common ...  

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

Exterior building details of Building A; west façade: exposed common bond brick wall, arched brick lintels over a two single-light casement window with brick sills, arched brick lintel over door cornice; easterly view - San Quentin State Prison, Building 22, Point San Quentin, San Quentin, Marin County, CA

197

2. EXTERIOR, CORNER VIEW OF (LEFT TO RIGHT) NIELSEN, GEHRKE ...  

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

2. EXTERIOR, CORNER VIEW OF (LEFT TO RIGHT) NIELSEN, GEHRKE AND HANSEN CLOTHING STORE (NORTH FRONT AND EAST SIDE), GARTON BAKERY AND CONFECTIONERY (NORTH FRONT) AND C.F. WHEELER BAKERY (NORTH FRONT) - East Locust Street Commercial District, 521-529 East Locust Street, Des Moines, Polk County, IA

198

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

199

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

200

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

201

Non-Solvent, General Use Exterior Aircraft Cleaner.  

National Technical Information Service (NTIS)

The present invention relates to a cleaning composition having utility in cleaning aircraft exterior surfaces. The cleaning composition comprises from about 15% to about 40% of a mixture of linear alcohol ethoxylates having a HLB in the range of about 5.0...

P. Bevilacqua K. G. Clark D. L. Gauntt

1999-01-01

202

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

203

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

204

Identification of convective heat loss on exterior cavity wall assemblies  

Microsoft Academic Search

Most present day low and medium rise buildings constructed in Canada use some form of cavity wall design for their exterior walls. These types of wall assemblies use a broad range of cladding materials such as brick, stone, wood, sheet metal, porcelain enamel or metal panels, cementitious materials and plastics. The interior assemblies of these walls include the air barrier,

Antonio Colantonio

1999-01-01

205

27. EXTERIOR CAN CONVEYOR TRACKS On the left are ...  

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

27. EXTERIOR - CAN CONVEYOR TRACKS On the left are the collapsing remnants of the empty can conveyor track whose terminus was in the room in Photo No. 26. Note glassless skylights and deteriorating roof. - Hovden Cannery, 886 Cannery Row, Monterey, Monterey County, CA

206

1. EXTERIOR OVERVIEW OF NORTH END OF RUSH CREEK POWERHOUSE ...  

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

1. EXTERIOR OVERVIEW OF NORTH END OF RUSH CREEK POWERHOUSE RESIDENTIAL COMPLEX SHOWING BUILDING 108 AT PHOTO RIGHT AND BUILDING 105 AT PHOTO CENTER BEHIND SWITCHRACKS AND TREE. POWERHOUSE IS AT EXTREME PHOTO LEFT. VIEW TO WEST. - Rush Creek Hydroelectric System, Worker Cottage, Rush Creek, June Lake, Mono County, CA

207

1. EXTERIOR OVERVIEW SHOWING BISHOP CREEK PLANT 4 RESIDENTIAL COMPLEX. ...  

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

1. EXTERIOR OVERVIEW SHOWING BISHOP CREEK PLANT 4 RESIDENTIAL COMPLEX. BUILDING 122 IS VISIBLE AT PHOTO CENTER. PLANT 5 INTAKE DAM AT PHOTO LEFT. VIEW TO WEST. - Bishop Creek Hydroelectric System, Plant 4, Worker Cottage, Bishop Creek, Bishop, Inyo County, CA

208

1. EXTERIOR OVERVIEW OF NORTH END OF RUSH CREEK POWERHOUSE ...  

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

1. EXTERIOR OVERVIEW OF NORTH END OF RUSH CREEK POWERHOUSE RESIDENTIAL COMPLEX SHOWING BUILDING 108 AT PHOTO RIGHT AND BUILDING 105 AT PHOTO CENTER BEHIND TREE. RUSH CREEK POWERHOUSE IS PARTIALLY VISIBLE AT EXTREME PHOTO LEFT). VIEW TO WEST. - Rush Creek Hydroelectric System, Clubhouse Cottage, Rush Creek, June Lake, Mono County, CA

209

1. EXTERIOR OVERVIEW OF SOUTH END OF RUSH CREEK POWERHOUSE ...  

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

1. EXTERIOR OVERVIEW OF SOUTH END OF RUSH CREEK POWERHOUSE RESIDENTIAL COMPLEX SHOWING THE RUSH CREEK POWERHOUSE AT PHOTO RIGHT (TAILRACE IN FOREGROUND), BUILDING 106 NEXT TO THE POWERHOUSE AT PHOTO LEFT CENTER, AND BUILDING 103 AT UPPER PHOTO LEFT ABOVE AND BEHIND BUILDING 106. VIEW TO SOUTH. - Rush Creek Hydroelectric System, Worker Cottage, Rush Creek, June Lake, Mono County, CA

210

1. EXTERIOR OVERVIEW SHOWING BISHOP CREEK PLANT 4 RESIDENTIAL COMPLEX. ...  

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

1. EXTERIOR OVERVIEW SHOWING BISHOP CREEK PLANT 4 RESIDENTIAL COMPLEX. ROOF OF BUILDING 105 IS VISIBLE IN UPPER PHOTO CENTER. PLANT 5 INTAKE DAM AT PHOTO LEFT. VIEW TO WEST. - Bishop Creek Hydroelectric System, Plant 4, Worker Cottage, Bishop Creek, Bishop, Inyo County, CA

211

1. EXTERIOR OVERVIEW SHOWING BISHOP CREEK PLANT 4 RESIDENTIAL COMPLEX. ...  

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

1. EXTERIOR OVERVIEW SHOWING BISHOP CREEK PLANT 4 RESIDENTIAL COMPLEX. BUILDING 113 IS VISIBLE AT RIGHT PHOTO CENTER. PLANT 5 INTAKE DAM AT PHOTO LEFT. VIEW TO WEST. - Bishop Creek Hydroelectric System, Plant 4, Worker Cottage, Bishop Creek, Bishop, Inyo County, CA

212

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

213

GOES 9 Spacecraft at Astrotech Plus Exterior and Logo  

NASA Technical Reports Server (NTRS)

This Kennedy Space Center video presents live footage of the GOES (Geostationary Operational Environmental Satellite) at Astrotech with views of its exterior and the Space Systems Loral logo. The GOES mission is to provide weather imagery and quantitative sounding data for weather forecasting and related services.

1995-01-01

214

2. VIEW OF STATION FARLEY FACING NORTH SHOWING EXPOSED EXTERIOR ...  

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

2. VIEW OF STATION FARLEY FACING NORTH SHOWING EXPOSED EXTERIOR FRONT OF THE CONCRETE CONCEALMENT, SANDSTONE FLANK-WALLS ARE VISIBLE AT REAR SIDES. - White's Point Reservation, Base End Stations, B"6, Bounded by Voyager Circle & Mariner Drive, San Pedro, Los Angeles County, CA

215

5. EXTERIOR OF SOUTH SIDE SHOWING ELECTRICAL JUNCTION BOX NEXT ...  

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

5. EXTERIOR OF SOUTH SIDE SHOWING ELECTRICAL JUNCTION BOX NEXT TO SOUTH SIDE DOOR AND CHAIN-LINK FENCE AROUND GARDEN AREA AT REAR OF HOUSE. VIEW TO NORTHWEST. - Bishop Creek Hydroelectric System, Plant 4, Worker Cottage, Bishop Creek, Bishop, Inyo County, CA

216

EXTERIOR VIEW, LOOKING WEST FROM UNIVERSITY PARK ALONG THE WARRIOR ...  

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

EXTERIOR VIEW, LOOKING WEST FROM UNIVERSITY PARK ALONG THE WARRIOR RIVER TOWARDS THE BRIDGES LINKING TUSCALOOSA AND NORTHPORT, SHOWING THE GATE OF INDENTATION OF THE SOUTH LOCK WALL OF LOCK NO. 3, ONE OF THE ORIGINAL 19 WARRIOR RIVER LOCKS. - Warrior River, Lock No. 3 Wall, River Road at University Park, Tuscaloosa, Tuscaloosa County, AL

217

General exterior view showing remnants of loading dock at three ...  

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

General exterior view showing remnants of loading dock at three main doors, view to north - Charlestown Navy Yard, Oxygen Plant, Midway along northern boundary of Charlestown Navy Yard, on Little Mystic Channel, near junction of Eighteenth Street & Fourth Avenue, Boston, Suffolk County, MA

218

11. BALD MOUNTAIN MILL, EXTERIOR FROM NORTHEAST, c. 194059. ROASTER ...  

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

11. BALD MOUNTAIN MILL, EXTERIOR FROM NORTHEAST, c. 1940-59. ROASTER AND OTHER UNOXIDIZED ORE CIRCUIT ADDITIONS PRESENT, ALONG WITH SECONDARY THICKENER No. 7 AND ADDITIONS TO MACHINE SHOP. CREDIT JW. - Bald Mountain Gold Mill, Nevada Gulch at head of False Bottom Creek, Lead, Lawrence County, SD

219

EXTERIOR, A view looking northwest capturing disposal containers in the ...  

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

EXTERIOR, A view looking northwest capturing disposal containers in the foreground. Also shown on the left side of the roof is the ventilation equipment used for the original clean room and on the right side the penthouse on the press building addition can be seen - Department of Energy, Mound Facility, Isolated Building (I Building), One Mound Road, Miamisburg, Montgomery County, OH

220

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

221

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

222

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

223

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

224

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

225

Exterior oblique view of northeast and southeast sides with heavy ...  

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

Exterior oblique view of northeast and southeast sides with heavy weight sliding doors, louvered entry door, view facing west - U.S. Naval Base, Pearl Harbor, Industrial X-Ray Building, Off Sixth Street, adjacent to and south of Facility No. 11, Pearl City, Honolulu County, HI

226

View of north side from exterior stairs of adjacent building, ...  

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

View of north side from exterior stairs of adjacent building, bottom cut off by fringed buildings, view facing south-southwest - U.S. Naval Base, Pearl Harbor, Industrial X-Ray Building, Off Sixth Street, adjacent to and south of Facility No. 11, Pearl City, Honolulu County, HI

227

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

228

29. EXTERIOR VIEW OF FOREBAY SIDE. NOTE COMPLETION OF WOODEN ...  

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

29. EXTERIOR VIEW OF FOREBAY SIDE. NOTE COMPLETION OF WOODEN SOUTH WALL WHICH FACILITATED EASY GENERATOR MOVEMENT IN AND OUT OF BUILDING. ALSO NOTE ELECTRIC TURBINE PIT GATE HOISTING MACHINE, c. 1918. - Dam No. 5 Hydroelectric Plant, On Potomac River, Hedgesville, Berkeley County, WV

229

26. GENERAL EXTERIOR VIEW LOOKING EAST, SHOWING FISH LADDER ON ...  

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

26. GENERAL EXTERIOR VIEW LOOKING EAST, SHOWING FISH LADDER ON WASHINGTON SHORE ADJACENT TO UPSTREAM FACE OF THE DAM/SPILLWAY. Photograph Nos. OR-11-F-27 through OR-11-F-94 are photocopies of photographs. Original historic photographs are located at the Bonneville Powerhouse, Bonneville, Oregon. - Bonneville Project, Bonneville Dam, Columbia River, Bonneville, Multnomah County, OR

230

2. EXTERIOR BACK (NORTHEAST) SIDE OF BUILDING 102. BISHOP CREEK ...  

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

2. EXTERIOR BACK (NORTHEAST) SIDE OF BUILDING 102. BISHOP CREEK TRANSMISSION LINES PASS DIRECTLY OVERHEAD. 1953 FLAT-ROOFED ADDITION CONSTITUTES CORNER OF THE HOUSE IN THE FOREGROUND. VIEW TO SOUTHWEST. - Bishop Creek Hydroelectric System, Plant 6, Cashbaugh-Kilpatrick House, Bishop Creek, Bishop, Inyo County, CA

231

Regular solutions to a supercritical elliptic problem in exterior domains  

NASA Astrophysics Data System (ADS)

We consider the supercritical elliptic problem -?u=?eu, ?>0, in an exterior domain ?=RN?D under zero Dirichlet condition, where D is smooth and bounded in RN, N?3. We prove that, for ? small, this problem admits infinitely many regular solutions.

Dávila, Juan; López, Luis F.

232

1. EXTERIOR VIEW OF BOILER HOUSE FROM SOUTHWEST. THE BOILER ...  

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

1. EXTERIOR VIEW OF BOILER HOUSE FROM SOUTHWEST. THE BOILER HOUSE WAS USED FOR HEATING THE MILL; HYDRO-ELECTRIC POWER FOR PRODUCTION WAS PURCHASED FROM THE COLUMBUS LIGHT & POWER COMPANY. NORTH END OF 1924 MILL TO RIGHT, c. 1970 WINDOWLESS WEAVE ROOM ADDITION TO LEFT. - Stark Mill, Boiler House, 117 Corinth Road, Hogansville, Troup County, GA

233

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

234

4. EXTERIOR NORTH SIDE OF BUILDING 102 SHOWING USHAPED SPACE ...  

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

4. EXTERIOR NORTH SIDE OF BUILDING 102 SHOWING U-SHAPED SPACE BETWEEN KITCHEN NOS. 1 AND 2, SHED-ROOFED EXTENSION TO UTILITY ROOM CONTAINING HOT WATER HEATER, AND ASBESTOS SIDING. VIEW TO SOUTHWEST. - Bishop Creek Hydroelectric System, Plant 6, Cashbaugh-Kilpatrick House, Bishop Creek, Bishop, Inyo County, CA

235

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

236

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

237

Exterior oblique view of trash chute, balconies, and unit entrances ...  

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

Exterior oblique view of trash chute, balconies, and unit entrances on west side of Building 10, from courtyard, looking southeast - North Beach Place, 501 Bay Street, 600 Francisco Street, 501 Bay Street, 600 Francisco Street, San Francisco, San Francisco County, CA

238

Exterior direct detail view of revised entry handicap ramp at ...  

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

Exterior direct detail view of revised entry handicap ramp at east side of Building 7 (including 3-story trash dump tower), looking north - North Beach Place, 431 Bay Street, 530 Francisco Street, 431 Bay Street, 530 Francisco Street, San Francisco, San Francisco County, CA

239

Exterior direct view of north side of stair no. 3 ...  

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

Exterior direct view of north side of stair no. 3 (showing half-round 3-story trash dump tower) from balcony of Building 3, looking east - North Beach Place, Bounded by Bay Street, Mason Street, Francisco Street, & Columbus Avenue, San Francisco, San Francisco County, CA

240

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

241

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

242

Exterior oblique view of east end and south side, Facility ...  

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

Exterior oblique view of east end and south side, Facility No. 47 to the left and Avenue G in foreground - U.S. Naval Base, Pearl Harbor, Casualty Station Type A, Corner of Avenue G & Sixth Street, near Dry Dock No. 1, Pearl City, Honolulu County, HI

243

ARCHITECTURAL EXTERIOR ELEVATIONS AND DETAILS, WELLTONMOHAWK PUMPING PLANT NO. 1. ...  

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

ARCHITECTURAL EXTERIOR ELEVATIONS AND DETAILS, WELLTON-MOHAWK PUMPING PLANT NO. 1. United States Department of the Interior, Bureau of Reclamation; Gila Project, Arizona, Wellton-Mohawk Division. Drawing No. 50-D-2359, dated November 24, 1948, Denver, Colorado. - Wellton-Mohawk Irrigation System, Pumping Plant No. 1, Bounded by Gila River & Union Pacific Railroad, Wellton, Yuma County, AZ

244

ARCHITECTURAL EXTERIOR ELEVATIONS AND DETAILS. WELLTONMOHAWK PUMPING PLANT NO. 3. ...  

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

ARCHITECTURAL EXTERIOR ELEVATIONS AND DETAILS. WELLTON-MOHAWK PUMPING PLANT NO. 3. United States Department of the Interior, Bureau of Reclamation; Gila Project, Arizona, Wellton-Mohawk Division. Drawing No. 50-D-2361, dated November 24, 1948, Denver, Colorado - Wellton-Mohawk Irrigation System, Pumping Plant No. 3, South of Interstate 8, Wellton, Yuma County, AZ

245

ARCHITECTURAL EXTERIOR ELEVATIONS AND DETAILS. WELLTONMOHAWK PUMPING PLANT NO. 2. ...  

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

ARCHITECTURAL EXTERIOR ELEVATIONS AND DETAILS. WELLTON-MOHAWK PUMPING PLANT NO. 2. United States Department of the Interior, Bureau of Reclamation; Gila Project, Arizona, Wellton-Mohawk Division. Drawing No. 50-D-2360, dated Novermber 24, 1948, Denver Colorado - Wellton-Mohawk Irrigation System, Pumping Plant No. 2, Bounded by Interstate 8 to south, Wellton, Yuma County, AZ

246

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

247

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

248

Tire Noise Reduction with Fiber Exterior Wheel Arch Liners  

Microsoft Academic Search

Tire noise reduction was evaluated with acoustically designed exterior wheel arch liners. The wheel liners were made with a fiber blend selected to meet acoustical requirements, process demands, and durability challenges. Fiber liners were installed in a vehicle and noise level measurements were made under a range of operating conditions. The results show the reduction in tire noise that can

Barry R. Wyerman; Gabriella Cerrato Jay

249

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

250

Armendariz rings and gaussian rings  

Microsoft Academic Search

We prove a number of results concerning Armendariz rings and Gaussian rings. Recall that a (commutative) ring R is (Gaussian) Armendariz if for two polynomials f,g?R[X] (the ideal of R generated by the coefficients of f g is the product of the ideals generated by the coefficients of f and g) fg = 0 implies aibj=0 for each coefficient ai

D. D. Anderson; Victor Camillo

1998-01-01

251

Fermi Galactic Center Zoom  

NASA Video Gallery

This animation zooms into an image of the Milky Way, shown in visible light, and superimposes a gamma-ray map of the galactic center from NASA's Fermi. Raw data transitions to a view with all known...

252

Differential Galactic Rotation  

NSDL National Science Digital Library

The EJS Differential Galactic Rotation Model illustrates the model of galactic rotation proposed by Jan Oort in 1927. In Oort's model most of the mass of the galaxy is concentrated at the center. Stars move in circular orbits around the center, with orbital speeds that are inversely proportional to the square root of their distance from the center. Oort realized that this model produced a specific pattern of radial velocities in the stars near the sun, and that this pattern matched the observational data fairly well. The simulation is intended to illustrate both Oort's model and the resulting pattern in the radial velocities. The simulation can also depict the so-called "high-velocity" stars, which are stars that have very low orbital speeds (treated as zero in the simulation) around the galactic center and therefore have high speeds relative to the sun. One window depicts stars (including the sun) orbiting counterclockwise around the galactic center as seen from above the galactic North pole. The velocity vectors of the stars can be displayed, and stars near the sun can be highlighted. Another window shows the highlighted stars (and, optionally, the high-velocity stars) in the region near the sun. The radial velocity and relative velocity vectors for these stars can be displayed. Finally, a plot of radial velocity versus galactic longitude (using either the modern longitude system in which the galactic center is at longitude 0, or the pre-1958 system with the galactic center at longitude 325 degrees) can be shown. The plot can display data for the highlighted stars, the high-velocity stars, and two sets of Cepheid variables studied by Alfred Joy in 1939. Using the Cepheid period-luminosity relation Joy found distances to these stars that fit with the distances derived from Oort's rotational model, provided that the apparent magnitudes of the stars were corrected for interstellar absorption.

Timberlake, Todd

2011-05-28

253

Additional Exterior Insulation of a Block of Flats. Building Methods, Costs, and Energy Saving.  

National Technical Information Service (NTIS)

The present report describes a project which has for its purpose to examine the possibilities of providing an existing block of flats with exterior additional insulation. The first part of the report deals with exterior additional insulation generally. It...

M. Noerregaard H. Blad G. Christensen

1981-01-01

254

GalactICS: Galaxy Model Building Package  

NASA Astrophysics Data System (ADS)

GalactICS generates N-body realizations of axisymmetric galaxy models consisting of disk, bulge and halo. Some of the code is in Fortran 77, using lines longer than 72 characters in some cases. The -e flag in the makefile allow for this for a Solaris f77 compiler. Other programs are written in C. Again, the linking between these routines works on Solaris systems, but may need to be adjusted for other architectures. We have found that linking using f77 instead of ld will often automatically load the appropriate libraries. The graphics output by some of the programs (dbh, plotforce, diskdf, plothalo) uses the PGPLOT library. Alternatively, remove all calls to routines with names starting with "PG", as well as the -lpgplot flag in the Makefile, and the programs should still run fine.

Kuijken, Konrad; Dubinski, John

2011-09-01

255

A TRANSMISSION PROBLEM FOR FLUID-STRUCTURE INTERACTION IN THE EXTERIOR OF A THIN DOMAIN  

Microsoft Academic Search

We study the behavior of weak solutions to a time-harmonic fluid-structure interaction problem in the exterior of a thin elastic domain, in the limit of vanishing thickness. Boundary integral operators are used to reduce the exterior problem. Formal asymptotic expansions are developed and justified. The asymptotic procedure is simple, and involves the solution of a reduced exterior problem. Exact representation

G. C. HSIAO

256

The Formation of Nuclear Rings in Barred Spiral Galaxies  

Microsoft Academic Search

Although nuclear rings of gas and star formation are common in barred spiral galaxies, current theories of why and how they form do not provide the level of detail needed to quantify the effect that these rings can have on the fueling of active galactic nuclei and on the evolution of their host galaxy. In this paper we use detailed

Michael W. Regan; Peter J. Teuben

2003-01-01

257

The SIRTF Galactic Plane Survey  

NASA Astrophysics Data System (ADS)

We propose to image the inner galaxy from 10 to 70 degrees on either side of the Galactic center and one degree above and below the plane (240 square degrees) in all IRAC and MIPS bands. The survey will be fully sampled in all bands except at 160 µm. It will reach the three natural sensitivity limits: the saturation limit at wavelengths 70 µm and longer; the background limit at 24 µm; and, the confusion limit in the IRAC bands. This survey will be as good as can be obtained with SIRTF or any other telescope regardless of the integration time or observing strategy. It will require less than 20% of the time set aside for SIRTF Legacy programs. This SIRTF survey will: 1) produce a complete census of star formation in the inner galaxy; 2) measure the stellar disk scale length; 3) delineate the stellar structure of the molecular ring, inner spiral arms and bar as traced by the distributions of stars and star formation regions; 4) determine the luminosity and initial mass functions of all nearby star formation regions and clusters down to the stellar limit; 5) detect all young O and B stars still embedded in their natal clouds; 6) detect and identify young stellar objects (surrounded by circumstellar disks) in nearby star forming regions; 7) determine the interstellar extinction law in dense regions for the first time; 8) investigate the nature of Photo Dissociation Regions and the density structure within the interstellar medium; and, 9) detect a host of other types of stars and nebulae such as supernovae, planetary nebulae, hidden galaxies, OH/IR stars, etc. that will be of interest to a large fraction of the community. An additional value of a large, unbiased Galactic plane survey is its potential for new discoveries that might otherwise be missed by piecemeal imaging of selected regions.

Churchwell, Ed; Watson, Christer; Bania, Thomas; Benjamin, Robert; Cassinelli, Joseph; Clemens, Daniel; Dickey, John; Jackson, James; Kobulnicky, Henry; Lazarian, Alexander; Mathis, John; Seager, Sara; Whitney, Barbara; Wolff, Mike; Wolfire, Mark

2004-09-01

258

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

259

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

260

Modeling of Exterior Rotor Permanent Magnet Machines with Concentrated Windings  

Microsoft Academic Search

In this thesis modeling, analysis, design and measurement of exterior rotor permanent magnet (PM) machines with concentrated windings are dealt with. Special attention is paid to slotting effect. The PM machine is integrated in flywheel and used for small-scale ship application. Analytical model and automated nonlinear transient finite-element-model (FEM) including rotor motion are developed. A new hybrid model combining analytical

H. Vu Xuan

2012-01-01

261

1. EXTERIOR OVERVIEW OF SOUTH END OF RUSH CREEK POWERHOUSE ...  

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

1. EXTERIOR OVERVIEW OF SOUTH END OF RUSH CREEK POWERHOUSE RESIDENTIAL COMPLEX SHOWING THE RUSH CREEK POWERHOUSE AT PHOTO RIGHT, BUILDING 106 NEXT TO THE POWERHOUSE AT PHOTO CENTER, BUILDING 103 AT UPPER PHOTO LEFT, AND BUILDING 104 ABOVE BUILDING 106 PARTIALLY OBSCURED BEHIND TREE AT UPPER PHOTO CENTER. VIEW TO SOUTH. - Rush Creek Hydroelectric System, Worker Cottage, Rush Creek, June Lake, Mono County, CA

262

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

263

EXTERIOR PERSPECTIVE OF CARRIAGE HOUSE SHOWING RELATIONSHIP TO MILK HOUSE, ...  

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

EXTERIOR PERSPECTIVE OF CARRIAGE HOUSE SHOWING RELATIONSHIP TO MILK HOUSE, LOOKING NORTHWEST. (The carriage house was built by William B. Engle at the end of the 19th century, with carriage storage on the ground floor and a workshop above. Later, his son, Ralph Engle, used the ground floor as a car garage.) - Engle Farm, Carriage House, 89 South Ebey Road, Coupeville, Island County, WA

264

6. HOUSE REAR EXTERIOR SHOWING UTILITY PORCH AND REAR ENTRANCE ...  

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

6. HOUSE REAR EXTERIOR SHOWING UTILITY PORCH AND REAR ENTRANCE TO DINNING/KITCHEN AREA AT PHOTO CENTER. SMALL RECTANGULAR STRUCTURE ATTACHED TO SIDE OF HOUSE AT PHOTO RIGHT CENTER BELOW SMALL, DOUBLEHUNG, WOOD-FRAME WINDOW IS THE HOT WATER HEATER CABINET. VIEW TO SOUTHEAST. - Big Creek Hydroelectric System, Big Creek Town, Operator House, Orchard Avenue south of Huntington Lake Road, Big Creek, Fresno County, CA

265

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

266

Covariant Star Product for Exterior Differential Forms on Symplectic Manifolds  

SciTech Connect

After a brief description of the 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 h, 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.

McCurdy, Shannon; Zumino, Bruno [Physics Department, University of California, Berkeley, CA 94720-7300 (United States); Theoretical Physics Group, Lawrence Berkeley Laboratory, Berkeley, CA 947208162 (United States)

2010-02-10

267

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

268

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

269

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.

270

The Galactic Habitable Zone  

ScienceCinema

We propose the concept of a "Galactic Habitable Zone" (GHZ). Similar to the circumstellar habitable zone (CHZ), the GHZ is that region in a spiral galaxy where life can exist. The width of the GHZ is controlled by two factors. The inner (closest to the center of the galaxy) limit is set by threats to complex life: nearby transient sources of ionizing radiation and comet impacts. Such threats tend to increase close to the galactic center. The outer limit is imposed by galactic chemical evolution, specifically the abundance of heavier elements. Observation of stars in the Milky Way galaxy suggests that the outer reaches of a spiral galaxy may be too poor in heavy elements to allow terrestrial complex life to exist.

271

Galactic UHE neutrons  

NASA Astrophysics Data System (ADS)

The AGASA and SUGAR data indicates on some anisotropy of cosmic rays from the Galactic Centre. This anisotropy can be due to secondary neutrons produced in the photo-production and photo-disintegration processes of nucleus interactions with background photons. The upper limit on the quantity of neutrons in the primary cosmic ray spectrum have been evaluated, on the base of measurements of anisotropy of high energy of cosmic rays. The trajectories of neutrons are straight line in Galaxy. The contribution of galactic UHE neutrons to the cosmic ray flux should provide some anisotropy. The coefficient of anisotropy has been evaluated as function energy for given percentage portion of neutrons in cosmic ray flux. The galactic model origin of cosmic ray is discussed. 1

Tkaczyk, W.

272

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

273

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

274

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

275

Galactic dynamics feeding the Galactic center  

NASA Astrophysics Data System (ADS)

We present the hierarchical structure of the gas and its rapid evolution in the central region of a simulation of the entire Milky Way, run at subparsec resolution. We emphasize the coupling between the kpc-scale dynamics, the molecular ring and the central 5 pc disk feeding the supermassive black hole.

Renaud, Florent; Emsellem, Eric; Bournaud, Frédéric

2014-05-01

276

Imaging Cold Dust in the Galactic Plane  

NASA Astrophysics Data System (ADS)

Images of continuum emission at wavelengths of 850 and 1200? m from a section of the Galactic Plane near longitude 44o are presented. These data were obtained with the JCMT and SEST bolometer array receivers with beamwidths of about 14 and 22 arcsec respectively, and cover a total area of 2 square degrees. They constitute the first extensive observations of emission primarily from cold dust in a representative part of the Galaxy outside the Galactic Center. We employed complementary techniques at the two telescopes - chop/scan using SCUBA at the JCMT, and Fastscanning (direct detection) with SIMBA at the SEST - which together allow us to assess the reality of emission features where necessary. Since interstellar dust is optically thin at mm/sub-mm wavelengths these observations provide a census of dense cold dust clumps throughout the Galaxy in this direction. Twenty-seven such objects are detected in the present survey, most of which can be identified with regions of star formation. In this paper we use complementary 13CO data from the BU-FCRAO Galactic Ring Survey to determine the kinematic distances of these sources, and compare these data with images obtained in the infrared by the MSX mission. These observations presage the potential of large-scale surveys with forthcoming instrumentation, such as SCUBA2 and HARP/ACSIS at the JCMT.

Matthews, H. E.; Weferling, B.; Evans, A.; Cohen, M.; Jackson, J.; Shah, R.; Simon, R.; Jenness, T.; Davis, G. R.; Pierce-Price, D.; Dent, W. R. F.; Johnstone, D.; Richer, J. S.; Fuller, G. A.; Rathborne, J.

2004-12-01

277

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

278

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

279

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

280

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

281

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

282

1. EXTERIOR VIEW OF MILL WORKER HOUSE AT 109 GREEN ...  

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

1. EXTERIOR VIEW OF MILL WORKER HOUSE AT 109 GREEN STREET. HOUSE IS 1 1/2 STORY WITH A CENTER CHIMNEY, KITCHEN ELL IN REAR, AND PORCH EXTENDING FROM THE FRONT. THIS DWELLING WAS CONSTRUCTED BY THE HOGANSVILLE MANUFACTURING COMPANY c. 1900. THE HOGANSVILLE 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. - 109 Green Street (House), 109 Green Street, Hogansville, Troup County, GA

283

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

284

Jupiter's Rings  

NASA Technical Reports Server (NTRS)

[figure removed for brevity, see original site] Annotated Version

The New Horizons Long Range Reconnaissance Imager (LORRI) snapped this photo of Jupiter's ring system on February 24, 2007, from a distance of 7.1 million kilometers (4.4 million miles).

This processed image shows a narrow ring, about 1,000 kilometers (600 miles) wide, with a fainter sheet of material inside it. The faint glow extending in from the ring is likely caused by fine dust that diffuses in toward Jupiter. This is the outer tip of the 'halo,' a cloud of dust that extends down to Jupiter's cloud tops. The dust will glow much brighter in pictures taken after New Horizons passes to the far side of Jupiter and looks back at the rings, which will then be sunlit from behind.

Jupiter's ring system was discovered in 1979, when astronomers spied it in a single image taken by the Voyager 1 spacecraft. Months later, Voyager 2 carried out more extensive imaging of the system. It has since been examined by NASA's Galileo and Cassini spacecraft, as well as by the Hubble Space Telescope and large ground-based observatories.

2007-01-01

285

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

286

Galactic-scale civilization  

NASA Technical Reports Server (NTRS)

Evolutionary arguments are presented in favor of the existence of civilization on a galactic scale. Patterns of physical, chemical, biological, social and cultural evolution leading to increasing levels of complexity are pointed out and explained thermodynamically in terms of the maximization of free energy dissipation in the environment of the organized system. The possibility of the evolution of a global and then a galactic human civilization is considered, and probabilities that the galaxy is presently in its colonization state and that life could have evolved to its present state on earth are discussed. Fermi's paradox of the absence of extraterrestrials in light of the probability of their existence is noted, and a variety of possible explanations is indicated. Finally, it is argued that although mankind may be the first occurrence of intelligence in the galaxy, it is unjustified to presume that this is so.

Kuiper, T. B. H.

1980-01-01

287

Ghostly Ring  

NASA Technical Reports Server (NTRS)

[figure removed for brevity, see original site] Click on image for poster version

This image shows a ghostly ring extending seven light-years across around the corpse of a massive star. The collapsed star, called a magnetar, is located at the exact center of this image. NASA's Spitzer Space Telescope imaged the mysterious ring around magnetar SGR 1900+14 in infrared light. The magnetar itself is not visible in this image, as it has not been detected at infrared wavelengths (it has been seen in X-ray light).

Magnetars are formed when a massive giant star ends its life in a supernova explosion, leaving behind a super dense neutron star with an incredibly strong magnetic field. The ring seen by Spitzer could not have formed during the original explosion, as any material as close to the star as the ring would have been disrupted by the supernova shock wave. Scientists suspect that the ring my actually be the edges of a bubble that was hollowed out by an explosive burst from the magnetar in 1998. The very bright region near the center of the image is a cluster of young stars, which may be illuminating the inner edge of the bubble, making it look like a ring in projection.

This composite image was taken using all three of Spitzer's science instruments. The blue color represents 8-micron infrared light taken by the infrared array camera, green is 16-micron light from the infrared spectograph, and red is 24-micron radiation from the multiband imaging photometer.

2008-01-01

288

Luminescent Rings  

NASA Technical Reports Server (NTRS)

This view shows the unlit face of Saturn's rings, visible via scattered and transmitted light. In these views, dark regions represent gaps and areas of higher particle densities, while brighter regions are filled with less dense concentrations of ring particles.

The dim right side of the image contains nearly the entire C ring. The brighter region in the middle is the inner B ring, while the darkest part represents the dense outer B Ring. The Cassini Division and the innermost part of the A ring are at the upper-left.

Saturn's shadow carves a dark triangle out of the lower right corner of this image.

The image was taken in visible light with the Cassini spacecraft wide-angle camera on June 8, 2005, at a distance of approximately 433,000 kilometers (269,000 miles) from Saturn. The image scale is 22 kilometers (14 miles) per pixel.

The Cassini-Huygens mission is a cooperative project of NASA, the European Space Agency and the Italian Space Agency. The Jet Propulsion Laboratory, a division of the California Institute of Technology in Pasadena, manages the mission for NASA's Science Mission Directorate, Washington, D.C. The Cassini orbiter and its two onboard cameras were designed, developed and assembled at JPL. The imaging operations center is based at the Space Science Institute in Boulder, Colo.

For more information about the Cassini-Huygens mission visit http://saturn.jpl.nasa.gov . The Cassini imaging team homepage is at http://ciclops.org .

2005-01-01

289

Resonance Rings  

NSDL National Science Digital Library

This is an activity about resonance and where it is found in related to astronomy. Learners will construct two differently sized rings out of file folder paper and tape them to a piece of cardboard. Next, they will shake the cardboard from side to side, which shakes the rings, and observe what happens when the frequency of the shaking is gradually increased. This activity is from the Stanford Solar Center's All About the Sun: Sun and Stars activity guide for Grades 5-8 and can also accompany the Stanford Solar Center's Build Your Own Spectroscope activity.

290

EXTERIORS AND INTERIORS OF THE SPACE POWER RESEARCH LABORATORY SPRL - ENERGY CONVERSION LABORATORY E  

NASA Technical Reports Server (NTRS)

EXTERIORS AND INTERIORS OF THE SPACE POWER RESEARCH LABORATORY SPRL - ENERGY CONVERSION LABORATORY ECL - REDOX - RESEARCH ANALYSIS CENTER RAC - BASIC MATERIALS LABORATORY BML - VERTICAL LIFT FACILITY VLF

1980-01-01

291

Nuclear Rings in Barred Galaxies  

NASA Astrophysics Data System (ADS)

Dust lanes, nuclear rings and nuclear spirals are typical structures in the inner region of barred galaxies. Their shapes and properties are linked to the physical parameters of galaxies. To study galaxy formation and evolution revealed by these gas features, we need to understand what conditions are responsible to the gas flow patterns. Here we use high-resolution hydrodynamical simulations to study 2D gas flows in simple barred models. We find that the location and thickness of nuclear rings are tightly correlated with galactic properties, such as the pattern speed and central mass concentration, within certain ranges. Our result may have important implications for measuring the parameters of real barred galaxies observed by IFU.

Shen, Juntai

2014-05-01

292

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

293

Modal decomposition of exterior acoustic-structure interaction problems with model order reduction.  

PubMed

A numerical technique for modal decomposition of the acoustic responses of structures submerged in a heavy fluid medium using fluid-loaded structural modes is presented. A Krylov subspace model order reduction approach to reduce the computational effort required for a fully coupled finite element/boundary element model is described. By applying the Krylov subspace to only the structural part of the global system of equations for the fully coupled problem, only the frequency independent finite element matrices are reduced. A fluid-loaded cylindrical shell closed at each end by hemispherical end caps is examined. The cylinder is excited by a ring of axial or transverse forces acting at one end. The individual contributions of the cylinder circumferential modes to the sound power and directivity of the radiated sound pressure are observed. The technique presented here provides a tool for greater physical insight into exterior acoustic-structure interaction problems using fully coupled numerical models, with significantly reduced computational effort. PMID:24815254

Peters, Herwig; Kessissoglou, Nicole; Marburg, Steffen

2014-05-01

294

The Kinematic Environment of Nuclear Rings  

NASA Astrophysics Data System (ADS)

We utilize the DensePak fiber-optic array on the KPNO WIYN telescope to construct two-dimensional H? velocity fields of ten nuclear rings. We find that residual velocities are low (no greater than 20 km/s) within the nuclear rings, which describe a non-turbulent environment where star formation can flourish without the presence of strong shocks and shears within the ring. Dispersions are also comparably low (20 km/s to 50 km/s) within all of the nuclear rings studied. The low dispersions and residuals correlate spatially with the strongest H? emissions and high H? luminosities in the nuclear rings. This scenario implies that the gas is calm in the rings and relatively non-turbulent, which allows star formation to ignite. Our results, when combined with H? imaging data, also indicate that the nuclear rings are nearly circular and typically in the same plane as the galaxy disk. In two cases, there exist large offsets between the ring kinematic and photometric position angles. These are attributed to complex interactions with the bar or with a known merging galactic system. Of the barred galaxies in the sample, the outer boundary of the nuclear ring is delineated by a thin shell of steep velocity gradients, with the strongest velocity transitions existing across the outer edge of the nuclear ring along the bar minor axis. This location correlates with the intersection of the ends of the bar dust lanes with the outer edge of the nuclear ring, as well as the location of the youngest HII regions within each ring. From this, we deduce that material from the bar is efficiently transferred to the nuclear ring, with star formation ensuing on short time scales.

Mazzuca, Lisa M.; Swaters, R. A.; Veilleux, S.; Veilleux, S.

2009-05-01

295

Molecular hydrogen in the galaxy and galactic gamma rays  

NASA Technical Reports Server (NTRS)

Recent surveys of 2.6 mm CO emission and 100 MeV gamma-radiation in the galactic plane reveal a striking correlation suggesting that both emissions may be primarily proportional to the line-of-sight column density of H2 in the inner galaxy. Both the gamma ray and CO data suggest a prominent ring or arm consisting of cool clouds of H2 at a galactocentric distance of approximately 5 kpc with a mean density of approximately 4 atoms/cu cm. The importance of H2 in understanding galactic gamma ray observations is also reflected in the correlation of galactic latitude distribution of gamma rays and dense dust clouds. A detailed calculation of the gamma ray flux distribution in the 0 deg to 180 deg range using the CO data to obtain the average distribution of molecular clouds in the galaxy shows that most of the enhancement in the inner galaxy is due to pion-decay radiation and the 5 kpc ring plays a major role. Detailed agreement with the gamma ray data is obtained with the additional inclusion of contributions from bremsstrahlung and Compton radiation of secondary electrons and Compton radiation from the intense radiation field near the galactic center.

Stecker, F. W.; Solomon, P. M.; Scoville, N. Z.; Ryter, C. E.

1975-01-01

296

Vascular ring  

MedlinePLUS

... following tests can help diagnose vascular ring: Chest x-ray Computed tomography (CT) scan of the heart Camera down the throat to examine the airways (bronchoscopy) Magnetic resonance imaging ... of heart X-ray of blood vessels (angiography) X-ray of the ...

297

Implications of the IRAS data for galactic gamma-ray astronomy and EGRET  

NASA Technical Reports Server (NTRS)

Using the results of gamma-ray, millimeter wave and far infrared surveys of the galaxy, one can derive a logically consistent picture of the large scale distribution of galactic gas and cosmic rays, one tied to the overall processes of stellar birth and destruction on a galactic scale. Using the results of the IRAS far-infrared survey of the galaxy, the large scale radial distribution of galactic far-infrared emission were obtained independently for both the Northern and Southern Hemisphere sides of the Galaxy. It was found that the dominant feature in these distributions to be a broad peak coincident with the 5 kpc molecular gas cloud ring. Also found was evidence of spiral arm features. Strong correlations are evident between the large scale galactic distributions of far infrared emission, gamma-ray emission and total CO emission. There is a particularly tight correlation between the distribution of warm molecular clouds and far-infrared emission on a galactic scale.

Stecker, F. W.

1990-01-01

298

Molecular hydrogen in the galaxy and galactic gamma rays  

Microsoft Academic Search

Recent surveys of 2.6 mm CO emission and 100 MeV gamma-radiation in the ; galactic plane reveal a striking correlation suggesting that both emissions may ; be primarily proportional to the line-of-sight column density of H2 in the inner ; galaxy. Both the gamma ray and CO data suggest a prominent ring or arm ; consisting of cool clouds of

F. W. Stecker; P. M. Solomon; N. Z. Scoville; C. E. Ryter

1975-01-01

299

The Galactic rotation curve from red clump stars  

NASA Astrophysics Data System (ADS)

We use line-of-sight velocities of more than 4000 red clump stars observed from MMT/Hectospec to derive the Galactic rotation curve between 8 and 13 kpc in Galactocentric radius to better than 10 km s-1. A three-component (bulge+disk+halo) with an additional massive ring of 1.66×1010 M? at about 11.6 kpc provides an excellent fit with the observation.

Liu, Chao; van de Ven, Glenn; Fang, Min; Wu, Yue; Carrell, Kenneth; Xue, Xiangxiang

2014-01-01

300

The 3-dimensional structure of Saturn's E ring inferred from Cassini CDA observations  

NASA Astrophysics Data System (ADS)

Seven years of Cassini observations dramatically changed our understanding of Saturn's diffuse dust ring . Before Cassini's insertion into its orbit around Saturn in 2004, the E ring was thought to extend from 3RS to 7RS (Saturn radius RS = 60 330km) and to be dominantly composed of micron-sized water ice grains. In-situ observations by Cassini's Cosmic Dust Analsyer (CDA) showed, however, that the ring extens at least until Titan's Orbit (? 20RS) and that the ring particle population ranges between a few nanometers and few tens of micrometers [15]. Recent observations by the Cassini camera ISS and by CDA revealed a complex ring morphology [3, 7]. The radial density profile of the ring turned out to depend on the longitude relative to Sun. On the morning side the ring's density peak is inside the orbit of the ring's source moon Enceladus, while on the evening side the density peak is exterior of Enceladus's orbit.

Kempf, S.; Horanyi, M.; Juhasz, A.; Cruz, A.; Srama, R.; Postberg, F.; Spahn, F.; Schmidt, J.

2012-09-01

301

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

302

Electrochemical cell apparatus having an exterior fuel mixer nozzle  

DOEpatents

An electrochemical apparatus (10) is made having a generator section (22) containing electrochemical cells (16), a fresh gaseous feed fuel inlet (28), a gaseous feed oxidant inlet (30), and at least one hot gaseous spent fuel recirculation channel (46), where the spent fuel recirculation channel (46), a portion of which is in contact with the outside of a mixer chamber (52), passes from the generator chamber (22) to combine with the fresh feed fuel inlet (28) at the entrance to the mixer chamber, and a mixer nozzle (50) is located at the entrance to the mixer chamber, where the mixer chamber (52) connects with the reforming chamber (54), and where the mixer-diffuser chamber (52) and mixer nozzle (50) are exterior to and spaced apart from the combustion chamber (24), and the generator chamber (22), and the mixer nozzle (50) can operate below 400.degree. C.

Reichner, Philip (Plum Borough, PA); Doshi, Vinod B. (Monroeville, PA)

1992-01-01

303

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

304

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

305

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

306

Myoblast fusion requires fibronectin degradation by exteriorized m-calpain.  

PubMed

We recently reported that when myoblasts fuse, m-calpain could be exteriorized. Indeed, at present a number of works support this hypothesis because this enzyme was localized intercellularly and more particularly associated to extracellular matrix components. Knowing that the cell surface of the fusing myoblast is supposed to undergo many changes, we addressed the question whether m-calpain could be involved in the phenomenon of fusion via fibronectin cleavage or degradation. Using different digestion experiments, we demonstrated that soluble purified fibronectin and highly insoluble fibronectin fibrils represent very good substrates for this proteinase; moreover, at the burst of fusion, fibronectin proteolytic fragments could be identified. On the other hand, we have conducted biological assays on cultured myoblasts using a defined medium supplemented by exogenous factors capable of stimulating or inhibiting m-calpain activity. The effects of such factors on rat myoblast fusion and concomitantly on the targeted glycoprotein were analyzed and quantified. When m-calpain activity and the phenomenon of fusion were reduced (defined medium without insulin), the amount of the 220-kDa fibronectin band was increased by 43%. When m-calpain activity and myoblast fusion were prevented by addition of antibodies to m-calpain or calpain inhibitor II, the fibronectin concentration was higher since it was increased by approximately 67 and approximately 71%, respectively. In addition, when observed at the ultrastructural level, m-calpain seems to be localized at the potential fusion site of myoblasts and more particularly associated to the extracellular matrix when muscle cells were initially treated by anti-m-calpain IgG. Taken together, these results support the hypothesis that exteriorized m-calpain could be, in part, involved in myoblast fusion via fibronectin alteration or degradation. PMID:9299163

Dourdin, N; Brustis, J J; Balcerzak, D; Elamrani, N; Poussard, S; Cottin, P; Ducastaing, A

1997-09-15

307

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

308

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

309

Infrared Mapping of the Galactic Plane. 4. The Galactic Center.  

National Technical Information Service (NTIS)

Mid-infrared observations of the galactic center region were obtained at 4, 11, 29, and 27 micrometers on three rocket-borne experiments. The diffuse emission around the galactic center can be separated into three components: (a) a foreground emission fro...

S. J. Little S. D. Price

1985-01-01

310

Ring lasers  

SciTech Connect

The invention provides a ring laser having one or more parallelsided prisms, or other refracting device, positioned in the light path of the laser resonant cavity formed by, for example, three mirrors, and including a solenoid or other means for imparting oscillatory translational motion to the prism or prisms or refracting device with a component parallel to the portion of the light path which passes therethrough.

Lindop, A.J.

1981-01-27

311

Supershells and galactic fountains.  

NASA Astrophysics Data System (ADS)

In the gaseous disk of our Galaxy as well as in other galaxies, HI structures (shells, bubbles, holes, etc.) on scales of 0.1-1 kpc are recognized to be common features; see e.g. the comprehensive review by Tenorio-Tagle and Bodenheimer (1988). The larger ones are usually named with the prefix "super". The estimated energies which are required to produee sueh large objeets are high - up to some 1054 erg. These energetic events must exert a significant influenee upon the gaseous galactic disk and eorona.

Shustov, B. M.

1989-03-01

312

Effects of apartment building façade and balcony design on the reduction of exterior noise  

Microsoft Academic Search

The effects of building façade and balcony design on the reduction of exterior noise were investigated by measuring the noise from traffic at an apartment complex located by a road side as well as the sound field characteristics of an area surrounded by four apartment buildings. The efficiency of different balcony forms for reducing exterior noise was determined using a

Pyoung Jik Lee; Yong Hee Kim; Jin Yong Jeon; Kyoo Dong Song

2007-01-01

313

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

314

EGP (Exterior Gateway Protocol) Gateway under Berkeley UNIX 4.2.  

National Technical Information Service (NTIS)

This report describes an implementation of the Exterior Gateway Protocol that runs under the UNIX 4.2 BSD operating system. Some issues related to local network configurations are also discussed. The Exterior Gateway Protocol has been specified to allow a...

P. Kirton

1984-01-01

315

NEW MODEL FOR JOINT SHEAR FAILURE OF R\\/C EXTERIOR BEAM-COLUMN JOINTS  

Microsoft Academic Search

A new analytical models for joint shear failure of reinforced concrete exterior beam-column joints is proposed. It is used for predictidction of strength and failure modes and it is extended from a model for interior beam-column joints by the author. The model contains no empirical factors accounting the difference between exterior and interior joint. The both model considers four diago-

Hitoshi Shiohara

316

Star sensor calibration based on interior-exterior parameters and error compensation  

NASA Astrophysics Data System (ADS)

The researches on calibration of star sensor rarely involve the exterior parameters and image distortion of the optical system. In order to get more accurate interior-exterior parameters of the optical system, this paper proposes exact calibration model and algorithm based on interior-exterior parameters. Basing on analyzing the imaging model of star sensor, the principle of the star sensor calibration is as follow: firstly, the two-step method is used to get the initial interior-exterior parameters; then Levenberg-Marquardt optimization algorithm is utilized to get the global optimal solution. Experiments show that the angular distance of stars can be reduced from 57" to 5.2" after calibration. In addition, the calibration method can effectively eliminate the coupling of the interior-exterior parameters, achieve higher measurement accuracy, and significantly improve the recognition rate of the star map.

Liu, Shoubao; Ma, Jie; Yan, Fei; Zhu, Yadong; Tian, Jinwen; Fu, Wenxing

2013-10-01

317

Diffuse galactic gamma ray lines  

NASA Technical Reports Server (NTRS)

The production rate of 4.44-MeV line for a variety of assumed cosmic ray spectra is evaluated. These results are compared with reported galactic gamma-ray line intensities and are consistent with a low energy cosmic ray density which increases toward the galactic center in proportion to the molecular gas density.

Lingenfelter, R. E.; Ramaty, R.

1977-01-01

318

Hydrodynamics of galactic dark matter  

Microsoft Academic Search

We consider simple hydrodynamical models of galactic dark matter in which the galactic halo is a self-gravitating and self-interacting gas that dominates the dynamics of the galaxy. Modelling this halo as a spherically symmetric and static perfect fluid satisfying the field equations of general relativity, visible baryonic matter can be treated as 'test particles' in the geometry of this field.

Luis G. Cabral-Rosetti; Tonatiuh Matos; Darío Nuñez; Roberto A. Sussman

2002-01-01

319

Hydrodynamics of galactic dark matter  

Microsoft Academic Search

We consider simple hydrodynamical models of galactic dark matter in which the galactic halo is a self-gravitating and self-interacting gas that dominates the dynamics of the galaxy. Modelling this halo as a spherically symmetric and static perfect fluid satisfying the field equations of general relativity, visible baryonic matter can be treated as 'test particles' in the geometry of this field.

Roberto A Sussman

320

Hydrodynamics of galactic dark matter  

Microsoft Academic Search

We consider simple hydrodynamical models of galactic dark matter in which the galactic halo is a self-gravitating and self-interacting gas that dominates the dynamics of the galaxy. Modelling this halo as a spherically symmetric and static perfect fluid satisfying the field equations of general relativity, visible baryonic matter can be treated as ‘test particles’ in the geometry of this field.

Luis G. Cabral-Rosetti; Tonatiuh Matos; Darío Nuñez; Roberto A. Sussman

2002-01-01

321

The galactic evolution of lithium  

Microsoft Academic Search

Measurements of lithium in stars of different galactic populations such as young open clusters (a Per, Pleiades, Praesepe, Coma, Hyades), very young stellar associations (Taurus-Auriga, Chamaeleon, Ophiuchus clouds), intermediate and old open clusters (NGC 752, M 67, NGC 188), old disc stars and halo stars give us the observational framework from which the galactic evolution of lithium has to be

R. Rebolo

1989-01-01

322

Diffuse galactic radiation  

NASA Astrophysics Data System (ADS)

High-energy interstellar emission is produced by interactions of cosmic-ray electrons and nuclei with the interstellar medium and low-energy radiation fields in the Milky Way. This is not only a background for point-like and extended sources studies, but also a unique tool to learn about cosmic rays and the interstellar medium. Thanks to its energy range from 20 MeV to more than 300 GeV, its large effective area and field of view, its improved angular resolution, as well as an all-sky survey strategy, the Fermi Large Area Telescope (LAT) is the best instrument to study high-energy Galactic interstellar emission, which accounts for most of the photons it detects. To disentangle degeneracies in the GeV range, complementary observations are crucial at lower and higher energy, for example by INTEGRAL/SPI, CGRO/COMPTEL or HESS, as well as all-sky radio or sub-millimeter surveys. We provide an overview of the Galactic interstellar gamma-ray emission modeling and focus on ?-ray H I emissivity and large scale structures studies performed with the LAT.

Casandjian, Jean-Marc

2012-12-01

323

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

324

Molecular clouds and galactic spiral structure  

SciTech Connect

Two large-scale 2.6 mm CO surveys of the galactic plane, one in the first quadrant (l=12/sup 0/ to 60/sup 0/, b=-1/sup 0/ to +1/sup 0/), the other in the second (l=105/sup 0/ to 139/sup 0/, b=-3/sup 0/ to +3/sup 0/), have provided evidence that, contrary to previous findings, molecular clouds constitute a highly specific tracer of spiral structure. Molecular counterparts of five of the classical 21 cm spiral arms have been identified: the Perseus arm, the local arm (including Lindblad's local expanding ring), the Sagittarius arm, the Scutum arm, and the 4-kpc arm. The region between the local arm and the Perseus arm is apparently devoid of molecular clouds, and the interarm regions of the inner Galaxy appear largely so. CO spiral structure implies that the mean lifetime of molecular clouds cannot be greater than 1 x 10/sup 8/ years, the time required for interstellar matter to cross a spiral arm. Conservation of mass then sets a limit on the fraction of the interstellar medium in the form of molecular clouds: it cannot exceed one-half at any distance from the galactic center in the range 4--12 kpc.

Cohen, R.S.; Cong, H.; Dame, T.M.; Thaddeus, P.

1980-07-15

325

Ringing wormholes  

SciTech Connect

We investigate the response of traversable wormholes to external perturbations through finding their characteristic frequencies and time-domain profiles. The considered solution describes traversable wormholes between the branes in the two brane Randall-Sundrum model and was previously found within Einstein gravity with a conformally coupled scalar field. The evolution of perturbations of a wormhole is similar to that of a black hole and represents damped oscillations (ringing) at intermediately late times, which are suppressed by power-law tails (proportional to t{sup -2} for monopole perturbations) at asymptotically late times.

Konoplya, R.A.; Molina, C. [Instituto de Fisica, Universidade de Sao Paulo, C.P. 66318, 05315-970, Sao Paulo-SP (Brazil); Escola de Artes, Ciencias e Humanidades, Universidade de Sao Paulo, Avenida Arlindo Bettio 1000, CEP 05315, Sao Paulo-SP (Brazil)

2005-06-15

326

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

327

Conserved structural features on protein surfaces: small exterior hydrophobic clusters.  

PubMed

The extent to which side-chains at the surface of globular proteins adopt well-defined conformations is a matter of some controversy and, in turn, the idea that specific interactions amongst them might make a significant contribution to defining tertiary structures would be generally seen as questionable. In at least some cases, however, there is evidence for organisation of the surface to form discrete, tightly packed clusters. In this paper we examine the role of such clusters in accommodating large, hydrophobic residues on the exterior of protein structures. Taking poplar plastocyanin as a detailed example, we find a variety of ways in which solvent accessibility of such non-polar groups can be limited and we highlight, in particular, a rather simple type of cluster in which a single hydrophobic residue is substantially excluded from solvent by a cage of surrounding, chiefly hydrophilic, side-chains. Comparison with the structures of a number of other proteins which share with plastocyanin the Greek key beta-sandwich topology, but are otherwise unrelated, produces the remarkable finding that analogous clusters are commonly found in the topologically equivalent position. This suggests that these features, which we call small exterior hydrophobic clusters (SEHCs), may have an important structural role and we able that their recurrent position in these proteins is such that they may help to fix the register of non-sequential beta-strands and, perhaps, to specify their association during folding. Similar SEHCs can also be identified in other classes of protein structure and we give a four-helix bundle protein, the rop dimer, as an example. It seems likely that accommodation of large non-polar residues provides a mechanism for introducing a degree of local order in to the surface layers of proteins in solution and it is possible that this behavior could play a role in locking tertiary structures. Thus, while the packing of the hydrophobic core of a globular protein is surely the dominant driving force for folding, it may be that, in some cases at least, interactions among surface residues also play an important role in determining the fine details of the structure. PMID:7783191

Tisi, L C; Evans, P A

1995-06-01

328

24 CFR 200.946 - Building product standards and certification program for exterior finish and insulation systems...  

Code of Federal Regulations, 2010 CFR

...2010-04-01 false Building product standards...exterior finish and insulation systems, use of... § 200.946 Building product standards...exterior finish and insulation systems, use of...Exterior Finish and Insulation Systems shall...Design Loads for Buildings and Other...

2010-04-01

329

24 CFR 200.946 - Building product standards and certification program for exterior finish and insulation systems...  

Code of Federal Regulations, 2010 CFR

...2009-04-01 false Building product standards...exterior finish and insulation systems, use of... § 200.946 Building product standards...exterior finish and insulation systems, use of...Exterior Finish and Insulation Systems shall...Design Loads for Buildings and Other...

2009-04-01

330

Grains in galactic haloes  

NASA Technical Reports Server (NTRS)

Researchers considered the effect of extensive forces on dust grains subjected to the light and matter distribution of a spiral galaxy (Greenberg et al. (1987), Ferrini et al. (1987), Barsella et al (1988). Researchers showed that the combined force on a small particle located above the plane of a galactic disk may be either attractive or repulsive depending on a variety of parameters. They found, for example, that graphite grains from 20 nm to 250 nm radius are expelled from a typical galaxy, while silicates and other forms of dielectrics, after initial expulsion, may settle in potential minimum within the halo. They discuss only the statistical behavior of the forces for 17 galaxies whose luminosity and matter distribution in the disk, bulge and halo components are reasonably well known. The preliminary results of the study of the motion of a dust grain for NGC 3198 are given.

Ferrara, Andrea; Barsella, Bruno; Ferrini, F.; Greenberg, J. Mayo; Aiello, Santi

1989-01-01

331

A symplectic mapping model for the 3/4 exterior  

NASA Astrophysics Data System (ADS)

We present a symplectic mapping model to study the evolution of a small body at the 3/4 exterior resonance with Neptune, for planar and for three dimensional motion. The mapping is based on the averaged Hamiltonian close to this resonance and is constructed in such a way that the topology of its phase space is similar to that of the Poincaré map of the elliptic restricted three-body problem. Using this model we study the evolution of a small object near the 3/4 resonance. Both chaotic and regular motions are found, and it is shown that the initial phase of the object plays an important role on the appearance of chaos. In the planar case, objects that are phase-protected from close encounters with Neptune have regular orbits even at eccentricities up to 0.44. On the other hand objects that are not phase protected show chaotic behaviour even at low eccentricities. The introduction of the inclination to our model affects the stable areas around the 3/4 mean motion resonance, which now become thinner and thinner and finally at is=10° the whole resonant region becomes chaotic. This may justify the absence of a large population of objects at this resonance.

Kotoulas, Thomas A.; Hadjidemetriou, John D.

2003-11-01

332

The annihilation of galactic positrons  

NASA Technical Reports Server (NTRS)

The annihilation of galactic positrons is studied in order to evaluate the probabilities of various channels of annihilation and to calculate the spectrum of the resulting radiation. The narrow width (FWHM less than 3.2 keV) of the 0.511-MeV line observed from the galactic center by Leventhal, McCallum, and Stang (1978) implies that a large fraction of positrons should annihilate in a medium of temperature less than 100,000 K and ionization fraction greater than 0.05. H II regions at the galactic center could be possible sites of annihilation.

Bussard, R. W.; Ramaty, R.; Drachman, R. J.

1979-01-01

333

Implications of the IRAS data for galactic gamma ray astronomy and EGRET  

NASA Technical Reports Server (NTRS)

Using the results of gamma-ray, millimeter wave and far surveys of the galaxy, logically consistent picture of the large scale distribution of galactic gas and cosmic rays was derived, tied to the overall processes of stellar birth and destruction on a galactic scale. Using the results of the IRAS far-infrared survey of te galaxy, the large scale radial distributions of galactic far-infrared emission independently was obtained for both the Northern and Southern Hemisphere sides of the Galaxy. The dominant feature in these distributions was found to be a broad peak coincident with the 5 kpc molecular gas cloud ring. Evidence was found for spiral arm features. Strong correlations are evident between the large scale galactic distributions of far-infrared emission, gamma-ray emission and total CO emission. There is particularly tight correlation between the distribution of warm molecular clouds and far-infrared emission on a galactic scale. The 5 kpc ring was evident in existing galactic gamma-ray data. The extent to which the more detailed spiral arm features are evident in the more resolved EGRET (Energetic Gamma-Ray Experimental Telescope) data will help to determine more precisely the propagation characteristics of cosmic rays.

Stecker, Floyd W.

1990-01-01

334

The Galactic nucleus: A unique region in the Galactic ecosystem  

NASA Technical Reports Server (NTRS)

The nucleus is a unique region in the Galactic ecosystem. It is also superb laboratory of modern astrophysics where astronomers can study, at unprecedented spatial resolution and across the entire electromagnetic spectrum, physical processes that may also happen at the cores of other galaxies. Infrared observations from the Kuiper Airborne Observatory have made important contributions to unraveling the mysteries of the Galactic nucleus and this review highlights some of these measurements, as well as recent results regarding the central parsec.

Genzel, Reinhard; Poglitsch, Albrecht

1995-01-01

335

Kinematics and dynamics of molecular gas in galactic centers  

NASA Astrophysics Data System (ADS)

The central molecular zone (CMZ) in the central half kpc of the Milky Way is a massive concentration of molecular gas in the center of a barred spiral galaxy. Current and past activities in the Galactic center include the formation of massive stars/clusters, AGN feeding, and feedback. At the same time, observations of molecular gas in external galaxies show that many disk galaxies have similar condensations of molecular gas in their central kpc or so. They also have CMZs, or nuclear molecular rings or concentrations in more common terms among extragalactic observers. The formation of the CMZs are often, but not always, related to stellar bars. The centers of nearby galaxies can provide valuable information on the general properties of galactic centers and CMZs through comparative studies of multiple galactic centers of different characteristics from various viewing angles. Linear resolutions achieved toward nearby extragalactic CMZs with modern radio interferometers are now comparable to those achieved toward the Galactic CMZ with small single-dish telescopes. I review and present work on the formation mechanism and properties of the CMZs in external galaxies with some comparisons with the CMZ of our Galaxy.

Sakamoto, K.

2014-05-01

336

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

337

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

338

The VLA Galactic Plane Survey  

Microsoft Academic Search

The VLA Galactic Plane Survey (VGPS) is a survey of HI and 21-cm continuum\\u000aemission in the Galactic plane between longitude 18 degrees 67 degr. with\\u000alatitude coverage from |b| < 1.3 degr. to |b| < 2.3 degr. The survey area was\\u000aobserved with the Very Large Array (VLA) in 990 pointings. Short-spacing\\u000ainformation for the HI line emission was

J. M. Stil; T. Rothwell; A. R. Taylor; J. M. Dickey; F. J. Lockman; P. G. Martin; A. I. Boothroyd; N. M. McClure-Griffiths

2006-01-01

339

EXTERIOR VIEW LOOKING WEST,BLAST FURNACE TO THE RIGHT, ORE YARD ...  

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

EXTERIOR VIEW LOOKING WEST,BLAST FURNACE TO THE RIGHT, ORE YARD TO THE CENTER, HEYL & PATTERSON CAR DUMPER TO THE LEFT. - Pittsburgh Steel Company, Monessen Works, Blast Furnace No. 3, Donner Avenue, Monessen, Westmoreland County, PA

340

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...

341

One Type of Automatically Adjusted Difference Scheme with Artificial Viscosity to Calculate Ablated Exterior Shapes.  

National Technical Information Service (NTIS)

In the calculation of the exterior form of ablated reentry nose tips, through automatic wave filter processing with reference to the shape of the object, a type of explicit difference scheme with added artificial viscosity quantities was created. This typ...

M. Yang

1992-01-01

342

Reverberation Time Measurements in the NASA Langley Exterior Effects Room (EER).  

National Technical Information Service (NTIS)

One-third octave band background noise and reverberation time measurements were conducted in the Exterior Effect Room (EER) at the NASA Langley Research Center. The related overall acoustic absorption of the room was calculated. The acoustic field in the ...

F. W. Grosveld

2006-01-01

343

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

344

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

345

3. EXTERIOR, SOUTH REAR VIEW OF C.F. WHEELER GROCERY GARTON ...  

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

3. EXTERIOR, SOUTH REAR VIEW OF C.F. WHEELER GROCERY GARTON BAKERY AND CONFECTIONERY AND NIELSEN, GEHRKE AND HANSEN CLOTHING STORE - East Locust Street Commercial District, 521-529 East Locust Street, Des Moines, Polk County, IA

346

Preliminary Investigation into the Exterior use of Elastomeric Acrylic Coatings for Naval Facilities.  

National Technical Information Service (NTIS)

This effort is in response to a request by the Naval Facilities Engineering Command (Atlantic Division) to conduct a preliminary investigation into elastomeric acrylic coatings for exterior use by Naval facilities. Findings are as follows: (a) A water-bas...

J. H. Brandon C. D. Gaughen

2000-01-01

347

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

348

Development of Fire Safety Criteria for Composite. Polymeric Exterior Walls, Volume 1.  

National Technical Information Service (NTIS)

This report describes the research project and summarizes the results of the program testing the fire performance of composite polymeric exterior walls used in one - story and two - story residential dwellings. It describes the results of three tests cond...

R. B. Williamson F. L. Fisher

1982-01-01

349

Exterior view, looking southeast OvertheHorizon Backscatter Radar Network, Tulelake ...  

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

Exterior view, looking southeast - Over-the-Horizon Backscatter Radar Network, Tulelake Radar Site Receive Sector Six Receiver Building, Unnamed Road West of Double Head Road, Tulelake, Siskiyou County, CA

350

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

351

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 Six Receiver Building, Unnamed Road West of Double Head Road, Tulelake, Siskiyou County, CA

352

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

353

General exterior view looking north. Boiler house is center/left. Engine ...  

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

General exterior view looking north. Boiler house is center/left. Engine house is center right. - Burnsville Natural Gas Pumping Station, Saratoga Avenue between Little Kanawha River & C&O Railroad line, Burnsville, Braxton County, WV

354

Exterior view looking north/northwest showing water intake from Little Kanawha ...  

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

Exterior view looking north/northwest showing water intake from Little Kanawha River on right. - Burnsville Natural Gas Pumping Station, Saratoga Avenue between Little Kanawha River & C&O Railroad line, Burnsville, Braxton County, WV

355

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

356

Exterior, east side of garage/apartment unit above garage with north ...  

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

Exterior, east side of garage/apartment unit above garage with north side of house along left half of photo, facing southwest - Morris Landau House, 638 North Faring Road, Los Angeles, Los Angeles County, CA

357

Shear Strength Models of Exterior Beam-Column Joints without Transverse Reinforcement.  

National Technical Information Service (NTIS)

This study suggests a semi-empirical model and an analytical model to predict the shear strength of reinforced concrete (RC) exterior beam-column joints without transverse reinforcement (denoted as unreinforced) in the joint region. A large experimental d...

K. M. Mosalam S. Park

2009-01-01

358

On Neumann's Method for the Exterior Neumann Problem for the Helmholtz Equation.  

National Technical Information Service (NTIS)

The exterior Neumann problem for the Helmholtz equation is formulated as a boundary integral equation for a class of closed surfaces in Euclidean 3-space, including nonconvex surfaces with corners and conical points excluding spines. Methods of potential ...

R. E. Kleinman W. L. Wendland

1977-01-01

359

Acoustic Calibration of the Exterior Effects Room at the NASA Langley Research Center.  

National Technical Information Service (NTIS)

The Exterior Effects Room (EER) at the NASA Langley Research Center is a 39-seat auditorium built for psychoacoustic studies of aircraft community noise. The original reproduction system employed monaural playback and hence lacked sound localization capab...

A. R. Aumann F. Surucu J. Klos K. J. Faller S. A. Rizzi W. L. Chapin

2010-01-01

360

LOFT, TAN650. Closer view of service building and exterior piping. ...  

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

LOFT, TAN-650. Closer view of service building and exterior piping. Camera facing east. Date: May 2004. INEEL negative no. HD-39-20-4 - Idaho National Engineering Laboratory, Test Area North, Scoville, Butte County, ID

361

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

362

Exterior, looking southeast at north and west elevations OvertheHorizon ...  

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

Exterior, looking southeast at north and west elevations - Over-the-Horizon Backscatter Radar Network, Moscow Radar Site Transmit Sector Three Transmitter Building, At the end of Steam Road, Moscow, Somerset County, ME

363

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

364

Cluster Observations of Ion Dispersions near the Exterior Cusp  

NASA Astrophysics Data System (ADS)

The cusps are the places where the Earth's magnetic field lines, connected to the inner side of the magnetopause, converge. It is therefore the place where signatures of processes occurring near the subsolar point, in the tail lobes, as well as near the dawn and dusk flanks are observed. The main process that injects solar wind plasma into the polar cusp is now generally accepted to be magnetic reconnection. Depending on the IMF direction, this process will take place equatorward (for IMF southward), poleward (for IMF northward) or on the side (for IMF azimuthal) of the cusp. We report a Cluster crossing on 5 January 2002 near the exterior cusp on the southern dusk side. The IMF was mainly azimuthal (IMF-By around -5 nT), the solar wind speed around 280 km/s and the density around 5 cm-3. The four Cluster spacecraft were still in the "magnetotail" configuration with two perfect tetrahedra of 2000 km around apogee and turning into an elongated configuration near the magnetopause. C4 was the first spacecraft to enter the cusp around 19:52:04 UT, followed by C2 at 19:52:35 UT, C1 at 19:54:24 UT and C3 at 20:13:15 UT. C4 and C1 observed two ion energy dispersions at 20:10 UT and 20:40 UT and C3 at 20:35 UT and 21:15 UT. We will investigate the origin of the injections forming the dispersions and if these can be explained by the reconnection between the interplanetary magnetic field and the Earth's magnetic field.

Escoubet, C.; Grison, B.; Berchem, J.; Trattner, K. J.; Pitout, F.; Richard, R. L.; Taylor, M. G.; Laakso, H. E.; Masson, A.; Dunlop, M. W.; Dandouras, I. S.; Reme, H.; Fazakerley, A. N.; Daly, P. W.

2013-12-01

365

Permanent magnet synchronous motor with exterior-rotor : Distributed or concentrated windings – motor performance comparison  

Microsoft Academic Search

Purpose – The paper aims to present the comparison between the performances of the exterior-rotor permanent magnet synchronous motors with distributed windings and the performances of the exterior-rotor permanent magnet synchronous motors with concentrated windings. Design\\/methodology\\/approach – Finite element method is used for motors performance determination. The BLDC operation mode for the motors with different slot and pole number combination

Bojan Štumberger; Gorazd Štumberger; Miralem Hadžiselimovi?; Ivan Zagradišnik; Anton Hamler; Mladen Trlep

2006-01-01

366

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.

Tinetti, Giovanna

2014-01-01

367

Galactic planetary science.  

PubMed

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

2014-04-28

368

Imaging of a circumsolar dust ring near the orbit of Venus.  

PubMed

The gravitational interaction of dust in the zodiacal cloud with individual planets is expected to give rise to ringlike features: Such a circumsolar ring has been observed associated with Earth, but such resonance rings have not been confirmed to exist for other planets. Here, we report on sensitive photometric observations, based on imaging from the STEREO mission, that confirm the existence of a dust ring at the orbit of Venus. The maximum overdensity of dust in this ring, compared to the zodiacal cloud, is ~10%. The radial density profile of this ring differs from the model used to describe Earth's ring in that it has two distinct steplike components, with one step being interior and the other exterior to the orbit of Venus. PMID:24264987

Jones, M H; Bewsher, D; Brown, D S

2013-11-22

369

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

370

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

371

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

372

The Galactic Centre pulsar population  

NASA Astrophysics Data System (ADS)

The recent discovery of a magnetar in the Galactic Centre region has allowed Spitler et al. to characterize the interstellar scattering in that direction. They find that the temporal broadening of the pulse profile of the magnetar is substantially less than that predicted by models of the electron density of that region. This raises the question of what the plausible limits for the number of potentially observable pulsars - i.e. the number of pulsars beaming towards the Earth - in the Galactic Centre are. In this Letter, using reasonable assumptions - namely (i) the luminosity function of pulsars in the Galactic Centre region is the same as that in the field, (ii) the region has had a constant pulsar formation rate, (iii) the spin and luminosity evolution of magnetars and pulsars are similar and (iv) the scattering in the direction of the Galactic Centre magnetar is representative of the entire inner parsec - we show that the potentially observable population of pulsars in the inner parsec has a conservative upper limit of ˜200 and that it is premature to conclude that the number of pulsars in this region is small. We also show that the observational results so far are consistent with this number and make predictions for future radio pulsar surveys of the Galactic Centre. L66

Chennamangalam, Jayanth; Lorimer, D. R.

2014-05-01

373

The Galactic center: not an active galactic nucleus  

NASA Astrophysics Data System (ADS)

We present 10 ?m - 35?m Spitzer spectra of the interstellar medium in the central molecular zone (CMZ), the central 210 pc × 60 pc of the Galactic center (GC). We present maps of the CMZ in ionic and H2 emission, covering a more extensive area than earlier spectroscopic surveys in this region. We compare diagnostic line ratios measured in the Spitzer Infrared Nearby Galaxies Survey to our data. Previous work shows that forbidden line ratios can distinguish star-forming galaxies from low-ionization nuclear emission-line regions (LINERs) and active galactic nuclei (AGNs). Our GC line ratios agree with star-forming galaxies and not with LINERs or AGNs.

An, Deokkeun; Ramírez, Solange V.; Sellgren, Kris

2014-05-01

374

Warped Disks and Inclined Rings around Galaxies  

NASA Astrophysics Data System (ADS)

Preface; Acknowledgements; Workshop participants; Group photograph; 1. The intergalactic HI supply F. Briggs; 2. Neutral gas infall into NGC 628 J. Kamphuis and F. Briggs; 3. VLA HI observations of the radio galaxy Centaurus A J. M. van der Hulst, J. H. van Gorkom, A. D. Haschick and A. D. Tubbs; 4. A geometric model for the dust-band of Centaurus A R. A. Nicholson, K. Taylor and J. Bland; 5. The circumgalactic ring of gas in Leo S. E. Schneider; 6. Using gas kinematics to measure M/L in elliptical galaxies T. de Zeeuw; 7. Velocity fields of disks in triaxial potentials P. J. Teuben; 8. Modeling the atomic gas in NGC 4278 J. F. Lees; 9. A few statistics from the catalog of polar-ring galaxies B. C. Whitmore; 10. Dynamics of polar rings L. S. Sparke; 11. Mergers and the structure of disk galaxies L. Hernquist; 12. Formation of polar rings H.-W. Rix and N. Katz; 13. Gas-dynamical models of settling disks D. Christodoulou and J. E. Tohline; 14. Evolutionary processes affecting galactic accretion disks T. Steiman-Cameron; 15. Particle simulations of polar rings T. Quinn; 16. A bending instability in prolate stellar systems D. Merritt; 17. The Milky Way: lopsided or barred? K. Kuijken; 18. Merger origin of starburst galaxies L. Hernquist; 19. Warped and flaring HI disks A. Bosma; 20. Behaviour of warps in extended disks F. Briggs and J. Kamphuis; 21. Observational constraints for the explanation of warps E. Battaner, E. Florido, M.-L. Sanchez-Saavedra and M. Prieto; 22. Warps in S0s: observations versus theories G. Galletta; 23. Warps and bulges J. Pitesky; 24. Time evolution of galactic warps P. Hofner and L. S. Sparke; 25. Are warps normal modes? S. Casertano; 26. Disk warping in a slewing potential E. C. Ostriker; 27. Concluding discussion Moderator: K. C. Freeman; Name index; Object index; Subject index.

Casertano, Stefano; Sackett, Penny D.; Briggs, Franklin H.

2006-11-01

375

Bubbles in the galactic haloes  

NASA Astrophysics Data System (ADS)

We briefly discuss a possible interconnection of vertical HI structures observed in the Milky Way galaxy with large scale blowing out explosions by clustered SNe. We argue that the observed OB associations can produce only about 60 such events, or approximately one chimney per 3 kpc2 within the solar circle. We also discuss the overall properties of HI shells in nearby face-on galaxies and the distribution of H and dust in edge-on galaxies. We argue that the presence of dust in galactic haloes may indicate that radiation pressure is the most probable mechanism capable of transporting dust to large heights above the galactic plane. In order to make this possible, the galactic magnetic field must have a strong vertical component. We mention that SNe explosions can initiate the Parker instability which in turn creates large scale magnetic loops with a strong vertical component. Recent observations of nearby edge-on galaxies favour this suggestion.

Shchekinov, Yu. A.; Dettmar, R.-J.; Schröer, A.; Steinacker, A.

2001-08-01

376

Galactic All-Sky Survey  

NASA Astrophysics Data System (ADS)

The Galactic All-Sky Survey (GASS) is a large scale project to produce a fully sampled survey of Galactic HI south of declination 0 degrees with 15 arcmin resolution, 1 km/s spectral resolution and a sensitivity limit of 70 mK. GASS will provide a dramatic improvement in resolution and sensitivity on the hugely successful Leiden-Dwingeloo and IAR surveys of Galactic HI. GASS aims to answer questions about the interaction of the Milky Way disk and halo, in particular: how is structure is created in the halo? and what are the kinematics of halo gas? The survey is also uniquely suited to studying the structure of intermediate and high velocity clouds, providing valuable information about their origins, thermal state and their interaction with the ambient medium. Here we provide a status report on the progress of GASS observations and data reduction and request 530 hours in the 06APRS term to complete the survey

McClure-Griffiths, Naomi; Pisano, Daniel; Staveley-Smith, Lister; Ford, Alyson; Kalberla, Peter; Dedes, Leonidas; Gibson, Brad; Lockman, F. J.

2006-04-01

377

Galactic All-Sky Survey  

NASA Astrophysics Data System (ADS)

The Galactic All-Sky Survey (GASS) is a large scale project to produce a fully sampled survey of Galactic HI south of declination 0 degrees with 15 arcmin resolution, 1 km/s spectral resolution and a sensitivity limit of 70 mK. GASS will provide a dramatic improvement in resolution and sensitivity on the hugely successful Leiden-Dwingeloo and IAR surveys of Galactic HI. GASS aims to answer questions about the interaction of the Milky Way disk and halo, in particular: how is structure is created in the halo? and what are the kinematics of halo gas? The survey is also uniquely suited to studying the structure of intermediate and high velocity clouds, providing valuable information about their origins, thermal state and their interaction with the ambient medium. This proposal follows on continuing status granted to GASS for the APRS06 term. Here we request the final 115 hours needed to complete GASS.

McClure-Griffiths, Naomi; Murphy, Tara; Pisano, Daniel; Staveley-Smith, Lister; Ford, Alyson; Kalberla, Peter; Dedes, Leonidas; Lockman, F. J.

2006-10-01

378

Where Galactic Snakes Live  

NASA Technical Reports Server (NTRS)

This infrared image from NASA's Spitzer Space Telescope shows what astronomers are referring to as a 'snake' (upper left) and its surrounding stormy environment. The sinuous object is actually the core of a thick, sooty cloud large enough to swallow dozens of solar systems. In fact, astronomers say the 'snake's belly' may be harboring beastly stars in the process of forming.

The galactic creepy crawler to the right of the snake is another thick cloud core, in which additional burgeoning massive stars might be lurking. The colorful regions below the two cloud cores are less dense cloud material, in which dust has been heated by starlight and glows with infrared light. Yellow and orange dots throughout the image are monstrous developing stars; the red star on the 'belly' of the snake is 20 to 50 times as massive as our sun. The blue dots are foreground stars.

The red ball at the bottom left is a 'supernova remnant,' the remains of massive star that died in a fiery blast. Astronomers speculate that radiation and winds from the star before it died, in addition to a shock wave created when it exploded, might have played a role in creating the snake.

Spitzer was able to spot the two black cloud cores using its heat-seeking infrared vision. The objects are hiding in the dusty plane of our Milky Way galaxy, invisible to optical telescopes. Because their heat, or infrared light, can sneak through the dust, they first showed up in infrared images from past missions. The cloud cores are so thick with dust that if you were to somehow transport yourself into the middle of them, you would see nothing but black, not even a star in the sky. Now, that's spooky!

Spitzer's new view of the region provides the best look yet at the massive embryonic stars hiding inside the snake. Astronomers say these observations will ultimately help them better understand how massive stars form. By studying the clustering and range of masses of the stellar embryos, they hope to determine if the stars were born in the same way that our low-mass sun was formed - out of a collapsing cloud of gas and dust - or by another mechanism in which the environment plays a larger role.

The snake is located about 11,000 light-years away in the constellation Sagittarius.

This false-color image is a composite of infrared data taken by Spitzer's infrared array camera and multiband imaging photometer. Blue represents 3.6-micron light; green shows light of 8 microns; and red is 24-micron light.

2006-01-01

379

The Heliosphere and Galactic Cosmic Rays  

NASA Video Gallery

The heliosphere deflects galactic cosmic rays from entering the system. Galactic cosmic rays are a very high energy form of particle radiation that are extremely difficult to shield against and are...

380

Observing the Next Galactic Supernova  

NASA Astrophysics Data System (ADS)

No supernova (SN) in the Milky Way has been observed since the invention of the optical telescope, instruments for other wavelengths, neutrino detectors, or gravitational wave observatories. It would be a tragedy to miss the opportunity to fully characterize the next one. To aid preparations for its observations, we model the distance, extinction, and magnitude probability distributions of a successful Galactic core-collapse supernova (ccSN), its shock breakout radiation, and its massive star progenitor. We find, at very high probability (sime 100%), that the next Galactic SN will easily be detectable in the near-IR and that near-IR photometry of the progenitor star very likely (sime 92%) already exists in the Two Micron All Sky Survey. Most ccSNe (98%) will be easily observed in the optical, but a significant fraction (43%) will lack observations of the progenitor due to a combination of survey sensitivity and confusion. If neutrino detection experiments can quickly disseminate a likely position (~3°), we show that a modestly priced IR camera system can probably detect the shock breakout radiation pulse even in daytime (64% for the cheapest design). Neutrino experiments should seriously consider adding such systems, both for their scientific return and as an added and internal layer of protection against false triggers. We find that shock breakouts from failed ccSNe of red supergiants may be more observable than those of successful SNe due to their lower radiation temperatures. We review the process by which neutrinos from a Galactic ccSN would be detected and announced. We provide new information on the EGADS system and its potential for providing instant neutrino alerts. We also discuss the distance, extinction, and magnitude probability distributions for the next Galactic Type Ia supernova (SN Ia). Based on our modeled observability, we find a Galactic ccSN rate of 3.2^{+7.3}_{-2.6} per century and a Galactic SN Ia rate of 1.4^{+1.4}_{-0.8} per century for a total Galactic SN rate of 4.6^{+7.4}_{-2.7} per century is needed to account for the SNe observed over the last millennium, which implies a Galactic star formation rate of 3.6^{+8.3}_{-3.0} M ? yr-1.

Adams, Scott M.; Kochanek, C. S.; Beacom, John F.; Vagins, Mark R.; Stanek, K. Z.

2013-12-01

381

Continuing galactic formation - A new concept of galactic evolution  

NASA Astrophysics Data System (ADS)

A new theory for galactic arm formation shows the arms to be continually emanating from the galactic nucleus due to a continual influx of cosmic dust. In the neighborhood of the nucleus the problem is treated as a fluid flow and a simple solution is given using conservation of momentum. When rotational dynamics are included the spinning arm system is the result. This solution resolves the problem of the 'missing mass', accounts for warped disk galaxies and gives a probable source for the gravity waves measured by Weber which emanate from our galactic center. Reversal of arm direction is demonstrated and examples of such reversals are cited. An approximate theoretical estimate of the age of our sun is found to be in good agreement with radio isotope dating. A general result shows why twin star systems are in such great abundance in a galaxy. It gives a model of galactic evolution which begins with only a single massive nucleus with the collapsing gas clouds forming the arms.

McCanney, J. M.

1981-01-01

382

Jupiter's ring-moon system  

Microsoft Academic Search

Ring-moons: environment, orbital properties and histories, satellite physical properties; Jupiter's rings: main ring, halo, gossamer rings; Processes acting on circumplanetary dust: drags and lifetimes, Lorentz resonances; The formation of Jupiter's rings: ring-moons as sources, generation of the gossamer rings, issues with the main ring, development of the halo.

Joseph A. Burns; Damon P. Simonelli; Mark R. Showalter; Douglas P. Hamilton; Carolyn D. Porco; Henry Throop; Larry W. Esposito

2004-01-01

383

Freestanding nanowire ring laser  

NASA Astrophysics Data System (ADS)

We demonstrate a freestanding nanowire ring laser, assembled by splicing the two ends of a CdS nanowire via a dissolved polymer nanowire. With ring diameter of less than 50 ?m, the free-standing nanowire ring laser shows low lasing threshold, high robustness, and excellent mechanical flexibility. Also, the nanowire ring laser works well in liquid environment, showing the possibility of integrating the nano-ring laser into an optofluidic system.

Hu, Zhifang; Guo, Xin; Tong, Limin

2013-10-01

384

Galactic Nuclei through the ``Lens  

Microsoft Academic Search

HST has now imaged upwards of 50 galactic nuclei. The sample divides into two broad categories: early-type bulges\\/ellipticals, and spirals. Early-type nuclei tend to follow broad trends foreshadowed by earlier ground-based data, but with some important differences. Large early-type galaxies show ``break radii\\

S. M. Faber

1993-01-01

385

The Galactic Magnetic Field as Viewed from the VLA  

NASA Astrophysics Data System (ADS)

Interstellar magnetic fields play critical roles in many astrophysical processes. Yet despite their importance, our knowledge about magnetic fields in our Galaxy remains limited. For the field within the Milky Way much of what we do know comes from radio astronomy, through observations of polarization and Faraday rotation measures (RMs) of extragalactic sources and pulsars. A high angular density of RM measurements in several critical areas of the Galaxy is needed to clarify the Galactic magnetic field structure. Understanding the overall structure of the magnetic field will subsequently help us determine the origin and evolution of the field. In an effort to determine the overall structure of the field, Sun et al. (2008) produced 3 models of the Galactic magnetic field based on RM measurements available at the time. These models made distinct predictions for RMs in a region of the inner Galaxy at low Galactic latitude. Using observations made with the Very Large Array (VLA), we have determined RMs for sources in this critical region. In this talk we will present the results of our study and show how the RMs strongly support the ASS+RING model.

van Eck, Cameron; Brown, Jo-Anne

2009-05-01

386

The Galactic Plane Infrared Polarization Survey (GPIPS): The Full Poster  

NASA Astrophysics Data System (ADS)

GPIPS will be completed in 2013, and the first data release (DR1) took place in August 2012 (see poster by L. Cashman). All of the 3,237 independent field observations, designed for the 10x10 arcmin Mimir instrument field of view, have been obtained, though a small number are being re-observed to meet our 2 arcsec seeing criterion. GPIPS data products include catalogs of stellar polarizations (POLCATs), catalogs of stellar photometry in the H-band (PHOTCATs), and deep co-added images for each field. The images for the entire 76 square degree region of the northern Galactic midplane surveyed have been mosaicked to create a large-format poster, which can be found elsewhere in the room. On the poster, data from the POLCATs are overlaid as polarization vectors, or circled stars for those exhibiting significant upper limits. Comparisons with other key data sets for correlative studies, such as the Galactic Ring Survey (Jackson et al. 2006), 2MASS (Skrutskie et al. 2006), WISE (Wright et al. 2010), the Bolocam Galactic Plane Survey (BGPS; Aguirre et al. 2011), GLIMPSE (Benjamin et al. 2003), and MIPSGAL (Mizuno et al. 2008) are also shown. Access to released GPIPS data is currently through our web server (gpips0.bu.edu), with planned upgrades to VO compliance and mirroring from other sites. This work is partially supported by NSF/MPS grants AST 06-07500 and AST 09-07790.

Clemens, Dan P.; Cashman, L. R.; Hoq, S.; Montgomery, J.; Pavel, M. D.

2013-01-01

387

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

388

A finite element exterior calculus framework for the rotating shallow-water equations  

NASA Astrophysics Data System (ADS)

We describe discretisations of the shallow-water equations on the sphere using the framework of finite element exterior calculus, which are extensions of the mimetic finite difference framework presented in Ringler (2010) [11]. The exterior calculus notation provides a guide to which finite element spaces should be used for which physical variables, and unifies a number of desirable properties. We present two formulations: a "primal" formulation in which the finite element spaces are defined on a single mesh, and a "primal-dual" formulation in which finite element spaces on a dual mesh are also used. Both formulations have velocity and layer depth as prognostic variables, but the exterior calculus framework leads to a conserved diagnostic potential vorticity. In both formulations we show how to construct discretisations that have mass-consistent (constant potential vorticity stays constant), stable and oscillation-free potential vorticity advection.

Cotter, C. J.; Thuburn, J.

2014-01-01

389

The Formation of Nuclear Rings in Barred Spiral Galaxies  

NASA Astrophysics Data System (ADS)

Although nuclear rings of gas and star formation are common in barred spiral galaxies, current theories of why and how they form do not provide the level of detail needed to quantify the effect that these rings can have on the fueling of active galactic nuclei and on the evolution of their host galaxy. In this paper we use detailed modeling to show that existence of nuclear rings is directly related to the existence of the orbit family whose major axis is perpendicular to the major axis of the bar (x2). We explore a large range of barred galaxy potentials, and for each potential we use a two-dimensional hydrodynamic simulation to determine whether and at what radius a nuclear ring forms. We compare the results of the hydrodynamic simulations to numerical integrations of periodic orbits in a barred potential and show that the rings only form when a minimum number of x2 orbits exist. Because the rings migrate inward with time as they accumulate gas, the radius at which a nuclear ring is seen does not give direct information on the shape of the rotation curve. We also show that the common assumption that nuclear rings are related to an inner Lindblad resonance is incorrect. In fact, we show that there is no resonance at the inner Lindblad resonance in barred galaxies. We also compare the predictions of this theory to Hubble Space Telescope observations and show that it correctly predicts the observed gas and star formation morphology of nuclear rings.

Regan, Michael W.; Teuben, Peter

2003-01-01

390

STRUCTURED MOLECULAR GAS REVEALS GALACTIC SPIRAL ARMS  

SciTech Connect

We explore the development of structures in molecular gas in the Milky Way by applying the analysis of the brightness distribution function and the brightness distribution index (BDI) in the archival data from the Boston University-Five College Radio Astronomy Observatory {sup 13}CO J = 1-0 Galactic Ring Survey. The BDI measures the fractional contribution of spatially confined bright molecular emission over faint emission extended over large areas. This relative quantity is largely independent of the amount of molecular gas and of any conventional, pre-conceived structures, such as cores, clumps, or giant molecular clouds. The structured molecular gas traced by higher BDI is located continuously along the spiral arms in the Milky Way in the longitude-velocity diagram. This clearly indicates that molecular gas changes its structure as it flows through the spiral arms. Although the high-BDI gas generally coincides with H II regions, there is also some high-BDI gas with no/little signature of ongoing star formation. These results support a possible evolutionary sequence in which unstructured, diffuse gas transforms itself into a structured state on encountering the spiral arms, followed by star formation and an eventual return to the unstructured state after the spiral arm passage.

Sawada, Tsuyoshi [Joint ALMA Office, Alonso de Cordova 3107, Vitacura, Santiago 763-0355 (Chile); Hasegawa, Tetsuo [NAOJ Chile Observatory, Joaquin Montero 3000 Oficina 702, Vitacura, Santiago 763-0409 (Chile); Koda, Jin, E-mail: sawada.tsuyoshi@nao.ac.jp [Department of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800 (United States)

2012-11-01

391

Active Exterior Cloaking for the 2D Laplace and Helmholtz Equations  

NASA Astrophysics Data System (ADS)

A new cloaking method is presented for 2D quasistatics and the 2D Helmholtz equation that we speculate extends to other linear wave equations. For 2D quasistatics it is proven how a single active exterior cloaking device can be used to shield an object from surrounding fields, yet produce very small scattered fields. The problem is reduced to finding a polynomial which is close to 1 in a disk and close to 0 in another disk, and such a polynomial is constructed. For the 2D Helmholtz equation it is numerically shown that three exterior cloaking devices placed around the object suffice to hide it.

Vasquez, Fernando Guevara; Milton, Graeme W.; Onofrei, Daniel

2009-08-01

392

Genetic code redundancy and its differential influence on the evolution of protein interiors versus exteriors.  

PubMed

The distinctive amino acid compositions of protein exteriors and interiors were compared to the composition bias imposed by genetic code redundancy. It transpired that the synonym allocation is biased more in favour of those residues which are preferred in interiors, and this leads to an average interior residue being more probable and less mutable compared to an exterior residue. The general implications for protein evolution are discussed in association with the known evolutionary behavior of particular protein families. It is suggested that some proteins may have their structural history "fossilised" in their interiors and that the "amino acid" code is in reality a "protein" code. PMID:3796012

Dufton, M J

1986-09-21

393

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

394

Stationary axisymmetric exteriors for perturbations of isolated bodies in general relativity, to second order  

SciTech Connect

Perturbed stationary axisymmetric isolated bodies, e.g. stars, represented by a matter-filled interior and an asymptotically flat vacuum exterior joined at a surface where the Darmois matching conditions are satisfied, are considered. The initial state is assumed to be static. The perturbations of the matching conditions are derived and used as boundary conditions for the perturbed Ernst equations in the exterior region. The perturbations are calculated to second order. The boundary conditions are overdetermined: necessary and sufficient conditions for their compatibility are derived. The special case of perturbations of spherical bodies is given in detail.

MacCallum, Malcolm A. H.; Mars, Marc; Vera, Rauel [School of Mathematical Sciences, Queen Mary, University of London, Mile End Road, London E1 4NS (United Kingdom); Facultad de Ciencias, Universidad de Salamanca, Plaza de la Merced s/n, 37008 Salamanca (Spain); Fisika Teorikoaren Saila, Euskal Herriko Unibertsitatea, 644 P.K. 48080 Bilbo, Basque Country (Spain)

2007-01-15

395

Jupiter's Main Ring/Ring Halo  

NASA Technical Reports Server (NTRS)

A mosaic of four images taken through the clear filter (610 nanometers) of the solid state imaging (CCD) system aboard NASA's Galileo spacecraft on November 8, 1996, at a resolution of approximately 46 kilometers (28.5 miles) per picture element (pixel) along Jupiter's rings. Because the spacecraft was only about 0.5 degrees above the ring plane, the image is highly foreshortened in the vertical direction. The images were obtained when Galileo was in Jupiter's shadow, peering back toward the Sun; the ring was approximately 2.3 million kilometers (1.4 million miles) away. The arc on the far right of the image is produced when sunlight is scattered by small particles comprising Jupiter's upper atmospheric haze. The ring also efficiently scatters light, indicating that much of its brightness is due to particles that are microns or less in diameter. Such small particles are believed to have human-scale lifetimes, i.e., very brief compared to the solar system's age.

Jupiter's ring system is composed of three parts - - a flat main ring, a lenticular halo interior to the main ring, and the gossamer ring, outside the main ring. The near and far arms of Jupiter's main ring extend horizontally across the mosaic, joining together at the ring's ansa, on the figure's far left side. The near arm of the ring appears to be abruptly truncated close to the planet, at the point where it passes into Jupiter's shadow. Some radial structure is barely visible across the ring's ansa (top image). A faint mist of particles can be seen above and below the main rings. This vertically extended 'halo' is unusual in planetary rings, and is probably caused by electromagnetic forces pushing the smallest grains out of the ring plane. Because of shadowing, the halo is not visible close to Jupiter in the lower right part of the mosaic. To accentuate faint features in the bottom image of the ring halo, different brightnesses are shown through color. Brightest features are white or yellow and the faintest are purple.

Jupiter's main ring is a thin strand of material encircling the planet. The diffuse innermost boundary begins at approximately 123,000 kilometers (76,429 miles). The main ring's outer radius is found to be at 128,940 kilometers (80,119 miles) +/-50 kilometers (31 miles), slightly less than the Voyager value of 129,130 kilometers (80,237 miles) +/-100 kilometers (62 miles), but very close to the orbit of the satellite Adrastea (128,980 kilometers or 80,144 miles). The main ring exhibits a marked drop in brightness at 127,849 kilometers (79,441 miles) +/-50 kilometers (31 miles), lying almost atop the orbit of the Jovian moon Metis at 127,978 kilometers (79,521 miles). Satellites seem to affect the structure of even tenuous rings like those found at Jupiter.

The Jet Propulsion Laboratory, Pasadena, CA manages the Galileo mission for NASA's Office of Space Science, Washington, DC. JPL is an operating division of California Institute of Technology (Caltech).

This image and other images and data received from Galileo are posted on the World Wide Web, on the Galileo mission home page at URL http://galileo.jpl.nasa.gov. Background information and educational context for the images can be found at URL http://www.jpl.nasa.gov/galileo/sepo

1997-01-01

396

The rings of Uranus  

NASA Technical Reports Server (NTRS)

The rings of Uranus are not all circular; nor do they all lie in the plane of Uranus' equator. The epsilon ring of Uranus, which is the largest and outermost one, ranges in width from 20 to 96 km in proportion to the distance of the ring material from Uranus. Typical rings can be modeled by assuming that its edges are defined by a combination of smooth elliptical orbits and random 'wiggles'. A transition from a few large moons in outer regions to many small moons just outside ring-filled inner regions is a feature noted to be held in common by the ring and moon systems of Saturn, Uranus, and Neptune.

Cuzzi, Jeffrey N.; Esposito, Larry W.

1987-01-01

397

The Galactic Center: Not an Active Galactic Nucleus  

NASA Astrophysics Data System (ADS)

We present 10 ?m-35 ?m Spitzer spectra of the interstellar medium in the Central Molecular Zone (CMZ), the central 210 pc × 60 pc of the Galactic center (GC). We present maps of the CMZ in ionic and H2 emission, covering a more extensive area than earlier spectroscopic surveys in this region. The radial velocities and intensities of ionic lines and H2 suggest that most of the H2 0-0 S(0) emission comes from gas along the line-of-sight, as found by previous work. We compare diagnostic line ratios measured in the Spitzer Infrared Nearby Galaxies Survey to our data. Previous work shows that forbidden line ratios can distinguish star-forming galaxies from low-ionization nuclear emission-line regions (LINERs) and active galactic nuclei (AGNs). Our GC line ratios agree with star-forming galaxies and not with LINERs or AGNs.

An, Deokkeun; Ramírez, Solange V.; Sellgren, Kris

2013-06-01

398

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

399

The physics of galactic winds driven by active galactic nuclei  

NASA Astrophysics Data System (ADS)

Active galactic nuclei (AGN) drive fast winds in the interstellar medium of their host galaxies. It is commonly assumed that the high ambient densities and intense radiation fields in galactic nuclei imply short cooling times, thus making the outflows momentum conserving. We show that cooling of high-velocity shocked winds in AGN is in fact inefficient in a wide range of circumstances, including conditions relevant to ultraluminous infrared galaxies (ULIRGs), resulting in energy-conserving outflows. We further show that fast energy-conserving outflows can tolerate a large amount of mixing with cooler gas before radiative losses become important. For winds with initial velocity vin ? 10 000 km s-1, as observed in ultraviolet and X-ray absorption, the shocked wind develops a two-temperature structure. While most of the thermal pressure support is provided by the protons, the cooling processes operate directly only on the electrons. This significantly slows down inverse Compton cooling, while free-free cooling is negligible. Slower winds with vin ˜ 1000 km s-1, such as may be driven by radiation pressure on dust, can also experience energy-conserving phases but under more restrictive conditions. During the energy-conserving phase, the momentum flux of an outflow is boosted by a factor ˜vin/2vs by work done by the hot post-shock gas, where vs is the velocity of the swept-up material. Energy-conserving outflows driven by fast AGN winds (vin ˜ 0.1c) may therefore explain the momentum fluxes ??LAGN/c of galaxy-scale outflows recently measured in luminous quasars and ULIRGs. Shocked wind bubbles expanding normal to galactic discs may also explain the large-scale bipolar structures observed in some systems, including around the Galactic Centre, and can produce significant radio, X-ray and ?-ray emission. The analytic solutions presented here will inform implementations of AGN feedback in numerical simulations, which typically do not include all the important physics.

Faucher-Giguère, Claude-André; Quataert, Eliot

2012-09-01

400

TiRiFiC: Tilted Ring Fitting Code  

NASA Astrophysics Data System (ADS)

Tilted Ring Fitting Code (TiRiFiC) is a prototype computer program to construct simulated (high-resolution) astronomical spectroscopic 3d-observations (data cubes) of simple kinematical and morphological models of rotating (galactic) disks. It is possible to automatically optimize the parameterizations of constructed model disks to fit spectroscopic (3d-) observations via a ?2 minimization. TiRiFiC is currently implemented as an add-on to the Groningen Image Processing System (GIPSY) software package and attempts to provide a method to automatically fit an extended tilted-ring model directly to a data cube.

Józsa, Gyula I. G.; Kenn, Franz; Oosterloo, Thomas A.; Klein, Ulrich

2012-08-01

401

Ringing in Your Ears?  

MedlinePLUS

... Ringing in Your Ears? Get the Buzz on Tinnitus Tinnitus is commonly described as a ringing in ... in Your Ears? Wise Choices Links What Causes Tinnitus? Several conditions can lead to tinnitus, including: Noise- ...

402

Rings in drugs.  

PubMed

We have analyzed the rings, ring systems, and frameworks in drugs listed in the FDA Orange Book to understand the frequency, timelines, molecular property space, and the application of these rings in different therapeutic areas and target classes. This analysis shows that there are only 351 ring systems and 1197 frameworks in drugs that came onto the market before 2013. Furthermore, on average six new ring systems enter drug space each year and approximately 28% of new drugs contain a new ring system. Moreover, it is very unusual for a drug to contain more than one new ring system and the majority of the most frequently used ring systems (83%) were first used in drugs developed prior to 1983. These observations give insight into the chemical novelty of drugs and potentially efficient ways to assess compound libraries and develop compounds from hit identification to lead optimization and beyond. PMID:24471928

Taylor, Richard D; MacCoss, Malcolm; Lawson, Alastair D G

2014-07-24

403

A new design equation for predicting the joint shear strength of monotonically loaded exterior beam-column joints  

Microsoft Academic Search

In this study a new design equation for predicting the shear strength of monotonically loaded exterior beam column joints is proposed. For this purpose, the influence of several key variables on the behaviour of beam-column joints are inspected using results of parametric studies on an experimental database compiled from a large number of exterior joint tests. The design equation suggested

P. G. Bakir; H. M. Boduro?lu

2002-01-01

404

NuSTAR Galactic Plane Survey and Galactic Binaries Program  

NASA Astrophysics Data System (ADS)

The NuSTAR Galactic science program includes a Galactic plane survey and observations of specific Galactic binaries. The survey includes a 2x0.8 degree field near Sgr A*, in which Chandra uncovered a large population of unidentified sources, possibly CVs. NuSTAR should detect hundreds of these sources in the hard X-ray band, helping identify their nature. A similar survey of the Norma region will be done for comparative studies. NuSTAR will observe Sgr A*, in coordination with Chandra and other observatories, to search for hard X-ray flaring. The same observations will provide an image of the central few tens of parsecs of the Galaxy with more than an order of magnitude better sensitivity than INTEGRAL. NuSTAR will spatially resolve the hard X-ray emission in the molecular cloud Sgr B2 to better understand its origin. An observation of the Limiting Window, which holds a possible new class of CVs, will yield information on their nature through the fraction of hard X-ray emitters. NuSTAR’s planned observation of the G2 molecular cloud - Sgr A* infall in the spring of 2013 will be discussed. Finally, with its superb hard X-ray sensitivity, NuSTAR will detect and map the low energy extension of the diffuse gamma-ray background observed by INTEGRAL, helping to resolve the long-standing mystery of the diffuse Galactic X-ray background. For Galactic binaries, NuSTAR's hard X-ray sensitivity will permit detailed studies of the fainter part of this population. NuSTAR will obtain the first hard X-ray measurements of black hole and neutron star transients in and approaching quiescence, providing new insights into how the X-ray emission is produced. NuSTAR will follow up on recently discovered types of High-Mass X-ray Binaries to search for pulsations, cyclotron lines, or spectral breaks, constraining the properties of their compact objects. We also plan to target gamma-ray binaries to understand whether the emission is powered by accretion or neutron star rotation. For bright X-ray binaries, we will use NuSTAR’s superb energy resolution at >10 keV to study cyclotron lines from accreting pulsars and to search for absorption edges in type I X-ray bursts that, if found, provide a new window on neutron star physics.

Hailey, Charles J.; NuSTAR Science Team

2013-01-01

405

Neptune - full ring system  

NASA Technical Reports Server (NTRS)

This pair of Voyager 2 images (FDS 11446.21 and 11448.10), two 591-s exposures obtained through the clear filter of the wide angle camera, show the full ring system with the highest sensitivity. Visible in this figure are the bright, narrow N53 and N63 rings, the diffuse N42 ring, and (faintly) the plateau outside of the N53 ring (with its slight brightening near 57,500 km).

1989-01-01

406

Bicycling black rings  

Microsoft Academic Search

We present detailed physics analyses of two different 4+1-dimensional asymptotically flat vacuum black hole solutions with spin in two independent planes: the doubly spinning black ring and the bicycling black ring system (``bi-rings''). The latter is a new solution describing two concentric orthogonal rotating black rings which we construct using the inverse scattering technique. We focus particularly on extremal zero-temperature

Henriette Elvang; Maria J. Rodriguez

2008-01-01

407

Exterior oblique detail view of typical slider windows at 3rd ...  

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

Exterior oblique detail view of typical slider windows at 3rd floor level on west side of Building 10, from balcony, looking east-northeast - North Beach Place, 501 Bay Street, 600 Francisco Street, 501 Bay Street, 600 Francisco Street, San Francisco, San Francisco County, CA

408

Exterior oblique view of typical 3rd floor balcony at west ...  

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

Exterior oblique view of typical 3rd floor balcony at west side and east end of Building 6, from landing of stair no. 1, looking south-southeast - North Beach Place, 401 Bay Street, 500 Francisco Street, 401 Bay Street, 500 Francisco Street, San Francisco, San Francisco County, CA

409

Exterior direct detail view of 3rd floor balcony on west ...  

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

Exterior direct detail view of 3rd floor balcony on west side of Building 10, looking south to north side of stair no. 12 - North Beach Place, 501 Bay Street, 600 Francisco Street, 501 Bay Street, 600 Francisco Street, San Francisco, San Francisco County, CA

410

1. EXTERIOR, OBLIQUE VIEW OF NORTH FRONT FACADES OF C.F. ...  

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

1. EXTERIOR, OBLIQUE VIEW OF NORTH FRONT FACADES OF C.F. WHEELER GROCERY, GARTON BAKERY AND CONFECTIONERY AND NIELSEN, GEHRKE AND HANSEN CLOTHING STORE (RIGHT TO LEFT) - East Locust Street Commercial District, 521-529 East Locust Street, Des Moines, Polk County, IA

411

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

412

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

413

The Moon's influence on the location of the Sun-Earth exterior libration point  

Microsoft Academic Search

If the Sun and Earth were isolated in space, the exterior libration point (Lz) of this two-body system would always lie on a line passing through their centers. However, it will be shown below that when the gravitational field of the Moon is taken into account, it is more accurate to place this point on a line that passes through

Robert W. Farquhar

1970-01-01

414

Infrared thermographic investigation procedures for four types of generic exterior wall assemblies  

NASA Astrophysics Data System (ADS)

Exterior wall assemblies that enclose medium to large buildings can be classified into four generic wall types: (1) masonry, (2) architectural precast, (3) metal and glass curtain wall, (4) insulated steel assemblies. Within these generic types of assemblies there are variations within the cladding type as well as assembly configuration. Investigations of exterior wall assemblies using infrared thermographic radiometers are carried out to obtain information related to: (1) moisture accumulation, (2) air leakage, (3) variations within thermal resistances of similar assembly configuration, and (4) structural thermal bridging. Each generic type of wall assembly is designed to perform in a different way and their use in various conditions are governed by their performance specification. The thermal patterns generated by each of these wall types is unique. The tolerances for error on each type of assembly varies. Therefore the inspection methodology for each type of wall assembly needs to be defined to isolate the specific performance parameters relevant to each wall assembly type. This paper identifies the various exterior wall assembly types, discusses the relevant performance parameters that make these assemblies perform properly and defines the inspection requirements necessary for accurate assessment of the deficiencies within the exterior wall enclosures of buildings.

Colantonio, Antonio

1999-03-01

415

BLDG 102, INTERIOR 2ND FLOOR FROM EXTERIOR STAIRWAY ENTRY, SHOWING ...  

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

BLDG 102, INTERIOR 2ND FLOOR FROM EXTERIOR STAIRWAY ENTRY, SHOWING ELEVATOR ON RIGHT AND ROOF LINE OF ONE STORY PORTION OF BUILDING ON BACK WALL. - Naval Magazine Lualualei, Headquarters Branch, Operational Storage Building, Fifteenth Street between Kolekole Road & Gilbert Street, Pearl City, Honolulu County, HI

416

In situ performance evaluation of spray polyurethane foam in the exterior insulation basement system (EIBS)  

Microsoft Academic Search

In 1995, a joint research project11The consortium included Canadian Plastics Industry Association, Expanded Polystyrene Association of Canada, Canadian Urethane Foam Contractors Association, Owens Corning Inc. and Roxul Inc. with the Institute for Research in Construction was initiated to assess the in situ thermal performance of a number of insulation products used as exterior basement insulation in contact with the ground.Sixteen

M. C. Swinton; W. Maref; M. T. Bomberg; M. K. Kumaran; N. Normandin

2006-01-01

417

Cluster observations of the exterior cusp and its surrounding boundaries under northward IMF  

Microsoft Academic Search

We have studied in detail multi-spacecraft observations of the exterior cusp on 04 February 2001, during a steady northward Interplanetary Magnetic Field (IMF) interval. At a radial distance of 11 Re, Cluster encountered a well-bounded region where the magnetic field exhibited very low diamagnetic values and the ions displayed high levels of isotropisation. We refer to this region as the

B. Lavraud; M. W. Dunlop; T. D. Phan; H. Rème; J.-M. Bosqued; I. Dandouras; J.-A. Sauvaud; R. Lundin; M. G. G. T. Taylor; P. J. Cargill; C. Mazelle; C. P. Escoubet; C. W. Carlson; J. P. McFadden; G. K. Parks; E. Moebius; L. M. Kistler; M.-B. Bavassano-Cattaneo; A. Korth; B. Klecker; A. Balogh

2002-01-01

418

Two-photon double ionization of H2 using exterior complex scaling  

SciTech Connect

We report converged calculations of fully, singly differential and total cross sections for two-photon double ionization of the hydrogen molecule in the range of 26-30 eV. These results have been obtained by using the method of exterior complex scaling combined with the use of DVR basis set.

Horner, Daniel A [Los Alamos National Laboratory; Morales, F [UNIV AUTONOMA DE MADRID; Martin, F [UNIV AUTONOMA DE MADRID; Rescigno, T N [LBNL; Mccurdy, C W [LBNL

2009-01-01

419

Durability and Related Tests for Selected Elements and Materials Used in the Exterior Envelope of Buildings.  

National Technical Information Service (NTIS)

This report contains a compendium of state-of-the-art methods to aid in the durability testing of selected elements and materials used in the exterior envelope of buildings. The purposes of the report are to identify currently available property measureme...

L. W. Masters E. J. Clark G. A. Sleater A. Hockman

1975-01-01

420

EXTERIOR VIEW LOOKING NORTH/NORTHEAST WITH PUMPHOUSE IN THE CENTER BACKGROUND. ...  

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

EXTERIOR VIEW LOOKING NORTH/NORTHEAST WITH PUMPHOUSE IN THE CENTER BACKGROUND. PIPING IN LEFT FOREGROUND CARRIES GAS FROM OTHER EQUITABLE FACILITIES THAT IS BEING PUMPED ALONG THE EQUITABLE SYSTEM BY THE BURNSVILLE STATION. - Burnsville Natural Gas Pumping Station, Saratoga Avenue between Little Kanawha River & C&O Railroad line, Burnsville, Braxton County, WV

421

Exterior view looking north/northeast with pumphouse in the center background. ...  

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

Exterior view looking north/northeast with pumphouse in the center background. Piping in left foreground carries gas from other equitable facilities that is being pumped along the equitable system by the Burnsville Station. - Burnsville Natural Gas Pumping Station, Saratoga Avenue between Little Kanawha River & C&O Railroad line, Burnsville, Braxton County, WV

422

The impact of exterior finish vapour resistance on the moisture state of building walls  

Microsoft Academic Search

At present, when the building walls covered with a painted thin render are insulated by the mineral wool slabs from outside, the defects caused by the condensed moisture accumulated in the envelopes become more and more frequent. Water vapour permeability of the exterior finish (ie the paint), if compared with the water vapour permeability of the mineral wool slab, is

Jolanta Šadauskiene; Edmundas Monstvilas; Vytautas Stankevi?ius

2007-01-01

423

THE IMPACT OF EXTERIOR FINISH VAPOUR RESISTANCE ON THE MOISTURE STATE OF BUILDING WALLS  

Microsoft Academic Search

At present, when the building walls covered with a painted thin render are insulated by the mineral wool slabs from outside, the defects caused by the condensed moisture accumulated in the envelopes become more and more frequent. Water vapour permeability of the exterior finish (ie the paint), if compared with the water vapour permeability of the mineral wool slab, is

ÛKIO TECHNOL

424

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

425

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

426

Investigation about the effects of exterior surface paint color on temperature development in aboveground pipeline  

Microsoft Academic Search

A practical analytical model for predicting temperature development of incompressible flow inside an aboveground pipeline has been constructed and presented in this research work. The outer surface of the pipeline is exposed to solar radiation and wind stream. The radiation heat exchange with ambient is also taken into account. The effects of exterior surface paint color represented by emissivity and

Mahmood Farzaneh-Gord; Alireza Rasekh; Amin Nabati; Morteza Saadat

2010-01-01

427

Investigation about the effects of exterior surface paint color on temperature development in aboveground pipeline  

Microsoft Academic Search

A practical analytical model for predicting temperature development of incompressible flow inside an aboveground pipeline has been constructed and presented in this research work. The outer surface of the pipeline is exposed to solar radiation and wind stream. The radiation heat exchange with ambient is also taken into account. The effects of exterior surface paint color represented by emissivity and

Mahmood Farzaneh-Gord; Alireza Rasekh; Amin Nabati; Morteza Saadat

428

Exterior detail direct view of typical entry steps (including 3story ...  

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

Exterior detail direct view of typical entry steps (including 3-story trash-dump tower) at east side of Building 7, looking south - North Beach Place, 431 Bay Street, 530 Francisco Street, 431 Bay Street, 530 Francisco Street, San Francisco, San Francisco County, CA

429

1. EAST SIDE/NORTH END EXTERIOR OF RUSH CREEK POWERHOUSE SHOWING ...  

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

1. EAST SIDE/NORTH END EXTERIOR OF RUSH CREEK POWERHOUSE SHOWING ROLLING METAL DOOR ON NORTH END, SWITCHRACKS NORTH OF POWERHOUSE AND WORKER COTTAGES IN COMPLEX. VIEW TO SOUTHWEST. - Rush Creek Hydroelectric System, Powerhouse Exciters, Rush Creek, June Lake, Mono County, CA

430

On the algebraic components of the SL(2, C ) character varieties of knot exteriors  

Microsoft Academic Search

We show that if a knot exterior satisfies certain conditions, then it has finite cyclic coverings with arbitrarily large numbers of nontrivial algebraic components in their SL(2,C) character varieties (Theorem A). As an example, these conditions hold for hyperbolic punctured torus bundles over the circle (Theorem B). We investigate in more detail the finite cyclic covers of the figure-eight knot

S. Boyer; E. Luft; X. Zhang

2002-01-01

431

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

432

INTEGRAL Galactic bulge monitoring program  

NASA Astrophysics Data System (ADS)

The central region of our Galaxy, the Galactic bulge, is a rich host of variable high-energy X-ray and gamma-ray point sources. These sources include bright and relatively faint X-ray transients, X-ray bursters, persistent neutron star and black-hole candidate binaries, high-mass X-ray binaries, etc.. We have a program to monitor the Galactic bulge region regularly and frequently with the gamma-ray observatory INTEGRAL, whenever it is observable. As a service to the scientific community the high-energy light curves of sources present, as well as the images of the region are made available through the WWW at http://integral.esac.esa.int/BULGE/ as soon as possible after the observations have been performed. We show the ongoing results of this exciting program.

Kuulkers, E.; et al.

2010-12-01

433

News from the Galactic Bulge  

NASA Astrophysics Data System (ADS)

The Galactic Bulge region is a rich host of variable high-energy X-ray and gamma-ray point sources. These sources include bright and relatively faint X-ray transients, X-ray bursters, persistent neutron star and black-hole candidate binaries, high-mass X-ray binaries, etc.. Since 2005 we have a program to monitor the Galactic Bulge region regularly and frequently with the gamma-ray observatory INTEGRAL. As a service to the scientific community the high-energy light curves of sources present are made available through the WWW. We show the ongoing results of this program showcasing more detailed results on some specific sources.

Kretschmar, Peter; Kuulkers, Erik; Paizis, A.; Chenevez, J.; Brandt, S.; Courvoisier, T.-J.-L.; Domingo, A.; Ebisawa, K.; Markwardt, C. B.; Oosterbroek, T.; Sanchez-Fernandez, C.; Wijnands, R.; Pottschmidt, K.; Bird, A. J.

434

Diameters of Galactic globular clusters  

SciTech Connect

All published aperture photometry of Galactic globular clusters has been used to derive total magnitudes, V(t), and values of the diameter containing half the cluster light in projection, D(0.5). For the 98 globulars for which this information is available, cluster diameter is found to correlate with Galactocentric distance. In this respect the Galactic globular cluster system resembles those associated with M31, NGC 5128, and the LMC, in which cluster diameters also increase with increasing Galactocentric distance. The observed correlation D(0.5) proportional to sq. rt R suggests that compact clusters formed preferentially from the dense gas clouds near the centers of galaxies, whereas more open clusters formed in the less dense halo regions of galaxies. Perhaps surprisingly, cluster diameter does not correlate with cluster luminosity (mass). Furthermore, cluster diameter does not appear to correlate with metallicity. 26 refs.

Van den bergh, S.; Morbey, C.; Pazder, J. (Dominion Astrophysical Observatory, Victoria (Canada) Victoria, University (Canada))

1991-07-01

435

Galactic and extragalactic star formation  

SciTech Connect

This book present new technology that allows the linking of the physics of local star forming regions to the global star forming properties of galaxies. Galactic star formation and examination of the processes of formation of nearby stars are addressed. Focus is on bipolar outflows and circumstellar disks. Larger scale phenomena in molecular clouds are then discussed, followed by reviews of star formation across the Milky Way.

Pudritz, R.E. (Minnesota Univ., Minneapolis, MN (USA). Heat Transfer Lab.); Fich, M. (Waterloo Univ., ON (Canada))

1988-01-01

436

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

437

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)

2007-01-23

438

Discovering New Galactic HII Regions  

NASA Astrophysics Data System (ADS)

We are finding a large population of previously unknown Galactic HII regions using the Green Bank Telescope at X-band to measure their recombination line emission. Our sources were selected based on coincident MIPSGAL 24 µm and VGPS 21cm continuum mission. In this pilot study we observed 83 targets, and nearly all (98%) were found to be HII regions based on the presence of recombination line emission. Since recombination lines are optically thin at 3 cm wavelength (X-band) we can see HII regions across the entire Galactic disk. Of these 80 newly detected HII regions, 8 have negative recombination line velocities, which places them outside the solar circle. We have found the distance to over 90% of these sources using the HI emission/absorption method with VGPS 21cm HI data. When completed this study will provide a complete census of all nebulae ionized by B0 stars within the solar circle in our target zone, doubling the number of known HII regions in this region. This will give a more accurate census of HII regions and their properties, provide a fair sampling of nebulae at all stages of their evolution, and increase our knowledge of Galactic structure.

Anderson, Loren D.; Bania, T. M.

2009-12-01

439

Galactic Neighborhood and Laboratory Astrophysics  

NASA Astrophysics Data System (ADS)

The galactic neighborhood, extending from the Milky Way to redshifts of about 0.1, is our unique local laboratory for detailed study of galaxies and their interplay with the environment. Such study provides a foundation of knowledge for interpreting observations of more distant galaxies and their environment. The Astro 2010 Science Frontier Galactic Neighborhood Panel identified four key sci- entific questions: 1) What are the flows of matter and energy in the circumgalac- tic medium? 2) What controls the mass-energy-chemical cycles within galaxies? 3) What is the fossil record of galaxy assembly from first stars to present? 4) What are the connections between dark and luminous matter? These questions, essential to the understanding of galaxies as interconnected complexes, can be addressed most effectively and/or uniquely in the galactic neighborhood. The panel also highlighted the discovery potential of time-domain astronomy and astrometry with powerful new techniques and facilities to greatly advance our understanding of the precise connections among stars, galaxies, and newly dis- covered transient events. The relevant needs for laboratory astrophysics will be emphasized, especially in the context of supporting NASA missions.

Wang, Q. D.

2011-05-01

440

New Developments in Galactic Archaeology  

NASA Astrophysics Data System (ADS)

The goal of Galactic Archaeology is to unravel observationally the events that occurred during the assembly of the Milky Way. For example, how did the star formation rate and the mass spectrum of the star-forming clusters change with time since the Galaxy began to form, how much did minor mergers and accretion of satellite galaxies contribute to the stellar content of the Galactic components, and how did the chemical properties of the Galaxy evolve? The data for Galactic Archaeology include the phase space coordinates of stars (position and velocity) and the chemical space coordinates (abundances of up to about 30 chemical elements). Although we know that the distribution of individual elements contains important information about the star formation history and chemical evolution of the Galaxy, the available data for large samples of stars has so far restricted the use of chemical space data mainly to the overall metallicity and the alpha-element enhancement. We are entering an era of large high-resolution spectroscopic surveys in which the abundances of many elements from all of the major nucleosynthesis processes will be measured. It will be possible to use chemical tagging techniques to identify the debris of individual dispersed star forming aggregates. In combination with astrometry from the Gaia mission, it will be possible to derive ages for this recovered star formation debris, and build up the star formation history of the regions of the Milky Way accessible to these large surveys. The Galactic thick disk is of particular interest. Because almost all disk galaxies appear to have an old thick disk, thick disks are an important but as yet poorly understood part of the formation process for disk galaxies. Some theories of thick disk formation associate the thick disk with the large star-bursting complexes seen in proto-disk galaxies at high redshift. If the Galactic thick disk was built in this way, from a relatively small number of large aggregates, it will be readily apparent from chemical tagging of the thick disk.

Freeman, Kenneth C.; HERMES/GALAH Team

2014-01-01

441

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.

442

Megamaser Disks in Active Galactic Nuclei  

NASA Astrophysics Data System (ADS)

Recent spectroscopic and VLBI-imaging observations of bright extragalactic H2O maser sources have revealed that the megamaser emission often originates in thin circumnuclear disks near the centers of active galactic nuclei (AGNs). Using general radiative and kinematic considerations and taking account of the observed flux variability, we argue that the maser emission regions are clumpy, a conclusion that is independent of the detailed mechanism (X-ray heating, shocks, etc.) driving the collisionally pumped masers. We examine scenarios in which the clumps represent discrete gas condensations (i.e., clouds) and do not merely correspond to velocity irregularities in the disk. We show that even two clouds that overlap within the velocity-coherence length along the line of sight could account (through self-amplification) for the entire maser flux of a high-velocity ``satellite'' feature in sources like NGC 4258 and NGC 1068, and we suggest that cloud self-amplification likely contributes also to the flux of the background-amplifying ``systemic'' features in these objects. Analogous interpretations have previously been proposed for water maser sources in Galactic star-forming regions. We argue that this picture provides a natural explanation of the time-variability characteristics of extragalactic megamaser sources and of their apparent association with Seyfert 2-like galaxies. We also show that the requisite cloud space densities and internal densities are consistent with the typical values of nuclear (broad emission line region type) clouds. We examine two scenarios of clumpy disks in which the maser emission is excited by a central continuum source. This excitation mechanism was first considered in the context of megamaser disks by Neufeld & Maloney, but our proposed models are clearly distinct from their warped, homogeneous disk interpretation. In our first scenario we consider an annular disk (or ``ring'') whose inner edge corresponds to the innermost radius of the observed maser distribution and whose mass is dominated by the clumped, high-density gas component. The shielding of the high-energy continuum, which is required in order that the gas remain molecular, can be provided in this case by the dusty clouds themselves. We show that even the simplest version of this model, in which the disk is flat and the continuum radiation reaches the masing clouds through the plane of the disk, can account for the maser observations in NGC 1068. We point out the striking similarities between the maser ring properties as interpreted with this model and the inferred characteristics of the circumnuclear disk in the Galactic center, and we briefly discuss the implications of such rings for the AGN accretion disk paradigm. Our second scenario is motivated by the apparent warps observed in some of the imaged megamaser disks and by our finding that the flat-disk version of the irradiated ring scenario could apply to a source like NGC 4258 only if the water abundance in the masing clouds were higher than the value implied by equilibrium photoionization-driven chemistry. This scenario is based on the disk-driven hydromagnetic wind model originally proposed to account for the molecular ``tori'' in Seyfert 2-like galaxies and for several other observed phenomena in AGNs. In this picture, the wind uplifts (by its ram pressure) and confines (by its magnetic pressure) dense clouds fragmented from the disk, which mase after they become exposed to the central radiation field. Much of the requisite continuum shielding can be provided in this case by the dusty portions of the wind. We show that comparatively massive clouds that move in low-altitude, nearly circular orbits could be shielded in this way, and we suggest that an apparent warp in the maser distribution might arise under these circumstances from an observational selection effect induced by the strong vertical density stratification that characterizes a centrifugally driven wind. We construct a self-contained illustrative model where the wind transports the bulk of the disk angular mom

Kartje, John F.; Königl, Arieh; Elitzur, Moshe

1999-03-01

443

SAS-2 galactic gamma ray results, 1  

NASA Technical Reports Server (NTRS)

Continuing analysis of the data from the SAS-2 high energy gamma-ray experiment has produced an improved picture of the sky at photon energies above 35 MeV. On a large scale, the diffuse emission from the galactic plane is the dominant feature observed by SAS-2. This galactic plane emission is most intense between galactic longitude 310 and 45 deg, corresponding to a region within 7kpc of the galactic center. Within the high-intensity region, SAS-2 observes peaks around galactic longitudes 315 deg, 330 deg, 345 deg, 0 deg, and 35 deg. These peaks appear to be correlated with such galactic features and components as molecular hydrogen, atomic hydrogen, magnetic fields, cosmic ray concentrations, and photon fields.

Thompson, D. J.; Fichtel, C. E.; Hartman, R. C.; Kniffen, D. A.; Bignami, G. F.; Lamb, R. C.; Oegelman, H.; Oezel, M. E.; Tuemer, T.

1976-01-01

444

Hypernovae as Possible Sources of Galactic Positrons  

Microsoft Academic Search

INTEGRAL\\/SPI has recently observed a strong and extended emission resulting from electron-positron annihilation located in the Galactic center region, consistent with the Galactic bulge geometry, without a high energy gamma-ray counterpart, nor in the 1809 keV 26 Al decay line. In order to explain the rate of positron injection in the Galactic bulge, estimated to more than 1043 s-1 ,

Stephane Schanne; Michel Casse; Bertrand Cordier; Jacques Paul

2004-01-01

445

Atomic Hydrogen in a Galactic Center Outflow  

NASA Astrophysics Data System (ADS)

We describe a population of small, high-velocity, atomic hydrogen clouds, loops, and filaments found above and below the disk near the Galactic center. The objects have a mean radius of 15 pc, velocity widths of ~14 km s-1, and are observed at |z| heights up to 700 pc. The velocity distribution of the clouds shows no signature of Galactic rotation. We propose a scenario where the clouds are associated with an outflow from a central star-forming region at the Galactic center. We discuss the clouds as entrained material traveling at ~200 km s-1 in a Galactic wind.

McClure-Griffiths, N. M.; Green, J. A.; Hill, A. S.; Lockman, F. J.; Dickey, J. M.; Gaensler, B. M.; Green, A. J.

2013-06-01

446

ATOMIC HYDROGEN IN A GALACTIC CENTER OUTFLOW  

SciTech Connect

We describe a population of small, high-velocity, atomic hydrogen clouds, loops, and filaments found above and below the disk near the Galactic center. The objects have a mean radius of 15 pc, velocity widths of {approx}14 km s{sup -1}, and are observed at |z| heights up to 700 pc. The velocity distribution of the clouds shows no signature of Galactic rotation. We propose a scenario where the clouds are associated with an outflow from a central star-forming region at the Galactic center. We discuss the clouds as entrained material traveling at {approx}200 km s{sup -1} in a Galactic wind.

McClure-Griffiths, N. M.; Green, J. A.; Hill, A. S. [Australia Telescope National Facility, CSIRO Astronomy and Space Science, Marsfield, NSW 2122 (Australia); Lockman, F. J. [National Radio Astronomy Observatory, Green Bank, WV 24944 (United States); Dickey, J. M. [School of Physics and Mathematics, University of Tasmania, TAS 7001 (Australia); Gaensler, B. M.; Green, A. J., E-mail: naomi.mcclure-griffiths@csiro.au [Sydney Institute for Astronomy, School of Physics, The University of Sydney, NSW 2006 (Australia)

2013-06-10

447

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

448

THE GALACTIC CENTER: NOT AN ACTIVE GALACTIC NUCLEUS  

SciTech Connect

We present 10 {mu}m-35 {mu}m Spitzer spectra of the interstellar medium in the Central Molecular Zone (CMZ), the central 210 pc Multiplication-Sign 60 pc of the Galactic center (GC). We present maps of the CMZ in ionic and H{sub 2} emission, covering a more extensive area than earlier spectroscopic surveys in this region. The radial velocities and intensities of ionic lines and H{sub 2} suggest that most of the H{sub 2} 0-0 S(0) emission comes from gas along the line-of-sight, as found by previous work. We compare diagnostic line ratios measured in the Spitzer Infrared Nearby Galaxies Survey to our data. Previous work shows that forbidden line ratios can distinguish star-forming galaxies from low-ionization nuclear emission-line regions (LINERs) and active galactic nuclei (AGNs). Our GC line ratios agree with star-forming galaxies and not with LINERs or AGNs.

An, Deokkeun [Department of Science Education, Ewha Womans University, Seoul 120-750 (Korea, Republic of); Ramirez, Solange V. [NASA Exoplanet Science Institute, California Institute of Technology, Mail Stop 100-22, Pasadena, CA 91125 (United States); Sellgren, Kris, E-mail: deokkeun@ewha.ac.kr [Department of Astronomy, Ohio State University, 140 West 18th Avenue, Columbus, OH 43210 (United States)

2013-06-01

449

VLT Observations of Galactic Microquasars  

NASA Astrophysics Data System (ADS)

We report the results of VLT observations at 2.2 ?m with the ISAAC instrument of the galactic microquasars GRS 1915+105 and 1E 1740.7-2942. For GRS1915+105, we report the detection of a new Na I emission line and discuss the different scenarii consistent with the observed spectrum. For 1E 1740.7-2942, we present a deep VLT search for its infrared counterpart at the subarcsec accurate position determined by both the Very Large Array and the Chandra satellite at radio and X-ray wavelengths, respectively.

Martí, Josep; Mirabel, I. Félix; Chaty, Sylvain; Rodríguez, Luis F.

450

Slowing of Vortex Rings  

NASA Astrophysics Data System (ADS)

We have investigated the slowing of vortex rings in water which are created with very thin cores. We find that these rings propagate with no measurable change in diameter or core size. The drag appears to be the result of viscous forces on the core. A simple model for this drag describes experimental data in terms of a drag coefficient, which depends only on Reynolds number. Barenghi's group at Newcastle found that the translational velocity of a ring in an inviscid fluid perturbed by Kelvin waves decreases with increasing amplitude of Kelvin waves. This suggests that the velocity of vortex rings in a viscous fluid may well depend on the amplitude of Kelvin waves at the time of formation. Rings with substantial amplitude of Kelvin waves will be expected to move more slowly than rings with little or no Kelvin wave amplitude. We present experimental data confirming this suggestion.

Donnelly, Russell; Bolster, Diogo; Hershberger, Robert

2008-11-01

451

A study of one-dimensional transport of Bose-Einstein condensates using exterior complex scaling  

NASA Astrophysics Data System (ADS)

We numerically investigate the one-dimensional transport of Bose-Einstein condensates in the context of guided atom lasers using a mean-field description of the condensate in terms of a spatially discretized Gross-Pitaevskii equation. We specifically consider a waveguide configuration in which spatial inhomogeneities and nonvanishing atom-atom interactions are restricted to a spatially localized scattering region of finite extent. We show how the method of smooth exterior complex scaling can be implemented for this particular configuration in order to efficiently absorb the outgoing flux within the waveguide. A numerical comparison with the introduction of a complex absorbing potential as well as with the analytically exact elimination of the dynamics of the free non-interacting motion outside the scattering region, giving rise to transparent boundary conditions, clearly confirms the accuracy and efficiency of the smooth exterior complex scaling method.

Dujardin, Julien; Saenz, Alejandro; Schlagheck, Peter

2014-04-01

452

Piezoelectric slotted ring transducer.  

PubMed

Analytical treatment of a slotted piezoelectric ceramic ring transducer vibrating in flexure is presented. The mode shape of the slotted ring vibration is determined, and parameters of the equivalent electromechanical circuit of the transducer are calculated. Possibilities to optimize the effective electromechanical coupling coefficient of the transducer by combining active and passive materials are considered. Acoustic loading for typical projectors made from slotted rings is estimated. Challenges in implementing the slotted ring transducers in terms of depth limitation and radiated power are discussed. PMID:23742342

Aronov, Boris S

2013-06-01

453

Reverberation Time Measurements in the NASA Langley Exterior Effects Room (EER)  

NASA Technical Reports Server (NTRS)

One-third octave band background noise and reverberation time measurements were conducted in the Exterior Effect Room (EER) at the NASA Langley Research Center. The related overall acoustic absorption of the room was calculated. The acoustic field in the room was characterized. Reverberation time measurements were performed using the integrated impulse response method. The results were compared with independent measurements using the interrupted noise reverberation time method and different instrumentation. Reasonable agreement was obtained between the reverberation times of the two methods.

Grosveld, Ferdinand W.

2006-01-01

454

Influence of biocide pre-treatment of wood on performance of exterior coatings  

Microsoft Academic Search

Summaries  Exterior coatings may not provide sufficient protection of wood against biodeterioration. In order to minimise the decay risk,\\u000a wood can be impregnated with biocides before finishing. However, pretreatment of wood may have an effect on some important\\u000a properties of surface coatings. The authors impregnated spruce wood specimens with a new preservative formulation, containing\\u000a the ester of boric acid with an

M Pavlic; B Kricej; M Tomazic; M Petric

2005-01-01

455

Enhancing exterior performance of clear coatings through photostabilization of wood. Part 2: coating and weathering performance  

Microsoft Academic Search

Clear-coated boards have not been recommended for use in exterior conditions since irradiation with visible and UV radiation\\u000a darkens them and photodegrades the lignin in the wooden surface beneath the coating, leading to delamination and subsequent\\u000a catastrophic coating failure due to the continued action of sun, rain, and biological factors. Many approaches to rectify\\u000a this problem have been explored. Chemical

Bernard S. W. Dawson; Adya P. Singh; Hank W. Kroese; Michael A. Schwitzer; Suzanne Gallagher; Stephen J. Riddiough; Shuhong Wu

2008-01-01

456

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

457

Reinforced Concrete Exterior Waffle Flat Plate-Column Connections Subjected to Lateral Earthquake Loading  

Microsoft Academic Search

An experimental investigation of an exterior waffle flat plate-column connection subjected to combined gravity and cyclic lateral loading is presented. The test model was designed according to construction practices used over ten years ago in the Mediterranean area. Test results are discussed in conjunction with previous studies on flat-slab connections and ACI 318–05 code idealizations. The specimen exhibited a “strong

A. Benavent-Climent; X. Cahis; A. Catalan

2009-01-01

458

Three-dimensional analysis of thermal resistance of exterior basement insulation systems (EIBS)  

Microsoft Academic Search

A consortium11The consortium included the Expanded Polystyrene Association of Canada, the Canadian Urethane Foam Contractors Association, Owens Corning Inc. and Roxul Inc. research project was initiated to determine the field performance of various thermal insulation products as applied in the exterior insulation basement system (EIBS). Initially a two-dimensional (2-D) analytical tool was used to derive the thermal transmission characteristics from

W. Maref; M. C. Swinton; M. K. Kumaran; M. T. Bomberg

2001-01-01

459

FUNDAMENTAL AREAS OF PHENOMENOLOGY (INCLUDING APPLICATIONS): Numerical Simulation of Electromagnetic Waves Scattering by Discrete Exterior Calculus  

NASA Astrophysics Data System (ADS)

We show how to construct discrete Maxwell equations by discrete exterior calculus. The new scheme has many virtues compared to the traditional Yee's scheme: it is a multisymplectic scheme and keeps geometric properties. Moreover, it can be applied on triangular mesh and thus is more adaptive to handle domains with irregular shapes. We have implemented this scheme on a Java platform successfully and our experimental results show that this scheme works well.

Ye, Zheng; Xie, Zheng; Ma, Yu-Jie

2009-08-01

460

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

461

Flight test measurement of exterior turbulent boundary layer pressure fluctuations on Boeing model 737 airplane  

Microsoft Academic Search

The exterior pressure fluctuation measurements were carried out on Boeing model 737 airplane in two separate flight tests. A seven-microphone array was used at two different locations along the fuselage. The measurements were carried out for Mach numbers of 0.78, 0.6 and 0.45 for the forward location, and for Mach numbers of 0.78 and 0.45 for the aft location. The

W. V. Brat

1971-01-01

462

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

463

Effectiveness of Horizontal Stirrups in Joint Core for Exterior Beam-Column Joints with Nonseismic Design  

Microsoft Academic Search

Reversed cyclic-load tests on full-scale reinforced concrete exterior beam-column joints with nonseismic design to the British standard BS 8110 were carried out. The seismic behaviour of these non-seismically designed beamcolumn joints was investigated, and the effectiveness of horizontal stirrups in joint core on the seismic performance and shear strength of the joints were emphasised. It was found that horizontal stirrups

J. S. Kaung; H. F. Wong

2011-01-01

464

4. EXTERIOR OF SOUTH END OF BUILDING 103 SHOWING 1LIGHT ...  

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

4. EXTERIOR OF SOUTH END OF BUILDING 103 SHOWING 1-LIGHT SIDE EXIT DOOR AND ORIGINAL WOOD-FRAMED SLIDING GLASS KITCHEN WINDOWS AT PHOTO LEFT, CRISS-CROSS WOOD BALUSTRADE AROUND FRONT PORCH WITH OPEN DOOWAY TO BASEMENT BENEATH, AND STONE FACING ALONG ORIGINAL PORTION OF HOUSE FRONT AT PHOTO RIGHT. VIEW TO WEST. - Rush Creek Hydroelectric System, Worker Cottage, Rush Creek, June Lake, Mono County, CA

465

ON THE ALGEBRAIC COMPONENTS OF THE SL(2,C) CHARACTER VARIETIES OF KNOT EXTERIORS  

Microsoft Academic Search

We show that if a knot exterior satisfies certain conditions, then it has finite cyclic coverings with arbitrarily large numbers of nontrivial algebraic components in their SL2(C)-character varieties (Theorem A). As an example, these conditions hold for hy- perbolic punctured torus bundles over the circle (Theorem B). We investigate in more detail the finite cyclic covers of the figure-eight knot

S. BOYER; E. LUFT; X. ZHANG

466

Chemical and dynamical evolution of galactic discs  

NASA Technical Reports Server (NTRS)

The relative roles of star formation and viscously-induced radial flows in galactic disks are discussed. It is shown that the present-day distributions of stars, gas, and metals in galactic spirals need not reflect initial conditions but may instead indicate a cooperation between star forming and viscous processes over the disk lifetime.

Clarke, Catherine J.

1989-01-01

467

A CATALOG OF GALACTIC INFRARED CARBON STARS  

SciTech Connect

We collected almost all of the Galactic infrared carbon stars (IRCSs) from literature published up to the present to organize a catalog of 974 Galactic IRCSs in this paper. Some of their photometric properties in the near-, mid-, and far-infrared are discussed.

Chen, P. S. [National Astronomical Observatories/Yunnan Observatory and Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650011 (China); Yang, X. H., E-mail: iraspsc@yahoo.com.cn, E-mail: yangxh@cqu.edu.cn [Department of Physics, Chongqing University, Chongqing 400044 (China)

2012-02-15

468

Mass Distributions Implying Flat Galactic Rotation Curves  

ERIC Educational Resources Information Center

The rotational speeds of stars in the disc of a spiral galaxy are virtually independent of the distances of the stars from the centre of the galaxy. In common parlance, the stellar speed versus distance plot known as a galactic rotation curve is by observation typically nearly flat. This observation provides strong evidence that most galactic

Keeports, David

2010-01-01

469

Galactic Variable Sky with EGRET and GLAST  

NASA Astrophysics Data System (ADS)

The characteristics of the largely-unidentified Galactic sources of gamma rays that were detected by EGRET are reviewed. Proposed source populations that may have the correct spatial, spectral, luminosity, and variability properties to be the origins of the EGRET sources are also presented. Finally, the prospects for studying Galactic gamma-ray sources with the GLAST LAT are reviewed.

Digel, S. W.

2007-10-01

470

Viscous models for slowly evolving galactic disks  

Microsoft Academic Search

We present a basic family of galactic disk evolutionary models bearing in mind three fundamental questions: i) to what extent does the present cosmological frame offer the natural initial conditions for galactic formation and evolution, ii) what is the relevance of gas hydrodynamics in determining the present physical conditions of disk galaxies and iii) how does the wide variety of

C. Firmani; X. Hernandez; J. Gallagher

1996-01-01

471

Models of galactic disks with axisymmetry  

Microsoft Academic Search

The paper develops models of galactic disks which are thin, self-gravitating, axisymmetric, and in strong differential rotation. The angular velocity and the density of the disks are chosen empirically on the basis of rotation curves and mass distribution curves, respectively, of spiral galaxies. The galactic potential, the gravitational forces, and the velocity dispersions are determined by numerical integration of the

E. van Humbeeck

1976-01-01

472

Hydrodynamical description of Galactic Dark Matter  

Microsoft Academic Search

We consider simple hydrodynamical models of galactic dark matter in which the galactic halo is a self-gravitating and self-interacting gas that dominates the dynamics of the galaxy. Modeling this halo as a sphericaly symmetric and static perfect fluid satisfying the field equations of General Relativity, visible barionic matter can be treated as ``test particles'' in the geometry of this field.

Luis G. Cabral-Rosetti; Dario Nunez; Roberto A. Sussman; Tonatiuh Matos

2002-01-01

473

Diffuse galactic gamma ray lines  

NASA Technical Reports Server (NTRS)

The origin and observability were studied of diffuse gamma ray line emission from the galaxy. It was found that such lines could be formed by nuclear excitation interactions of low energy cosmic rays with both interstellar gas and dust grains. The gamma ray emission lines from deexcitation of grain nuclei are sharp with Doppler widths of the order of 10 kev or less; the lines from gas nuclei are also relatively sharp with widths of the order of 100 kev for the most intense line; and the lines from cosmic ray nuclei are broad with widths of the order of several hundred kev. A detailed evaluation is presented of the production rate of the 4.44 Mev line for a variety of assumed cosmic ray spectra. Results are compared with reported galactic gamma ray line intensities and it is concluded that the measurements are consistent with a low energy cosmic ray density which increases toward the galactic center in proportion to the molecular gas density.

Lingenfelter, R. E.; Ramaty, R.

1976-01-01

474

Lithium production in galactic flybys  

NASA Astrophysics Data System (ADS)

Unlike 7Li plateau which is expected but observed at a level that is difficult to explain, 6Li observations in low-metallicity halo stars also reveal a plateau which is completely unexpected within the standard picture of 6Li origin in galactic cosmic-ray (GCR) interactions. This indicates the existence of a new Li source, however all considered sources (e.g. supernovae, shocks due to structure-formation etc.) either completely fail to explain the observed abundance or require some fine-tuning. Here we present another possible source of lithium - cosmic rays that arise due to galactic flybys. Gravitational interaction between two galaxies flying by each other could result in large-scale tidal shocks that would give rise to a new cosmic-ray population - tidal cosmic rays. Such cosmic-ray population would increase the 6Li (and 7Li) abundance, but not be accompanied with increase in metallicity or gas content. The details, of course, depend on interacting galaxies. Our preliminary results presented here demonstrate that this could be an important source of lithium in some sites, such is the Small Magellanic Cloud which has experienced close encounters with the Large Magellanic Cloud and the Milky Way during its history.

Prodanovi?, T.; Bogdanovi?, T.; Uroševi?, D.

475

Chemical complexity in galactic nuclei  

NASA Astrophysics Data System (ADS)

In recent years our knowledge of the chemical complexity in the nuclei of galaxies has dramatically changed. Recent observations of the nucleus of the Milky Way, of the starburst galaxy NGC253 and of the ultraluminous infrared galaxy (ULIRG) Arp220 have shown large abundance of complex organic molecules believed to be formed on grains. The Galactic center appears to be the largest repository of complex organic molecule like aldehydes and alcohols in the galaxy. We also measure large abundance of methanol in starburst galaxies and in ULIRGs suggesting that complex organic molecules are also efficiently produced in the central region of galaxies with strong star formation activity. From the systematic observational studies of molecular abundance in regions dominated by different heating processes like shocks, UV radiation, X-rays and cosmic rays in the center of the Milky Way, we are opening the possibility of using chemistry as a diagnostic tool to study the highly obscured regions of galactic centers. The templates found in the nucleus of the Milky Way will be used to establish the main mechanisms driving the heating and the chemistry of the molecular clouds in galaxies with different type of activity. The role of grain chemistry in the chemical complexity observed in the center of galaxies will be also briefly discussed.

Martin-Pintado, Jesus

2007-12-01

476

Special Features of Galactic Dynamics  

NASA Astrophysics Data System (ADS)

This is an introductory article to some basic notions and currently open problems of galactic dynamics. The focus is on topics mostly relevant to the so-called `new methods' of celestial mechanics or Hamiltonian dynamics, as applied to the ellipsoidal components of galaxies, i.e., to the elliptical galaxies and to the dark halos and bulges of disk galaxies. Traditional topics such as Jeans theorem, the role of a `third integral' of motion, Nekhoroshev theory, violent relaxation, and the statistical mechanics of collisionless stellar systems are first discussed. The emphasis is on modern extrapolations of these old topics. Recent results from orbital and global dynamical studies of galaxies are then shortly reviewed. The role of various families of orbits in supporting self-consistency, as well as the role of chaos in galaxies, are stressed. A description is then given of the main numerical techniques of integration of the N-body problem in the framework of stellar dynamics and of the results obtained via N-Body experiments. A final topic is the secular evolution and self-organization of galactic systems.

Efthymiopoulos, Christos; Voglis, Nikos; Kalapotharakos, Constantinos

477

Hydrodynamics of galactic dark matter  

NASA Astrophysics Data System (ADS)

We consider simple hydrodynamical models of galactic dark matter in which the galactic halo is a self-gravitating and self-interacting gas that dominates the dynamics of the galaxy. Modelling this halo as a spherically symmetric and static perfect fluid satisfying the field equations of general relativity, visible baryonic matter can be treated as 'test particles' in the geometry of this field. We show that the assumption of an empirical 'universal rotation curve' that fits a wide variety of galaxies is compatible, under suitable approximations, with state variables characteristic of a non-relativistic Maxwell Boltzmann gas that becomes an isothermal sphere in the Newtonian limit. Consistency criteria lead to a minimal bound for particle masses in the range 30 eV < m < 60 eV and to a constraint between the central temperature and the particle mass. The allowed mass range includes popular supersymmetric particle candidates, such as the neutralino, axino and gravitino, as well as lighter particles (mapprox keV) proposed by numerical n-body simulations associated with self-interactive CDM and WDM structure formation theories.

Cabral-Rosetti, Luis G.; Matos, Tonatiuh; Nuñez, Darío; Sussman, Roberto A.

2002-07-01

478

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

479

Inverse scattering for an exterior Dirichlet problem. [due to metallic cylinder  

NASA Technical Reports Server (NTRS)

Scattering caused by a metallic cylinder in the field of a wire carrying a periodic current is studied, with a view to determining the location and shape of the cylinder in light of far field measurements between the cylinder and the wire. The associated direct problem is the exterior Dirichlet problem for the Helmholtz equation in two dimensions, and an improved low frequency estimate for its solution by integral equation methods is shown by inverse scattering calculations to be accurate to this estimate. The far field measurements are related to low frequency boundary integral equations whose solutions may be expressed in terms of a mapping function for the exterior of the unknown curve onto the exterior of a unit disk. The conformal transformation's Laurent expansion coefficients can be related to those of the far field, the first of which leads to the calculation of the distance between the source and the cylinder, while the other coefficients are determined by placing the source in a different location.

Hariharan, S. I.

1982-01-01

480

The MSX Galactic Plane Survey : A Cinematic Overview  

NASA Astrophysics Data System (ADS)

The Galactic Plane Survey by the SPIRIT III telescope aboard the Midcourse Space Experiment (MSX) imaged the entire Galactic plane for |b| < 5 degrees in five mid-infrared passbands between 4 and 26 ? m. The resolution of the survey is 18 arcseconds and the sensitivity is comparable to or better than previous mid-infrared surveys. The MSX Galactic plane survey is the highest resolution full survey of the plane in the mid-infrared. In anticipation of the upcoming public release of the data, we present an overview of the results of this survey in the form of a three-color movie of the plane. The three colors correspond to MSX band A (6.8 - 10.8 ? m = blue), the sum of MSX bands C and D (11.1 - 16.9 ? m = green) and band E (18.2 - 25.1 ? m = red). Visible in the movie are numerous rings, filaments and shells due to star forming regions, supernova remants, circumstellar shells and planetary nebula. Also distinguishable are patches which are dark in the mid-infrared. These objects are now known to be large, cold molecular cores. The entire plane is pervaded by diffuse emission in Band A most likely due to cationic PAHs. Changes in dust properties and excitation are evident in the color variations color in the movie. In addition to being a unique dataset, this data will undoubtably be useful in interpretating ISO investigations in the plane and for preparing future observations with SIRTF and SOFIA.

Price, S. D.; Egan, M. P.; Mizuno, D. R.; Kuchar, T. A.; Carey, S. J.

1999-12-01

481

RE-EXAMINING LARSON'S SCALING RELATIONSHIPS IN GALACTIC MOLECULAR CLOUDS  

SciTech Connect

The properties of Galactic molecular clouds tabulated by Solomon et al. (SRBY) are re-examined using the Boston University-FCRAO Galactic Ring Survey of {sup 13}CO J = 1-0 emission. These new data provide a lower opacity tracer of molecular clouds and improved angular and spectral resolution compared with previous surveys of molecular line emission along the Galactic Plane. We calculate giant molecular cloud (GMC) masses within the SRBY cloud boundaries assuming local thermodynamic equilibrium (LTE) conditions throughout the cloud and a constant H{sub 2} to {sup 13}CO abundance, while accounting for the variation of the {sup 12}C/{sup 13}C with galactocentric radius. The LTE-derived masses are typically five times smaller than the SRBY virial masses. The corresponding median mass surface density of molecular hydrogen for this sample is 42 M{sub sun} pc{sup -2}, which is significantly lower than the value derived by SRBY (median 206 M{sub sun} pc{sup -2}) that has been widely adopted by most models of cloud evolution and star formation. This discrepancy arises from both the extrapolation by SRBY of velocity dispersion, size, and CO luminosity to the 1 K antenna temperature isophote that likely overestimates the GMC masses and our assumption of constant {sup 13}CO abundance over the projected area of each cloud. Owing to the uncertainty of molecular abundances in the envelopes of clouds, the mass surface density of GMCs could be larger than the values derived from our {sup 13}CO measurements. From velocity dispersions derived from the {sup 13}CO data, we find that the coefficient of the cloud structure functions, v{sup 0} = {sigma}{sub v}/R {sup 1/2}, is not constant, as required to satisfy Larson's scaling relationships, but rather systematically varies with the surface density of the cloud as {approx}{sigma}{sup 0.5} as expected for clouds in self-gravitational equilibrium.

Heyer, Mark; Krawczyk, Coleman [Department of Astronomy, University of Massachusetts, Amherst, MA 01003-9305 (United States); Duval, Julia; Jackson, James M. [Institute for Astrophysical Research, Boston University, Boston, MA 02215 (United States)], E-mail: heyer@astro.umass.edu

2009-07-10

482

The Population of Propellers in Saturn's A Ring  

NASA Astrophysics Data System (ADS)

We present an extensive data set of ~150 localized features from Cassini images of Saturn's A ring, a third of which are demonstrated to be persistent by their appearance in multiple images, and half of which are resolved well enough to reveal a characteristic "propeller" shape. We interpret these features as the signatures of small moonlets embedded within the ring, with diameters between 40 and 500 m. The lack of significant brightening at high phase angle indicates that they are likely composed primarily of macroscopic particles, rather than dust. With the exception of two features found exterior to the Encke Gap, these objects are concentrated entirely within three narrow (~1000 km) bands in the mid-A ring that happen to be free from local disturbances from strong density waves. However, other nearby regions are similarly free of major disturbances but contain no propellers. It is unclear whether these bands are due to specific events in which a parent body or bodies broke up into the current moonlets, or whether a larger initial moonlet population has been sculpted into bands by other ring processes.

Tiscareno, Matthew S.; Burns, Joseph A.; Hedman, Matthew M.; Porco, Carolyn C.

2008-03-01

483

Is the galactic corona produced by galactic flares?  

NASA Technical Reports Server (NTRS)

The effect of the differential rotation of the disk of the Galaxy on magnetic field which penetrates the disk is considered. The magnetic field will be progressively distorted from a potential (current-free) form and will at some stage become unstable. It is expected that an MHD instability, a resistive instability, or a combination of the two, will result in the release of the excess magnetic energy and that part of the released energy will be converted into heat. By estimating the energy release and the rate at which this process will occur and by assuming that this energy input is balanced by radiation, estimates were obtained of the parameters of the resulting plasma. It appears that this process alone can heat a galactic corona to temperatures of order 10 to the 6th power K.

Sturrock, P. A.; Stern, R.

1979-01-01

484

Survival After Total Body Irradiation: Effects of Irradiation of Exteriorized Small Intestine. (Reannouncement with New Availability Information).  

National Technical Information Service (NTIS)

Rats receiving lethal irradiation to their exteriorized small intestine with pulsed 18 MVp bremsstrahlung radiation live about 4 days longer than rats receiving a dose of total-body irradiation (TBI) causing intestinal death. The LD50 for intestinal irrad...

H. M. Vriesendorp R. M. Vigneulle G. Kitto T. Pelky P. Taylor

1993-01-01

485

The galactic habitable zone of the Milky Way and M31 from chemical evolution models with gas radial flows  

NASA Astrophysics Data System (ADS)

The galactic habitable zone is defined as the region with sufficient abundance of heavy elements to form planetary systems in which Earth-like planets could be born and might be capable of sustaining life, after surviving to close supernova explosion events. Galactic chemical evolution models can be useful for studying the galactic habitable zones in different systems. We apply detailed chemical evolution models including radial gas flows to study the galactic habitable zones in our Galaxy and M31. We compare the results to the relative galactic habitable zones found with `classical' (independent ring) models, where no gas inflows were included. For both the Milky Way and Andromeda, the main effect of the gas radial inflows is to enhance the number of stars hosting a habitable planet with respect to the `classical' model results, in the region of maximum probability for this occurrence, relative to the classical model results. These results are obtained by taking into account the supernova destruction processes. In particular, we find that in the Milky Way the maximum number of stars hosting habitable planets is at 8 kpc from the Galactic Centre, and the model with radial flows predicts a number which is 38 per cent larger than what was predicted by the classical model. For Andromeda we find that the maximum number of stars with habitable planets is at 16 kpc from the centre and that in the case of radial flows this number is larger by 10 per cent relative to the stars predicted by the classical model.

Spitoni, E.; Matteucci, F.; Sozzetti, A.

2014-05-01

486

Ring Bar Grizzly.  

National Technical Information Service (NTIS)

The patent application relates to a ring bar grizzly used as a materials handling device to enable the jam-free transfer of loose rocks or other materials at the discharge end of a generally horizontal conveyor. Normally, this ring bar grizzly is used in ...

A. T. Fisk

1980-01-01

487

Smoke Ring Physics  

ERIC Educational Resources Information Center

The behavior of smoke rings, tornados, and quantized vortex rings in superfluid helium has many features in common. These features can be described by the same mathematics we use when introducing Ampere's law in an introductory physics course. We discuss these common features. (Contains 7 figures.)

Huggins, Elisha

2011-01-01

488

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, ...

489

Schatzki ring, statistically reexamined.  

PubMed

In the article by Schatzki published in 1963, data about the lower esophageal ring relate ring diameter to presence of dysphagia. Statistical analysis of these measurements was performed to quantify conclusions of Schatzki and to extract additional information from the data. Ring diameters in 332 patients with and without dysphagia are described in a histogram in the original article of Schatzki. Data were evaluated with analysis of variance, logistic regression, and receiver operating characteristic (ROC) analysis to quantify the relationship between ring diameter and dysphagia. Follow-up information was available in 36 symptomatic and 30 asymptomatic patients of Schatzki. Logistic regression indicated that there was a highly significant difference in ring diameter between the asymptomatic group and patients with recurrent dysphagia (P <.001) but not in patients who had a single episode of dysphagia at presentation (P =.229). Odds ratio of 0.686 indicated that a 1-mm increase in ring diameter decreased the likelihood of dysphagia by 31%; conversely, a 1-mm decrease in ring diameter increased the likelihood of dysphagia by 46%. ROC curve of sensitivity and specificity of ring diameter and symptoms showed that the 20-mm cutoff of Schatzki had a 96% (104 of 108) sensitivity and a 58% (130 of 224) specificity, with area under the ROC curve of 0.888. Retrospective statistical analysis of original data of Schatzki validated his major conclusions about the data. Some important questions remain unanswered because of missing data in the study of Schatzki. PMID:12869689

Pezzullo, John C; Lewicki, Ann M

2003-09-01

490

Illustration of Saturn's Rings  

NASA Technical Reports Server (NTRS)

This illustration shows a close-up of Saturn's rings. These rings are thought to have formed from material that was unable to form into a Moon because of tidal forces from Saturn, or from a Moon that was broken up by Saturn's tidal forces.

2001-01-01

491

Neptune's ring system.  

NASA Astrophysics Data System (ADS)

The authors review the current state of knowledge regarding the structure, particle properties, kinematics, dynamics, origin, and evolution of the Neptune rings derived from Earth-based and Voyager data. Neptune has a diverse system of five continuous rings - 2 broad (Galle and Lassell) and 3 narrow (Adams, Le Verrier, and Arago) - plus a narrow discontinuous ring sharing the orbit of one of its ring-region satellites, Galatea. The outermost Adams ring contains the only arcs observed so far in Voyager images. The five arcs vary in angular extent from ?1° to ?10°, and exhibit internal azimuthal structure with typical spatial scales of ?0.5°. All five lie within ?40° of longitude. Dust is present throughout the Neptune system and measureable quantities of it were detected over Neptune's north pole. The Adams ring (including the arcs) and the Le Verrier ring contain a significant fraction of dust. The Neptune ring particles are probably red, and may consist of ice "dirtied" with silicates and/or some carbon-bearing material. A kinematic model for the arcs derived from Voyager data, the arcs' physical characteristics, and their orbital geometry and phasing are all roughly in accord with single-satellite arc shepherding by Galatea, though the presence of small kilometer-sized bodies embedded either within the arcs or placed at their Lagrange points may explain some inconsistencies with this model.

Porco, C. C.; Nicholson, P. D.; Cuzzi, J. N.; Lissauer, J. J.; Esposito, L. W.

492

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

493

Linac ring collider  

Microsoft Academic Search

The collision of a linear accelerator electron beam with a particle beam stored in a ring allows center of mass energies and luminosities beyond those achievable in pure storage ring colliders. The constraints of such a collider scheme and the unusual beam-beam interaction scenario with a highly disrupted electron beam are discussed. Machine parameters for a high luminosity B factory

P. Grosse Wiesmann

1991-01-01

494

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

495

Liquid Metal Slip Ring.  

National Technical Information Service (NTIS)

A liquid metal slip ring is described which comprises a rotor in the form of a ring about an axis and a stator. The rotor is rotatable relative to the stator and has a channel in which the liquid metal is retained during operation by surface tension. The ...

F. D. Berkopec R. R. Lovell D. H. Culp

1976-01-01

496

Contactless Magnetic Slip Ring  

NASA Technical Reports Server (NTRS)

A contactless magnetic slip ring is disclosed having a primary coil and a secondary coil. The primary and secondary coils are preferably magnetically coupled together, in a highly reliable efficient manner, by a magnetic layered core. One of the secondary and primary coils is rotatable and the contactless magnetic slip ring provides a substantially constant output.

Kumagai, Hiroyuki (Inventor); Deardon, Joe D. (Inventor)

1997-01-01

497

Grafting polymer nanoshell onto the exterior surface of mesoporous silica nanoparticles via surface reversible addition-fragmentation chain transfer polymerization  

Microsoft Academic Search

Reversible addition-fragmentation chain transfer (RAFT) functionalities were anchored to the exterior surface of mesoporous silica nanoparticles (MSNs) without changing the mesoporous structure, RAFT polymerization of styrene was subsequently conducted to graft polystyrene (PSt) onto the exterior surface of MSNs, forming a novel core–shell nanostructure with a mesoporous core and a polymer nanoshell. Fourier transform infrared spectroscopy (FT-IR), high-resolution transmission electron

Chun-Yan Hong; Xin Li; Cai-Yuan Pan

2007-01-01

498

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

499

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

500

Obtaining Approximate Values of Exterior Orientation Elements of Multi-Intersection Images Using Particle Swarm Optimization  

NASA Astrophysics Data System (ADS)

In this paper, an efficient global optimization algorithm in the field of artificial intelligence, named Particle Swarm Optimization (PSO), is introduced into close range photogrammetric data processing. PSO can be applied to obtain the approximate values of exterior orientation elements under the condition that multi-intersection photography and a small portable plane control frame are used. PSO, put forward by an American social psychologist J. Kennedy and an electrical engineer R.C. Eberhart, is a stochastic global optimization method based on swarm intelligence, which was inspired by social behavior of bird flocking or fish schooling. The strategy of obtaining the approximate values of exterior orientation elements using PSO is as follows: in terms of image coordinate observed values and space coordinates of few control points, the equations of calculating the image coordinate residual errors can be given. The sum of absolute value of each image coordinate is minimized to be the objective function. The difference between image coordinate observed value and the image coordinate computed through collinear condition equation is defined as the image coordinate residual error. Firstly a gross area of exterior orientation elements is given, and then the adjustment of other parameters is made to get the particles fly in the gross area. After iterative computation for certain times, the satisfied approximate values of exterior orientation elements are obtained. By doing so, the procedures like positioning and measuring space control points in close range photogrammetry can be avoided. Obviously, this method can improve the surveying efficiency greatly and at the same time can decrease the surveying cost. And during such a process, only one small portable control frame with a couple of control points is employed, and there are no strict requirements for the space distribution of control points. In order to verify the effectiveness of this algorithm, two experiments are carried out. In the first experiment, images of a standard grid board are taken according to multi-intersection photography using digital camera. Three points or six points which are located on the left-down corner of the standard grid are regarded as control points respectively, and the exterior orientation elements of each image are computed through PSO, and compared with these elements computed through bundle adjustment. In the second experiment, the exterior orientation elements obtained from the first experiment are used as approximate values in bundle adjustment and then the space coordinates of other grid points on the board can be computed. The coordinate difference of grid points between these computed space coordinates and their known coordinates can be used to compute the accuracy. The point accuracy computed in above experiments are ±0.76mm and ±0.43mm respectively. The above experiments prove the effectiveness of PSO used in close range photogrammetry to compute approximate values of exterior orientation elements, and the algorithm can meet the requirement of higher accuracy. In short, PSO can get better results in a faster, cheaper way compared with other surveying methods in close range photogrammetry.

Li, X.; Li, S. W.

2012-07-01