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1

HUBBLE REVEALS ULTRAVIOLET GALACTIC RING  

NASA Technical Reports Server (NTRS)

The appearance of a galaxy can depend strongly on the color of the light with which it is viewed. The Hubble Heritage image of NGC 6782 illustrates a pronounced example of this effect. This spiral galaxy, when seen in visible light, exhibits tightly wound spiral arms that give it a pinwheel shape similar to that of many other spirals. However, when the galaxy is viewed in ultraviolet light with NASA's Hubble Space Telescope, its shape is startlingly different. Ultraviolet light has a shorter wavelength than ordinary visible light, and is emitted from stars that are much hotter than the Sun. At ultraviolet wavelengths, which are rendered as blue in the Hubble image, NGC 6782 shows a spectacular, nearly circular bright ring surrounding its nucleus. The ring marks the presence of many recently formed hot stars. Two faint, dusty spiral arms emerge from the outer edge of the blue ring and are seen silhouetted against the golden light of older and fainter stars. A scattering of blue stars at the outer edge of NGC 6782 in the shape of two dim spiral arms shows that some star formation is occurring there too. The inner ring surrounds a small central bulge and a bar of stars, dust, and gas. This ring is itself part of a larger dim bar that ends in these two outer spiral arms. Astronomers are trying to understand the relationship between the star formation seen in the ultraviolet light and how the bars may help localize the star formation into a ring. NGC 6782 is a relatively nearby galaxy, residing about 183 million light-years from Earth. The light from galaxies at much larger distances is stretched to longer, redder wavelengths ['redshifted'], due to the expansion of the universe. This means that if astronomers want to compare visible-light images of very distant galaxies with galaxies in our own neighborhood, they should use ultraviolet images of the nearby ones. Astronomers find that the distant galaxies tend to have different structures than nearby ones, even when they use the correct procedure of comparing visible light in distant galaxies with ultraviolet light from nearby ones. Since the distant galaxies are seen as they were billions of years ago, such observations are evidence that galaxies evolve with time. The Hubble image of NGC 6782 was taken with the Wide Field Planetary Camera 2 (WFPC2) in June 2000 as part of an ultraviolet survey of 37 nearby galaxies. The observations were carried out by an international 'Hubble mid-UV team' led by Dr. Rogier Windhorst of Arizona State University. Additional observations of NGC 6782 were made by the Hubble Heritage Team in June 2001. The color image was produced by combining data from both observing programs that were taken through color filters in the WFPC2 camera that isolated ultraviolet, blue, visible, and infrared light. Credits: NASA and The Hubble Heritage Team (STScI/AURA) Acknowledgment: R. Windhorst (ASU)

2002-01-01

2

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

Microsoft Academic Search

The Boston University--Five College Radio Astronomy Observatory (BU-FCRAO) Galactic Ring Survey (GRS) is a new survey of 13CO (1--0) emission covering Galactic longitudes 18 deg < l < 55.7 deg and Galactic latitudes |b| < 1 deg. Using the SEQUOIA array on the FCRAO 14m telescope, the GRS fully sampled the 13CO Galactic emission (46 arcsec angular resolution on a

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

2005-01-01

3

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

4

A 100-parsec elliptical and twisted ring of cold and dense molecular clouds revealed by Herschel around the Galactic Center  

E-print Network

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 3x10^7 solar masses 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 parsecs is deduced. The major axis of this 100-pc ring is inclined by about 40 degrees 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_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; Noriega-Crespo, A; Compiègne, M; Bernard, J P; Paradis, D; Martin, P; Testi, L; Barlow, M; Moore, T; Plume, R; Swinyard, B; Zavagno, A; Calzoletti, L; Di Giorgio, A M; Elia, D; Faustini, F; Natoli, P; Pestalozzi, M; Pezzuto, S; Piacentini, F; Polenta, G; Polychroni, D; Schisano, E; Traficante, A; Veneziani, M; Battersby, C; Burton, M; Carey, S; Fukui, Y; Li, J Z; Lord, S D; Morgan, L; Motte, F; Schuller, F; Stringfellow, G S; Tan, J C; Thompson, M A; Ward-Thompson, D; White, G; Umana, G

2011-01-01

5

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

6

A 100 pc Elliptical and Twisted Ring of Cold and Dense Molecular Clouds Revealed by Herschel Around the Galactic Center  

Microsoft Academic Search

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 ~3 × 107 M 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

S. Molinari; J. Bally; A. Noriega-Crespo; M. Compiègne; J. P. Bernard; D. Paradis; P. Martin; L. Testi; M. Barlow; T. Moore; R. Plume; B. Swinyard; A. Zavagno; L. Calzoletti; A. M. Di Giorgio; D. Elia; F. Faustini; P. Natoli; M. Pestalozzi; S. Pezzuto; F. Piacentini; G. Polenta; D. Polychroni; E. Schisano; A. Traficante; M. Veneziani; C. Battersby; M. Burton; S. Carey; Y. Fukui; J. Z. Li; S. D. Lord; L. Morgan; F. Motte; F. Schuller; G. S. Stringfellow; J. C. Tan; M. A. Thompson; D. Ward-Thompson; G. White; G. Umana

2011-01-01

7

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

SciTech Connect

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

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

2013-09-20

8

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

E-print Network

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

Nathan Smith

2007-05-21

9

28. EXTERIOR CAN CONVEYOR Exterior section of empty can ...  

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

28. EXTERIOR - CAN CONVEYOR Exterior section of empty can conveyor which transported cans from the third floor of the main warehouse (right) to the canning area. - Hovden Cannery, 886 Cannery Row, Monterey, Monterey County, CA

10

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

11

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

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

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

12

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

13

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

SciTech Connect

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

Krol, V.A.

1984-01-01

14

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

NASA Astrophysics Data System (ADS)

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

Kang, Sung-Ju; Kerton, Charles R.

2015-01-01

15

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

Federal Register 2010, 2011, 2012, 2013, 2014

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

2010-06-16

16

Planetary Rings  

NASA Astrophysics Data System (ADS)

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 elegant examples of Lindblad and corotation resonances (first invoked in the context of galactic disks), electromagnetic resonances, spiral density waves and bending waves, narrow ringlets which exhibit internal modes due to collective instabilities, sharp-edged gaps maintained via tidal torques from embedded moonlets, and tenuous dust belts created by meteoroid impact onto, or collisions between, parent bodies. Yet, as far as we have come, our understanding is far from complete. The fundamental questions confronting ring scientists at the beginning of the twenty-first century are those regarding the origin, age and evolution of the various ring systems, in the broadest context. Understanding the origin and age requires us to know the current ring properties, and to understand the dominant evolutionary processes and how they influence ring properties. Here we discuss a prioritized list of the key questions, the answers to which would provide the greatest improvement in our understanding of planetary rings. We then outline the initiatives, missions, and other supporting activities needed to address those questions, and recommend priorities for the coming decade in planetary ring science.

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

2002-08-01

17

Finite element exterior calculus, homological techniques,  

E-print Network

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

Wardetzky, Max

18

Exterior differentials in superspace and Poisson brackets  

NASA Astrophysics Data System (ADS)

It is shown that two definitions for an exterior differential in superspace, giving the same exterior calculus, yet lead to different results when applied to the Poisson bracket. A prescription for the transition with the help of these exterior differentials from the given Poisson bracket of definite Grassmann parity to another bracket is introduced. It is also indicated that the resulting bracket leads to generalization of the Schouten-Nijenhuis bracket for the cases of superspace and brackets of diverse Grassmann parities. It is shown that in the case of the Grassmann-odd exterior differential the resulting bracket is the bracket given on exterior forms. The above-mentioned transition with the use of the odd exterior differential applied to the linear even/odd Poisson brackets, that correspond to semi-simple Lie groups, results, respectively, in also linear odd/even brackets which are naturally connected with the Lie superalgebra. The latter contains the BRST and anti-BRST charges and can be used for calculation of the BRST operator cogomology.

Soroka, Dmitrij V.; Soroka, Vyacheslav A.

2003-03-01

19

Evaluation of commercially available exterior digital VMDs  

SciTech Connect

This paper discusses the highlights from the full report, `Evaluation of Commercially Available Exterior Digital VMDs`, Charles E. Ringler, Chris E. Hoover, SAND94-2875, on the testing and evaluation of thirteen commercially available exterior digital video motion detection (VMD) systems. The systems were evaluated for use in a specific perimeter outdoor application. The full report focuses primarily on the testing parameters, each system`s advertised features, and the nuisance alarm and detection test results; this paper will summarize the nuisance alarm and detection test results and present some conclusions from the tests.

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

1996-06-01

20

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

21

Evaluation of commercially available exterior digital VMDs  

SciTech Connect

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

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

1995-06-01

22

Jupiter's 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 (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.

A faint mist of particles can be seen above and below the main rings; this vertically extended, toroidal 'halo' is unusual in planetary rings, and is probably caused by electromagnetic forces which can push small grains out of the ring plane. Halo material is present across this entire image, implying that it reaches more than 27,000 km above the ring plane. Because of shadowing, the halo is not visible close to Jupiter in the lower right part of the mosaic. In order to accentuate faint features in the image, different brightnesses are shown through color, with the brightest being white or yellow and the faintest purple.

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

23

EXTERIOR, A view looking east at the west elevation of ...  

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

EXTERIOR, A view looking east at the west elevation of the building, including an exterior staircase that leads to the roof - Department of Energy, Mound Facility, Hydrolysis House Building (HH Building), One Mound Road, Miamisburg, Montgomery County, OH

24

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

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

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

25

Planetary Rings  

NASA Astrophysics Data System (ADS)

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

Esposito, Larry W.

2011-07-01

26

Collar nut and thrust ring  

DOEpatents

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, Guy B. (Aiken, SC)

1991-01-01

27

Mobile exterior gateway protocol: extending IP scalability  

Microsoft Academic Search

The mobile exterior gateway protocol (EGP) extends the two-tier hierarchical network concepts inherent within OSPF and IS-IS in order to create N-tier autonomous systems. It introduces the concept of an aggregated area border router (A-ABR), which behaves like traditional OSPF ABRst except that A-ABRs link together former autonomous systems (ASes) into an aggregated AS structure. These aggregated ASes can communicate

Eric Fleischman; Wojtek Furmanski

2005-01-01

28

Excavationless Exterior Foundation Insulation Exploratory Study  

SciTech Connect

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

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

2013-02-01

29

Excavationless Exterior Foundation Insulation Field Study  

SciTech Connect

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

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

2014-10-01

30

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

31

Exact vacuum solution to conformal Weyl gravity and galactic rotation curves  

NASA Technical Reports Server (NTRS)

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

Mannheim, Philip D.; Kazanas, Demosthenes

1989-01-01

32

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

33

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

34

Adaptive Boundary Conditions for Exterior Flow Problems  

NASA Astrophysics Data System (ADS)

We consider the problem of solving numerically the stationary incompressible Navier Stokes equations in an exterior domain in two dimensions. This corresponds to studying the stationary fluid flow past a body. The necessity to truncate for numerical purposes the infinite exterior domain to a finite domain leads to the problem of finding appropriate boundary conditions on the surface of the truncated domain. We solve this problem by providing a vector field describing the leading asymptotic behavior of the solution. This vector field is given in the form of an explicit expression depending on a real parameter. We show that this parameter can be determined from the total drag exerted on the body. Using this fact we set up a self-consistent numerical scheme that determines the parameter, and hence the boundary conditions and the drag, as part of the solution process. We compare the values of the drag obtained with our adaptive scheme with the results from using traditional constant boundary conditions. Computational times are typically reduced by several orders of magnitude.

Bönisch, Sebastian; Heuveline, Vincent; Wittwer, Peter

2005-03-01

35

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

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

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

36

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

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

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

37

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

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

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

38

Galactic Winds  

NASA Astrophysics Data System (ADS)

Galactic winds have become arguably one of the hottest topics in extragalactic astronomy. This enthusiasm for galactic winds is due in part to the detection of winds in many, if not most, high-redshift galaxies. Galactic winds have also been invoked by theorists to (1) suppress the number of visible dwarf galaxies and avoid the "cooling catastrophe" at high redshift that results in the overproduction of massive luminous galaxies, (2) remove material with low specific angular momentum early on and help enlarge gas disks in CDM + baryons simulations, (3) reduce the dark mass concentrations in galaxies, (4) explain the mass-metallicity relation of galaxies from selective loss of metal-enriched gas from smaller galaxies, (5) enrich and "preheat" the ICM, (6) enrich the IGM without disturbing the Ly?forest significantly, and (7) inhibit cooling flows in galaxy clusters with active cD galaxies. The present paper highlights a few key aspects of galactic winds taken from a recent ARAA review by Veilleux, Cecil, &Bland-Hawthorn (2005; herafter VCBH). Readers interested in a more detailed discussion of this topic are encouraged to refer to the original ARAA article.

Veilleux, Sylvain

39

A Panoramic View of the Monoceros Ring  

NASA Astrophysics Data System (ADS)

The study of Galactic structure is a prime case where surveys covering a substantial fraction of the entire sky are of critical importance. In particular, previous surveys like SDSS have detected a ring-like structure in the vicinity of the outer Galactic disk known as the Monoceros ring, but the lack of imaging throughout the disk has limited our understanding of its true size, structure, and origin. With Pan-STARRS1 we are able to present a panoramic view of the Monoceros Ring, demonstrating its extent on both the northern and southern sides of the Galactic plane up to substantial heights of 20-30 degrees in Galactic latitude and covering nearly 130 degrees in Galactic longitude. The feature exhibits complex stream-like structures and sharp edges that are substantially unlike smooth models of the disk. To guide our understanding of the morphology we present a comparison to two N-body simulations, one where tidal debris from an accreted dwarf forms the Monoceros Ring and another where a dwarf disrupts the Galactic disk and produces structures at high latitude. These simulations broadly illustrate the link between possible formation mechanisms and the resulting morphological features, further guiding our understanding of the ring's origin.

Slater, Colin; Bell, E. F.; Schlafly, E.; Morganson, E.; Martin, N.; Rix, H.; Pan-STARRS1 Consortium, The

2014-01-01

40

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

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

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

41

17. DETAIL OF INTERIOR AND EXTERIOR WALL CONSTRUCTION, VIEW TOWARD ...  

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

17. DETAIL OF INTERIOR AND EXTERIOR WALL CONSTRUCTION, VIEW TOWARD NORTHEAST CORNER, THIRD BAY Showing insulated exterior wall at right; asphalt felt on interior separation wall at left; sill beam, stud, and concrete foundation detailing of interior wall. - U.S. Military Academy, Ice House, Mills Road at Howze Place, West Point, Orange County, NY

42

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

43

Vortex rings  

Microsoft Academic Search

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

Karim Shariff; Anthony Leonard

1992-01-01

44

Autonomous navigation for structured exterior environments  

SciTech Connect

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

Pletta, J B

1993-12-01

45

88. EXTERIOR VIEW, SOUTH SIDE, SHOWING 1883 FARM ADDITION (BACKGROUND), ...  

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

88. EXTERIOR VIEW, SOUTH SIDE, SHOWING 1883 FARM ADDITION (BACKGROUND), AND BLACKSMITH SHOP ADDITION OF 1905. SMALL STRUCTURE ON RIGHT IS AN OUTHOUSE. - Gruber Wagon Works, Pennsylvania Route 183 & State Hill Road at Red Bridge Park, Bernville, Berks County, PA

46

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

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

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

47

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

48

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

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

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

49

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

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

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

50

3. BUILDING 901, EXTERIOR DETAILING ON NORTH SIDE SHOWING CONCRETE ...  

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

3. BUILDING 901, EXTERIOR DETAILING ON NORTH SIDE SHOWING CONCRETE FOUNDATION AND METAL TERMITE SHIELD. - Presidio of San Francisco, Warehouse, West End of Crissy Field, Livingston Street, San Francisco, San Francisco County, CA

51

Detail, exterior side of doubleplanked north end, Burton Park Club ...  

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

Detail, exterior side of double-planked north end, Burton Park Club House, view to south-southwest (135mm lens). - Burton Park, Club House & Amphitheater, Adjacent ot south end of Chestnut Avenue, San Carlos, San Mateo County, CA

52

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

53

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

54

7. EXTERIOR SOUTHEAST SIDE DETAIL VIEW, FACING SOUTHWEST. BUILDINGS 101, ...  

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

7. EXTERIOR SOUTHEAST SIDE DETAIL VIEW, FACING SOUTHWEST. BUILDINGS 101, 278 AND CANOPY 685 DETAILED. - NASA Industrial Plant, Missile Research Laboratory, 12214 Lakewood Boulevard, Downey, Los Angeles County, CA

55

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

56

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

57

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

58

2. EXTERIOR VIEW TO THE NORTH OF WATER FILTERING EQUIPMENT ...  

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

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

59

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

60

1. EXTERIOR VIEW TO THE NORTHEAST OF A BROCK HOUSE ...  

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

1. EXTERIOR VIEW TO THE NORTHEAST OF A BROCK HOUSE USED FOR THE WATER FILTERING SYSTEM. - Nevada Test Site, Pluto Facility, Water Filtering System Brock House, Area 26, Wahmonie Flats, Cane Spring Road, Mercury, Nye County, NV

61

Transverse electromagnetic horn antenna with resistively-loaded exterior surfaces  

SciTech Connect

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, J.F.

1999-09-28

62

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

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

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

63

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

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

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

64

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

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

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

65

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

66

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

67

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

68

EXTERIOR VIEW, POWELL AVENUE (SOUTH) ELEVATION, PEDESTRIAN PASSAGEWAY AT LEFT ...  

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

EXTERIOR VIEW, POWELL AVENUE (SOUTH) ELEVATION, PEDESTRIAN PASSAGEWAY AT LEFT SIDE OF UNDERPASS - Twentieth Street Underpass, At Railroad Reservation, Twentieth Street at the Tracks between Morris & Powell Avenues, Birmingham, Jefferson County, AL

69

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

70

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

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

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

71

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

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

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

72

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

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

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

73

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

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

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

74

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

75

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

76

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

77

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

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

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

78

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

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

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

79

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

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

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

80

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

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

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

81

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

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

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

82

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

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

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

83

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

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

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

84

2. EXTERIOR VIEW OF WEST FACADE OF CENTRAL HANGAR. ...  

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

2. EXTERIOR VIEW OF WEST FACADE OF CENTRAL HANGAR. - Wright-Patterson Air Force Base, Area B, Building 4, Modification Hangar & Flight Research Lab, South end of flightline between Thirteenth Street & Loop Road, Dayton, Montgomery County, OH

85

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

86

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

87

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

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

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

88

45. EXTERIOR VIEW, GREEN SWITCH TOLWER, COS COB, SHOWING BARS ...  

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

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

89

12. DETAIL EXTERIOR VIEW LOOKING SOUTHWEST, SHOWING CONTROL TOWER AT ...  

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

12. DETAIL EXTERIOR VIEW LOOKING SOUTHWEST, SHOWING CONTROL TOWER AT SOUTH END OF DAM/SPILLWAY; ENTRANCE TO BRADFORD ISLAND FISH LADDER IS VISIBLE IN FOREGROUND. - Bonneville Project, Bonneville Dam, Columbia River, Bonneville, Multnomah County, OR

90

25. GENERAL EXTERIOR VIEW LOOKING WEST, SHOWING FISH LADDER DOWNSTREAM ...  

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

25. GENERAL EXTERIOR VIEW LOOKING WEST, SHOWING FISH LADDER DOWNSTREAM FROM THE DAM/SPILLWAY ON THE WASHINGTON SHORE. - Bonneville Project, Bonneville Dam, Columbia River, Bonneville, Multnomah County, OR

91

17. GENERAL EXTERIOR VIEW LOOKING NORTHEAST, SHOWING FISH LADDER ON ...  

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

17. GENERAL EXTERIOR VIEW LOOKING NORTHEAST, SHOWING FISH LADDER ON BRADFORD ISLAND; VIEW IS TAKEN FROM ROOF OF POWERHOUSE #1; THE DAM/SPILLWAY IS IN RIGHT BACKGROUND. - Bonneville Project, Bonneville Dam, Columbia River, Bonneville, Multnomah County, OR

92

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

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

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

93

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

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

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

94

Exterior building details of Building B, east façade: ca. 1914 ...  

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

Exterior building details of Building B, east façade: ca. 1914 covered porch with an asphalt singled low-hipped roof; southwesterly view - San Quentin State Prison, Building 22, Point San Quentin, San Quentin, Marin County, CA

95

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

96

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

97

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

98

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

99

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

100

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

101

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

102

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

103

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

104

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

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

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

105

5. Historic American Buildings Survey Photocopy of Exterior Photo c. ...  

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

5. Historic American Buildings Survey Photocopy of Exterior Photo c. 1930 Gilman Collection of Cambridge Photographs, Now at Cambridge Historical Commission, 57 Inman Street, Cambridge - John Fiske House, 22 Berkeley Street, Cambridge, Middlesex County, MA

106

5. Historic American Buildings Survey Photocopy of undated exterior photograph ...  

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

5. Historic American Buildings Survey Photocopy of undated exterior photograph showing ORIGINAL TRIM AND ROOF LINE OF REAR ELL Original in collection of SPNEA, 141 Cambridge Street, Boston. - Arthur Astor Carey House, 28 Fayerweather Street, Cambridge, Middlesex County, MA

107

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

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

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

108

18. GENERAL EXTERIOR VIEW LOOKING NORTHEAST, SHOWING FISH LADDER ON ...  

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

18. GENERAL EXTERIOR VIEW LOOKING NORTHEAST, SHOWING FISH LADDER ON BRADFORD ISLAND; DAM/SPILLWAY IS VISIBLE IN CENTER BACKGROUND. - Bonneville Project, Bonneville Dam, Columbia River, Bonneville, Multnomah County, OR

109

EXTERIOR, A view looking northwest from far hill toward the ...  

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

EXTERIOR, A view looking northwest from far hill toward the Mounds complex and the HH Building - Department of Energy, Mound Facility, Hydrolysis House Building (HH Building), One Mound Road, Miamisburg, Montgomery County, OH

110

EXTERIOR, A view looking southeast toward the north elevation of ...  

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

EXTERIOR, A view looking southeast toward the north elevation of the building including the dock and overhead piping and stacks - Department of Energy, Mound Facility, Hydrolysis House Building (HH Building), One Mound Road, Miamisburg, Montgomery County, OH

111

EXTERIOR, A view looking west that captures the east elevation ...  

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

EXTERIOR, A view looking west that captures the east elevation of the building with parking lot to the right - Department of Energy, Mound Facility, Hydrolysis House Building (HH Building), One Mound Road, Miamisburg, Montgomery County, OH

112

EXTERIOR, A view looking northeast toward the south elevation and ...  

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

EXTERIOR, A view looking northeast toward the south elevation and stacks of HH Building - Department of Energy, Mound Facility, Hydrolysis House Building (HH Building), One Mound Road, Miamisburg, Montgomery County, OH

113

EXTERIOR, A close up view, looking southeast at the dock ...  

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

EXTERIOR, A close up view, looking southeast at the dock and overhead piping - Department of Energy, Mound Facility, Hydrolysis House Building (HH Building), One Mound Road, Miamisburg, Montgomery County, OH

114

EXTERIOR, A view looking northeast at the south and west ...  

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

EXTERIOR, A view looking northeast at the south and west facades of the building and staircase - Department of Energy, Mound Facility, Hydrolysis House Building (HH Building), One Mound Road, Miamisburg, Montgomery County, OH

115

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

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

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

116

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

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

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

117

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

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

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

118

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

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

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

119

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

120

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

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

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

121

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

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

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

122

EXTERIOR OBLIQUE VIEW FACING FRONT AND SIDE. VIEW FACING NORTHEAST. ...  

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

EXTERIOR OBLIQUE VIEW FACING FRONT AND SIDE. VIEW FACING NORTHEAST. - U.S. Naval Base, Pearl Harbor, Naval Housing Area Hospital Point, Quarters for Officer in Charge of Radio Station, 1 Ford Island Way, Pearl City, Honolulu County, HI

123

EXTERIOR OBLIQUE VIEW OF REAR AND SIDE. VIEW FACING SOUTHWEST. ...  

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

EXTERIOR OBLIQUE VIEW OF REAR AND SIDE. VIEW FACING SOUTHWEST. - U.S. Naval Base, Pearl Harbor, Naval Housing Area Hospital Point, Quarters for Officer in Charge of Radio Station, 1 Ford Island Way, Pearl City, Honolulu County, HI

124

EXTERIOR OBLIQUE VIEW OF REAR AND SIDE. VIEW FACING NORTHWEST. ...  

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

EXTERIOR OBLIQUE VIEW OF REAR AND SIDE. VIEW FACING NORTHWEST. - U.S. Naval Base, Pearl Harbor, Naval Housing Area Hospital Point, Quarters for Officer in Charge of Radio Station, 1 Ford Island Way, Pearl City, Honolulu County, HI

125

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

126

1. T12, exterior overall view, looking north. Thallheimer Whiteman ...  

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

1. T-12, exterior overall view, looking north. Thallheimer - Whiteman Air Force Base, Minuteman Missile Launch Facility Trainer T-12, Northeast of Oscar-01 Missile Alert Facility, Knob Noster, Johnson County, MO

127

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

128

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

129

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

130

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

131

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

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

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

132

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

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

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

133

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

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

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

134

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

135

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

136

4. Exterior, detail south elevation, showing jointing of logs on ...  

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

4. Exterior, detail south elevation, showing jointing of logs on later extension. Sept. 12, 1940. Mixon. - Upper Swedish Log Cabin, Darby Creek vicinity, Clifton Heights (Upper Darby Township), Darby, Delaware County, PA

137

3. Exterior, detail view of north elevation, from northeast, showing ...  

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

3. Exterior, detail view of north elevation, from northeast, showing joint of addition. Sept. 12, 1940. Mixon. - Upper Swedish Log Cabin, Darby Creek vicinity, Clifton Heights (Upper Darby Township), Darby, Delaware County, PA

138

2. Exterior, general view of rear and end, from west. ...  

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

2. Exterior, general view of rear and end, from west. Sept. 12, 1940. Photo by Stanly P. Mixon. - Upper Swedish Log Cabin, Darby Creek vicinity, Clifton Heights (Upper Darby Township), Darby, Delaware County, PA

139

Exterior overall oblique view of the northeast and southeast sides ...  

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

Exterior overall oblique view of the northeast and southeast sides - U.S. Naval Base, Pearl Harbor, Scrap Metal Packaging Facility, Seventh Street between Facility Nos. 6 & 247, Pearl City, Honolulu County, HI

140

Exterior view of the southwest side, taken from Facility No. ...  

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

Exterior view of the southwest side, taken from Facility No. 247 with Facility No. 6 beyond - U.S. Naval Base, Pearl Harbor, Scrap Metal Packaging Facility, Seventh Street between Facility Nos. 6 & 247, Pearl City, Honolulu County, HI

141

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

142

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

143

1. EXTERIOR VIEW TO THE NORTHWEST OF ANCILLARY STRUCTURES ASSOCIATED ...  

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

1. EXTERIOR VIEW TO THE NORTHWEST OF ANCILLARY STRUCTURES ASSOCIATED WITH AND SURROUNDING BUILDING 3210. - Nevada Test Site, Test Cell C Facility, Elevated Water Tower, Area 25, Jackass Flats, Road J, Mercury, Nye County, NV

144

16. INTERIOR, SECOND FLOOR, DETAIL OF PREVIOUSLY EXTERIOR POST AT ...  

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

16. INTERIOR, SECOND FLOOR, DETAIL OF PREVIOUSLY EXTERIOR POST AT EAST WALL, SHOWING NOTCHES FOR WEATHERBOARDS AND CRUDE FINISHING OF THE OAK FRAMING - Robeson-Williams Grist Mill, Roslyn, Nassau County, NY

145

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

146

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

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

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

147

EXTERIOR VIEW OF THE REAR AND SOUTHWEST SIDE OF BUILDING ...  

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

EXTERIOR VIEW OF THE REAR AND SOUTHWEST SIDE OF BUILDING 190 FACING EAST. - U.S. Naval Base, Pearl Harbor, Warehouse & Cold Storage Building, North corner of Pokomoke Street & Hornet Avenue, Pearl City, Honolulu County, HI

148

EXTERIOR VIEW OF THE REAR AND NORTHEAST SIDE OF BUILDING ...  

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

EXTERIOR VIEW OF THE REAR AND NORTHEAST SIDE OF BUILDING 190 FACING SOUTH. - U.S. Naval Base, Pearl Harbor, Warehouse & Cold Storage Building, North corner of Pokomoke Street & Hornet Avenue, Pearl City, Honolulu County, HI

149

EXTERIOR VIEW OF THE FRONT AND SOUTHWEST SIDE OF BUILDING ...  

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

EXTERIOR VIEW OF THE FRONT AND SOUTHWEST SIDE OF BUILDING 190 FACING NORTH. - U.S. Naval Base, Pearl Harbor, Warehouse & Cold Storage Building, North corner of Pokomoke Street & Hornet Avenue, Pearl City, Honolulu County, HI

150

EXTERIOR VIEW OF THE FRONT AND NORTHEAST SIDE OF BUILDING ...  

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

EXTERIOR VIEW OF THE FRONT AND NORTHEAST SIDE OF BUILDING 190 FACING WEST. - U.S. Naval Base, Pearl Harbor, Warehouse & Cold Storage Building, North corner of Pokomoke Street & Hornet Avenue, Pearl City, Honolulu County, HI

151

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

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

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

152

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

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

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

153

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

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

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

154

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

155

10 CFR 434.516 - Building exterior envelope.  

Code of Federal Regulations, 2010 CFR

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

2010-01-01

156

10 CFR 434.516 - Building exterior envelope.  

Code of Federal Regulations, 2014 CFR

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

2014-01-01

157

10 CFR 434.516 - Building exterior envelope.  

Code of Federal Regulations, 2013 CFR

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

2013-01-01

158

10 CFR 434.516 - Building exterior envelope.  

Code of Federal Regulations, 2011 CFR

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

2011-01-01

159

10 CFR 434.516 - Building exterior envelope.  

Code of Federal Regulations, 2012 CFR

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

2012-01-01

160

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

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

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

161

14. EXTERIOR STAIRS AT NORTH AND SOUTH ELEVATIONS SUBSISTENCE BUILDING ...  

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

14. EXTERIOR STAIRS AT NORTH AND SOUTH ELEVATIONS SUBSISTENCE BUILDING FROM GRADE TO ROOF OF COVERED WALK, SHEET 38 - U.S. Naval Hospital, North Ward, Park Boulevard, Balboa Park, San Diego, San Diego County, CA

162

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

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

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

163

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

164

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

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

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

165

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

166

1. Photocopy of photograph (Original source unknown, date unknown) EXTERIOR, ...  

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

1. Photocopy of photograph (Original source unknown, date unknown) EXTERIOR, SOUTH FRONT OF ADOBE INCLUDING ENVIRONS - Gaspar Orena House, East de la Guerra Street, Santa Barbara, Santa Barbara County, CA

167

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

168

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

169

Adaptive Boundary Conditions for Exterior Stationary Flows in Three Dimensions  

Microsoft Academic Search

.  Recently there has been an increasing interest for a better understanding of ultra low Reynolds number flows. In this context\\u000a we present a new setup which allows to efficiently solve the stationary incompressible Navier-Stokes equations in an exterior\\u000a domain in three dimensions numerically. The main point is that the necessity to truncate for numerical purposes the exterior\\u000a domain to a

Vincent Heuveline; Peter Wittwer

2010-01-01

170

Numerical method for Darcy flow derived using Discrete Exterior Calculus  

Microsoft Academic Search

We derive a numerical method for Darcy flow, hence also for Poisson's\\u000aequation in first order form, based on discrete exterior calculus (DEC).\\u000aExterior calculus is a generalization of vector calculus to smooth manifolds\\u000aand DEC is one of its discretizations on simplicial complexes such as triangle\\u000aand tetrahedral meshes. DEC is a coordinate invariant discretization, in that\\u000ait does

Anil N. Hirani; Kalyana B. Nakshatrala; Jehanzeb H. Chaudhry

2008-01-01

171

Galactic Metrics  

E-print Network

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

Mark D. Roberts

2002-09-22

172

Jupiter's ring system - New results on structure and particle properties  

NASA Technical Reports Server (NTRS)

Jupiter's diffuse ring system is upon reexamination of Voyager images noted to be composed of a relatively bright narrow ring and an inner toroidal halo as well as the 'gossamer' exterior ring, while the previously suspected inner disk is missing. Several narrow, bright features are visible in the main ring, and are suggested to be related in some way to Adrastea and Metis. The smallest ring particles and the dark, rough, red largest bodies both have total optical depths of 1-6 x 10 to the -6th. After arising at the bright ring's inner boundary, the halo rapidly expands inward to a 20,000-km thickness, and disappears at a radius of 90,000 km halfway between the main ring and the planet's cloudtops.

Showalter, Mark R.; Burns, Joseph A.; Cuzzi, Jeffrey N.; Pollack, James B.

1987-01-01

173

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

174

Saturn's Rings  

Microsoft Academic Search

Saturn's rings are not only one of the most beautiful object in the sky, but also a labo- ratory of dynamics and a likely remnant of the early solar system. Voyager fly-bys and recent ground-based observations have completely changed our knowledge and our understanding of the rings. Among many phenomena, collisions, resonances, gravita- tional perturbations and ring-satellite interactions play a

A. Brahic

2002-01-01

175

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

176

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

177

10. TROJAN MILL, EXTERIOR FROM EAST, c. 191928. ADDITION TO ...  

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

10. TROJAN MILL, EXTERIOR FROM EAST, c. 1919-28. ADDITION TO THE EAST END OF MILLING FLOOR VISIBLE WITH TRAM ENTRY DOOR. ALSO SEEN ARE THE ADDITIONS FOR MILL SOLUTION TANKS AND THE EAST SIDE OF SAMPLING ROOMS. CREDIT JW. - Bald Mountain Gold Mill, Nevada Gulch at head of False Bottom Creek, Lead, Lawrence County, SD

178

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

179

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

180

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

181

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

182

7. Interior view of unoccupied space; showing machinery, exterior windows ...  

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

7. Interior view of unoccupied space; showing machinery, exterior windows and double doors, enclosed hinged double doors; northeast corner of building; view to southwest - Ellsworth Air Force Base, Transmitter Standby Building, 200 yards east of County Road, Blackhawk, Meade County, SD

183

1. EXTERIOR VIEW OF FRONT OF CLUB HOUSE. BOAT HOUSE ...  

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

1. EXTERIOR VIEW OF FRONT OF CLUB HOUSE. BOAT HOUSE AND DOCK TO THE RIGHT. PICTURE TAKEN FROM FRONT YARD OF COTTAGE 231, CAMERA FACING SOUTHWEST. SMALL WOOD FRAME SHED IN FRONT OF CLUB HOUSE STORES FIRE HOSE BUILT AFTER 1980. - Swan Falls Village, Clubhouse 011, Snake River, Kuna, Ada County, ID

184

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

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

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

185

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

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

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

186

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

187

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

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

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

188

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

189

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

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

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

190

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

191

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

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

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

192

4. EXTERIOR SOUTH SIDE OF BUILDING 113 SHOWING LOW CONCRETE ...  

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

4. EXTERIOR SOUTH SIDE OF BUILDING 113 SHOWING LOW CONCRETE CURB ALONG EDGE OF DRIVEWAY, BRICK CHIMNEY, AND CLAY TILES ALONG THE ROOF RIDGE LINES. VIEW TO NORTHEAST. - Bishop Creek Hydroelectric System, Plant 4, Worker Cottage, Bishop Creek, Bishop, Inyo County, CA

193

Development and characterization of a wake-controlled exterior hood.  

PubMed

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

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

2004-12-01

194

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

195

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

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

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

196

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

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

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

197

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

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

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

198

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

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

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

199

EXTERIOR VIEW, LOOKING EAST, OF REDUCTION PLANT NO. 6 WITH ...  

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

EXTERIOR VIEW, LOOKING EAST, OF REDUCTION PLANT NO. 6 WITH PRIMARY AND SECONDARY LIMESTONE REDUCTION ('CRUSHING') IN PROGRESS AND A FRONT END LOADER (CONFIRM NAME OF VEHICLE?). - Wade Sand & Gravel Company, Reduction Plant No. 6, State Route 78, Thomas, Jefferson County, AL

200

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

201

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

202

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

203

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

204

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

205

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

206

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

207

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

208

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

209

14. DETAIL EXTERIOR VIEW LOOKING EAST AT DOWNSTREAM SIDE OF ...  

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

14. DETAIL EXTERIOR VIEW LOOKING EAST AT DOWNSTREAM SIDE OF NORTH END OF DAM/SPILLWAY; GANTRY CRANE ABOVE MOVABLE STONEY GATE IS VISIBLE IN CENTER BACKGROUND; FISH LADDER ON WASHINGTON SHORE IS VISIBLE IN FOREGROUND. - Bonneville Project, Bonneville Dam, Columbia River, Bonneville, Multnomah County, OR

210

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

211

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

212

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

213

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

214

4. EXTERIOR OF SOUTH END OF BUILDING 105 SHOWING TALL ...  

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

4. EXTERIOR OF SOUTH END OF BUILDING 105 SHOWING TALL RUSTIC STYLE CHIMNEY WITH GABLE FRAME, METAL ROOF, AND CONCRETE WALKWAY AND STEP TO OPEN SIDE-ENTRY DOOR AT PHOTO ENTER. ORIGINAL DECORATIVE WOOD SHIPLAP SIDING ON UPPER END GABLE HAS BEEN COVERED WITH ASPHALT SHINGLES. VIEW TO NORTH. - Rush Creek Hydroelectric System, Worker Cottage, Rush Creek, June Lake, Mono County, CA

215

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

216

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

217

126. EXTERIOR VIEW, LOOKING NORTH, SHOWING CAST SHED NO. 2, ...  

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

126. EXTERIOR VIEW, LOOKING NORTH, SHOWING CAST SHED NO. 2, FURNACE NO. 2, STOVES, POWER HOUSE, STACKS, FURNACE NO. 1 CAST SHED. FURNACE NO. 2 IS IN PROCESS OF RESTORATION. - Sloss-Sheffield Steel & Iron, First Avenue North Viaduct at Thirty-second Street, Birmingham, Jefferson County, AL

218

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

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

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

219

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

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

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

220

6. Historic American Buildings Survey COPY OF EXTERIOR PHOTO PUBLISHED ...  

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

6. Historic American Buildings Survey COPY OF EXTERIOR PHOTO PUBLISHED IN HIGGINSON, MARY THATCHER, THOMAS WENTWORTH HIGGINSON, THE STORY OF HIS LIFE (BOSTON AND NEW YORK, 1914), OPP. p. 30. Gift of Cambridge Historical Commission - Stephen Higginson Jr. House, 7 Kirkland Street, Cambridge, Middlesex County, MA

221

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

222

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

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

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

223

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

224

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

225

VIEW OF STATION BARLOW SHOWING EXPOSED EXTERIOR FRONT AND LEFT ...  

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

VIEW OF STATION BARLOW SHOWING EXPOSED EXTERIOR FRONT AND LEFT SIDE OF THE CONCRETE CONCEALMENT WITH SANDSTONE FLANK-WALL FRAGMENT, FACING NORTHWEST - White's Point Reservation, Base End Stations, B"1, Bounded by Voyager Circle & Mariner Drive, San Pedro, Los Angeles County, CA

226

3. VIEW OF STATION PARLEY FACING NORTHWEST, SHOWING EXPOSED EXTERIOR ...  

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

3. VIEW OF STATION PARLEY FACING NORTHWEST, SHOWING EXPOSED EXTERIOR FRONT AND LEFT SIDE OF THE CONCRETE CONCEALMENT, SANDSTONE FLANKWALL IS VISIBLE AT LEFT REAR. - White's Point Reservation, Base End Stations, B"6, Bounded by Voyager Circle & Mariner Drive, San Pedro, Los Angeles County, CA

227

VIEW OF STATION BARLOW FACING NORTH SHOWING EXPOSED EXTERIOR FRONT ...  

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

VIEW OF STATION BARLOW FACING NORTH SHOWING EXPOSED EXTERIOR FRONT OF THE CONCRETE CONCEALMENT, SANDSTONE FLANK-WALL FRAGMENT VISIBLE AT LEFT REAR - White's Point Reservation, Base End Stations, B"1, Bounded by Voyager Circle & Mariner Drive, San Pedro, Los Angeles County, CA

228

VIEW OF STATION LEARY FACING NORTH SHOWING EXPOSED EXTERIOR FRONT ...  

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

VIEW OF STATION LEARY FACING NORTH SHOWING EXPOSED EXTERIOR FRONT OF THE CONCRETE CONCEALMENT INCLUDING POST 1920 DOORWAY ALTERATIONS, SANDSTONE FLANK-WALLS ARE VISIBLE AT REAR SIDES - White's Point Reservation, Base End Stations, B"3, Bounded by Voyager Circle & Mariner Drive, San Pedro, Los Angeles County, CA

229

VIEW OF STATION OSGOOD FACING NORTH SHOWING EXPOSED EXTERIOR FRONT ...  

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

VIEW OF STATION OSGOOD FACING NORTH SHOWING EXPOSED EXTERIOR FRONT OF THE CONCRETE CONCEALMENT INCLUDING POST 1920 DOORWAY ALTERATIONS, SANDSTONE FLANK-WALLS ARE VISIBLE AT REAR SIDES - White's Point Reservation, Base End Stations, B"5, Bounded by Voyager Circle & Mariner Drive, San Pedro, Los Angeles County, CA

230

VIEW OF STATION LEARY FACING NORTHWEST, SHOWING EXPOSED EXTERIOR FRONT ...  

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

VIEW OF STATION LEARY FACING NORTHWEST, SHOWING EXPOSED EXTERIOR FRONT AND LEFT SIDE OF THE CONCRETE CONCEALMENT, SANDSTONE FLANKWALL IS VISIBLE AT LEFT REAR - White's Point Reservation, Base End Stations, B"3, Bounded by Voyager Circle & Mariner Drive, San Pedro, Los Angeles County, CA

231

VIEW OF STATION SAXTON FACING NORTH SHOWING EXPOSED EXTERIOR FRONT ...  

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

VIEW OF STATION SAXTON 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"2, Bounded by Voyager Circle & Mariner Drive, San Pedro, Los Angeles County, CA

232

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

233

VIEW OF STATION OSGOOD FACING NORTHWEST, SHOWING EXPOSED EXTERIOR FRONT ...  

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

VIEW OF STATION OSGOOD FACING NORTHWEST, SHOWING EXPOSED EXTERIOR FRONT AND LEFT SIDE OF THE CONCRETE CONCEALMENT, SANDSTONE FLANKWALL IS VISIBLE AT LEFT REAR - White's Point Reservation, Base End Stations, B"5, Bounded by Voyager Circle & Mariner Drive, San Pedro, Los Angeles County, CA

234

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

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

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

235

Exterior space for patients with Alzheimer's disease and related disorders  

Microsoft Academic Search

This paper examines program considerations for the design of exterior space for Alzheimer's disease patients. It is directed to planners and administrators, architects and landscape architects involved in the initial planning stages of an Alzheimer's disease facility (or nursing home) building project. The focus of the study is the Alzheimer's disease patient who is no longer able to attend to

Priscilla Randall; Sandra S. J. Burkhardt; Joan Kutcher

1990-01-01

236

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

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

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

237

EXTERIOR VIEW, LOOKING NORTH, OF THE 'OLD PIT' WITH EXTRACTION ...  

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

EXTERIOR VIEW, LOOKING NORTH, OF THE 'OLD PIT' WITH EXTRACTION OF LIMESTONE IN PROCESS. AN ELEVEN-HOLE SHOT IS DISLODGING APPROXIMATELY 25,000 TONS OF LIMESTONE FOR USE IN ROAD CONSTRUCTION. - Vulcan Material Company, Calera Quarry, 1614 Highway 84, Calera, Shelby County, AL

238

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

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

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

239

INVERSE SOUND SOURCE RECONSTRUCTION BY EXTERIOR SPHERICAL ACOUSTICAL HOLOGRAPHY  

E-print Network

INVERSE SOUND SOURCE RECONSTRUCTION BY EXTERIOR SPHERICAL ACOUSTICAL HOLOGRAPHY WITH MODEL@gmail.com Spherical acoustical holography (SAH) can be used to reconstruct the 3D sound field from acoustic data the source position from the hologram data are investigated. 1. Introduction Spherical acoustical holography

240

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

241

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

242

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

243

20. Elevator no. 2: stairway, doorway and exterior north wall ...  

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

20. Elevator no. 2: stairway, doorway and exterior north wall of control room (floor 5, elevated to right), with control shafts and turnhead distributor, facing east - Washburn Crosby Company Elevators No. 2 & 3, 900 & 1000 Second Avenue, South, Minneapolis, Hennepin County, MN

244

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

245

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

246

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

247

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

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

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

248

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

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

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

249

7. EXTERIOR OF WAREHOUSE Pump house is the small, two ...  

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

7. EXTERIOR OF WAREHOUSE Pump house is the small, two story building protruding out into the water on the right. The reduction plant is on the left, topped by a louvered ventilation tower. - Hovden Cannery, 886 Cannery Row, Monterey, Monterey County, CA

250

24 CFR 3280.105 - Exit facilities; exterior doors.  

Code of Federal Regulations, 2011 CFR

...exterior door other than screen or storm doors shall have a key-operated lock that has a deadlocking latch or a key-operated dead bolt with a passage latch. Locks shall not require the use of a key for operation from the inside. (4) All...

2011-04-01

251

24 CFR 3280.105 - Exit facilities; exterior doors.  

Code of Federal Regulations, 2010 CFR

...exterior door other than screen or storm doors shall have a key-operated lock that has a deadlocking latch or a key-operated dead bolt with a passage latch. Locks shall not require the use of a key for operation from the inside. (4) All...

2010-04-01

252

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

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

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

253

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

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

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

254

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

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

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

255

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

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

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

256

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

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

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

257

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

258

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

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

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

259

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

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

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

260

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

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

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

261

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

262

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

263

1. EAGLE MILL EXTERIOR FROM NORTHWEST, c. 1907. SHOWS INITIAL ...  

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

1. EAGLE MILL EXTERIOR FROM NORTHWEST, c. 1907. SHOWS INITIAL MILL CONFIGURATION WITH FULLY EXPOSED CRUDE ORE BIN CONCRETE RETAINING WALL, SINGLE (SOUTH) CRUDE ORE BIN, AND EXPOSED CRUSHER HOUSE. NOTE THE LACK OF MACHINE SHOP OR SNOW SHEDS. CREDIT JW. - Bald Mountain Gold Mill, Nevada Gulch at head of False Bottom Creek, Lead, Lawrence County, SD

264

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

265

IMPROVING THE EXTERIOR ORIENTATION OF MARS EXPRESS HRSC IMAGERY  

Microsoft Academic Search

This paper focusses on the estimation of exterior orientation parameters o f the High Resolution Stereo Camera (HRSC) orbiting planet Mars during the European Mars Express mission since January 2004. One of the challenges for the photogrammetric processing of HRSC images is the low number of Ground Control Points (GCPs) on Mars which can be identified and measured in the

Heinrich Ebner; Michael Spiegel; Albert Baumgartner; Bernd Giese; Gerhard Neukum

266

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

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

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

267

OFFICE WORKER PREFERENCES OF EXTERIOR SHADING DEVICES: A PILOT STUDY  

Microsoft Academic Search

Solar shading devices are commonly used in offices to reduce cooling loads and glare from windows, but they also affect daylighting and the view to the outside. In this study, the function and op- eration of an awning and an exterior venetian blind as well as their influence on the view out was assessed by fifty office workers. The preferred

Helena Bülow-Hübe

268

3. EXTERIOR OF FRONT ENTRY SHOWING GABLE OVER RECESSED PORCH ...  

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

3. EXTERIOR OF FRONT ENTRY SHOWING GABLE OVER RECESSED PORCH WITH RUSTIC STYLE DECORATIVE TREATMENT. WELDED STEEL PORCH RAILING ADDED IN 1972 IS VISIBLE AT PHOTO CENTER. VIEW TO SOUTHWEST. - Rush Creek Hydroelectric System, Worker Cottage, Rush Creek, June Lake, Mono County, CA

269

1. EXTERIOR FRONT (SOUTH) SIDE OF BUILDING 102 LOOKING AT ...  

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

1. EXTERIOR FRONT (SOUTH) SIDE OF BUILDING 102 LOOKING AT MAIN L-SHAPED PORTION OF HOUSE WHICH REPRESENTS TWO 19TH CENTURY CASHBAUGH PERIOD BUILDINGS COMBINED INTO ONE. VIEW TO NORTHWEST. - Bishop Creek Hydroelectric System, Plant 6, Cashbaugh-Kilpatrick House, Bishop Creek, Bishop, Inyo County, CA

270

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

Code of Federal Regulations, 2012 CFR

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

2012-10-01

271

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

Code of Federal Regulations, 2011 CFR

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

2011-10-01

272

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

Code of Federal Regulations, 2013 CFR

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

2013-10-01

273

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

Code of Federal Regulations, 2010 CFR

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

2010-10-01

274

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

Code of Federal Regulations, 2014 CFR

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

2014-10-01

275

24 CFR 3280.405 - Standard for swinging exterior passage doors for use in manufactured homes.  

Code of Federal Regulations, 2010 CFR

...exterior passage doors for use in manufactured homes. 3280.405 Section 3280.405 ...HOUSING AND URBAN DEVELOPMENT MANUFACTURED HOME CONSTRUCTION AND SAFETY STANDARDS Testing...exterior passage doors for use in manufactured homes. (a) Introduction. This...

2010-04-01

276

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

277

EXTERIOR PERSPECTIVE SHOWING CONNECTION BETWEEN THE HOG BARN AND THE ...  

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

EXTERIOR PERSPECTIVE SHOWING CONNECTION BETWEEN THE HOG BARN AND THE 1954 ADDITION, LOOKING NORTH. (After a fire destroyed the main barn on the property, this addition was hastily added to the north end of the hog barn to provide temporary storage for hay bales. Fifty-four years later, the barn addition is still in use.) - Engle Farm, Barn, 89 South Ebey Road, Coupeville, Island County, WA

278

BARN EXTERIOR PERSPECTIVE OF WEST FAÇADE FROM ACCESS ROAD, LOOKING ...  

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

BARN EXTERIOR PERSPECTIVE OF WEST FAÇADE FROM ACCESS ROAD, LOOKING EAST. (A shed addition was added to the north end of the barn in the mid-1950s for squash storage. Another addition was built in the early 1970s to provide feeding and watering troughs for cattle. This image also shows the granary, on the right.) - Smith Farm, Barn, 399 Ebey Road, Coupeville, Island County, WA

279

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

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

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

280

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

281

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

282

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

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

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

283

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

284

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

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

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

285

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

286

Spray Foam Exterior Insulation with Stand-Off Furring  

SciTech Connect

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

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

2014-03-01

287

11. Credit PSR. Exterior of Building 4305 looking north at ...  

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

11. Credit PSR. Exterior of Building 4305 looking north at the southwest and southeast facades of the hangar. The reels grouped on the apron southeast of the structure are for fiber-optic and telephone cable. The concrete pads in the immediate forground were not identifiable from existing historic drawings or photographs. - Edwards Air Force Base, North Base, Unicon Portable Hangar, First & C Streets, Boron, Kern County, CA

288

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

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

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

289

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

290

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

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

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

291

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

292

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

293

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.

294

Cladding Attachment Over Thick Exterior Insulating Sheathing (Fact Sheet)  

SciTech Connect

The addition of insulation to the exterior of buildings is an effective means of increasing the thermal resistance of wood-framed walls and mass masonry wall assemblies. The location of the insulation on the exterior of the structure has many direct benefits, including better effective R-value from reduced thermal bridging, better condensation resistance, reduced thermal stress on the structure, as well as other commonly associated improvements such as increased airtightness and improved water management. For thick layers of exterior insulation (more than 1.5 in.), the use of wood furring strips attached through the insulation back to the structure has been used by many contractors and designers as a means to provide a convenient cladding attachment location. Although the approach has proven effective, there is significant resistance to its widespread implementation due to a lack of research and understanding of the mechanisms involved in the development of the vertical displacement resistance capacity. In addition, the long-term in-service performance of the system has been questioned due to potential creep effects of the assembly under the sustained dead load of the cladding and effects of varying environmental conditions. In addition, the current International Building Code (IBC) and International Residential Code (IRC) do not have a provision that specifically allows this assembly.

Not Available

2013-11-01

295

Staining potential of sealants in/on exterior wall substrates  

SciTech Connect

The investigation of dozens of exterior walls on buildings by the authors have revealed that certain sealants used to seal joints in exterior walls have caused the following conditions: 1. Local staining and discoloration of masonry wall substrates due to penetration of sealant into substrates. 2. Local change in absorption of masonry wall substrates due to penetration of sealant into the substrates which results in local discoloration of wall substrates after rains. 3. Surface discoloration of sealant due to dirt accumulation on sealant. 4. Stains in the form of streaks of direct on masonry and on metal wall substrates due to transfer by rain water of some of the dirt on the sealant surface onto the adjacent surface of the substrate. Laboratory and field testing of the major commercially available sealants by the authors to date have revealed that silicone sealants have the propensity to stain certain exterior wall substrates while polyurethane sealants do not; that silicone sealants in service discolor more significantly and faster due to dirt accumulation than polyurethane sealants; that sealant that has penetrated into masonry substrates cannot be entirely removed from the substrate by cleaning; and that preconstruction testing of sealants and proper material selection can help to avoid staining of sealant.

Chin, I.R.; Gorrell, T.A.; Scheffler, M.J. [Wiss, Janney, Elstner Associates, Inc., Chicago, IL (United States)

1996-12-31

296

Lighting the Great Outdoors: LEDs in Exterior Applications  

SciTech Connect

Recent progress in the development of white light LEDs promises great impact by opening up the huge potential for LED illumination in new areas. One such area is general illumination for exterior applications. For example, there are an estimated combined 60.5 million roadway and parking installations in the U.S. These lights account for an estimated 53.3 TWh of electricity usage annually -- nearly 7% of all lighting. If LEDs could provide the same light performance with just 25% greater efficiency, savings of over 13 TWh could be achieved. In 2007, the authors assessed emerging LED lighting technologies in a parking garage and on a city street. The purpose of these tests was to enable a utility to determine whether energy efficiency programs promoting white light LED products might be justified. The results have supported the great promise of LEDs in exterior applications, while also highlighting the barriers that continue to hinder their widespread adoption. Such barriers include 1) inconsistent product quality across manufacturers; 2) lack of key metrics for comparing LEDs to conventional sources; and 3) high upfront cost of LED luminaires compared to conventional luminaires. This paper examines these barriers, ways in which energy-efficiency programs could help to overcome them, and the potential for energy and financial savings from LED lighting in these two exterior applications.

Cook, Tyson D. S.; Bryan, Mary M.; Kinzey, Bruce R.; Myer, Michael

2008-08-17

297

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

298

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

299

Galactic Discourse Issue 5  

E-print Network

??????????????????????? Rumor Has It (fiction) ???????????????????????? Anna Walker ??????????????????????? I Know You (poem) ????????????????????????????? 8. L. Barr ???????????????????????? Later, My Friend (poem) ??????????????????????? Debbie Gilbert...: Berkeley Hunt. PROOFREADERS: Mabel 8lunk, Vivian Huff, Berkeley Hunt, Andrea Kunz, & Debbie Kutter. GALACTIC DISCOURSE 5 was printed by Graphtech Printing, Montclair, CA. Copyright ~April, 1987 by Laurie Huff for the contributors. GALACTIC DISCOURSE...

Multiple Contributors

1987-01-01

300

Active galactic nuclei  

PubMed Central

Active galactic nuclei are the most powerful, long-lived objects in the Universe. Recent data confirm the theoretical idea that the power source is accretion into a massive black hole. The common occurrence of obscuration and outflows probably means that the contribution of active galactic nuclei to the power density of the Universe has been generally underestimated. PMID:10220363

Fabian, Andrew C.

1999-01-01

301

Ringed World  

Microsoft Academic Search

\\u000a What is the most beautiful object in the sky? Many people will favour a spiral galaxy, such as the Whirlpool; others will\\u000a opt for a lunar crater, or a great comet with a glowing head and long, gently-curved tail – but my vote goes unhesitatingly\\u000a to Saturn, the planet with the rings. There are plenty of spirals, many lunar craters

Patrick Moore

302

Modeled and metered energy savings from exterior wall insulation  

SciTech Connect

Millions of single-family masonry (block) houses with slab foundations exist in the southern United States. In fact, approximately 50% of Florida`s six million residences are of concrete block construction. The block walls in these homes are usually uninsulated, and the technology for retrofitting wall insulation is not well developed. Two field tests were performed--one near Phoenix, Arizona and one in Cocoa, Florida--to measure the air-conditioning energy savings and demand reduction impact of applying an exterior insulation and finish system (EEFS) to the exterior of the block wall, and gain practical experience with retrofit application techniques and costs. One field test used a {open_quotes}site-fabricated{close_quotes} insulation system, while the other field test used a commercially available system. The field tests measured a savings of 9% in Arizona and less savings in Florida, and emphasized the impact indoor temperature settings have on cooling energy savings: exterior wall insulation on block homes will produce energy savings in Florida houses only if a low cooling thermostat setting is desirable. The field tests also highlighted an improved comfort benefit from the retrofit - namely, elimination of overheating in rooms with south and west exposures. The DOE-2. ID program was used to analyze the energy savings (air-conditioning and heating) and electric demand impact of applying an EIFS. Air-conditioning energy savings were estimated to be in the range of 8% to 10% in many southern U.S. regions. A 12% savings was predicted for Phoenix, Arizona and a savings of 1% to 4% was predicted for seacoast regions, particularly in Florida. These predictions were in good agreement with the measured values. Peak hour cooling energy savings were predicted to be more uniform throughout the country, generally in the range of %8 to %12.

Ternes, M.; Parker, D.; McLain, H.; Barkaszi, S. Jr.

1996-09-01

303

On Weakly Coherent Rings  

E-print Network

In this paper, we define weakly coherent rings, and examine the transfer of these rings to homomorphic image, trivial ring extension, localization, and direct product. These results provide examples of weakly coherent rings that are not coherent rings. We show that the class of weakly coherent rings is not stable by localization. Also, we show that the class of weakly coherent rings and the class of strongly 2-coherent rings are not comparable.

Bakkari, Chahrazade

2010-01-01

304

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

305

6. EXTERIOR VIEW OF HILLMAN FAN HOUSE LOOKING WEST The ...  

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

6. EXTERIOR VIEW OF HILLMAN FAN HOUSE LOOKING WEST The engine house is on the right. The end of the 1883 Pittston Steam Engine cylinder head and steam chest is visible in the doorway. Although its stairs are missing, the iron framing of a porch stands in front of what was a doorway. The entrance door to the north airlock is visible inside the enlarged window. The end view of the upshaft chimney shows the brick ribbing for support, the brick corbelling, and concrete capstones. - Dorrance Colliery Fan Complex, South side of Susquehanna River at Route 115 & Riechard Street, Wilkes-Barre, Luzerne County, PA

306

EXTERIOR VIEW, LOOKING EAST, OF REDUCTION PLANT NO. 6 WITH ...  

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

EXTERIOR VIEW, LOOKING EAST, OF REDUCTION PLANT NO. 6 WITH PRIMARY AND SECONDARY LIMESTONE REDUCTION ('CRUSHING') IN PROGRESS. FEEDER (RIGHT) FEEDS TO CONVEYOR BELTS (CENTER) AND CRUSHER (LEFT). LIMESTONE PROCESSED THROUGH THIS OPERATION IS FURTHER SCREENED AND PROCESSED AT ANOTHER PLANT ON THE THOMAS SITE. OPERATION OF THIS PLANT, WHICH BEGAN IN 1960, INCORPORATES WITHIN THE FEEDER A CONCRETE RETAINING WALL DATING TO A TURN OF THE CENTURY QUARRY OPERATION FORMERLY ON THIS SITE. - Wade Sand & Gravel Company, Reduction Plant No. 6, State Route 78, Thomas, Jefferson County, AL

307

Exterior view of submarine with survey crew posed in front. ...  

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

Exterior view of submarine with survey crew posed in front. From left to right: Todd Croteau - U.S. National Park Service, Joshua Price - U.S. Navy, Bert Ho - National Oceanic and Atmospheric Administration, Michael McCarthy - Western Australia Maritime Museum, Larry Murphy - U.S. National Park Service, Don Johnson- University of Nebraska Engineering School, James Delgado- Institute for Nautical Archeology, Jacinto Ahmendra - Government of Panama. - Sub Marine Explorer, Located along the beach of Isla San Telmo, Pearl Islands, Isla San Telmo, Former Panama Canal Zone, CZ

308

7. TROJAN MILL, EXTERIOR FROM NORTHWEST, c. 191828. ADDITIONS FOR ...  

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

7. TROJAN MILL, EXTERIOR FROM NORTHWEST, c. 1918-28. ADDITIONS FOR PRIMARY THICKENERS No. 1 AND No. 2, SECONDARY THICKENERS No. 1, No. 2, AND No. 3, AGITATORS, AIR COMPRESSOR, AND PORTLAND FILTERS ARE SHOWN COMPLETE. STAIR ON NORTH SIDE OF CRUDE ORE BINS IS PRESENT AS IS THE LIME BIN ADJACENT TO THE WEST CRUDE ORE BIN, AND THE SNOW SHED ADDED OVER THE TRAMLINE SERVING THE EAST AND WEST CRUDE ORE BINS. ALSO PRESENT IS THE BABBITT HOUSE AND ROCK BIN. CREDIT JW. - Bald Mountain Gold Mill, Nevada Gulch at head of False Bottom Creek, Lead, Lawrence County, SD

309

Exterior cloaking with active sources in two dimensional acoustics  

E-print Network

We cloak a region from a known incident wave by surrounding the region with three or more devices that cancel out the field in the cloaked region without significantly radiating waves. Since very little waves reach scatterers within the cloaked region, the scattered field is small and the scatterers are for all practical purposes undetectable. The devices are multipolar point sources that can be determined from Green's formula and an addition theorem for Hankel functions. The cloaking devices are exterior to the cloaked region.

Fernando Guevara Vasquez; Graeme W. Milton; Daniel Onofrei

2010-09-10

310

EXTERIOR OVERVIEW, LOOKING NORTH, OF THIS 400' DEEP LIMESTONE QUARRY ...  

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

EXTERIOR OVERVIEW, LOOKING NORTH, OF THIS 400' DEEP LIMESTONE QUARRY PIT ('THE OLD PIT') WITH LEDGE PREPARED FOR LIMESTONE EXTRACTION. AN ELEVEN-HOLE SHOT WILL DISLODGE APPROXIMATELY 25,000 TONS OF LIMESTONE WHICH, AFTER LOADING AND CRUSHING, WILL BE USED FOR ROAD CONSTRUCTION. THE CALERA QUARRY IS ONE OF FOUR ACTIVE VULCAN MATERIALS COMPANY QUARRIES IN THE DISTRICT. VULCAN MATERIALS, A FORTUNE 500 FIRM, ESTABLISHED IN BIRMINGHAM IN 1906 AS BIRMINGHAM SLAG COMPANY, VULCAN MATERIALS IS THE NATION'S FOREMOST PRODUCER OF CONSTRUCTION AGGREGATE AND A LEADING CHEMICALS MANUFACTURER. - Vulcan Material Company, Calera Quarry, 1614 Highway 84, Calera, Shelby County, AL

311

EXTERIOR OVERVIEW, LOOKING NORTH, OF THIS 400' DEEP LIMESTONE QUARRY ...  

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

EXTERIOR OVERVIEW, LOOKING NORTH, OF THIS 400' DEEP LIMESTONE QUARRY PIT ("THE OLD PIT") WITH LEDGE PREPARED FOR LIMESTONE EXTRACTION. AN ELEVEN-HOLE SHOT WILL DISLODGE APPROXIMATELY 25,000 TONS OF LIMESTONE WHICH, AFTER LOADING AND CRUSHING, WILL BE USED FOR ROAD CONSTRUCTION. THE CALERA QUARRY IS ONE OF FOUR ACTIVE VULCAN MATERIALS COMPANY QUARRIES IN THE DISTRICT. VULCAN MATERIALS, A FORTUNE 500 FIRM, ESTABLISHED IN BIRMINGHAM IN 1906 AS BIRMINGHAM SLAG COMPANY, VULCAN MATERIALS IS THE NATION'S FOREMOST PRODUCER OF CONSTRUCTION AGGREGATE AND A LEADING CHEMICALS MANUFACTURER - Vulcan Material Company, Calera Quarry, 1614 Highway 84, Calera, Shelby County, AL

312

Vortex sheets with reflection symmetry in exterior domains  

NASA Astrophysics Data System (ADS)

In this paper we prove the existence of a weak solution of the incompressible 2D Euler equations in the exterior of a reflection symmetric smooth bluff body with symmetric initial flow corresponding to vortex sheet type data whose vorticity is of distinguished sign on each side of the symmetry axis. This work extends the results proved for full plane flow by the authors in [M.C. Lopes Filho, H.J. Nussenzveig Lopes, Z. Xin, Existence of vortex sheets with reflection symmetry in two space dimensions, Arch. Ration. Mech. Anal. 158 (3) (2001) 235-257].

Lopes Filho, M. C.; Nussenzveig Lopes, H. J.; Xin, Zhouping

313

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

314

On Weakly Coherent Rings  

Microsoft Academic Search

In this paper, we define weakly coherent rings, and examine the transfer of these rings to homomorphic image, trivial ring extension, localization, and direct product. These results provide examples of weakly coherent rings that are not coherent rings. We show that the class of weakly coherent rings is not stable by localization. Also, we show that the class of weakly

Chahrazade Bakkari; Najib Mahdou

2010-01-01

315

Evidence for universal structure in galactic halos  

E-print Network

The late infall of dark matter onto a galaxy produces structure (such as caustics) in the distribution of dark matter in the halo. We argue that such structure is likely to occur generically on length scales proportional to $l \\sim t_0 v_{rot}$, where $t_0$ is the age of the universe and $v_{rot}$ is the rotation velocity of the galaxy. A set of 32 extended galactic rotation curves is analyzed. For each curve, the radial coordinate is rescaled according to $r\\to \\tilde r \\equiv r (v_0 / v_{rot})$, where we choose $v_0 = 220 km/s$. A linear fit to each rescaled rotation curve is subtracted, and the residuals are binned and averaged. The sample shows significant features near $\\tilde r = 40 kpc$ and $\\tilde r = 20 kpc$. This is consistent with the predictions of the self-similar caustic ring model of galactic halos.

William H. Kinney; Pierre Sikivie

1999-06-02

316

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

317

Technique of WinCC Long-Distance Accessing Exterior SQL Server Database  

Microsoft Academic Search

The technique of configuration software WinCC accessing to exterior database has been studied. Take the coal mine automation system as background, the data in exterior SQL server database has been displayed in the WinCC configuration graphic real-time by calling the ADO control in VBScript system. The integration of WinCC configuration system and exterior database has been achieved. simultaneity, the capability

Gongbo Zhou; Zhencai Zhu; Guangzhu Chen; Aijun Zhang

2009-01-01

318

Symmetric Representation Rings are lambda-Rings.  

E-print Network

The representation ring of an affine algebraic group scheme can be endowed with the structure of a (special) lambda-ring. We show that the same is true for the ring of symmetric representations, i.e. for the Grothendieck-Witt ring of the representation category, for any affine algebraic group scheme over a field of characteristic not two.

Marcus Zibrowius

319

Electron-Atom Ionization Calculations using Propagating Exterior Complex Scaling  

NASA Astrophysics Data System (ADS)

The exterior complex scaling method (Science 286 (1999) 2474), pioneered by Rescigno, McCurdy and coworkers, provided highly accurate ab initio solutions for electron-hydrogen collisions by directly solving the time-independent Schr"odinger equation in coordinate space. An extension of this method, propagating exterior complex scaling (PECS), was developed by Bartlett and Stelbovics (J. Phys. B 37 (2004) L69, J. Phys. B 39 (2006) R379) and has been demonstrated to provide computationally efficient and accurate calculations of ionization and scattering cross sections over a large range of energies below, above and near the ionization threshold. An overview of the PECS method for three-body collisions and the computational advantages of its propagation and iterative coupling techniques will be presented along with results of: (1) near-threshold ionization of electron-hydrogen collisions and the Wannier threshold laws, (2) scattering cross section resonances below the ionization threshold, and (3) total and differential cross sections for electron collisions with excited targets and hydrogenic ions from low through to high energies. Recently, the PECS method has been extended to solve four-body collisions using time-independent methods in coordinate space and has initially been applied to the s-wave model for electron-helium collisions. A description of the extensions made to the PECS method to facilitate these significantly more computationally demanding calculations will be given, and results will be presented for elastic, single-excitation, double-excitation, single-ionization and double-ionization collisions.

Bartlett, Philip

2007-10-01

320

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

321

Galactic longitude dependent galactic model parameters  

NASA Astrophysics Data System (ADS)

We present the Galactic model parameters for thin disc estimated by Sloan Digital Sky Survey ( SDSS) data of 14 940 stars with apparent magnitudes 16 < g0 ? 21 in six intermediate latitude fields in the first Galactic quadrant. Star/galaxy separation was performed by using the SDSS photometric pipeline and the isodensity contours in the ( g - r) 0 - ( r - i) 0 two colour diagram. The separation of thin disc stars is carried out by the bimodal distribution of stars in the ( g - r) 0 histogram, and the absolute magnitudes were evaluated by a procedure presented in the literature (Bilir, S., Karaali, S., Tunçel, S. 2005. AN 326, 321). Exponential density law fits better to the derived density functions for the absolute magnitude intervals 8 < M( g) ? 9 and 11 < M( g) ? 12, whereas sech/sech 2 laws are more appropriate for absolute magnitude intervals 9 < M( g) ? 10 and 10 < M( g) ? 11. We showed that the scaleheight and scalelength are Galactic longitude dependent. The average values and ranges of the scaleheight and the scalelength are < H> = 220 pc (196 ? H ? 234 pc) and < H> = 1900 pc (1561 ? h ? 2280 pc) respectively. This result would be useful to explain different numerical values claimed for those parameters obtained by different authors for the fields in different directions of the Galaxy.

Bilir, S.; Karaali, S.; Ak, S.; Yaz, E.; Hamzao?lu, E.

2006-12-01

322

Kinetics of ring formation  

NASA Astrophysics Data System (ADS)

We study reversible polymerization of rings. In this stochastic process, two monomers bond and, as a consequence, two disjoint rings may merge into a compound ring or a single ring may split into two fragment rings. This aggregation-fragmentation process exhibits a percolation transition with a finite-ring phase in which all rings have microscopic length and a giant-ring phase where macroscopic rings account for a finite fraction of the entire mass. Interestingly, while the total mass of the giant rings is a deterministic quantity, their total number and their sizes are stochastic quantities. The size distribution of the macroscopic rings is universal, although the span of this distribution increases with time. Moreover, the average number of giant rings scales logarithmically with system size. We introduce a card-shuffling algorithm for efficient simulation of the ring formation process and we present numerical verification of the theoretical predictions.

Ben-Naim, E.; Krapivsky, P. L.

2011-06-01

323

Earth: A Ringed Planet?  

Microsoft Academic Search

Among the most beautiful findings of the Space Age have been the discoveries of planetary rings. Not only Saturn but also Jupiter, Uranus and Neptune have rings; Saturn's ring system has structures newly discovered; even Saturn's moon Rhea itself has a ring. All these are apparently supplied by material from the planetary moons (Rhea's ring by Rhea itself). The question

L. O. Hancock; H. Povenmire

2010-01-01

324

Perihelion evolution of observed new comets implies the dominance of the galactic tide in making Oort cloud comets discernable  

Microsoft Academic Search

For an Oort cloud comet to be seen as a new comet, its perihelion must be moved from a point exterior to the loss cylinder boundary to a point interior to observable limits in a single orbit. The galactic tide can do this continuously, in a non-impulsive manner. Near-parabolic comets, with specific angular momentum H?q, will most easily be made

John J. Matese; Jack J. Lissauer

2004-01-01

325

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

326

The acoustical testing of thermally insulated exterior building elements  

SciTech Connect

Often, but not always, acoustical insulation is used in place of thermal insulation, and vice versa. Often also, both are used for the same purpose. But the thermal and acoustical properties of a material are different and often not related. Hence a good thermal insulator may or may not be a good acoustical insulator. The physics of heat transfer and sound are different. As a result, the results of testing of the materials for one property do not necessarily provide any indication of the other property. This paper discusses the commonalties and differences of the thermal and acoustical materials used for exterior building elements and discuss national and international methods of acoustical test, emphasizing ASTM testing where appropriate.

Peppin, R.J. [Larson Davis, Inc., Rockville, MD (United States); Duersch, G.M. [Larson Davis, Inc., Provo, UT (United States); Beam, M.J.; Miller, K. [Miller Henning Associates, McLean, VA (United States)

1997-11-01

327

Closeup view of the exterior of the starboard side of ...  

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

Close-up view of the exterior of the starboard side of the forward fuselage of the Orbiter Discovery looking at the forward facing observation windows of the flight deck. Note the High-temperature Reusable Surface Insulation (HRSI) surrounding the window openings, the Low-temperature Reusable Surface Insulation (LRSI) immediately beyond the HRSI tiles and the Advanced Flexible Reusable Surface Insulation blankets just beyond the LRSI tiles. The holes in the tiles are injection points for the application of waterproofing material. The windows are composed of redundant pressure window panes of thermal glass. This image was taken from a service platform in the Orbiter Processing Facility at Kennedy Space Center - Space Transportation System, Orbiter Discovery (OV-103), Lyndon B. Johnson Space Center, 2101 NASA Parkway, Houston, Harris County, TX

328

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

329

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

330

Spacetime Exterior to a Star: Against Asymptotic Flatness  

E-print Network

In many circumstances the perfect fluid conservation equations can be directly integrated to give a Geometric-Thermodynamic equation: typically that the lapse $N$ is the reciprocal of the enthalphy $h$, ($ N=1/h$). This result is aesthetically appealing as it depends only on the fluid conservation equations and does not depend on specific field equations such as Einstein's. Here the form of the Geometric-Thermodynamic equation is derived subject to spherical symmetry and also for the shift-free ADM formalism. There at least three applications of the Geometric-Thermodynamic equation, the most important being to the notion of asympotic flatness and hence to spacetime exterior to a star. For asymptotic flatness one wants $h\\to 0$ and $N\\to 1$ simultaneously, but this is incompatible with the Geometric-Thermodynamic equation. Observational data and asymptotic flatness are discussed. It is argued that a version of Mach's principle does not allow asymptotic flatness.

Mark D. Roberts

1998-11-28

331

GENERAL EXTERIOR VIEW, LOOKING NORTHEAST, OF THE SURFACE PLANT WITH ...  

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

GENERAL EXTERIOR VIEW, LOOKING NORTHEAST, OF THE SURFACE PLANT WITH CONVEYORS. JIM WALTER RESOURCES INC. MINING DIVISION OPERATES FOUR UNDERGROUND COAL MINES IN THE BLUE CREEK COAL FIELD OF BIRMINGHAM DISTRICT, THREE IN TUSCALOOSA COUNTY AND ONE IN JEFFERSON COUNTY. TOTAL ANNUAL PRODUCTION IS 8,000,000 TONS. AT 2,300 DEEP, JIM WALTER'S BROOKWOOD MINES ARE THE DEEPEST UNDERGROUND COAL MINES IN NORTH AMERICA. THEY PRODUCE A HIGH-GRADE MEDIUM VOLATILE LOW SULPHUR METALLURGICAL COAL. THE BROOKWOOD NO. 5 MINE (PICTURED IN THIS PHOTOGRAPH) EMPLOYS THE LONGWALL MINING TECHNIQUES WITH BELTS CONVEYING COAL FROM UNDERGROUND OPERATIONS TO THE SURFACE. - JIm Walter Resources, Incorporated, Brookwood No. 5 Mine, 12972 Lock 17 Road, Brookwood, Tuscaloosa County, AL

332

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

333

In country farms, as in people, a plain exterior can reveal hidden riches.  

E-print Network

1 In country farms, as in people, a plain exterior can reveal hidden riches. Aldo Leopold, Round River In country farms, as in people, a plain exterior can reveal hidden riches. Aldo Leopold, Round: · Improved understanding of animal husbandry & farming · Substantial increases in the use of fertilizers

Johnson, Matthew

334

Synthesis and sound quality evaluation of exterior and interior aircraft noise  

Microsoft Academic Search

This paper discusses a noise synthesis methodology that is used to analyze the sound perception characteristics of interior and exterior aircraft noise. The synthesis approach is based on a decomposition of measured or calculated aircraft noise responses in design-relevant components. For exterior noise, these can be the broadband and individual tonal contributions from engines and airframe, for interior noise, these

K. Janssens; A. Vecchio; H. Van der Auweraer

2008-01-01

335

PyDEC: Software and Algorithms for Discretization of Exterior Calculus  

E-print Network

.8 [Numerical Analysis]: Par- tial Differential Equations--Finite element methods, finite volume methods; I.3 and objects that arise in discrete exterior calculus, lowest-order finite element exterior calculus extend to arbitrary dimension. As a result, our implementations map well to the facilities of numerical

Hirani, Anil N.

336

49 CFR 238.303 - Exterior calendar day mechanical inspection of passenger equipment.  

Code of Federal Regulations, 2011 CFR

...2011-10-01 2011-10-01 false Exterior calendar day mechanical inspection of passenger...Passenger Equipment § 238.303 Exterior calendar day mechanical inspection of passenger...mechanical inspection at least once each calendar day that the equipment is placed in...

2011-10-01

337

49 CFR 238.303 - Exterior calendar day mechanical inspection of passenger equipment.  

Code of Federal Regulations, 2012 CFR

...2012-10-01 2012-10-01 false Exterior calendar day mechanical inspection of passenger...Passenger Equipment § 238.303 Exterior calendar day mechanical inspection of passenger...mechanical inspection at least once each calendar day that the equipment is placed in...

2012-10-01

338

49 CFR 238.303 - Exterior calendar day mechanical inspection of passenger equipment.  

Code of Federal Regulations, 2010 CFR

...2010-10-01 2010-10-01 false Exterior calendar day mechanical inspection of passenger...Passenger Equipment § 238.303 Exterior calendar day mechanical inspection of passenger...mechanical inspection at least once each calendar day that the equipment is placed in...

2010-10-01

339

49 CFR 238.303 - Exterior calendar day mechanical inspection of passenger equipment.  

Code of Federal Regulations, 2013 CFR

...2013-10-01 2013-10-01 false Exterior calendar day mechanical inspection of passenger...Passenger Equipment § 238.303 Exterior calendar day mechanical inspection of passenger...mechanical inspection at least once each calendar day that the equipment is placed in...

2013-10-01

340

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

341

Molecular cloud shredding in the Galactic Bar  

NASA Astrophysics Data System (ADS)

Seen just outside the innermost regions of the galactic center, the kinematics of molecular gas are dominated by a handful of compact but unusually broad-lined features of enigmatic origin. We show, using previous data, that there is a family of such features whose members are distinguished morphologically by their extreme vertical extension, perpendicular to the inclined plane of the overall gas tilt. Having isolated the features spatially, we mapped them with varying degrees of completeness at high resolution (1´) in lines of 12CO, 13CO and CS. Although very broad profiles exist in some individual beams, more generally we resolved the kinematics into spatial gradients which earlier were smeared in broader beams to form wider lines. The largest apparent velocity gradients are typically with respect to galactic latitude but motions are confined to the range of velocities inside the galactic terminal velocity, indicating that it is the galactic gravitational potential which is being tapped to create the observed kinematics. We interpret the broad-lined features qualitatively in terms of recent hydrodynamical models of gas flow in strongly barred galaxies: standing shocks which occur where gas enters the Galactic dust lane can account for the presence of broad lines over small spatial volumes wherever molecular gas is actually engaged in this process. To interpret the dynamical sequencing of the complex behaviour seen within the broad-line features we discuss how the Sun must be oriented with respect to the bar. In doing so, we identify the nuclear star-forming rings seen in other galaxies with the complex of giant H II regions Sgr A, B, C etc. and show that the kinematics are as expected for a ring of radius 175 pc (for a Sun-center distance of 8.5 kpc) rotating at about 210 km s-1. Gas having clear and strong outward-directed non-circular motion around l=0° (the famous "expanding molecular ring") is then associated with the "spray" of incoming gas at the inner ends of the dust lane, defining a more nearly end-on viewing angle for the bar. Using the inferred geometry, we construct a narrative for the behaviour of the feature most completely mapped here, at l = 5.4°, whereby gas basically falls out of the sky and is concentrated into the observed dense, bright molecular core before being shredded and sucked into the inflow of the dust lane 100 pc or more below the nominal galactic equator. From there it is recycled and lifted back into the more nearly equatorial region of the nuclear ring. Of course, the vertical structure of this and the other features, and the overall tilt of the dust lane and inner-galaxy gas layer, all remain to be discussed theoretically.

Liszt, H. S.

2006-02-01

342

Galactic gamma-ray distribution - implications for galactic structure and the radial cosmic-ray gradient  

SciTech Connect

The radial distribution of gamma ray emissivity in the Galaxy was derived from flux longitude profiles, using both the final SAS-2 results and the recently corrected COS-B results and analyzing the northern and southern galactic regions separately. The recent CO surveys of the Southern Hemisphere were used in conjunction with the Northern Hemisphere data, to derive the radial distribution of cosmic rays on both sides of the galactic plane. In addition to the 5 kpc ring, there is evidence from the radial asymmetry for spiral features which are consistent with those derived from the distribution of bright H II regions. Positive evidence was also found for a strong increase in the cosmic ray flux in the inner Galaxy, particularly in the 5 kpc region in both halves of the plane. 39 references.

Harding, A.K.; Stecker, F.W.

1985-04-01

343

The galactic gamma-ray distribution: Implications for galactic structure and the radial cosmic ray gradient  

NASA Technical Reports Server (NTRS)

The radial distribution of gamma ray emissivity in the Galaxy was derived from flux longitude profiles, using both the final SAS-2 results and the recently corrected COS-B results and analyzing the northern and southern galactic regions separately. The recent CO surveys of the Southern Hemisphere, were used in conjunction with the Northern Hemisphere data, to derive the radial distribution of cosmic rays on both sides of the galactic plane. In addition to the 5 kpc ring, there is evidence from the radial asymmetry for spiral features which are consistent with those derived from the distribution of bright HII regions. Positive evidence was also found for a strong increase in the cosmic ray flux in the inner Galaxy, particularly in the 5 kpc region in both halves of the plane.

Harding, A. K.; Stecker, F. W.

1984-01-01

344

Galactic gamma-ray distribution: implications for galactic structure and the radial cosmic ray gradient  

SciTech Connect

The radial distribution of gamma ray emissivity in the Galaxy was derived from flux longitude profiles, using both the final SAS-2 results and the recently corrected COS-B results and analyzing the northern and southern galactic regions separately. The recent CO surveys of the Southern Hemisphere, were used in conjunction with the Northern Hemisphere data, to derive the radial distribution of cosmic rays on both sides of the galactic plane. In addition to the 5 kpc ring, there is evidence from the radial asymmetry for spiral features which are consistent with those derived from the distribution of bright HII regions. Positive evidence was also found for a strong increase in the cosmic ray flux in the inner Galaxy, particularly in the 5 kpc region in both halves of the plane.

Harding, A.K.; Stecker, F.W.

1984-11-01

345

Cassini Imaging of Noncircular Features in Saturn's Rings  

NASA Astrophysics Data System (ADS)

We report on our initial examination of some of the eccentric features in Saturn's rings observed in Cassini imaging sequences. High-resolution movies and 360-degree azimuthal imaging scans, with radial spatial scales as fine as a few km and longitudinal resolutions as fine as a fraction of a degree, reveal the shapes of these features in great detail. The outer edges of the B ring, anchored by the strongest resonance in Saturn's rings -- the Mimas 2:1 inner Lindblad resonance (ILR) -- shows high-frequency radial departures from a simple m=2 shape, as previously found in Voyager data [1] but now seen with greater precision. The outer edge of the A ring, controlled by the Janus/Epimetheus 7:6 ILR, also appears to depart from the simple m=7 sinusoidal shape expected for this model [1]. High- spatial-frequency azimuthal variability has also been seen in other ring edges throughout the rings and in greater detail in the known narrow eccentric ringlets inhabiting the gaps in Saturn's rings, such as the Huygens gap exterior to the B ring and the Maxwell gap in the C ring, and in newly discovered, more tenuous rings seen in these gaps. The shape of the F-ring core is largely consistent with that determined by Bosh et al. [2], though at fine scales it is highly time-variable (see Chavez et al. and Charnoz et al., this conference). [1] Porco et al., 1984; Icarus 60, 17. [2] Bosh et al., 2002; Icarus 157, 57.

Spitale, J. N.; Porco, C. C.; Baker, E.; Tiscareno, M.; Burns, J. A.

2005-08-01

346

Multiple rings around Wolf-Rayet evolution  

NASA Technical Reports Server (NTRS)

We present optical narrow-band imaging of multiple rings existing around galactic Wolf-Rayet (WR) stars. The existence of multiple rings of material around Wolf-Rayet stars clearly illustrates the various phases of evolution that massive stars go through. The objects presented here show evidence of a three stage evolution. O stars produce an outer ring with the cavity being partially filled by ejecta from a red supergiant of luminous blue variable phase. A wind from the Wolf-Rayet star then passes into the ejecta materials. A simple model is presented for this three stage evolution. Using observations of the size and dynamics of the rings allows estimates of time scales for each stage of the massive star evolution. These are consistent with recent theoretical evolutionary models. Mass estimates for the ejecta, from the model presented, are consistent with previous ring nebula mass estimates from IRAS data, showing a number of ring nebulae to have large masses, most of which must in be in the form of neutral material. Finally, we illustrate how further observations will allow the determination of many of the parameters of the evolution of massive stars such as total mass loss, average mass loss rates, stellar abundances, and total time spent in each evolutionary phase.

Marston, A. P.

1995-01-01

347

Formation of Galactic Disks  

E-print Network

We review progress in understanding the formation of galactic disks in the standard cosmogonic scenario involving gravitational clustering of baryons and dark matter and dissipative collapse of the baryons. This scenario accounts remarkably well for the observed properties of galactic disks if they have retained most of the specific angular momentum they acquired by tidal torques. Early simulations, which included cooling of the gas but not star formation and the associated feedback, indicated instead that most of the angular momentum of the baryons would be transferred to the dark matter. Recent simulations indicate that this angular-momentum problem can be solved partially, and in some cases entirely, by feedback and other effects.

S. Michael Fall

2002-03-27

348

Metal concentrations in aggregate interiors, exteriors, whole aggregates, and bulk of Costa Rican soils  

SciTech Connect

In many temperate soils the preferential weathering and leaching of aggregate surfaces and the nonaggregated material between aggregates depletes geogenic metals. It also shifts metals from strongly to more weakly bound metal forms. Deposited metals are sorbed preferentially on aggregate surfaces and between aggregates. The authors examined whether preferential desilication under tropical climate causes an enrichment in the aggregate exteriors in oxidic forms of metals. They also studied where deposited metals are bound in these soils. Aggregates (2--20 mm) were selected manually from the A horizons of eight Oxisols, six Andisols, two Mollisols, and two Inceptisols in Costa Rica. All samples were fractionated into interior and exterior portions and treated with a seven-step sequence to extract Al, Cd, Cu, Fe, Mn, Pb, and Zn. Total concentrations of all metals except Zn were higher in the aggregate exteriors than in the interiors. The average Cd and Pb concentrations in easily extractable fractions were significantly higher in the aggregate exteriors. There were no significant differences in metal partitioning between interiors and exteriors except for Pb, which had higher proportions in extractable forms with NH{sub 2}OH {center{underscore}dot} HCl {gt} NH{sub 4} - acetate, pH 6.0 {gt} EDTA in the exteriors. There were few significant differences in metal concentrations and partitioning between bulk soil and whole aggregates. The results may be explained by (i) preferential desilication of the aggregate exteriors and (ii) preferential sorption of deposited heavy metals mainly in easily extractable forms.

Wilcke, W.; Kretzschmar, S.; Bundt, M.; Zech, W.

1999-10-01

349

FDDI Ring Demonstration  

NSDL National Science Digital Library

This applet demonstrates an FDDI ring. Users may add or delete stations (or computers) from the ring. The applet allows the user to show data being circulated around the ring. Users may also select to demonstrate the cases when the ring becomes broken or when one of the stations is switched off. (UNC E-Learning Grant)

2007-01-23

350

Stirling engine piston ring  

DOEpatents

A piston ring design for a Stirling engine wherein the contact pressure between the piston and the cylinder is maintained at a uniform level, independent of engine conditions through a balancing of the pressure exerted upon the ring's surface and thereby allowing the contact pressure on the ring to be predetermined through the use of a preloaded expander ring.

Howarth, Roy B. (Clifton Park, NY)

1983-01-01

351

New Dust Belts of Uranus: One Ring, Two Ring, Red Ring, Blue Ring  

SciTech Connect

We compare near-infrared observations of the recently discovered outer rings of Uranus with HST results. We find that the inner ring, R/2003 U 2, is red, whereas the outer ring, R/2003 U 1, is very blue. Blue is an unusual color for rings; Saturn's enigmatic E ring is the only other known example. By analogy to the E ring, R/2003 U 1 is probably produced via impacts into the embedded moon Mab, which apparently orbits at a location where non-gravitational perturbations favor the survival and spreading of sub-micron sized dust. R/2003 U 2 more closely resembles Saturn's G ring.

de Pater, I; Hammel, H B; Gibbard, S G; Showalter, M R

2006-02-02

352

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

SciTech Connect

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 distributions 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

353

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

354

Implications of the IRAS survey for galactic gamma-ray astronomy. [Milky way  

SciTech Connect

Using the results of the IRAS far-infrared survey of the Galaxy, we have obtained the large scale radial distributions of galactic far infrared emission independently for both the northern and southern hemisphere sides of the Galaxy. We find the dominant feature in these distributions to be a broad peak coincident with the 5 kpc'' molecular gas cloud ring. We also find evidence of spiral arm features. Strong correlations are evident between the large scale galactic distributions of far infrared emission, {gamma}-ray emission and CO emission. We find a particularly tight correlation between the distribution of warm molecular clouds and far-infrared emission on a galactic scale.

Stecker, F.W.; Harding, A.K.; Skibo, J. (Laboratory for High Energy Astrophysics, NASA/Goddard Space Flight Center, Greenbelt, Maryland 20771 (US))

1991-04-05

355

Implications of the IRAS survey for Galactic gamma-ray astronomy  

NASA Technical Reports Server (NTRS)

Using the results of the IRAS far-infrared survey of the Galaxy, we have obtained the large-scale radial distributions of Galactic far infrared emission independently for both the Northern and Southern Hemisphere sides of the Galaxy. We find the dominant feature in these distributions to be a broad peak coincident with the '5 kpc' molecular gas cloud ring. We also find evidence of spiral arm features. Strong correlations are evident between the large scale Galactic distributions of far infrared emission, gamma-ray emission and CO emission. We find a particularly tight correlation between the distribution of warm molecular clouds and far-infrared emission on a Galactic scale.

Stecker, F. W.; Harding, A. K.; Skibo, J.

1991-01-01

356

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

357

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

358

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.

1991-05-01

359

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

360

Brane-world stars with a solid crust and vacuum exterior  

NASA Astrophysics Data System (ADS)

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

Ovalle, Jorge; Gergely, László Á.; Casadio, Roberto

2015-02-01

361

Exterior detail of the north end double doors U.S. ...  

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

Exterior detail of the north end double doors - U.S. Naval Base, Pearl Harbor, Paint & Oil Storage, Near intersection of Avenue E & Seventh Street, adjacent to Facility Nos. 3A & 56, Pearl City, Honolulu County, HI

362

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

363

BRIDGE BUILDER WILLIAM FLINN?S ?CAMP & BRIDGE BUILDING OUTFIT?. EXTERIOR ...  

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

BRIDGE BUILDER WILLIAM FLINN?S ?CAMP & BRIDGE BUILDING OUTFIT?. EXTERIOR VIEW. - Clear Fork of Brazos River Suspension Bridge, Spanning Clear Fork of Brazos River at County Route 179, Albany, Shackelford County, TX

364

OBLIQUE/EXTERIOR VIEW, FRONT (WEST) ELEVATION ALONG CEDAR STREET OF A ...  

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

OBLIQUE/EXTERIOR VIEW, FRONT (WEST) ELEVATION ALONG CEDAR STREET OF A DOUBLE TWO-ROOM COTTAGE WITH CLASSICALLY-STYLED SIDE PORCHES AND ADJOINING RESIDENCE. - Tennessee Coal & Iron Worker Housing, Off Birmingport Road (AL 269), Birmingham, Jefferson County, AL

365

Impact of Fixed Exterior Shading on Daylighting: A Case Study of the David Brower Center  

E-print Network

in managing visual comfort than the manually-controlledvisual and thermal discomfort in sunlit perimeter spaces. Exterior shading is typically supplemented with manually-visual and thermal comfort by blocking direct sun throughout much of the year (Figure 9). Manually-

Zelenay, Krystyna

2011-01-01

366

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

367

5. Historic American Buildings Survey Exterior photocopy from C.M. Pepper, ...  

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

5. Historic American Buildings Survey Exterior photocopy from C.M. Pepper, Everyday Life in Washington (1900, p. 371) - Robert P. Dodge House, 1534 Twenty-eighth Street Northwest, Washington, District of Columbia, DC

368

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

369

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

370

OBLIQUE/EXTERIOR VIEW, FRONT (NORTH) ELEVATION WITH THREE ENTRANCES TO FORMER ...  

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

OBLIQUE/EXTERIOR VIEW, FRONT (NORTH) ELEVATION WITH THREE ENTRANCES TO FORMER COMPANY MEAT, GROCERY AND DRY GOODS OPERATIONS. - Mulga Commisary, Off AL 269 at I 20-59, Birmingham, Jefferson County, AL

371

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

372

FACILITIES - VISITORS INFORMATION CENTER [VIC] EXTERIOR EXHIBIT OF LUNAR MODULE SCALE MODEL  

NASA Technical Reports Server (NTRS)

FACILITIES - VISITORS INFORMATION CENTER [VIC] EXTERIOR EXHIBIT OF LUNAR MODULE SCALE MODEL KSC-367-0337.01 105-KSC-367-337.1, P-01600, ARCHIVE-04453 Visitor Information Center - scale model Lunar Orbiter.

1967-01-01

373

2. T12, exterior overall view, view from just outside the ...  

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

2. T-12, exterior overall view, view from just outside the security fence looking southeast. Lyon - Whiteman Air Force Base, Minuteman Missile Launch Facility Trainer T-12, Northeast of Oscar-01 Missile Alert Facility, Knob Noster, Johnson County, MO

374

Improvement of Exterior Orientation of Mars Express HRSC Imagery Using a Photogrammetric Block  

Microsoft Academic Search

The HRSC imaged neighboring strips forming a block. The exterior orientation of this data is investigated for using the nominal orientation, the improved orientation with single strips, and the improved orientation adjusted in a block.

M. Spiegel; R. Schmidt; U. Stilla; G. Neukum

2007-01-01

375

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

376

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

377

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

378

Exterior spacetime for stellar models in five-dimensional Kaluza Klein gravity  

NASA Astrophysics Data System (ADS)

It is well known that Birkhoff's theorem is no longer valid in theories with more than four dimensions. Thus, in these theories the effective four-dimensional picture allows the existence of different possible, non-Schwarzschild, scenarios for the description of the spacetime outside of a spherical star, contrary to four-dimensional general relativity. We investigate the exterior spacetime of a spherically symmetric star in the context of Kaluza Klein gravity. We take a well-known family of static spherically symmetric solutions of the Einstein equations in an empty five-dimensional universe, and analyse possible stellar exteriors that are conformal to the metric induced on four-dimensional hypersurfaces orthogonal to the extra dimension. We show that all these non-Schwarzschild exteriors can continuously be matched with the interior of the star, indicating that the matching conditions at the boundary of a star do not require an unique exterior. Then, without making any assumptions about the interior solution, we prove the following statement: the condition that in the weak-field limit we recover the usual Newtonian physics singles out an unique exterior. This exterior is 'similar' to a Scharzschild vacuum in the sense that it has no effect on gravitational interactions. However, it is more realistic because instead of being absolutely empty, it is consistent with the existence of quantum zero-point fields (Wesson 1992 Phys. Essays, Orion 5 591). We also examine the question of how the deviation from the Schwarzschild vacuum exterior would affect the parameters of a neutron star. In the context of a model star of uniform density, we show that the general relativity upper limit M/R < 4/9 is significantly increased as we go away from the Schwarzschild vacuum exterior. We find that, in principle, the compactness limit of a star can be larger than 1/2, without being a black hole. The generality of our approach is also discussed.

Ponce de Leon, J.

2007-04-01

379

Simulations of Galactic Dynamos  

NASA Astrophysics Data System (ADS)

We review our current understanding of galactic dynamo theory, paying particular attention to numerical simulations both of the mean-field equations and the original three-dimensional equations relevant to describing the magnetic field evolution for a turbulent flow. We emphasize the theoretical difficulties in explaining non-axisymmetric magnetic fields in galaxies and discuss the observational basis for such results in terms of rotation measure analysis. Next, we discuss nonlinear theory, the role of magnetic helicity conservation and magnetic helicity fluxes. This leads to the possibility that galactic magnetic fields may be bi-helical, with opposite signs of helicity and large and small length scales. We discuss their observational signatures and close by discussing the possibilities of explaining the origin of primordial magnetic fields.

Brandenburg, Axel

380

Thermographic method for evaluation of thermal influence of exterior surface colour of buildings  

NASA Astrophysics Data System (ADS)

Architecture colour is an important part in urban designing. It directly affects the expressing and the thermal effect of exterior surface of buildings. It has proved that four factors affect the sign visibility, graphics, colour, lighting condition and age of the observers, and colour is the main aspect. The best method is to prevent the exterior space heating up in the first place, by reflecting heat away room the exterior surface.The colour of paint to coat building's exterior wall can have a huge impact on energy efficiency. While the suitable colour is essential to increasing the energy efficiency of paint colour during the warm summer months, those products also help paint colour efficiency and reduce heat loss from buildings during winter months making the interior more comfortable all year long. The article is based on analyzing the importance of architecture color design and existing urban colour design. The effect of external surface colour on the thermal behaviour of a building has been studied experimentally by Infrared Thermographic method in University of Science and technology Beijing insummer.The experimental results showed that different colour has quietly different thermal effect on the exterior surface of buildings. The thermal effect of carmine and fawn has nearly the same values. The main factor which is color express, give some suggest ting about urban color design. The investigation reveals that the use of suitable surface colour can dramatically reduce maximum the temperatures of the exterior wall. Keywords: architectural colour, thermal, thermographic

Wu, Yanpeng; Li, Deying; Jin, Rendong; Liu, Li; Bai, Jiabin; Feng, Jianming

2008-12-01

381

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

382

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

383

On Weakly Finite Conductor Rings  

Microsoft Academic Search

We define a weakly finite conductor rings with zero divisors, and examine the transfer of these rings to the trivial ring extensions. These results provide examples of a weakly finite conductor rings that are not finite conductor rings (and so not coherent rings). The last section show that the class of weakly finite conductor rings and the class of 2-coherent

Najib Mahdou

2004-01-01

384

Removing a Ring Safely  

MedlinePLUS

... Hand Safety Fireworks Lawnmowers Snowblowers Pumpkin Carving Gardening Turkey Carving Removing a Ring Hand and Arm Conditions ... Hand Safety Fireworks Lawnmowers Snowblowers Pumpkin Carving Gardening Turkey Carving Removing a Ring Hand and Arm Conditions ...

385

New dust belts of Uranus: one ring, two ring, red ring, blue ring.  

PubMed

We compared near-infrared observations of the recently discovered outer rings of Uranus with Hubble Space Telescope results. We find that the inner ring, R/2003 U 2, is red, whereas the outer ring, R/2003 U 1, is very blue. Blue is an unusual color for rings; Saturn's enigmatic E ring is the only other known example. By analogy to the E ring, R/2003 U 1 is probably produced by impacts into the embedded moon Mab, which apparently orbits at a location where nongravitational perturbations favor the survival and spreading of submicron-sized dust. R/2003 U 2 more closely resembles Saturn's G ring, which is red, a typical color for dusty rings. PMID:16601188

de Pater, Imke; Hammel, Heidi B; Gibbard, Seran G; Showalter, Mark R

2006-04-01

386

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

387

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)

388

Rings Around Uranus  

ERIC Educational Resources Information Center

Events leading up to the discovery of the rings of Uranus are described. The methods used and the logic behind the methods are explained. Data collected to prove the existence of the rings are outlined and theories concerning the presence of planetary rings are presented. (AJ)

Maran, Stephen P.

1977-01-01

389

Structure of Saturn's Rings from Cassini Diametric Radio Occultations  

NASA Astrophysics Data System (ADS)

Cassini orbits around Saturn were designed to provide eight optimized radio occultation observations of Saturn's rings during summer, 2005. Three monochromatic radio signals (0.94, 3.6, and 13 cm-wavelength) were transmitted by Cassini through the rings and observed at multiple stations of the NASA Deep Space Network. A rich data set has been collected. Detailed structure of Ring B is revealed for the first time, including multi-feature dense ''core'' ˜ 6,000 km wide of normal optical depth > 4.3, a ˜ 5,500 km region of oscillations in optical depth ( ˜ 1.7 to ˜ 3.4) over characteristic radial scales of few hundred kilometers interior to the core, and a ˜ 5,000 km region exterior to the core of similar nature but smaller optical depth fluctuation ( ˜ 2.2 to ˜ 3.3). The innermost ˜ 7,000 km region is the thinnest (mean optical depth ˜ 1.2), and includes two unusually uniform regions and a prominent density wave. With few exceptions, the structure is nearly identical for the three radio signals (when detectable), indicating that Ring B is relatively devoid of centimeters and smaller size particles. The structure is largely circularly symmetric, except for radius > ˜ 116,600 km. In Ring A, numerous (> 40) density waves are clearly observed at multiple longitudes, different average background optical depth is observed among different occultations suggesting that the azimuthal asymmetry extends over most Ring A, and strong dependence of the observed structure on wavelength implies increase in the abundance of centimeter and smaller size particles with increasing radius. Multiple longitude observations of Ring C and the Cassini Division structure reveal remarkable variability of gaps and their embedded narrow eccentric ringlets, and a wake/wave like feature interior to the gap at ˜ 118,200 km (embedded moonlet?). Wavelength dependent structure of Ring C implies abundance of centimeter size particles everywhere and sorting by size within dense embedded features.

Marouf, E.; French, R.; Rappaport, N.; Kliore, A.; Flasar, M.; Nagy, A.; McGhee, C.; Schinder, P.; Anabtawi, A.; Asmar, S.; Barbinis, E.; Fleischman, D.; Goltz, G.; Johnston, D.; Rochblatt, D.; Thomson, F.; Wong, K.

2005-08-01

390

The slice Burnside ring and the section Burnside ring  

E-print Network

The slice Burnside ring and the section Burnside ring Burnside rings for a finite group G* *, called the slice Burnside ring and the section Burnside ring shown that these two rings have a natural structure of Green biset functor. The* * functorial structure

Bouc, Serge

391

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.

392

Electron-ion recombination measurements of Fe7+ motivated by active galactic nuclei x-ray  

E-print Network

electron-ion recombination rate coefficients for iron ions with partially filled M- shells are incorrectElectron-ion recombination measurements of Fe7+ , Fe8+ , Fe13+ motivated by active galactic nuclei was measured employing the electron-ion merged beams method at the Heidelberg heavy-ion storage-ring TSR

Savin, Daniel Wolf

393

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

394

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

395

Saturn's largest ring.  

PubMed

Most planetary rings in the Solar System lie within a few radii of their host body, because at these distances gravitational accelerations inhibit satellite formation. The best known exceptions are Jupiter's gossamer rings and Saturn's E ring, broad sheets of dust that extend outward until they fade from view at five to ten planetary radii. Source satellites continuously supply the dust, which is subsequently lost in collisions or by radial transport. Here we report that Saturn has an enormous ring associated with its outer moon Phoebe, extending from at least 128R(S) to 207R(S) (Saturn's radius R(S) is 60,330 km). The ring's vertical thickness of 40R(S) matches the range of vertical motion of Phoebe along its orbit. Dynamical considerations argue that these ring particles span the Saturnian system from the main rings to the edges of interplanetary space. The ring's normal optical depth of approximately 2 x 10(-8) is comparable to that of Jupiter's faintest gossamer ring, although its particle number density is several hundred times smaller. Repeated impacts on Phoebe, from both interplanetary and circumplanetary particle populations, probably keep the ring populated with material. Ring particles smaller than centimetres in size slowly migrate inward and many of them ultimately strike the dark leading face of Iapetus. PMID:19812546

Verbiscer, Anne J; Skrutskie, Michael F; Hamilton, Douglas P

2009-10-22

396

Prüfer Conditions in Commutative Rings  

Microsoft Academic Search

This article explores several extensions of the Prüfer domain notion to rings with zero divisors. These extensions include\\u000a semihereditary rings, rings with weak global dimension less than or equal to 1, arithmetical rings, Gaussian rings, locally\\u000a Prüfer rings, strongly Prüfer rings, and Prüfer rings. The renewed interest in these properties, due to their connection to\\u000a Kaplansky’s Conjecture, has resulted in

Sarah Glaz; Ryan Schwarz

397

Thermodynamic and FTIR studies of supercooled water confined to exterior and interior of mesoporous MCM-41.  

PubMed

The thermal properties of water confined to both exterior and interior of cylindrical mesoporous MCM-41 (pore diameter d = 1.8-3.6 nm) were analysed by differential scanning calorimetry and FTIR spectroscopy. A three-step freezing of the exterior water was observed just above 233 K, the homogeneous nucleation temperature of bulk water, before the interior water was frozen. The first freezing of water was ascribed to the outermost bulk water, the second one to water between bulk and water bound to the exterior wall, and the third one to the bound exterior water. With decreasing pore size, the second freezing water decreased in magnitude. This stepwise freezing of the exterior water has been found in porous zeolite materials. The exothermic peak of the interior water confined in MCM-41 was observed at 227.5 K before freezing, ascribed probably to a high-density liquid-low-density liquid phase change. FTIR data of the interior water confirmed this finding. The present results substantiate the static and dynamic crossover of supercooled water in MCM-41 reported from previous neutron scattering and NMR data. PMID:19774285

Kittaka, Shigeharu; Sou, Kalyan; Yamaguchi, Toshio; Tozaki, Ken-ichi

2009-10-14

398

Role of exterior and evolutionary skew-symmetric differential forms in mathematical physics  

E-print Network

A role of skew-symmetric differential forms in mathematical physics relates to the fact that they reflect the properties of conservation laws. The closed exterior forms correspond to the conservation laws for physical fields, whereas the evolutionary forms correspond to the conservation laws for material media. Skew-symmetric differential forms can describe a conjugacy of any objects (that correspond to the conservation laws). The closed exterior forms describe conjugated objects. And the evolutionary forms, whose basis are deforming manifolds, describe the process of conjugating objects and obtaining conjugated objects. From the evolutionary forms the closed exterior forms are obtained. This shows that material media generate physical fields. The relation between evolutionary and closed exterior forms discloses the relation between the equations of mathematical physics and field theories. This explains the field theory postulates. Conjugacy is possible if there is symmetry. Symmetries of closed exterior forms, which are conditions of fulfilment of the conservation laws for physical fields, are interior symmetries of field theories. And symmetries of dual forms (due to the degrees of freedom of material media) are external symmetries of the equations of field theories. This shows connection between internal and external symmetries of field theories.

L. I. Petrova

2005-10-21

399

Galactic cosmic rays and nucleosynthesis  

SciTech Connect

The nucleosynthesis of the light elements Li, Be and B by galactic cosmic rays is presented. Observations of cosmic rays and the nuclear reactions responsible for Li, Be and B nucleosynthesis are described, followed by some words on propagation. At the end, some open questions concerning galactic cosmic rays are discussed.

Kiener, Juergen [CSNSM, CNRS-IN2P3 and Universite Paris-Sud, Bat. 104-108, 91405 Orsay Campus (France)

2010-03-01

400

Testing Galactic Cosmic Ray Models  

NASA Technical Reports Server (NTRS)

Models of the Galactic Cosmic Ray Environment are used for designing and planning space missions. The exising models will be reviewed. Spectral representations from these models will be compared with measurements of galactic cosmic ray spectra made on balloon flights and satellite flights over a period of more than 50 years.

Adams, James H., Jr.

2010-01-01

401

Testing Galactic Cosmic Ray Models  

NASA Technical Reports Server (NTRS)

Models of the Galactic Cosmic Ray Environment are used for designing and planning space missions. The existing models will be reviewed. Spectral representations from these models will be compared with measurements of galactic cosmic ray spectra made on balloon flights and satellite flights over a period of more than 50 years.

Adams, James H., Jr.

2009-01-01

402

The Galactic Center Magnetosphere  

E-print Network

The magnetic field within a few hundred parsecs of the center of the Galaxy is an essential component of any description of that region. The field has several pronounced observational manifestations: 1) morphological structures such as nonthermal radio filaments (NTFs) -- magnetic flux tubes illuminated by synchrotron emission from relativistic electrons -- and a remarkable, large-scale, helically wound structure, 2) relatively strong polarization of thermal dust emission from molecular clouds, presumably resulting from magnetic alignment of the rotating dust grains, and 3) synchrotron emission from cosmic rays. Because most of the NTFs are roughly perpendicular to the Galactic plane, the implied large-scale geometry of the magnetic field is dipolar. Estimates of the mean field strength vary from tens of microgauss to ~ a milligauss. The merits and weaknesses of the various estimations are discussed here. If the field strength is comparable to a milligauss, then the magnetic field is able to exert a strong influence on the dynamics of molecular clouds, on the collimation of a Galactic wind, and on the lifetimes and bulk motions of relativistic particles. Related to the question of field strength is the question of whether the field is pervasive throughout the central zone of the Galaxy, or whether its manifestations are predominantly localized phenomena. Current evidence favors the pervasive model.

Mark Morris

2007-01-02

403

Galactic polarization surveys  

E-print Network

Following the detection of polarized diffuse Galactic emission in 1962 a number of surveys were undertaken at low frequencies in the following years resulting in important insights on the local magnetic field, polarization of the giant radio loops and other Galactic structures, as well as on the properties of the diffuse magnetized interstellar medium. This field of research experienced a revival in the eighties and nineties by a number of high resolution observations at low and high frequencies, which showed a large variety of polarization structures having no corresponding signature in the total intensity images. 'Canals' and 'Faraday screens' were reported, which clearly indicate that Faraday rotation in the magneto-ionic medium may largely vary on small scales. These findings called for a systematic approach and a number of new unbiased polarization surveys were started. Also new attempts for absolute calibration are under way, which is a critical issue when interpreting polarization structures. This paper reviews polarization survey projects and also summarizes recent results and interpretations of this rather active field of research.

Wolfgang Reich

2006-03-17

404

The dynamics of galactic WARPS and bulges  

NASA Astrophysics Data System (ADS)

This dissertation explores the link between self-gravitating galactic warps and tilted bulges. Published observations of stellar warps suggest that most optically detected warps occur in galaxies with small bulges. In addition, some bulges appear to be tilted away from the disk plane. This non-negligible bulge contribution has not been included in previous work on galactic warps. I have investigated the dynamics of introducing a bulge into bending mode calculations. My models consist of a freely-tilting, solid body bulge of fixed shape that spins about its symmetry axis, a self gravitating exponential disk made up of thin, rigid rings, and an axisymmetric, massive halo potential. The freely-moving bulge adds a new, discrete retrograde mode. This 'bulge' mode allows smoothly-truncated disk galaxies to support warping modes without the assistance of an oblate halo, expanding the number of realistic galactic systems in which discrete warping modes can exist. The shape and appearance of the warp depends on the mass, flattening, spin rate, and effective radius of the bulge. The bulge itself 'takes part' in the warp by tipping relative to the inner disk. The exact amount of tip depends on the bulge parameters. Disk-bulge-halo systems can have two discrete modes of warping in the form of both the modified tilt mode and the 'bulge' mode. Both of these modes must be considered when fitting models to observations. My results demonstrate the importance of taking the bulge contribution to the galactic gravitational field into account before using warps to constrain any dark matter halo distribution. I have successfully fit dynamical models that are consistent with observations of M31's warp and bulge tip. Deprojection of M31's geometry indicates that its bulge tips roughly 18 deg with respect to the inner disk plane of the galaxy. Using two different mass models (with and without a massive halo), I show that the warp and bulge tip in M31 are best fit by a 'bulge' mode, and that the bulge, and not a flattened halo, appears to be responsible for the warp in this galaxy.

Pitesky, Jo Eliza

405

Dust and Planetary Rings  

NASA Astrophysics Data System (ADS)

ABSTRACT Space is not empty it has comic radiations (CMBR), dust etc. Cosmic dust is that type of dust which is composed of particles in space which vary from few molecules to 0.1micro metres in size. This type of dust is made up of heavier atoms born in the heart of stars and supernova. Mainly it contains dust grains and when these dust grains starts compacting then it turns to dense clouds, planetary ring dust and circumstellar dust. Dust grains are mainly silicate particles. Dust plays a major role in our solar system, for example in zodiacal light, Saturn's B ring spokes, planetary rings at Jovian planets and comets. Observations and measurements of cosmic dust in different regions of universe provide an important insight into the Universe's recycling processes. Astronomers consider dust in its most recycled state. Cosmic dust have radiative properties by which they can be detected. Cosmic dusts are classified as intergalactic dusts, interstellar dusts and planetary rings. A planetary ring is a ring of cosmic dust and other small particles orbiting around a planet in flat disc shape. All of the Jovian planets in our solar system have rings. But the most notable one is the Saturn's ring which is the brightest one. In March 2008 a report suggested that the Saturn's moon Rhea may have its own tenuous ring system. The ring swirling around Saturn consists of chunks of ice and dust. Most rings were thought to be unstable and to dissipate over course of tens or hundreds of millions of years but it now appears that Saturn's rings might be older than that. The dust particles in the ring collide with each other and are subjected to forces other than gravity of its own planet. Such collisions and extra forces tend to spread out the rings. Pluto is not known to have any ring system but some Astronomers believe that New Horizons probe might find a ring system when it visits in 2015.It is also predicted that Phobos, a moon of Mars will break up and form into a planetary ring. Many theories are present regarding the formation of rings for example when moons collide, when moon breaks up and due to dust formation in supernova. But the most important question is, that how they maintain their orbit and why they are present there.

Siddiqui, Muddassir

406

Implementation of exterior complex scaling in B-splines to solve atomic and molecular collision problems  

NASA Astrophysics Data System (ADS)

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; Martín, Fernando

2004-02-01

407

Venting gas appliances into exterior masonry chimneys: Analysis and recommendations. Topical report, February 1993-February 1994  

SciTech Connect

The higher residential appliance efficiency levels prescribed by the National Applicance Energy Conservation Act of 1987 increase the potential for condensation-related problems in gas appliance venting systems. National guidelines address the venting of modern gas appliances into interior chimneys and vents. The performance of exterior chimneys, however, depends largely on the local climate. The objective of the report is to provide a technical basis for developing guidelines for avoiding excessive condensation when venting gas appliances into exterior masonry chimneys. The VENT-II computer program was used to evaluate the performance of exterior chimneys under a wide range of conditions, including application type, appliance efficiency, appliance operating characteristics, and chimney size. To account for variations in local climatic conditions, the DOE heating regions for the U.S. were used in the analysis.

Philips, D.B.; Rutz, A.L.; Whitacre, G.R.; Talbert, S.G.

1994-06-01

408

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

409

Evaluating an Exterior Insulation and Finish System for Deep Energy Retrofits  

SciTech Connect

Exterior insulation and finish systems (EIFS) are proprietary synthetic formulations that are applied to the exterior walls of buildings to serve as insulation and exterior cladding. The insulation thickness can vary from less than one inch to a foot or more. In this project the applicability of EIFS for residential deep energy retrofits was investigated through modeling and a case study home. The home was retrofitted using a site-applied four-inch-thick EIFS. Site-specific details were developed as required for the residential retrofit application. Site work and the costs of the EIFS system were documented. The demonstration home was modeled using Building Energy Optimization energy and cost analysis software to explore cost effectiveness of various EIFS insulation thicknesses in two climate locations.

Dentz, J.; Podorson, D.

2014-01-01

410

Traceable Ring Signature  

NASA Astrophysics Data System (ADS)

The ring signature allows a signer to leak secrets anonymously, without the risk of identity escrow. At the same time, the ring signature provides great flexibility: No group manager, no special setup, and the dynamics of group choice. The ring signature is, however, vulnerable to malicious or irresponsible signers in some applications, because of its anonymity. In this paper, we propose a traceable ring signature scheme. A traceable ring scheme is a ring signature except that it can restrict “excessive” anonymity. The traceable ring signature has a tag that consists of a list of ring members and an issue that refers to, for instance, a social affair or an election. A ring member can make any signed but anonymous opinion regarding the issue, but only once (per tag). If the member submits another signed opinion, possibly pretending to be another person who supports the first opinion, the identity of the member is immediately revealed. If the member submits the same opinion, for instance, voting “yes” regarding the same issue twice, everyone can see that these two are linked. The traceable ring signature can suit to many applications, such as an anonymous voting on a BBS. We formalize the security definitions for this primitive and show an efficient and simple construction in the random oracle model.

Fujisaki, Eiichiro; Suzuki, Koutarou

411

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

412

Galactic antiprotons from photinos  

NASA Technical Reports Server (NTRS)

Stable photinos, the photino being the supersymmetry partner of the photon, can explain both the 'missing mass' in galactic halos and the cosmic-ray antiproton spectrum up to the highest energies observed so far. This requires a photino mass around 15 GeV; significantly higher masses are cosmologically disfavored. As a consequence, the observed cosmic-ray antiproton-to-proton ratio is predicted to decrease abruptly just above the measured energy range, at E = m(x). If observed, this striking effect would strongly support the hypothesis that photinos make up the missing matter in the galaxy and also lead to a measurement of the photino mass from cosmic-ray data.

Stecker, F. W.; Rudaz, S.; Walsh, T. F.

1985-01-01

413

Galactic Dark Matter  

NASA Astrophysics Data System (ADS)

The precise phase-space distribution and properties of Galactic dark matter necessary for its direct and indirect detection are currently unknown. Since the distributions of normal and dark matter in the Milky Way are coupled to each other as they both move in the same gravitational potential, constraints on the distribution and properties of dark matter can be derived by studying the distribution of visible matter in the Galaxy and making some general assumptions regarding the phase-space distribution of the dark matter. In this study, the visible components of the Galaxy have been comprehensively reviewed to create an axisymmetric model of the Galaxy that is consistent with the available observations, and the dark matter phase-space distribution is assumed to follow a lowered-isothermal form. Poisson's equations are then solved self-consistently to construct models of the spatial and velocity distribution of Galactic dark matter. The total gravitational potential from normal and dark matter are calculated and compared to the current observations of the rotation curve and to the radial velocity distributions of blue horizontal-branch and blue straggler stars. It is found that this analysis allows for a wide range of parameters for the dark matter. The implications for direct and indirect detection of dark matter are discussed in detail. In the appendices, two additional projects are presented. In Appendix A, the recent observations of the positron fraction and the total electron spectrum in cosmic rays are addressed by considering a nested leaky-box model for the propagation of cosmic rays in the Galaxy. This is found to obviate the need for exotic processes such as the annihilation or decay of dark matter to explain the recent observations. In Appendix B, we discuss a novel dark matter detector involving triggered cavitation in acoustic fields. The theory behind the detector is presented in detail, and we discuss the work than has been done to create a prototype at Washington University.

Burch, Benjamin P.

414

The Planetary Rings Node  

NSDL National Science Digital Library

The Planetary Rings Node of the Planetary Data System is devoted to archiving, cataloging and distributing scientific data sets relevant to planetary ring systems. In addition to data sets, this site offers on-line tools for planning, acquiring and interpreting ring observations and downloadable routines for calculations of orbital motion and time conversions. There are also images, animations and artwork of Jupiter, Saturn, Uranus, and Neptune.

415

Thymoma with ring calcification.  

PubMed

A 59-year-old man was referred to our department for evaluation of an asymptomatic abnormal mediastinal shadow detected on chest roentgenogram. Computed tomography (CT) of the chest showed an anterior mediastinal tumor with ring calcification. Thymectomy through a median sternotomy was performed. Pathologic examination showed an encapsulated type B2 thymoma with ring calcification. Microscopically, the calcified layer was within the fibrous capsule layer. A part of the fibrous capsule was thought to become calcified like a ring. Although focal calcification is sometimes found in thymomas, ring calcification is rare. PMID:25468089

Sano, Atsushi; Kawashima, Mitsuaki

2014-12-01

416

Atlas of Saturn's rings  

NASA Technical Reports Server (NTRS)

A preliminary summary is made from a compilation of Voyager Saturn ring data. The data base includes optical thickness radial profiles at 3.6 and 13.6 cm radio wavelength measurements, 1300 and 2640 A occultations of delta Sco, albedos in the 3000-6000 A range, time and azimuthal resolved albedo profiles, particle impacts in the G ring, and number densities of magnetospheric charged particles. Sample data tracks are provided for the A, C, and D rings and the Cassini division. Finally, the trajectory of the Voyager 2 pass through the ring system is plotted.

Collins, S. A.; Diner, J.; Garneau, G. W.; Lane, A. L.; Miner, E. D.; Synnott, S. P.; Terrile, R. J.; Holberg, J. B.; Smith, B. A.; Tyler, G. L.

1984-01-01

417

The annihilation of galactic positrons  

NASA Technical Reports Server (NTRS)

The probabilities of various channels of galactic positron annihilation were evaluated and the spectrum of the resulting radiation was calculated. The narrow width (FWHM less than 3.2 keV) of the 0.511 MeV line observed from the galactic center 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. HII regions at the galactic center could be possible sites of annihilation.

Bussard, R.; Rematy, R.

1978-01-01

418

Some statistics of Galactic SNRs  

E-print Network

The selection effects applicable to the identification of Galactic supernova remnants (SNRs) at radio wavelengths are discussed. Low surface brightness remnants are missing, as are those with small angular sizes (including young but distant SNRs). Several statistical properties of Galactic SNRs are discussed, including the surface-brightness/diameter (Sigma-D) relation. The wide range of intrinsic properties of Galactic remnants with known distances, and the observational selection effects, means that the Sigma-D relation is of limited use to derive diameters and hence distances for individual SNRs, or for statistical studies.

D. A. Green

2005-05-20

419

The galactic gamma-ray distribution - Implications for galactic structure and the radial cosmic-ray gradient  

NASA Technical Reports Server (NTRS)

The radial distribution of gamma ray emissivity in the Galaxy was derived from flux longitude profiles, using both the final SAS-2 results and the recently corrected COS-B results and analyzing the northern and southern galactic regions separately. The recent CO surveys of the Southern Hemisphere were used in conjunction with the Northern Hemisphere data, to derive the radial distribution of cosmic rays on both sides of the galactic plane. In addition to the 5 kpc ring, there is evidence from the radial asymmetry for spiral features which are consistent with those derived from the distribution of bright H II regions. Positive evidence was also found for a strong increase in the cosmic ray flux in the inner Galaxy, particularly in the 5 kpc region in both halves of the plane.

Harding, A. K.; Stecker, F. W.

1985-01-01

420

Orientation of Galactic Bulge Planetary Nebulae toward the Galactic Center  

E-print Network

We have used the Wide Field Spectrograph on the Australian National University 2.3-m telescope to perform the integral field spectroscopy for a sample of the Galactic planetary nebulae. The spatially resolved velocity distributions of the H$\\alpha$ emission line were used to determine the kinematic features and nebular orientations. Our findings show that some bulge planetary nebulae toward the Galactic center have a particular orientation.

Danehkar, A

2014-01-01

421

Problem of Vain Energy Consumption in a VAV Air Conditioning System Shared By an Inner Zone and Exterior Zone  

E-print Network

In northern China, there are a large number of space buildings divided in inner zone and exterior zone based on usage requirements. The exterior zone needs to be heated in winter and cooled in summer, while the inner zone needs to be cooled both...

Wenji, G.; Ling, C.; Dongdong, L.; Mei, S.; Li, Z.

2006-01-01

422

The population of propellers in Saturn's A Ring  

E-print Network

We present an extensive data set of ~150 localized features from Cassini images of Saturn's Ring A, 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 meters. 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.

Matthew S. Tiscareno; Joseph A. Burns; Matthew M. Hedman; Carolyn C. Porco

2007-10-24

423

Finite element methods for the Helmholtz equation in an exterior domain - Model problems  

Microsoft Academic Search

Finite element methods are presented for the reduced wave equation in unbounded domains. Model problems of radiation with inhomogeneous Neumann boundary conditions, including the effects of a moving acoustic medium, are examined for the entire range of propagation and decay. Exterior boundary conditions for the computational problem over a finite domain are derived from an exact relation between the solution

Isaac Harari; Thomas J. R. Hughes

1991-01-01

424

Solution of Helmholtz Equation in the Exterior Domain by Elementary Boundary Integral Methods  

Microsoft Academic Search

In this paper elementary boundary integral equations for the Helmholtz equation in the exterior domain, based on Green's formula or through representation of the solution by layer potentials, are considered. Even when the partial differential equation has a unique solution, for any given closed boundary I, these elementary boundary integral equations can be shown to be singular at a countable

S. Amini; S. M. Kirkup

1995-01-01

425

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

426

Adaptive boundary element method of time-harmonic exterior acoustics in two dimensions  

Microsoft Academic Search

In this paper we carry out boundary element computations of the Helmholtz equation in two dimensions, in the context of time-harmonic exterior acoustics. The purpose is to demonstrate cost savings engendered through adaptivity for propagating solutions at moderate wave numbers. The computation are performed on meshes of constant boundary elements, and are adapted to the solution by locally changing element

J. T. Chen; K. H. Chen; C. T. Chen

2002-01-01

427

Sustainable wall construction and exterior insulation retrofit technology process and structure  

DOEpatents

A low-cost process for exterior wall insulation retrofit, or new wall construction by stacking layers of fabric tube filled with insulating material against a wall and covering them with mesh and stucco provides a durable structure with good insulating value.

Vohra, Arun (Bethesda, MD)

2000-01-01

428

Implementation of exterior complex scaling in B-splines to solve atomic and molecular collision problems  

Microsoft Academic Search

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

C. William McCurdy; Fernando Martin

2003-01-01

429

Theoretical treatment of double photoionization of helium using a B -spline implementation of exterior complex scaling  

Microsoft Academic Search

Calculations of absolute triple-differential and single-differential cross sections for helium double photoionization are performed using an implementation of exterior complex scaling in B -splines. Results for cross sections, well converged in partial waves, are presented and compared with both experiment and earlier theoretical calculations. These calculations establish the practicality and effectiveness of the complex B -spline approach to calculations of

C. W. McCurdy; D. A. Horner; T. N. Rescigno; F. Martín

2004-01-01

430

Implementation of exterior complex scaling in B-splines to solve atomic and molecular collision problems  

Microsoft Academic Search

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

C. William McCurdy; Fernando Martín

2004-01-01

431

149. ARAIII Reactor building (ARA608) Exterior elevations, showing north, south, ...  

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

149. ARA-III Reactor building (ARA-608) Exterior elevations, showing north, south, east, and west. Aerojet-general 880-area/GCRE-608-A-6. Date: February 1958. Ineel index code no. 063-0608-00-013-102615. - Idaho National Engineering Laboratory, Army Reactors Experimental Area, Scoville, Butte County, ID

432

LPT. Shield test facility (TAN646) exterior, as modified for EBOR. ...  

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

LPT. Shield test facility (TAN-646) exterior, as modified for EBOR. Camera facing northeast. Heat exchange fans, helium storage tanks, and completed EBOR perimeter road. Photographer: Page Comisky. Date: ca. August 20, 1965. INEEL negative no. 65-4328 - Idaho National Engineering Laboratory, Test Area North, Scoville, Butte County, ID

433

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

434

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

435

Initial and Long-Term Movement of Cladding Installed Over Exterior Rigid Insulation  

SciTech Connect

Changes in the International Energy Conservation Code (IECC) from 2009 to 2012 have resulted in the use of exterior rigid insulation becoming part of the prescriptive code requirements. With more jurisdictions adopting the 2012 IECC builders are going to finding themselves required to incorporate exterior insulation in the construction of their exterior wall assemblies. For thick layers of exterior insulation (levels greater than 1.5 inches), the use wood furring strips attached through the insulation back to the structure has been used by many contractors and designers as a means to provide a convenient cladding attachment location. However, there has been a significant resistance to its widespread implementation due to a lack of research and understanding of the mechanisms involved and potential creep effects of the assembly under the sustained dead load of a cladding. This research was an extension on previous research conducted by BSC in 2011, and 2012. Each year the understanding of the system discrete load component interactions, as well as impacts of environmental loading has increased. The focus of the research was to examine more closely the impacts of screw fastener bending on the total system capacity, effects of thermal expansion and contraction of materials on the compressive forces in the assembly, as well as to analyze a full years worth of cladding movement data from assemblies constructed in an exposed outdoor environment.

Baker, P.

2014-09-01

436

19. EXTERIOR VIEW OF BUILDING 24A (POWER BUILDING), LOOKING NORTH ...  

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

19. EXTERIOR VIEW OF BUILDING 24A (POWER BUILDING), LOOKING NORTH (1991). - Wright-Patterson Air Force Base, Area B, Buildings 25 & 24,10-foot & 20-foot Wind Tunnel Complex, Northeast side of block bounded by K, G, Third, & Fifth Streets, Dayton, Montgomery County, OH

437

Decaying Modes for the Wave Equation in the Exterior of an Obstacle  

Microsoft Academic Search

In this paper we study the dependence of the set of ‘exterior’ eigenvalues {?\\u000a k} of ? on the geometry of the obstacle ?. In particular we show that the real eigenvalues, corresponding to purely decaying modes, depend monotonically on the obstacle ?, both for the Dirichlet and Neumann boundary conditions. From this we deduce, by comparison with spheres—for which

P. D. Lax; R. S. Phillips

438

Model for Naturally Ventilated Cavities on the Exteriors of Opaque Building Thermal Envelopes  

SciTech Connect

This paper describes a model for naturally ventilated cavities on the exterior of opaque building thermal envelopes that are formed by the presence of a lightweight baffle. The model can be used for building components that are slightly detached from the main envelope (but do not connect to the interior).

Griffith, B.

2006-11-01

439

VIEW OF STATION SAXTON FACING NORTHEAST, SHOWING EXPOSED EXTERIOR,FRONT AND ...  

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

VIEW OF STATION SAXTON FACING NORTHEAST, SHOWING EXPOSED EXTERIOR,FRONT AND RIGHT SIDE OF THE CONCRETE CONCEALMENT. THE VISIBLE SANDSTONE FLANK-WALL ILLUSTRATES THE TYPICAL RELATIONSHIP OF THE FLANK WALLS TO THE VIEW APERTURE - White's Point Reservation, Base End Stations, B"2, Bounded by Voyager Circle & Mariner Drive, San Pedro, Los Angeles County, CA

440

Exterior view of south wall of Oxidizer Conditioning Structure (T28D), ...  

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

Exterior view of south wall of Oxidizer Conditioning Structure (T-28D), looking north. The taller structure immediately to the rear in the upper left background is the Long-Term Oxidizer Silo (T-28B) - Air Force Plant PJKS, Systems Integration Laboratory, Oxidizer Conditioning Structure, Waterton Canyon Road & Colorado Highway 121, Lakewood, Jefferson County, CO

441

3. Exterior view of LongTerm Hydrazine Silo (T28E), looking southwest. ...  

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

3. Exterior view of Long-Term Hydrazine Silo (T-28E), looking southwest. The low-lying building to the immediate left of the silo is the Fuel Purification Structure (T-28E). - Air Force Plant PJKS, Systems Integration Laboratory, Long-Term Hydrazine Silo, Waterton Canyon Road & Colorado Highway 121, Lakewood, Jefferson County, CO

442

Exterior view of west wall of LongTerm Oxidizer Silo (T28B) ...  

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

Exterior view of west wall of Long-Term Oxidizer Silo (T-28B) at left (taller structure) and adjacent Oxidizer Conditioning Structure (T-28D) at right (lower structure) - Air Force Plant PJKS, Systems Integration Laboratory, Long-Term Oxidizer Silo, Waterton Canyon Road & Colorado Highway 121, Lakewood, Jefferson County, CO

443

4. Exterior view of LongTerm Hydrazine Silo (T28E), looking west. ...  

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

4. Exterior view of Long-Term Hydrazine Silo (T-28E), looking west. The low-lying building to the immediate left of the silo is the Fuel Purification Structure (T-28E). - Air Force Plant PJKS, Systems Integration Laboratory, Long-Term Hydrazine Silo, Waterton Canyon Road & Colorado Highway 121, Lakewood, Jefferson County, CO

444

2. Exterior view of LongTerm Hydrazine Silo (T28E), looking east. ...  

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

2. Exterior view of Long-Term Hydrazine Silo (T-28E), looking east. The low-lying building to the immediate right of the silo is the Fuel Purification Structure T-28E). - Air Force Plant PJKS, Systems Integration Laboratory, Long-Term Hydrazine Silo, Waterton Canyon Road & Colorado Highway 121, Lakewood, Jefferson County, CO

445

Introduction This work is concerned with the exterior structural acoustics problem involving the  

E-print Network

Chapter 1 Introduction This work is concerned with the exterior structural acoustics problem involving the interaction of vibrating structures submerged in an infinite acoustic fluid and requires solution of the coupled wave equation subject to a far­field radiation condition. The acoustic fluid

Thompson, Lonny L.

446

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

447

Estimating building floor-plans from exterior using laser Matthew Johnston and Avideh Zakhor  

E-print Network

. This is contingent upon the existence of unobstructed windows made of glass for which the laser light passes throughEstimating building floor-plans from exterior using laser scanners Matthew Johnston and Avideh. We use a laser scanner to measure the range of hundreds of thousands of points on interior walls

Zakhor, Avideh

448

4. Exterior view of Components Test Laboratory (T27), looking northeast. ...  

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

4. Exterior view of Components Test Laboratory (T-27), looking northeast. The building wing on the left houses Test Cell 8 (oxidizer) and the oxidizer storage pit or vault, and that on the right houses Test Cell 10 (environmental). - Air Force Plant PJKS, Systems Integration Laboratory, Components Test Laboratory, Waterton Canyon Road & Colorado Highway 121, Lakewood, Jefferson County, CO

449

5. Exterior view of Components Test Laboratory (T27), looking northwest. ...  

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

5. Exterior view of Components Test Laboratory (T-27), looking northwest. The building wing on the left houses Test Cell 10 (environmental), and that on the right houses Test Cell 9 (fuel) and the fuel storage pit or vault. - Air Force Plant PJKS, Systems Integration Laboratory, Components Test Laboratory, Waterton Canyon Road & Colorado Highway 121, Lakewood, Jefferson County, CO

450

System Dynamics Model on the Relation between China's Logistics Industry and Its Exterior Service Circumstance  

Microsoft Academic Search

The development of China's logistics Industry has been affected by many factors in its exterior service circumstance, system dynamics method has been used to analyze the relationships of theirs from the new angle. Via this way, a systemic frame has been presented. We can get the result that logistics industry and some factors of its service circumstance, such as market

Chaoyuan Sun; Bin Shuai

2006-01-01

451

A survey of spatially distributed exterior dust lead loadings in New York City  

Microsoft Academic Search

This work documents ambient lead dust deposition values (lead loading) for the boroughs of New York City in 2003–2004. Currently, no regulatory standards exist for exterior concentrations of lead in settled dust. This is in contrast to the clearance and risk assessment standards that exist for interior residential dust. The reported potential for neurobehavioral toxicity and adverse cognitive development in

Jack Caravanos; Arlene L. Weiss; Marc J. Blaise; Rudolph J.. Jaeger

2006-01-01

452

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

453

Children of Sex Rings.  

ERIC Educational Resources Information Center

Outlines three major differentiating categories of children who were sexually abused by sex rings: level of fear, ability to trust, and disclosure confusion. Addresses denial and resistance regarding child sexual exploitation by a ring among practitioners in the child welfare system. (Author/BB)

Hunt, Patricia; Baird, Margaret

1990-01-01

454

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

455

On valuation rings  

Microsoft Academic Search

In this paper we provide necessary and sufficient conditions for $ R=A\\\\propto E $ to be a valuation ring where $E$ is a non-torsion or finitely generated $A-$module. Also, we investigate the $ (n,d) $ property of the valuation ring.

Mohammed Kabbour; Najib Mahdou

2009-01-01

456

ON VALUATION RINGS  

E-print Network

Abstract. In this paper we provide necessary and sufficient conditions for R = A ? E to be a valuation ring where E is a non-torsion or finitely generated A?module. Also, we investigate the (n, d) property of the valuation ring. 1.

Mohammed Kabbour; Najib Mahdou

457

On valuation rings  

E-print Network

In this paper we provide necessary and sufficient conditions for $ R=A\\propto E $ to be a valuation ring where $E$ is a non-torsion or finitely generated $A-$module. Also, we investigate the $ (n,d) $ property of the valuation ring.

Kabbour, Mohammed

2009-01-01

458

On Strong ( A )-Rings  

Microsoft Academic Search

In this paper, we introduce a strong property (A) as follows: A ring R is called satisfying strong property (A) if every finitely generated ideal of R which is generated by a finite number of zero-divisors elements of R, has a non zero annihilator. We study the transfer of property (A) and strong property (A) in trivial ring extensions and

Najib Mahdou; Aziza Rahmouni Hassani

459

On Valuation Rings  

Microsoft Academic Search

In this article, we provide necessary and sufficient conditions for R = A ? E to be a valuation ring where E is a non-torsion or finitely generated A-module. Also, we investigate the (n, d) property of the valuation ring.

Mohammed Kabbour; Najib Mahdou

2010-01-01

460

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, ...

461

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

462

Ices in planetary rings  

NASA Technical Reports Server (NTRS)

Understanding the structure and behavior of Saturnian rings in terms of properties of ices is basic for evolutionary planetology. The available information indicates the presence of quite pure, probably amorphous water ice in the form of medium-grained frost in a fairy castle structure with a low thermal inertia. Tidal forces and interparticle collisions lead to continuous break-up and re-formation of loose aggregates of smaller particles. Micrometeoroid bombardment and proton irradiation are important for explaining the mechanical and optical properties of the surfaces of ring particles. The transfer of angular momentum and mass among the rings should homogenize the chemical and structural characteristics of the ring ices. Uranian rings may be made of carbon-covered methane ice particles.

Smoluchowski, R.

1985-01-01

463

Galactic Cold Cores  

NASA Astrophysics Data System (ADS)

The aims of the project "Cold Cores" include the compilation of an extensive catalog of dense and cold interstellar dust clouds and the characterization of this source population at large scale in the Galaxy. The sources, which range from pre-stellar cores to already star-forming clouds, are being identified from the Planck satellite all-sky survey. With good coverage of sub-millimeter wavelengths, high sensitivity, and a spatial resolution comparable to that of IRAS satellite, Planck is ideal for this search. Herschel will be used for a more detailed study of some 150 Planck-detected target fields. The Herschel data, combined with ground based follow-up observations, are used to determine the evolutionary stages of the detected sources and to study their physical characteristics and dust properties. The Herschel results help us to better understand the initial phases of star formation and give a key to the statistical interpretation of the much larger sample of sources included in the Planck catalog. We describe the scientific goals of the project and show first results from Herschel Science Demonstration Phase observations. In the fields studied so far, observations have revealed isolated starless cores, cores with embedded sources, and cold dust clumps within regions of active star formation. Thus, the results already demonstrate the large variety of Galactic sources harboring cold dust.

Juvela, Mika; Ristorcelli, Isabelle

464

Physical Structure of Small Wolf-Rayet Ring Nebulae  

E-print Network

We have selected the seven most well-defined WR ring nebulae in the LMC (Br 2, Br 10, Br 13, Br 40a, Br 48, Br 52, and Br 100) to study their physical nature and evolutionary stages. New CCD imaging and echelle observations have been obtained for five of these nebulae; previous photographic imaging and echelle observations are available for the remaining two nebulae. Using the nebular dynamics and abundances, we find that the Br 13 nebula is a circumstellar bubble, and that the Br 2 nebula may represent a circumstellar bubble merging with a fossil main-sequence interstellar bubble. The nebulae around Br 10, Br 52, and Br 100 all show influence of the ambient interstellar medium. Their regular expansion patterns suggest that they still contain significant amounts of circumstellar material. Their nebular abundances would be extremely interesting, as their central stars are WC5 and WN3-4 stars whose nebular abundances have not been derived previously. Intriguing and tantalizing implications are obtained from comparisons of the LMC WR ring nebulae with ring nebulae around Galactic WR stars, Galactic LBVs, LMC LBVs, and LMC BSGs; however, these implications may be limited by small-number statistics. A SNR candidate close to Br 2 is diagnosed by its large expansion velocity and nonthermal radio emission. There is no indication that Br 2's ring nebula interacts dynamically with this SNR candidate.

You-Hua Chu; Kerstin Weis; Donald R. Garnett

1998-12-03

465

The Enceladus Ring  

NASA Technical Reports Server (NTRS)

[figure removed for brevity, see original site] The Enceladus Ring (labeled)

This excellent view of the faint E ring -- a ring feature now known to be created by Enceladus -- also shows two of Saturn's small moons that orbit within the ring, among a field of stars in the background.

The E ring extends from three to eight Saturn radii -- about 180,000 kilometers (118,000 miles) to 482,000 kilometers (300,000 miles). Its full extent is not visible in this view.

Calypso (22 kilometers, or 14 miles across) and Helene (32 kilometers, or 20 miles across) orbit within the E ring's expanse. Helene skirts the outer parts of the E ring, but here it is projected in front of a region deeper within the ring.

Calypso and Helene are trojan satellites, or moons that orbit 60 degrees in front or behind a larger moon. Calypso is a Tethys trojan and Helene is a trojan of Dione.

An interesting feature of note in this image is the double-banded appearance of the E-ring, which is created because the ring is somewhat fainter in the ringplane than it is 500-1,000 kilometers (300-600 miles) above and below the ringplane. This appearance implies that the particles in this part of the ring have nonzero inclinations (a similar affect is seen in Jupiter's gossamer ring). An object with a nonzero inclination does not orbit exactly at Saturn's ringplane. Instead, its orbit takes it above and below the ringplane. Scientists are not entirely sure why the particles should have such inclinations, but they are fairly certain that the reason involves Enceladus.

One possible explanation is that all the E ring particles come from the plume of icy material that is shooting due south out of the moon's pole. This means all of the particles are created with a certain velocity out of the ringplane, and then they orbit above and below that plane.

Another possible explanation is that Enceladus produces particles with a range of speeds, but the moon gravitationally scatters any particles that lie very close to the ringplane, giving them nonzero inclinations.

Stray light within the camera system is responsible for the broad, faint 'Y' shape across the image.

The image was taken in visible light with the Cassini spacecraft wide-angle camera on March 15, 2006, at a distance of approximately 2.4 million kilometers (1.5 million miles) from Saturn. The image scale on the sky at the distance of Saturn is 142 kilometers (88 miles) per pixel.

2006-01-01

466

Factors affecting piston ring friction  

E-print Network

The piston ring pack friction is a major contributor to the internal combustion engine mechanical friction loss. The oil control ring decides the oil supply to the top two rings in addition to being the major friction ...

Liao, Kai, Ph. D. Massachusetts Institute of Technology

2013-01-01

467

Earth: A Ringed Planet?  

NASA Astrophysics Data System (ADS)

Among the most beautiful findings of the Space Age have been the discoveries of planetary rings. Not only Saturn but also Jupiter, Uranus and Neptune have rings; Saturn’s ring system has structures newly discovered; even Saturn's moon Rhea itself has a ring. All these are apparently supplied by material from the planetary moons (Rhea's ring by Rhea itself). The question naturally arises, why should the Earth not have a ring, and on the other hand, if it does, why has it not been observed? No rings have yet been observed in the inner solar system, but after all, rings in the inner solar system might simply tend to be fainter and more transient than those of the outer solar system: the inner solar system is more affected by the solar wind, and the Sun’s perturbing gravitational influence is greater. J.A. O’Keefe first suggested (1980) that Earth might have a ring system of its own. An Earth ring could account for some climate events. O’Keefe remarked that formation or thickening of a ring system in Earth’s equatorial plane could drive glaciation by deepening the chill of the winter hemisphere. (It is very well established that volcanic dust is an effective agent for the extinction of sunlight; this factor can be overwhelmingly apparent in eclipse observations.) O’Keefe died in 2000 and the speculation was not pursued, but the idea of an Earth ring has a prima facie reasonableness that calls for its renewed consideration. The program of this note is to hypothesize that, as O’Keefe proposed: (a) an Earth ring system exists; (b) it affects Earth's weather and climate; (c) the tektite strewn fields comprise filaments of the ring fallen to Earth's surface on various occasions of disturbance by comets or asteroids. On this basis, and drawing on the world's weather records, together with the Twentieth Century Reanalysis by NCEP/CIRES covering the period 1870-2010 and the geology of the tektite strewn fields, we herein propose the hypothesized Earth ring system’s orbital elements and structure. Our work concludes that rings may exist in Earth’s equatorial plane and in the plane of the lunar orbit, that such rings are filamentary structures comprising segments of geologically homogeneous material flung into earth’s orbit at distinct periods of lunar volcanism, and that earth’s weather may indeed be very strongly affected by the rings. In closing, until the time of the lunar landing in 1969, the moon was considered geologically dead. But today, we have multiple lines of evidence that the Moon is still volcanically active. According to our study, this volcanism may affect weather and climate considerably. If lunar volcanism and weather on Earth are linked, then a satisfactory understanding of lunar volcanism is called for by considerations of human welfare. The subsistence farmer has an immediate need to know what is true about our Moon; food security depends on it.

Hancock, L. O.; Povenmire, H.

2010-12-01

468

Dynamics of the Uranian Rings  

NASA Technical Reports Server (NTRS)

Some of the problems of the shepherding satellite model of Goldreich ant tremaine are discussed. The following topics are studied: (1) optical depths of the all the observed narrow rings; (2) satellite and ring separation timescales; (3) ring edge sharpness; (4) shock formation in narrow rings; (5) the existence of small satellites near the Uranian rings; and (6) the apse and node alignments of the eccentric and inclined rings.

Dermott, S. F.

1984-01-01

469

Hot piston ring tests  

NASA Technical Reports Server (NTRS)

As part of the DOE/NASA Automotive Stirling Engine Project, tests were made at NASA Lewis Research Center to determine whether appendix gap losses could be reduced and Stirling engine performance increased by installing an additional piston ring near the top of each piston dome. An MTI-designed upgraded Mod I Automotive Stirling Engine was used. Unlike the conventional rings at the bottom of the piston, these hot rings operated in a high temperature environment (700 C). They were made of a high temperature alloy (Stellite 6B) and a high temperature solid lubricant coating (NASA Lewis-developed PS-200) was applied to the cylinder walls. Engine tests were run at 5, 10, and 15 MPa operating pressure over a range of operating speeds. Tests were run both with hot rings and without to provide a baseline for comparison. Minimum data to assess the potential of both the hot rings and high temperature low friction coating was obtained. Results indicated a slight increase in power and efficiency, an increase over and above the friction loss introduced by the hot rings. Seal leakage measurements showed a significant reduction. Wear on both rings and coating was low.

Allen, David J.; Tomazic, William A.

1987-01-01

470

Galactic Twins of the Nebula Around SN 1987A: Hints that LBVs may be supernova progenitors  

E-print Network

I discuss outstanding questions about the formation of the ring nebula around SN1987A and some implications of similar ring nebulae around Galactic B supergiants. There are notable obstacles for the formation of SN1987A's bipolar nebula through interacting winds in a transition from a red supergiant to a blue supergiant. Instead, several clues hint that the nebula may have been ejected in an LBV-like event. In addition to the previously known example of Sher25, there are two newly-discovered Galactic analogs of SN1987A's ringed nebula. Of these three Galactic analogs around blue supergiants, two (Sher25 and SBW1) have chemical abundances indicating that they have not been through a red supergiant phase, and the remaining ringed bipolar nebula surrounds a luminous blue variable (HD168625). Although SK-69 202's initial mass of 20 Msun is lower than those atributed to most LBVs, it is not far off, and the low-luminosity end of the LBV phenomenon is not well defined. Furthermore, HD168625's luminosity indicates an initial mass of only 25 Msun, that of SBW1 is consistent with 20 Msun, and there is a B[e] star in the SMC with an initial mass of 20 Msun that experienced an LBV outburst in the 1990s. These similarities may be giving us important clues about Sk-69 202's pre-SN evolution and the formation mechanism of its nebula.

Nathan Smith

2007-05-21

471

Heavy ion storage rings  

SciTech Connect

A brief overview of synchrotron storage rings for heavy ions, which are presently under construction in different accelerator laboratories is given. Ions ranging from protons up to uranium ions at MeV/nucleon energies will be injected into these rings using multiturn injection from the accelerators available or being built in these laboratories. After injection, it is planned to cool the phase space distribution of the ions by merging them with cold electron beams or laser beams, or by using stochastic cooling. Some atomic physics experiments planned for these rings are presented.

Schuch, R.

1987-01-01

472

Theodolite Ring Lights  

NASA Technical Reports Server (NTRS)

Theodolite ring lights have been invented to ease a difficulty encountered in the well-established optical-metrology practice of using highly reflective spherical tooling balls as position references. A theodolite ring light produces a more easily visible reflection and eliminates the need for an autocollimating device. A theodolite ring light is a very bright light source that is well centered on the optical axis of the instrument. It can be fabricated, easily and inexpensively, for use on a theodolite or telescope of any diameter.

Clark, David

2006-01-01

473

Rings and Radial Waves in the Disk of the Milky Way  

NASA Astrophysics Data System (ADS)

We show that in the anticenter region, between Galactic longitudes of 110? < l < 229?, there is an asymmetry in the main sequence star counts on either side of the Galactic plane using data from the Sloan Digital Sky Survey. This asymmetry oscillates from more stars in the north at distances of about 2 kpc from the Sun to more stars in the south at 4-6 kpc from the Sun to more stars in the north at distances of 8-10 kpc from the Sun. We also see evidence that there are more stars in the south at distances of 12-16 kpc from the Sun. The three more distant asymmetries form roughly concentric rings around the Galactic center, opening in the direction of the Milky Way’s spiral arms. The northern ring, 9 kpc from the Sun, is easily identified with the previously discovered Monoceros Ring. Parts of the southern ring at 14 kpc from the Sun (which we call the TriAnd Ring) have previously been identified as related to the Monoceros Ring and others have been called the Triangulum Andromeda Overdensity. The two nearer oscillations are approximated by a toy model in which the disk plane is offset by of the order 100 pc up and then down at different radii. We also show that the disk is not azimuthally symmetric around the Galactic anticenter and that there could be a correspondence between our observed oscillations and the spiral structure of the Galaxy. We suggest that the TriAnd and Monoceros Rings could be accreted satellites that form an outer disk. More complex modeling is necessary to understand the observations. This research is supported by the NSF grant AST 09-37523, and NSF China grant Nos. 11203030 and the National Key Basic Research Program of China 2014CB845703.

Newberg, Heidi Jo; Xu, Yan; Carlin, Jeffrey L.; Liu, Chao; Deng, Licai; Li, Jing; Schoenrich, Ralph; Yanny, Brian

2015-01-01

474

Galactic Halos of Hydrogen  

NASA Technical Reports Server (NTRS)

This image shows two companion galaxies, NGC 4625 (top) and NGC 4618 (bottom), and their surrounding cocoons of cool hydrogen gas (purple). The huge set of spiral arms on NGC 4625 (blue) was discovered by the ultraviolet eyes of NASA's Galaxy Evolution Explorer. Though these arms are nearly invisible when viewed in optical light, they glow brightly in ultraviolet. This is because they are bustling with hot, newborn stars that radiate primarily ultraviolet light.

The vibrant spiral arms are also quite lengthy, stretching out to a distance four times the size of the galaxy's core. They are part of the largest ultraviolet galactic disk discovered so far.

Astronomers do not know why NGC 4625 grew arms while NGC 4618 did not. The purple nebulosity shown here illustrates that hydrogen gas - an ingredient of star formation - is diffusely distributed around both galaxies. This means that other unknown factors led to the development of the arms of NGC 4625.

Located 31 million light-years away in the constellation Canes Venatici, NGC 4625 is the closest galaxy ever seen with such a young halo of arms. It is slightly smaller than our Milky Way, both in size and mass. However, the fact that this galaxy's disk is forming stars very actively suggests that it might evolve into a more massive and mature galaxy resembling our own.

The image is composed of ultraviolet, visible-light and radio data, from the Galaxy Evolution Explorer, the California Institute of Technology's Digitized Sky Survey, and the Westerbork Synthesis Radio Telescope, the Netherlands, respectively. Near-ultraviolet light is colored green; far-ultraviolet light is colored blue; and optical light is colored red. Radio emissions are colored purple.

2005-01-01

475

Galactic Habitable Orbits  

NASA Astrophysics Data System (ADS)

The fossil record shows that the Earth has experienced several mass extinctions over the past 500 million years1, and it has been suggested that there is a periodicity in extinction events on timescales of tens1 and/or hundreds of millions of years. Various hypotheses have been proposed to explain the cause of the mass extinctions, including the suggestion that the Earth's ozone layer may have been destroyed by intense radiation from a nearby supernovae2- 3, exposing the Earth's surface to damaging UV radiation. Recent observations of cores taken from the ocean floor revealed atoms of a very rare isotope of iron (60Fe) believed to have arrived on Earth around 2 million years ago as fallout from a nearby supernovae4. Astronomical evidence for that past supernovae was recently found in the debris of a young cluster of massive stars5, by tracing its past orbit, putting it at the right place at the right time to explain the mild extinction event. Here we report new high-resolution (both in space and time) N-body chemodynamical simulations (carried out with our novel code GCD+6) of the evolution of a model Milky Way Galaxy, tracing the orbit of èsun-like' stars over a 500 million year period, checking the proximity to supernovae throughout the history of the orbit and comparing the times when this occurs with past mass extinctions on Earth. We additionally explain the important effects of the spiral arm pattern, radial migration of stars and Galactic chemistry on habitability.

Rahimi, A.; Mao, S.; Kawata, D.

2014-03-01

476

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

477

Evolution in a Ring  

NSDL National Science Digital Library

This lesson engages students in critical thinking about ring species and how the process of speciation occurs. Students work on distribution maps, write news stories, consider What if? scenariosand more!

John Ausema (Gonzaga College High School;)

2005-07-01

478

Ringed-Carbon Compounds  

NSDL National Science Digital Library

In this interactive activity adapted from NOVA, learn about alkaloids and steroids, both examples of compounds with carbon rings. Short videos with interviews,animations, and photographs are featured.

WGBH Educational Foundation

2007-02-12

479

Noncommutative ring spectra  

E-print Network

Let A be an Ax ring spectrum. We give an explicit construction of topological Hochschild homology and cohomology of A using the Stasheff associahedra and another family of polyhedra called cyclohedra. Using this construction ...

Angeltveit, Vigleik

2006-01-01

480

Dusty plasma ring model  

NASA Astrophysics Data System (ADS)

A model of a dusty plasma (Yukawa) ring is presented. We consider n identical particles confined in a two-dimensional (2D) annular potential well and interacting through a Debye (i.e. Yukawa or screened Coulomb) potential. Equilibrium configurations are computed versus n, the Debye shielding parameter and the trap radius. When the particle separation exceeds a critical value the particles form a 1D chain with a ring topology. Below the critical separation the zigzag instability gives a 2D configuration. Computed critical separations are shown to agree well with a theoretical prediction for the zigzag threshold. Normal mode spectra for 1D rings are computed and found to be in excellent agreement with the longitudinal and transverse dispersion relations for unbounded straight chains. When the longitudinal and transverse dispersion relations intersect we observe a resonance due to the finite curvature of the ring.

Sheridan, T. E.

2009-12-01

481

Saturn's dynamic D ring  

USGS Publications Warehouse

The Cassini spacecraft has provided the first clear images of the D ring since the Voyager missions. These observations show that the structure of the D ring has undergone significant changes over the last 25 years. The brightest of the three ringlets seen in the Voyager images (named D72), has transformed from a narrow, <40-km wide ringlet to a much broader and more diffuse 250-km wide feature. In addition, its center of light has shifted inwards by over 200 km relative to other features in the D ring. Cassini also finds that the locations of other narrow features in the D ring and the structure of the diffuse material in the D ring differ from those measured by Voyager. Furthermore, Cassini has detected additional ringlets and structures in the D ring that were not observed by Voyager. These include a sheet of material just interior to the inner edge of the C ring that is only observable at phase angles below about 60??. New photometric and spectroscopic data from the ISS (Imaging Science Subsystem) and VIMS (Visual and Infrared Mapping Spectrometer) instruments onboard Cassini show the D ring contains a variety of different particle populations with typical particle sizes ranging from 1 to 100 microns. High-resolution images reveal fine-scale structures in the D ring that appear to be variable in time and/or longitude. Particularly interesting is a remarkably regular, periodic structure with a wavelength of ??? 30 ?? km extending between orbital radii of 73,200 and 74,000 km. A similar structure was previously observed in 1995 during the occultation of the star GSC5249-01240, at which time it had a wavelength of ??? 60 ?? km. We interpret this structure as a periodic vertical corrugation in the D ring produced by differential nodal regression of an initially inclined ring. We speculate that this structure may have formed in response to an impact with a comet or meteoroid in early 1984. ?? 2006 Elsevier Inc. All rights reserved.

Hedman, M.M.; Burns, J.A.; Showalter, M.R.; Porco, C.C.; Nicholson, P.D.; Bosh, A.S.; Tiscareno, M.S.; Brown, R.H.; Buratti, B.J.; Baines, K.H.; Clark, R.

2007-01-01

482

RFOFO RING COOLER.  

SciTech Connect

This note describes the design of an ionization cooling ring that uses an alternating polarity solenoid lattice. The ring is approximately 33 m in circumference and has 12 cells. Each cell has two opposing focusing solenoids placed either side of a hydrogen wedge absorber. The solenoid coils are located outside pillbox rf cavities. Bending is provided by tipping the solenoid coils. The simulated merit factor ({approx} the increase in 6D phase space density) is 81.

BERG,J.S.FERNOW,R.C.PALMER,R.B.

2002-07-01

483

Saturn Ring Observer  

NASA Astrophysics Data System (ADS)

In cooperation with NASA's Solar System Exploration Subcommittee and its working groups, JPL is studying planetary science missions proposed for launch near the end of the next decade. Results will focus resources on developing technologies that enable a set of missions in which extraordinary scientific advances reward meeting severe technological challenges. This paper describes Saturn Ring Observer, an innovative, chemical-propulsion-only approach to a previous mission concept that enables close-up observation of Saturn's rings to obtain fundamental new information about ring dynamics, some relevant to planetary system formation. It describes the mission's science goals, provided by the Astrophysical Analogs in the Solar System Campaign Strategy Working Group, and the resulting mission concept. The primary goal is understanding ring processes and evolution as a model for the origin of planetary systems. This involves direct observations of kinematic processes and parameters in the rings, direct observations of the physical nature and distribution of the particles, measuring local surface mass density over a wide radial range, and mapping the optical depth profile at high ( ~ 10 m) radial resolution and at several co-rotating longitudes. The ring opening angle as seen from the approaching spacecraft sets an arrival time window at Saturn. Saturn orbit insertion uses a single-pass aerocapture followed by direct insertion near the Huygens gap at apoapsis. The science mission concept calls for placing the spacecraft in a ring-particle-like orbit with a very small inclination; frequent small plane-change maneuvers enable `hovering' 3 +/- 0.5 km removed from the ring plane. One month of science operations follow insertion, with as many as four changes in radial position totaling several thousand km. This work was carried out at the Jet Propulsion Laboratory/California Institute of Technology, under contract to NASA.

Spilker, T. R.

2000-10-01

484

Observation of Chariklo's rings  

NASA Astrophysics Data System (ADS)

Dense and sharply confined rings have recently been discovered during a stellar occultation around the small Centaur object Chariklo (Braga-Ribas et al., 2014). This is the first body after the giant planets found to possess a ring system. We propose to use HST to (1) obtain direct images of the rings, confirming their existence and their orientation, (2) derive multi-wavelength photometry, thus constraining their composition (concerning in particular the presence of water ice), (3) perform for the first time a deep search of small satellites and (4) faint dusty rings around Chariklo, and (5) search for material around another Centaur similar to Chariklo, Chiron, which is known to be surrounded by cometary material and narrow jets. The presence (or absence) of satellites and dusty material around Chariklo will discriminate the various theoretical models that are invoked to explain the origin, evolution and stability of rings around this minor body. The motion of putative Chariklo satellites will also provide an estimation of the mass of the primary, from which its density can be derived, which eventually tells us where the rings are relative to Chariklo's Roche limit.

Sicardy, Bruno

2014-10-01

485

Utrecht and Galactic Radio Astronomy  

NASA Astrophysics Data System (ADS)

Important roles in early Dutch Galactic radio astronomy were played by several Utrecht astronomers: Van de Hulst, Minnaert and Houtgast. The poster announcing the conference contained a number of pictures referring to scientific achievements of the Astronomical Institute Utrecht. One of these (Figure 1) appears to show the spiral structure of our Galaxy. Detailed comparison with the famous H I map (Figure 2), published by Oort, Kerr, and Westerhout (1958) in their paper “The Galactic System as a Spiral Nebula”, indicates that both are based on the same data. However, the “OKW map” resulted from work done at Kootwijk, Leiden and Sydney. What claim does Utrecht have to this pinnacle of early Galactic Radio Astronomy? Let us trace the history behind this H I map, as sketched in more detail by Van Woerden & Strom (2006).

van Woerden, H.

2013-01-01

486

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

487

Measurement of the exterior convective film coefficient for windows in low-rise buildings  

SciTech Connect

The MoWiTT field facility is used to measure the convective film coefficient over the exterior surface of a window. The MoWiTT-measured data is compared to some commonly-used experimental and theoretical models. The comparison shows that the MoWiTT data disagrees with the previously used models such as the ASHRAE/DOE-2 model. The reasons for these disagreements are discussed. An experimental model, based on the MoWiTT data, is presented to correlate the film coefficient with the difference in temperatures of the exterior glass surface and the ambient, in the natural convection region, and with the site wind speed, in the forced convection region. The wind speed is considered both in windward and leeward hemispheres. The validity of the MoWiTT model for low-rise buildings is then discussed.

Yazdanian, M.; Klems, J.H. [Lawrence Berkeley Lab., CA (United States). Energy and Environmental Div.

1993-10-01

488

Energy performance and installation considerations for retrofitted exterior masonry wall insulation. Draft  

SciTech Connect

A field test involving eight single-family houses was performed during the summer of 1991 in Scottsdale, Arizona to evaluate the potential of reducing air-conditioning electricity consumption and demand by insulating their exterior masonry walls. The installation technique. Total per house costs to perform the installations ranged from $3610 to $4550. The average annual savings was estimated to be 491 kWh, or 9% of pre-retrofit consumption. Peak demands with and without insulation on the hottest day of an average weather year for Phoenix were estimated to be 4.26 and 3.61 kill, for a demand reduction of 0.65 kW (15%). We conclude that inclusion of exterior masonry wall insulation in conservation programs aimed at reducing air-conditioning electricity consumption and peak demand should be pursued in hot, dry climates.

Ternes, M.P.; Wilkes, K.E.

1992-11-01

489

Energy performance and installation considerations for retrofitted exterior masonry wall insulation  

SciTech Connect

A field test involving eight single-family houses was performed during the summer of 1991 in Scottsdale, Arizona to evaluate the potential of reducing air-conditioning electricity consumption and demand by insulating their exterior masonry walls. The installation technique. Total per house costs to perform the installations ranged from $3610 to $4550. The average annual savings was estimated to be 491 kWh, or 9% of pre-retrofit consumption. Peak demands with and without insulation on the hottest day of an average weather year for Phoenix were estimated to be 4.26 and 3.61 kill, for a demand reduction of 0.65 kW (15%). We conclude that inclusion of exterior masonry wall insulation in conservation programs aimed at reducing air-conditioning electricity consumption and peak demand should be pursued in hot, dry climates.

Ternes, M.P.; Wilkes, K.E.

1992-01-01

490

Structured Molecular Gas Reveals Galactic Spiral Arms  

NASA Astrophysics Data System (ADS)

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 13CO 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; Hasegawa, Tetsuo; Koda, Jin

2012-11-01

491

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

492

Explicit representation of Green function for 3Dimensional exterior Helmholtz equation  

E-print Network

We have constructed a sequence of solutions of the Helmholtz equation forming an orthogonal sequence on a given surface. Coefficients of these functions depend on an explicit algebraic formulae from the coefficient of the surface. Moreover, for exterior Helmholtz equation we have constructed an explicit normal derivative of the Dirichlet Green function. In the same way the Dirichlet-to-Neumann operator is constructed. We proved that normalized coefficients are uniformly bounded from zero.

P. Cruz; E. L. Lakshtanov

2007-09-12

493

A priori estimates for the Helmholtz equation with electromagnetic potentials in exterior domains  

E-print Network

We study the Helmholtz equation with electromagnetic-type perturbations, in the exterior of a domain, in dimension $n\\geq3$. We prove, by multiplier techniques in the sense of Morawetz, a family of a priori estimates from which the limiting absorption principle follows. Moreover, we give some standard applications to the absence of embedded eigenvalues and zero-resonances, under explicit conditions on the potentials.

Juan Antonio Barceló; Luca Fanelli; Alberto Ruiz; Maricruz Vilela

2011-05-15

494

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

495

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

496

5. Exterior view of LongTerm Hydrazine Silo (T28E), looking west. ...  

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

5. Exterior view of Long-Term Hydrazine Silo (T-28E), looking west. The low-lying building to the left of the silo is the Fuel Purification Structure (T-28E). A hydrazine tank is in the concrete truck well in the immediate foreground. - Air Force Plant PJKS, Systems Integration Laboratory, Long-Term Hydrazine Silo, Waterton Canyon Road & Colorado Highway 121, Lakewood, Jefferson County, CO

497

Exterior view of north wall of LongTerm Oxidizer Silo (T28B) ...  

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

Exterior view of north wall of Long-Term Oxidizer Silo (T-28B) and Oxidizer Conditioning Structure (T-28D) behind and to its immediate left, looking south. A nitrogen line, used to prepare the Titan II's nitrogen-tetroxide oxidizer, is in the right foreground - Air Force Plant PJKS, Systems Integration Laboratory, Long-Term Oxidizer Silo, Waterton Canyon Road & Colorado Highway 121, Lakewood, Jefferson County, CO

498

Exterior view of LongTerm Oxidizer Silo (T28D) in left background ...  

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

Exterior view of Long-Term Oxidizer Silo (T-28D) in left background (taller structure) and adjacent Oxidizer Conditioning Structure (T-28B) at extreme left background, looking south. At far right in foreground is a nitrogen tank in a concrete truck well - Air Force Plant PJKS, Systems Integration Laboratory, Long-Term Oxidizer Silo, Waterton Canyon Road & Colorado Highway 121, Lakewood, Jefferson County, CO

499

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

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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