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  1. Shmuel Friedland Univ. Illinois at Chicago

    E-print Network

    Friedland, Shmuel

    3-Tensors Shmuel Friedland Univ. Illinois at Chicago Geometry and Representation Theory of Tensors, MSRI July 18, 2008 Shmuel Friedland Univ. Illinois at Chicago () 3-Tensors Geometry and Representation Theory of Tens / 24 #12;Overview Shmuel Friedland Univ. Illinois at Chicago () 3-Tensors Geometry

  2. Shmuel Friedland Univ. Illinois at Chicago

    E-print Network

    Friedland, Shmuel

    Tensors Shmuel Friedland Univ. Illinois at Chicago University of Kansas, August 20, 2010 Shmuel Friedland Univ. Illinois at Chicago () Tensors University of Kansas, August 20, 2010 1 / 25 #12;Foreword to polynomial maps. Shmuel Friedland Univ. Illinois at Chicago () Tensors University of Kansas, August 20, 2010

  3. Shmuel Friedland Univ. Illinois at Chicago

    E-print Network

    Friedland, Shmuel

    Tensors Shmuel Friedland Univ. Illinois at Chicago Hong Kong Polytechnic University December 20, 2010 Shmuel Friedland Univ. Illinois at Chicago () Tensors Hong Kong Polytechnic UniversityDecember 2 are related to polynomial maps. Shmuel Friedland Univ. Illinois at Chicago () Tensors Hong Kong Polytechnic

  4. Conv^enio IMPA-Univ. Pierre et Marie Curie (Jussieu, Paris) Foi assinado recentemente um conv^enio entre o IMPA e a Universidade Pierre et Marie Curie

    E-print Network

    Moreira, Carlos Gustavo

    Conv^enio IMPA-Univ. Pierre et Marie Curie (Jussieu, Paris) Foi assinado recentemente um conv^enio entre o IMPA e a Universidade Pierre et Marie Curie (UPMC, Jussieu, Paris). Est~ao previstas atividades

  5. E Notes G. Sasaki, Univ. Hawaii 1 Digital Circuits Review

    E-print Network

    Sasaki, Galen H.

    E Notes G. Sasaki, Univ. Hawaii 1 Digital Circuits Review Combinational Circuits: No memory Output and current state Next state is dependent on input and current state E Notes G. Sasaki, Univ. Hawaii 2 Timing Diagram Boolean Expressions Hardware Description Languages #12;E Notes G. Sasaki, Univ. Hawaii 3

  6. 1synQPSK Univ. Paderborn, Germany; CeLight Israel; Photline, France; IPAG, Germany Univ. Paderborn, Germany

    E-print Network

    Noé, Reinhold

    1synQPSK Univ. Paderborn, Germany; CeLight Israel; Photline, France; IPAG, Germany synQPSK Univ. Paderborn, Germany CeLight Israel Photline, France IPAG, Germany Contract 004631 in FP6 IST-2002 Phase Shift Keying Transmission #12;2synQPSK Univ. Paderborn, Germany; CeLight Israel; Photline, France

  7. MSU Extended Unive presents Peaks & Potentials Camp

    E-print Network

    Lawrence, Rick L.

    MSU Extended Unive presents Peaks & Potentials Camp a fun, interactive and educational camp for high-potential kids entering grades 5, 6 and 7 in Fall 2014 June 15­20, 2014 Montana State University, bowling, racquetball, basketball or soccer. These activities are a great way to learn new games while

  8. MSU Extended Unive presents Peaks & Potentials Camp

    E-print Network

    Lawrence, Rick L.

    MSU Extended Unive presents Peaks & Potentials Camp a fun, interactive and educational camp for high-potential kids entering grades 5, 6 and 7 in Fall 2015 June 21­26, 2015 Montana State University, bowling, racquetball, basketball or soccer. These activities are a great way to learn new games while

  9. RENUCCI Antoine iae.univ-pau.fr

    E-print Network

    Greff, Isabelle

    Bayonneetàl'UniversitéParis-Dauphine. J'ai publié mes recherches dans le Journal of Corporate Finance, Oxford Economic Papers,Bank,MarketsandInvestors,PolitiquesetManagementRENUCCI Antoine iae.univ-pau.fr · Responsable du Master 1 Management de la santé, organisations sanitaires et médi- co-sociales bien-être et santé DOMAINE DE SPÉCIALITÉ : Finance, Capital-risque QUELQUES

  10. AO188 teamAO188 team SCExAO teamSCExAO team

    E-print Network

    Guyon, Olivier

    -AO development at Subaru imaging exo-Earths on ELTs Wide-field AO complements narrow-field ELTs (target [until ~2016] Vis imaging Single-mode fiber #12;13 SCExAO (summer 2013) Visible bench: ExAO WFS VAMPIRES FIRST (injection) Vis imaging Near-IR bench: ExAO correction (2000 act DM) Coronagraphy (PIAA, OVC etc

  11. http://dep-espagnol.univ-pau.fr LICENCE LANGUES, LITTRATURES,

    E-print Network

    Greff, Isabelle

    http://dep-espagnol.univ-pau.fr LICENCE LANGUES, LITT�RATURES, CIVILISATIONS �TRANG�RES ET@univ-pau.fr Inscriptions Les modalités d'inscription et le calendrier sont disponibles sur le site Web de l

  12. NMR-0Fessler, Univ. of Michigan Nuclear Magnetic Resonance Imaging

    E-print Network

    Fessler, Jeffrey A.

    NMR-0Fessler, Univ. of Michigan Nuclear Magnetic Resonance Imaging Jeffrey A. Fessler EECS Department The University of Michigan NSS-MIC: Fundamentals of Medical Imaging Oct. 20, 2003 #12;NMR-1Fessler, Univ. of Michigan Outline · Background · Basic physics · 4 magnetic fields · Bloch equation

  13. Universit Blaise Pascal Relations internationales www.univ-bpclermont.fr Enseignants responsables des changes internationaux

    E-print Network

    Sart, Remi

    Université Blaise Pascal ­ Relations internationales ­ www.univ-bpclermont.fr Enseignants.neiva@univ-bpclermont.fr #12;Université Blaise Pascal ­ Relations internationales ­ www.univ-bpclermont.fr > Filière Commerce ............................. Tél. 04 73 40 63 46 / serge.botet@univ-bpclermont.fr #12;Université Blaise Pascal ­ Relations

  14. Formation Secrtariat Mail Licence administation conomique et sociale Patricia Patout sec-aes@univ-avignon.fr

    E-print Network

    Avignon et des Pays de Vaucluse, Université de

    Formation Secrétariat Mail Licence administation économique et sociale Patricia Patout sec-aes@univ-avignon.fr Licence droit Catherine André sec-droit@univ-avignon.fr Licence géographie Martine Vidier sec-histoire-geo@univ-avignon.fr Licence histoire Viviane Oberrieder sec-histoire-geo@univ-avignon.fr Licence information communication

  15. Selecionados Dedu c ao

    E-print Network

    Barata, João Carlos Alves

    . . . . . . . . . . . . . . . . . . . . . . . . . . . . 894 20.3.1 A Evolu� c� ao da Temperatura de uma Barra Finita . . . . . . . . . . . . . . . . . . . . . . . . . 894 20.3.2 A Evolu� c� ao da Temperatura de uma Barra Infinita . . . . . . . . . . . . . . . . . . . . . . . . 898 20.3.3 A Evolu� c� ao da Temperatura de uma Barra Semi

  16. J. F. Adams, Algebraic Topology: a Student's Guide, Cambridge Univ. Press, 1972. J. F. Adams, Stable Homotopy and Generalised Homology, Univ. of Chicago Press, 1974.

    E-print Network

    Hatcher, Allen

    Books J. F. Adams, Algebraic Topology: a Student's Guide, Cambridge Univ. Press, 1972. J. F. Adams and Modules, Cambridge Univ. Press, 1992. D. J. Benson, Polynomial Invariants of Finite Groups, Cambridge Univ.M.S., 2008. J. Dieudonn´e, A History of Algebraic and Differential Topology 1900-1960, Birkh¨auser, 1989. A

  17. Cosmicflows Constrained Local UniversE Simulations

    NASA Astrophysics Data System (ADS)

    Sorce, Jenny G.; Gottlöber, Stefan; Yepes, Gustavo; Hoffman, Yehuda; Courtois, Helene M.; Steinmetz, Matthias; Tully, R. Brent; Pomarède, Daniel; Carlesi, Edoardo

    2016-01-01

    This paper combines observational data sets and cosmological simulations to generate realistic numerical replicas of the nearby Universe. The latter are excellent laboratories for studies of the non-linear process of structure formation in our neighbourhood. With measurements of radial peculiar velocities in the local Universe (cosmicflows-2) and a newly developed technique, we produce Constrained Local UniversE Simulations (CLUES). To assess the quality of these constrained simulations, we compare them with random simulations as well as with local observations. The cosmic variance, defined as the mean one-sigma scatter of cell-to-cell comparison between two fields, is significantly smaller for the constrained simulations than for the random simulations. Within the inner part of the box where most of the constraints are, the scatter is smaller by a factor of 2 to 3 on a 5 h-1 Mpc scale with respect to that found for random simulations. This one-sigma scatter obtained when comparing the simulated and the observation-reconstructed velocity fields is only 104 ± 4 km s-1, i.e. the linear theory threshold. These two results demonstrate that these simulations are in agreement with each other and with the observations of our neighbourhood. For the first time, simulations constrained with observational radial peculiar velocities resemble the local Universe up to a distance of 150 h-1 Mpc on a scale of a few tens of megaparsecs. When focusing on the inner part of the box, the resemblance with our cosmic neighbourhood extends to a few megaparsecs (<5 h-1 Mpc). The simulations provide a proper large-scale environment for studies of the formation of nearby objects.

  18. Subscriber access provided by DUKE UNIV Inorganic Chemistry is published by the American Chemical Society. 1155

    E-print Network

    Liu, Jie

    Subscriber access provided by DUKE UNIV Inorganic Chemistry is published by the American Chemical UNIV Inorganic Chemistry is published by the American Chemical Society. 1155 Sixteenth Street N.W., Washington, DC 20036 #12;Subscriber access provided by DUKE UNIV Inorganic Chemistry is published

  19. UBC 09 Upper-Level Course Transformation Univ. of Colorado A research-based approach to

    E-print Network

    Colorado at Boulder, University of

    UBC 09 Upper-Level Course Transformation Univ. of Colorado A research-based approach Transformation Univ. of Colorado CU Physics Education Research Physics faculty: Michael Dubson Noah Finkelstein STEM #12;UBC 09 Upper-Level Course Transformation Univ. of Colorado Why Transform E&M I? ? Can our

  20. Introduction to Computational Fluid Dynamics 424512 E #2 -rz maj 2015 bo Akademi Univ -Chemical Engineering

    E-print Network

    Zevenhoven, Ron

    .zevenhoven@abo.fi Introduction to Computational Fluid Dynamics 424512 E #2 - rz maj 2015 Åbo Akademi Univ - Chemical Engineering Dynamics 424512 E #2 - rz maj 2015 Åbo Akademi Univ - Chemical Engineering Thermal and Flow Engineering Introduction to Computational Fluid Dynamics 424512 E #2 - rz maj 2015 Åbo Akademi Univ - Chemical Engineering

  1. Une horloge communicante pour les seniors Equipe insitu, INRIA/LRI, Univ. Paris Sud

    E-print Network

    University of Queensland LRI, Bat.490 - Univ. Paris Sud 91400, Orsay, FRANCE yann.riche@lri.fr Wendy Mackay ´Equipe insitu, INRIA/LRI, Univ. Paris Sud LRI, Bat.490 - Univ. Paris Sud 91400, Orsay, FRANCE wendy, ou `a des syst`emes de surveillance `a domicile, comme les habitats intelligents [3] permettant aux

  2. H. R. Band, Univ. of Wisconsin! UCSC, May 1, 2012 ! 1! H.R. Band, University of Wisconsin!

    E-print Network

    California at Santa Cruz, University of

    H. R. Band, Univ. of Wisconsin! UCSC, May 1, 2012 ! 1! H.R. Band, University of Wisconsin! UCSC Disappearance at Daya Bay! 1! #12;H. R. Band, Univ. of Wisconsin! UCSC, May 1, 2012 ! 2! An International Effort Univ.! ! Europe (2)! Charles Univ., Dubna! Daya Bay Collaboration! ~230 collaborators! #12;H. R. Band

  3. 52. Photocopy of Photograph (original located in Univ. of Denver ...

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

    52. Photocopy of Photograph (original located in Univ. of Denver collection). C.R. Savage, Photographer, March, 1905. MILNER TUNNEL CLOSURE GATES AND GROUP. GROUP ON GATE PLATFORM JUST BEFORE LOWERING GATES. - Milner Dam & Main Canal: Twin Falls Canal Company, On Snake River, 11 miles West of city of Burley, Idaho, Twin Falls, Twin Falls County, ID

  4. 38. Photocopy of Photograph (original located in Univ. of Denver ...

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

    38. Photocopy of Photograph (original located in Univ. of Denver collection). C.R. Savage, Photographer, March, 1905. NORTH DAM AT MILNER DAM; NORTH VIEW, UPPER SLOPE OF MAIN CHANNEL DAM, DIRT FILL CONTINUING. - Milner Dam & Main Canal: Twin Falls Canal Company, On Snake River, 11 miles West of city of Burley, Idaho, Twin Falls, Twin Falls County, ID

  5. 41. Photocopy of Photograph (original located in Univ. of Denver ...

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

    41. Photocopy of Photograph (original located in Univ. of Denver collection). C.R. Savage, Photographer, March, 1905. NORTH DAM OF MILNER DAM; DOWNSTREAM AFTER TUNNEL CLOSURE; SILT BERM COMING THROUGH DAM. - Milner Dam & Main Canal: Twin Falls Canal Company, On Snake River, 11 miles West of city of Burley, Idaho, Twin Falls, Twin Falls County, ID

  6. 48. Photocopy of Photograph (original located in Univ. of Denver ...

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

    48. Photocopy of Photograph (original located in Univ. of Denver collection). C.R. Savage, Photographer, March, 1905. MILNER DAM; WEST VIEW ACROSS DAM FROM MIDDLE DAM; SNAKE RIVER EXITING FROM TUNNELS. - Milner Dam & Main Canal: Twin Falls Canal Company, On Snake River, 11 miles West of city of Burley, Idaho, Twin Falls, Twin Falls County, ID

  7. 75. Photocopy of Photograph (original located in Univ. of Denver ...

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

    75. Photocopy of Photograph (original located in Univ. of Denver collection). C.R. Savage, Photographer, March, 1905. SNAKE RIVER GOING DRY AT MILNER. POWER DITCH AT RIGHT; RIVER IN POOLS FOLLOWING GATE CLOSURE. - Milner Dam & Main Canal: Twin Falls Canal Company, On Snake River, 11 miles West of city of Burley, Idaho, Twin Falls, Twin Falls County, ID

  8. 66. Photocopy of Photograph (original located in Univ. of Denver ...

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

    66. Photocopy of Photograph (original located in Univ. of Denver collection). C.R. Savage, Photographer, March, 1905. MILNER DAM. CURRENT APPROACHING GATES, UPSTREAM. - Milner Dam & Main Canal: Twin Falls Canal Company, On Snake River, 11 miles West of city of Burley, Idaho, Twin Falls, Twin Falls County, ID

  9. 47. Photocopy of Photograph (original located in Univ. of Denver ...

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

    47. Photocopy of Photograph (original located in Univ. of Denver collection). C.R. Savage, Photographer, March, 1905. MILNER DAM; RIP-RAPPED UPPER SLOPE OF CENTER DAM; CROWD ALONG CHANNEL TO TUNNELS. - Milner Dam & Main Canal: Twin Falls Canal Company, On Snake River, 11 miles West of city of Burley, Idaho, Twin Falls, Twin Falls County, ID

  10. 53. Photocopy of Photograph (original located in Univ. of Denver ...

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

    53. Photocopy of Photograph (original located in Univ. of Denver collection). C.R. Savage, Photographer, March, 1905. MILNER DAM TUNNEL CHANNEL AND APPROACH TO TUNNEL GATES. - Milner Dam & Main Canal: Twin Falls Canal Company, On Snake River, 11 miles West of city of Burley, Idaho, Twin Falls, Twin Falls County, ID

  11. 50. Photocopy of Photograph (original located in Univ. of Denver ...

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

    50. Photocopy of Photograph (original located in Univ. of Denver collection). C.R. Savage, Photographer, March, 1905. MILNER DAM TUNNELS. CHANNEL APPROACHING TUNNELS; SNAKE RIVER PASSING THROUGH. - Milner Dam & Main Canal: Twin Falls Canal Company, On Snake River, 11 miles West of city of Burley, Idaho, Twin Falls, Twin Falls County, ID

  12. Scott M. Ransom National Radio Astronomy Observatory / Univ. of Virginia

    E-print Network

    Groppi, Christopher

    Scott M. Ransom Astronomer National Radio Astronomy Observatory / Univ. of Virginia Scott is a tenured astronomer with the National Radio Astronomy Observatory (NRAO) in Charlottesville, VA where he studies all things "pulsar". He is also a Research Professor with the Astronomy Department

  13. 73. Photocopy of Photograph (original located in Univ. of Denver ...

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

    73. Photocopy of Photograph (original located in Univ. of Denver collection). C.R. Savage, Photographer, March, 1905. SILT FILTERING 'THROUGH NORTH DAM; NORTH DAM FROM DOWNSTREAM SHOWING DIRT FILL FILTERING THROUGH DAM. - Milner Dam & Main Canal: Twin Falls Canal Company, On Snake River, 11 miles West of city of Burley, Idaho, Twin Falls, Twin Falls County, ID

  14. 64. Photocopy of Photograph (original located in Univ. of Denver ...

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

    64. Photocopy of Photograph (original located in Univ. of Denver collection). C.R. Savage, Photographer, March, 1905. MILNER DAM. WATER FLOODING OVER SPILLWAY FOR FIRST TIME. - Milner Dam & Main Canal: Twin Falls Canal Company, On Snake River, 11 miles West of city of Burley, Idaho, Twin Falls, Twin Falls County, ID

  15. 70. Photocopy of Photograph (original located in Univ. of Denver ...

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

    70. Photocopy of Photograph (original located in Univ. of Denver collection). C.R. Savage, Photographer, March, 1905. SNAKE RIVER SHALLOWS AFTER TUNNEL CLOSURE; DOWNSTREAM FROM MILNER DAM. - Milner Dam & Main Canal: Twin Falls Canal Company, On Snake River, 11 miles West of city of Burley, Idaho, Twin Falls, Twin Falls County, ID

  16. 59. Photocopy of Photograph (original located in Univ. of Denver ...

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

    59. Photocopy of Photograph (original located in Univ. of Denver collection) C.R. Savage, Photographer, date unknown. MILNER DAM; TUNNEL OUTLETS WITH SNAKE RIVER PASSING THROUGH. - Milner Dam & Main Canal: Twin Falls Canal Company, On Snake River, 11 miles West of city of Burley, Idaho, Twin Falls, Twin Falls County, ID

  17. 45. Photocopy of Photograph (original located in Univ. of Denver ...

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

    45. Photocopy of Photograph (original located in Univ. of Denver collection). C.R. Savage, Photographer, March 1905. SNAKE RIVER BEHIND MILNER DAM; MILNER RESERVOIR RISING. - Milner Dam & Main Canal: Twin Falls Canal Company, On Snake River, 11 miles West of city of Burley, Idaho, Twin Falls, Twin Falls County, ID

  18. 74. Photocopy of Photograph (original located in Univ. of Denver ...

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

    74. Photocopy of Photograph (original located in Univ. of Denver collection). C.R. Savage, Photographer, March, 1905. MILNER DAM; LOOKING UP THE EMPTY RIVER BED TOWARD THE MIDDLE DAM. - Milner Dam & Main Canal: Twin Falls Canal Company, On Snake River, 11 miles West of city of Burley, Idaho, Twin Falls, Twin Falls County, ID

  19. 69. Photocopy of Photograph (original located in Univ. of Denver ...

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

    69. Photocopy of Photograph (original located in Univ. of Denver collection). C.R. Savage, Photographer, March, 1905. POWER FLUME AND EMPTY RIVER. THE POWER FLUME AFTER GATE CLOSURE. - Milner Dam & Main Canal: Twin Falls Canal Company, On Snake River, 11 miles West of city of Burley, Idaho, Twin Falls, Twin Falls County, ID

  20. J. Math. Sci. Univ. Tokyo 17 (2010), 159178.

    E-print Network

    Kawahigashi, Yasuyuki

    2010-01-01

    of valuation ring type, then one of the iterated Riccati equations has an algebraic solution. ApplyingJ. Math. Sci. Univ. Tokyo 17 (2010), 159­178. Solvability of Difference Riccati Equations field extensions of valuation ring type and prove the following. If a difference Riccati equation which

  1. Motivac~ao O -Calculus

    E-print Network

    Ayala-Rincón, Mauricio

    Motiva¸c~ao O -Calculus O -Calculus com Tipos Simples Redu¸c~ao do Sujeito para C´alculos de Simples #12;Motiva¸c~ao O -Calculus O -Calculus com Tipos Simples Redu¸c~ao do Sujeito para C´alculos de -Calculus -Calculus com Nomes -Calculus em Nota¸c~ao de Bruijn C´alculos de Substitui¸c~oes Expl´icitas O

  2. Ao Comunitria I APRESENTAO

    E-print Network

    Díaz, Lorenzo J.

    apoio ao ser humano, em seu contexto sociofamiliar, por meio da prática do trabalho social voluntário meio com que todo cidadão, independente de escolaridade, religião, cor condição financeira ou física, pode fazer a diferença no meio em que vive. Assim sendo, caracteriza-se como uma importante força que

  3. Puzzles for Particle Physics Department, Univ. of Wisconsin-Madison

    E-print Network

    Saffman, Mark

    Puzzles for Particle Physics Yang Bai Physics Department, Univ. of Wisconsin-Madison Physics 301.5 GeV 3(MZ) 0.1184 0.0007 ! We are in a Meta-StableVacuum #12;11 Puzzles 5. Cosmological constant matter me mt = 10 6 vEW MPl = 10 16 nB n ¯B nB + n ¯B = 10 10 DM Baryon = 5 M4 Pl = 10 120 #12;12 Puzzle

  4. The Subaru Coronagraphic Extreme-AO (SCExAO) system

    E-print Network

    Guyon, Olivier

    of the immediate environment of nearby stars. Characterization of planets (including Earths/SuperEarths) and dust188) AO188 frame SCExAO / HiCIAO frame (can accept other instruments) SCExAO bench HiCIAO support pads

  5. www.cam.ac.uk/museums @CamUnivMuseumsBlog: camunivmuseums.wordpress.com Connecting Collections

    E-print Network

    www.cam.ac.uk/museums @CamUnivMuseumsBlog: camunivmuseums.wordpress.com Connecting Collections.cam.ac.uk/museums @CamUnivMuseumsBlog: camunivmuseums.wordpress.com Building Knowledge Over 410 volunteers supported

  6. 1NASA Glenn Research Center M.Atiquzzaman, Univ. of Oklahoma, July 2002.

    E-print Network

    Atiquzzaman, Mohammed

    1NASA Glenn Research Center M.Atiquzzaman, Univ. of Oklahoma, July 2002. Effect of Congestion University of Oklahoma. Email: atiq@ieee.org Web: www.cs.ou.edu/~atiq NASA Glenn Research Center, Cleveland, Ohio. July 16, 2002. #12;2NASA Glenn Research Center M.Atiquzzaman, Univ. of Oklahoma, July 2002

  7. Introduction to Computational Fluid Dynamics 424512 E #5-rz maj 2015 bo Akademi Univ -Chemical Engineering

    E-print Network

    Zevenhoven, Ron

    ://users.abo.fi/rzevenho/kursRZ.html#FPS Introduction to Computational Fluid Dynamics 424512 E #5- rz maj 2015 Åbo Akademi Univ - Chemical Engineering - Chemical Engineering Thermal and Flow Engineering - Biskopsgatan 8, 20500 Turku 3/70 Fluid flow around 2015 Åbo Akademi Univ - Chemical Engineering Thermal and Flow Engineering - Biskopsgatan 8, 20500 Turku

  8. Netzwerke und Sicherheit auf mobilen Gerten Univ.-Prof. Priv.-Doz. DI Dr. Ren Mayrhofer

    E-print Network

    Jüttler, Bert

    Biometric authentication: 3D Face R. D. Findling and R. Mayrhofer, "Towards pan shot face unlock: Using Geräten ­ Univ.-Prof. René Mayrhofer Biometric authentication: Iris #12;15Netzwerke und Sicherheit auf mobilen Geräten ­ Univ.-Prof. René Mayrhofer Biometric authentication: Gait M. Muaaz and R. Mayrhofer

  9. Mechanisms of Nickel on A. M. SCHEIDEGGER*, D. L. SPARKS, Univ. of Delaware, M. FENDORF,

    E-print Network

    Sparks, Donald L.

    Mechanisms of Nickel on A. M. SCHEIDEGGER*, D. L. SPARKS, Univ. of Delaware, M. FENDORF, Univ. of Berkeley, and G. M. LAMBLE, Brookhaven National Laboratory. Nickel adsorption on the edge swfaces be divided into two pH regions. In the lower pH region (pH nickel adsorption increased

  10. http://www.univ-avignon.fr/fr/international.html UUNNIIVVEERRSSIITTEE DD''AAVVIIGGNNOONN EETT DDEESS PPAAYYSS DDEE VVAAUUCCLLUUSSEE

    E-print Network

    Naud Frédéric

    http://www.univ-avignon.fr/fr/international.html « ' UUNNIIVVEERRSSIITTEE DD''AAVVIIGGNNOONN EETT échange entrants ­ UAPV 2014/2015 - 2 ­ http://www.univ-avignon.fr/fr/international.html Etudiants en France, ce qui facilitera votre séjour d'études à l'Université d'Avignon. http://www.univ-avignon.fr/fr/international.html

  11. The Subaru Coronagraphic Extreme-AO (SCExAO) system

    E-print Network

    Guyon, Olivier

    parts of young planetary systems (habitable zone of stars) 1 AU radius orbit (= center of habitable zone) 1 AU radius orbit (= center of habitable zone) Log ­ wavefront control ­ calibration SCExAO schedule and early results SCExAO as a precursor to imaging habitable

  12. Subscriber access provided by TEL AVIV UNIV (AO) Nano Letters is published by the American Chemical Society. 1155 Sixteenth

    E-print Network

    Rabani, Eran

    Society. 1155 Sixteenth Street N.W., Washington, DC 20036 Letter Distribution of Multiexciton Generation-4492 · Publication Date (Web): 29 October 2008 Downloaded from http://pubs.acs.org on December 20, 2008 More About inefficient for NCs exceeding 3 nm in diameter in the photon energy range of 2-3 times the band gap

  13. Ao.Univ.-Prof. Dr. Karl Steininger Mag. Gabriel Bachner Institute of Economics Wegener Center for Climate and Global Change

    E-print Network

    Steininger, Karl W.

    for Climate and Global Change RESOWI, F, 4th floor Brandhofgasse 5 Office hour: Mo 12:30-14:00 Office hour: We Mo, 27.04. Milestone 4: Description of modeling and first policy simulation results Present ideas) to one of the following topics: Transition to a low carbon economy Climate change impacts

  14. Medidas Conte Defini c ao,

    E-print Network

    Barata, João Carlos Alves

    exemplo do conjunto de Vitali, tratado na prâ?? oxima seâ?º câ? ao, existem, jâ?? a no simples caso da reta real. Todos esses conceitos serâ? ao tratados de modo cuidadoso adiante, mas achamos por bem comeâ?º car

  15. The Artificial Intelligence (AI) program at the Univer-sity of Michigan comprises a multidisciplinary group

    E-print Network

    Eustice, Ryan

    of multiple agents, machine learning, reinforcement learning, cognitive modeling, game theory, natural language process- ing, machine perception, healthcare computing, and robotics. Research in the ArtificialThe Artificial Intelligence (AI) program at the Univer- sity of Michigan comprises

  16. UNIvERsITY OF ` SA5I

    E-print Network

    Saskatchewan, University of

    UNIvERsITY OF ` SA5I Beldan, Committee Coordinator, Academic Programs Committee of University Council From: Dr. Trever Crowe for Graduate Certificate in the Social Economy and Co-operatives Consistent with the Curricular Changes

  17. 1. Simpson, G. G. TempoandModeinEvolution (Columbia Univ. Press, 1944).

    E-print Network

    Zhang, Bing

    astronomical object ever observed in cosmic history. This ancient beacon offers a glimpse of the little.Nat. 138, 1315­1341 (1991). 6. Kimura, M. TheNeutralTheoryofMolecularEvolution (Cambridge Univ. Press, 1983

  18. MEMS AO for Planet Finding

    NASA Technical Reports Server (NTRS)

    Rao, Shanti; Wallace, J. Kent; Shao, Mike; Schmidtlin, Edouard; Levine, B. Martin; Samuele, Rocco; Lane, Benjamin; Chakrabarti, Supriya; Cook, Timothy; Hicks, Brian; Jung, Paul

    2008-01-01

    This slide presentation reviews a method for planet finding using microelectromechanical systems (MEMS) Adaptive Optics (AO). The use of a deformable mirror (DM) is described as a part of the instrument that was designed with a nulling interferometer. The strategy that is used is described in detail.

  19. 28 jan 15bo Akademi Univ -Thermal and Flow Engineering Piispankatu 8, 20500 Turku 1/82 Thermodynamics of separation

    E-print Network

    Zevenhoven, Ron

    Clearly, some entropy must be produced to 1) compensate for S 28 jan 15Åbo Akademi Univ - Thermal and Flow Engineering Piispankatu 8, 20500 Turku 1 8, 20500 Turku 2/82 3.1 Separation and entropy #12;28 jan 15Åbo Akademi Univ - Thermal and Flow

  20. www.cam.ac.uk/museums @CamUnivMuseumsBlog: camunivmuseums.wordpress.com Connecting Collections

    E-print Network

    www.cam.ac.uk/museums @CamUnivMuseumsBlog: camunivmuseums.wordpress.com Connecting Collections (C) Martin Gardner #12;www.cam.ac.uk/museums @CamUnivMuseumsBlog: camunivmuseums.wordpress and study days Museum of Zoology secured £1.8m in Heritage Lottery Funding for major redevelopment Sedgwick

  1. Echtzeitfhigkeit fr Mesh-Netzwerke in der Automatisierung Andre Herms, Otto-von-Guericke Univ. Magdeburg, Institut fr Verteilte Systeme

    E-print Network

    Echtzeitfähigkeit für Mesh-Netzwerke in der Automatisierung Andre Herms, Otto-von-Guericke Univ. Magdeburg, Institut für Verteilte Systeme Georg Lukas, Otto-von-Guericke Univ. Magdeburg, Institut für Handhabbarkeit und höhere Ausfallsicherheit bringen Mesh-Netzwerke, die bereits von einigen Herstellern angeboten

  2. LANDSLIDE INITIATION AFTER DROUGHT NICHOLS, Kyle K., Geology and School of Natural Resources, Univ of Vermont, Burlington, VT

    E-print Network

    Nichols, Kyle K.

    LANDSLIDE INITIATION AFTER DROUGHT NICHOLS, Kyle K., Geology and School of Natural Resources, Univ., Geology, Univ Vermont, Burlington, VT 05405, One of the largest landslides to affect Vermont in decades (>27,000 m3 ), occurred in the spring of 1999 after 6 months of below normal precipitation. Landslides

  3. Reprinted from: Proceedings Colour Image Science 2000, Univ. of Derby, Derby England, April 2000

    E-print Network

    Funt, Brian

    ] use colour-edge histograms to do multi-coloured object recognition. This paper describes the results276 Reprinted from: Proceedings Colour Image Science 2000, Univ. of Derby, Derby England, April 2000 Spotting Colours Georgina Kwei, Kobus Barnard, and Brian Funt Department of Computing Science

  4. Courant Institute of Mathematical Sciences New York UNiverSitY

    E-print Network

    Van Den Eijnden, Eric

    Courant Institute of Mathematical Sciences New York UNiverSitY 75 Years of Achievement #12;Front of Mathematical Sciences. As we celebrate our 75th Anniversary in 2010­2011, it is natural to examine our mission and education in mathematics and computer science. We contribute to US and international science and engineering

  5. 37. Photocopy of Photograph(original located in Univ. of Denver collection). ...

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

    37. Photocopy of Photograph(original located in Univ. of Denver collection). C.R. Savage, Photographer, March, 1905. NORTH AND MIDDLE DAMS, MILNER DAM, MAIN CHANNEL DAM, FOREGROUND; MIDDLE DAM AND TUNNEL REGULATORS, BACKGROUND. - Milner Dam & Main Canal: Twin Falls Canal Company, On Snake River, 11 miles West of city of Burley, Idaho, Twin Falls, Twin Falls County, ID

  6. A Needs Assessment for the Introduction of a Food Science Program at the Univ. of Guyana

    ERIC Educational Resources Information Center

    Morrison, Donna

    2012-01-01

    This research describes the outcome of a needs assessment to determine whether the Univ. of Guyana should introduce a Food Science program. The research design utilized interviews and questionnaires to large manufacturing organizations and agroprocessors to determine if the required skills are available for the manufacturing process. Results…

  7. Technology Available for Licensing Office of Technology Management-The Pennsylvania State Univ.

    E-print Network

    Maroncelli, Mark

    Technology Available for Licensing Office of Technology Management-The Pennsylvania State Univ. 113 Technology Center, University Park, PA 16802 814.865.6277 phone; 814.865.3591 fax Contact: WilliamHGowen Sr.Technology-desulfurization technology is complicated and expensive to use and a variety of other desulfurization processes have been

  8. Machine Learning -TP Nathalie Villa-Vialaneix -nathalie.villa@univ-paris1.fr

    E-print Network

    Villa-vialaneix, Nathalie

    Machine Learning - TP Nathalie Villa-Vialaneix - nathalie.villa@univ-paris1.fr http) Machine Learning Nathalie Villa-Vialaneix 1 / 42 #12;Packages in R is provided with basic functions (Niveau 3) Machine Learning Nathalie Villa-Vialaneix 2 / 42 #12;Working directory All les in proper

  9. Coral Reefs UniveRsity of MiaMi Rosenstiel sChool

    E-print Network

    Miami, University of

    Coral Reefs UniveRsity of MiaMi Rosenstiel sChool of MaRine and atMospheRiC sCienCe 4600 Underwater Communities While coral reefs may seem like merely beautiful oceanic landscape, they are actually have played into coral reef destruction. Facing threats from El Niño, heat stress, disease

  10. Test Access Mechanism for Core Based SystemonChip The Univ. of Texas at Dallas

    E-print Network

    Nourani, Mehrdad

    1 Test Access Mechanism for Core Based System­on­Chip M. Nourani The Univ. of Texas at Dallas Dept of TAM for SoC's. The basic goal is to develop a global design for test methodology and tool for testing as their interactions to one another. More specifically, it al­ lows at­speed testing and multi­core interaction during

  11. Towards wide-coverage semantics for Italian legal texts Univ. di Roma "La Sapienza"

    E-print Network

    Mazzei, Alessandro

    Towards wide-coverage semantics for Italian legal texts Johan Bos Univ. di Roma "La Sapienza" bos language independent. We aim to use Boxer for the semantic interpretation of Italian legal sentences. As starting point we take TUT, the Turin University Treebank [9, 7], an Italian morphologically

  12. Applied Mechanics Krister Wolff, PhD, Chalmers Univ. of Tech.Autonomous Agents 2008

    E-print Network

    Wolff, Krister

    Univ. of Tech.Autonomous Agents 2008 Machine intelligence · Scientific field founded in the 1950s · The goal of Machine intelligence: "Generate machines capable of displaying human-level intelligence is the human. [Computing machinery and intelligence] copyrighted image #12;Applied Mechanics © Krister Wolff

  13. Sr. Engineer, Water Resources Univ of FL-SW FL Research & Education Center Immokalee, FL

    E-print Network

    Hill, Jeffrey E.

    Sr. Engineer, Water Resources Univ of FL-SW FL Research & Education Center ­ Immokalee, FL Technical position for research, extension, and teaching of water resources (quantity and quality and implementing construction plans for water resources projects, carrying out field and laboratory experiments

  14. MORE IMPACT-MELT CLASTS IN FELDSPATHIC LUNAR METEORITES. B. A. Cohen, Inst. of Meteoritics, Univ.

    E-print Network

    Cohen, Barbara Anne

    MORE IMPACT-MELT CLASTS IN FELDSPATHIC LUNAR METEORITES. B. A. Cohen, Inst. of Meteoritics, Univ meteorite breccias yield ages of impacts occurring in the vicinity of the breccia until its lithification [1 reports on 13 clasts in five new meteorites, identified using the petrographic mi- croscope

  15. Employment after Graduation: 1991 1997: Lecturer, Department of Physics, Chulalongkorn Univ., Bangkok, Thailand

    E-print Network

    Boolchand, Punit

    by solar storms, with a potential for advance warning of space weather effects. David Ruffolo Married, 3, Thailand 2003 ­ 2004: Associate Professor, Department of Physics, Mahidol Univ., Bangkok, Thailand Current of GeV- range ions from solar storms; space plasma physics, especially regarding the random walk

  16. PECOPupilmappingExoplanetCoronagraphObserver Univ. of Arizona Ames Research Center

    E-print Network

    Guyon, Olivier

    in habitable zone #12;PECOPupilmappingExoplanetCoronagraphObserver Univ. of Arizona Ames Research Center PECO simulation of Earth- radius planet with Earth albedo in habitable zone of candidate star · Assumes detection a "Grand Tour" of 10 nearby stars searching for small (Earth & Super-Earth) planets in their habitable

  17. PLEASE SCROLL DOWN FOR ARTICLE This article was downloaded by: [Univ of Cambridge

    E-print Network

    Cambridge, University of

    PLEASE SCROLL DOWN FOR ARTICLE This article was downloaded by: [Univ of Cambridge] On: 19 May 2010 History Museum, London, UK b Palaeobiology Programme, Department of Earth Sciences, Uppsala University, Uppsala, Sweden c Department of Earth Sciences, University of Cambridge, Cambridge, UK First published on

  18. www.cam.ac.uk/univ/history A history of discoveries

    E-print Network

    www.cam.ac.uk/univ/history A history of discoveries Over the centuries, Cambridge discoveries Flight Lieutenant Frank Whittle is sent to Cambridge as a mature student by the RAF and is encouraged tomorrow ­ A brief history of the University In the 13th, 14th and 15th centuries... Within a century

  19. www.cam.ac.uk/univ/works With more than 18,000

    E-print Network

    www.cam.ac.uk/univ/works With more than 18,000 students from all walks of life and all corners-Chancellor The Chancellor is elected for life as the constitutional head of the University although the role is now largely and administrative officer. Pro-Vice-Chancellors Five Pro-Vice-Chancellors are appointed to support the Vice

  20. Func~ao Inversa e Func~ao Implicita (Resoluc~ao Sumaria) 19 de Maio de 2009

    E-print Network

    Ventura, Joana

    exemplo de uma fun¸c~ao f : R R bijectiva e de classe C1 cuja inversa n~ao seja de classe C1. ResoluFun¸c~ao Inversa e Fun¸c~ao Impl´icita (Resolu¸c~ao Sum´aria) 19 de Maio de 2009 1. Seja F(x, y) = f(x, xy) (com f : R2 R de classe C2). Exprima a derivada parcial mista F12 `a custa de derivadas

  1. Authorized licensed use limited to: Univ of Calif Berkeley. Downloaded on October 31, 2008 at 19:03 from IEEE Xplore. Restrictions apply. Authorized licensed use limited to: Univ of Calif Berkeley. Downloaded on October 31, 2008 at 19:03 from IEEE Xplore.

    E-print Network

    El Ghaoui, Laurent

    Authorized licensed use limited to: Univ of Calif Berkeley. Downloaded on October 31, 2008 at 19:03 from IEEE Xplore. Restrictions apply. #12;Authorized licensed use limited to: Univ of Calif Berkeley limited to: Univ of Calif Berkeley. Downloaded on October 31, 2008 at 19:03 from IEEE Xplore. Restrictions

  2. Astronomia de Posic~ao Notas de Aula Vers~ao 03/06/2013

    E-print Network

    Neto, Gastão Bierrenbach Lima

    Astronomia de Posi¸c~ao Notas de Aula ­ Vers~ao 03/06/2013 Gast~ao Bierrenbach Lima Neto Instituto de Astronomia, Geof´isica e Ci^encias Atmosf´ericas (IAG) Universidade de S~ao Paulo (USP) A ´ultima

  3. Aerosol Observing System (AOS) Handbook

    SciTech Connect

    Jefferson, A

    2011-01-17

    The Aerosol Observing System (AOS) is a suite of in situ surface measurements of aerosol optical and cloud-forming properties. The instruments measure aerosol properties that influence the earth’s radiative balance. The primary optical measurements are those of the aerosol scattering and absorption coefficients as a function of particle size and radiation wavelength and cloud condensation nuclei (CCN) measurements as a function of percent supersaturation. Additional measurements include those of the particle number concentration and scattering hygroscopic growth. Aerosol optical measurements are useful for calculating parameters used in radiative forcing calculations such as the aerosol single-scattering albedo, asymmetry parameter, mass scattering efficiency, and hygroscopic growth. CCN measurements are important in cloud microphysical models to predict droplet formation.

  4. Discrete morse gradient fields with stable matching Jo~ao Paix~ao and Thomas Lewiner

    E-print Network

    Díaz, Lorenzo J.

    Discrete morse gradient fields with stable matching Jo~ao Paix~ao and Thomas Lewiner MAT. 14/13 #12;Cadastro de Pr´e­publicac¸~ao : MAT. 14/13 T´itulo : Discrete morse gradient fields with stable matching Autores : Jo~ao Paix~ao and Thomas Lewiner Palavras Chave : 1. Discrete Morse Theory 2. Stable Matching 3

  5. MAC-212 --Laboratorio de Computac~ao Exercicio Programa 2: Simulac~ao a Eventos Discretos

    E-print Network

    Reverbel, Francisco

    cada tarefa, s~ao dados: · o tempo de chegada da tarefa · a dura¸c~ao da tarefa. O sistema simulado. A dura¸c~ao de uma tarefa ´e o tempo que o sistema efetivamente leva para executar essa tarefa. Ela n~ao inclui o tempo que a tarefa fica aguardando sua execu¸c~ao. Seu programa simular´a o comportamento do

  6. SyracuSe univerSity Food ServiceS 20142015

    E-print Network

    McConnell, Terry

    R 2014-2015 #12; SyracuSe univerSity Food ServiceS 2014­2015 contentS Welcome-mail: mealtalk@syr.edu Web.site:foodservices.syr.edu Facebook: Su Food Services WeAreListening Our".us.on.Facebook.and.share.your. comments.at.Su Food Services . .Take.our.mobile.survey ..The.address. is:.http://portal.touchwork . com

  7. SyracuSe univerSity The Maxwell PrograM in

    E-print Network

    McConnell, Terry

    . Pictured left is James Steinberg, dean of the Maxwell School and former U.S. deputy secretary of state. CCESyracuSe univerSity The Maxwell PrograM in CiTizenshiP and CiviC engageMenT (CCe) a major change. How iT works CCE, offered by the Maxwell School of Citizenship and Public Affairs, is a double

  8. 3.12.2014bo Akademi Univ -Thermal and Flow Engineering Piispankatu 8, 20500 Turku 1/56 9. Solar cooling

    E-print Network

    Zevenhoven, Ron

    .iea.org/publications/freepublications/publication/Solar_Heating_Cooling_Road map_2012_WEB.pdf 3.12.2014 Åbo Akademi Univ - Thermal and Flow Engineering - Piispankatu 8, 20500.iea.org/publications/freepublications/publication/Solar_Heating_Cooling_Road map_2012_WEB.pdf #12;3.12.2014Åbo Akademi Univ - Thermal and Flow Engineering - Piispankatu 8, 20500.12.2014Åbo Akademi Univ - Thermal and Flow Engineering - Piispankatu 8, 20500 Turku 8/56 http://www.brighton-webs

  9. Determinac~ao da parametrizac~ao e curvatura de uma superficie em R3

    E-print Network

    Natário, José

    , Karl Schwarzschild descobriu a solu¸c~ao das equa¸c~oes de Einstein correspondente ao campo de gravita´icie. Determina¸c~ao da m´etrica Se restringirmos o espa¸co-tempo de Schwarzschild a tr^es dimens~oes (t, r~ao, que (3) ´e a m´etrica medida pelos observadores esta- cion´arios no espa¸co-tempo de Schwarzschild

  10. Thicket: Construc~ao e Manutenc~ao de Multiplas Arvores numa Rede entre Pares

    E-print Network

    Rodrigues, Luís E.T.

    Thicket: Constru¸c~ao e Manuten¸c~ao de M´ultiplas ´Arvores numa Rede entre Pares M´ario Ferreira, Jo~ao Leit~ao, and Lu´is Rodrigues INESC-ID / IST {mvvf, jleitao}@gsd.inesc-id.pt, ler 2010 - II Simp´osio de Inform´atica, Lu´is S. Barbosa, Miguel P. Correia (eds), 9-10 Setembro, 2010, pp

  11. Suporte `a computac~ao orientada aos grupos em sistemas distribuidos tolerantes a faltas

    E-print Network

    Rodrigues, Luís E.T.

    ¸ ~ao em grupo de modo eficiente sobre este tipo de infra-estrutura, prop ~oe-se uma arquitectura hier¸ ~ao destas tecnologias, a dissertac¸ ~ao sugere uma arquitectura gen´erica para su- portar interacc estar replicados. Esta arquitectura permite suportar de um modo integrado diversos protocolos de gest

  12. Precificac~ao via arbitragem Modelo Binomial

    E-print Network

    Zubelli, Jorge Passamani

    , . . . , sN e M poss´iveis estados. Um investidor toma uma posi¸c~ao inicial e, ap´os um per´iodo, um estado ´e escolhido e a posi¸c~ao do investidor ´e liquidada. O modelo fica totalmente especificado ativos ´e um vetor = (1, . . . , N)t RN , onde i > 0 significa que o investidor est´a comprado no ativo

  13. The Magellan Telescope adaptive secondary AO system

    NASA Astrophysics Data System (ADS)

    Close, Laird M.; Gasho, Victor; Kopon, Derek; Hinz, Phil M.; Hoffmann, William F.; Uomoto, Alan; Hare, Tyson

    2008-07-01

    The Magellan Clay telescope is a 6.5m Gregorian telescope located in southern Chile at Las Campanas Observatory. The Gregorian design allows for an adaptive secondary mirror that can be tested off-sky in a straight-forward manner. We have fabricated a 85 cm diameter aspheric adaptive secondary with our subcontractors and partners. This secondary has 585 actuators with <1 msec response times. The chopping adaptive secondary will allow low emissivity AO science. We will achieve very high Strehls (~98%) in the Mid-IR AO (8-26 microns) with the BLINC/MIRAC4 Mid-IR science camera. This will allow the first "super-resolution" and nulling Mid-IR studies of dusty southern objects. We will employ a high order (585 mode) pyramid wavefront sensor similar to that used in the Large Binocular Telescope AO systems. The relatively high actuator count will allow modest Strehls to be obtained in the visible (~0.8?m). Our visible light AO (Vis AO) science camera is fed by an advanced ADC and beamsplitter piggy-backed on the WFS optical table. The system science and performance requirements, and an overview the design, interface and schedule for the Magellan AO system are presented here.

  14. Standard Triaxial Ellipsoid Asteroids from AO Observations

    NASA Astrophysics Data System (ADS)

    Drummond, Jack D.; Merline, W. J.; Conrad, A.; Dumas, C.; Carry, B.

    2008-09-01

    As part of our study of resolved asteroids using adaptive optics (AO) on large telescopes (>8; m), we have identified several that can serve as Standard Triaxial Ellipsoid Asteroids (STEAs), suitable for radar and thermo-physical calibration. These objects are modeled well as triaxial ellipsoids, having: 1) small uncertainties on their three dimensions as determined with AO; 2) rotational poles well determined from both lightcurves and AO; and 3) good sidereal periods from lightcurves. Although AO allows the opportunity to find an asteroid's dimensions and rotational pole in one night, we have developed a method to combine AO observations from different oppositions to pool into a global solution. The apparent orientation and sizes of STEAs can be predicted to within a few degrees and a few km over decades. Currently, we consider 511 Davida, 52 Europa, 2 Pallas, and 15 Eunomia as STEAs. Asteroids that are not well modeled as ellipsoids, clearly showing departures from ellipsoid figures in AO images, include 129 Antigone and 41 Daphne. We will show movies of images and models of these asteroids.

  15. 19.11.2014bo Akademi Univ -Thermal and Flow Engineering Piispankatu 8, 20500 Turku 1/55 5. Low temperatures,

    E-print Network

    Zevenhoven, Ron

    ;19.11.2014 Åbo Akademi Univ - Thermal and Flow Engineering Piispankatu 8, 20500 Turku 5/55 Stirling cycle, Stirling engine Heat is temporarily stored in the regenerator, going from temperature TH to TL during step) Picture: S90 Stirling gas refrigerator (Philips) 19.11.2014Åbo Akademi Univ - Thermal and Flow Engineering

  16. By Dr. C h a r l ~ a3'. Brooks of Clark UnivErsitY

    E-print Network

    By Dr. C h a r l ~ a3'. Brooks of Clark UnivErsitY LION CrnSES ,w but was forthrrith chasEd amy by t h E March lion rdaring i n t o civilidEd rEgions fr0n t h E wilds O f t h E northwst, In I WeathEr at thE s a m tin i n t h E mU-mEsbr ahortly sprEsding OvEr t h E ~ a a t . Now PEOP~Ei n t h E

  17. Univers: The construction of an internet-wide descriptive naming system

    NASA Technical Reports Server (NTRS)

    Bowman, C. Mic

    1990-01-01

    Descriptive naming systems allow clients to identify a set of objects by description. Described here is the construction of a descriptive naming system, called Univers, based on a model in which clients provide both an object description and some meta-information. The meta-information describes beliefs about the query and the naming system. Specifically, it is an ordering on a set of perfect world approximations, and it describes the preferred methods for accommodating imperfect information. The description is then resolved in a way that respects the preferred approximations.

  18. I.K. Konstantopoulos and P.J. Antsaklis, "Eigenstructure Assignment in Reconfigurable Control Systems," Technical Report of the ISIS Group, ISIS-96-001, Dept. of Electrical Engr, Univ of Notre

    E-print Network

    Antsaklis, Panos

    Systems," Technical Report of the ISIS Group, ISIS-96-001, Dept. of Electrical Engr, Univ of Notre Dame Control Systems," Technical Report of the ISIS Group, ISIS-96-001, Dept. of Electrical Engr, Univ of Notre in Reconfigurable Control Systems," Technical Report of the ISIS Group, ISIS-96-001, Dept. of Electrical Engr, Univ

  19. I.K. Konstantopoulos and P.J. Antsaklis, "An Optimization Strategy for Reconfigurable Control Systems," Technical Report of the ISIS Group, ISIS-95-006, Dept. of Electrical Engr, Univ of Notre Dame,

    E-print Network

    Antsaklis, Panos

    Systems," Technical Report of the ISIS Group, ISIS-95-006, Dept. of Electrical Engr, Univ of Notre Dame Control Systems," Technical Report of the ISIS Group, ISIS-95-006, Dept. of Electrical Engr, Univ of Notre for Reconfigurable Control Systems," Technical Report of the ISIS Group, ISIS-95-006, Dept. of Electrical Engr, Univ

  20. Func~ao Inversa e Func~ao Implicita 19 de Maio de 2009

    E-print Network

    Ventura, Joana

    uma fun¸c~ao f : R R bijectiva e de classe C1 cuja inversa n~ao seja de classe C1. 6. Seja f : R2 R2Fun¸c~ao Inversa e Fun¸c~ao Impl´icita 19 de Maio de 2009 1. Seja F(x, y) = f(x, xy) (com f : R2 R de classe C2). Exprima a derivada parcial mista F12 `a custa de derivadas parciais de f. 2. Seja F

  1. Historia da Computac~ao MAC 412 -Organizac~ao de Computadores

    E-print Network

    Song, Siang Wun

    . Babbage (1792-1871) Difference Engine (ver foto): executaria apenas um algoritmo (c´alculo de tabela para navega¸c~ao mar´itima) Analytical Engine (ver foto): M´aquina de uso geral, mas n~ao ficou operacional) Constru´ido pelo governo brit^anico para decifrar mensagens codificadas por ENIGMA (ver foto). · ENIAC

  2. Subscriber access provided by UNIV OF TEXAS ARLINGTON Environmental Science & Technology is published by the American Chemical Society.

    E-print Network

    Hu, Qinhong "Max"

    Subscriber access provided by UNIV OF TEXAS ARLINGTON Environmental Science & Technology in the course of their duties. Article An evaluation of water quality in private drinking water wells near of water quality in private drinking2 water wells near natural gas extraction sites in3 the Barnett Shale

  3. Subscriber access provided by RICE UNIV The Journal of Physical Chemistry is published by the American Chemical Society.

    E-print Network

    Brooks, Philip R.

    by the American Chemical Society. 1155 Sixteenth Street N.W., Washington, DC 20036 Article Role of Fine Structure this article #12;Role of Fine Structure States in a Chemical Reaction: Na* + KBr f NaBr + K* Lawrence L. LewisSubscriber access provided by RICE UNIV The Journal of Physical Chemistry is published

  4. Subscriber access provided by UNIV OF UTAH The Journal of Physical Chemistry B is published by the American Chemical

    E-print Network

    Simons, Jack

    to reproduce figures and/or text from this article #12;Role of Charge Transfer in the Structure and DynamicsSubscriber access provided by UNIV OF UTAH The Journal of Physical Chemistry B is published by the American Chemical Society. 1155 Sixteenth Street N.W., Washington, DC 20036 Article Role of Charge Transfer

  5. Universit Blaise Pascal Service Universitaire des Etudiants Etrangers www.univ-bpclermont.fr Examens du DELF / DALF

    E-print Network

    Sart, Remi

    Université Blaise Pascal ­ Service Universitaire des Etudiants Etrangers ­ www Blaise Pascal ­ Service Universitaire des Etudiants Etrangers ­ www.univ-bpclermont.fr > DELF A2'obtention du diplôme : 50/100 · Note minimale requise par épreuve : 5/25 #12;Université Blaise Pascal ­ Service

  6. Dpartement R & T Giulio.Manzonetto@lipn.univ-paris13.fr Module M1105 -Introduction aux systmes informatiques

    E-print Network

    Giulio, Manzonetto

    .Manzonetto@lipn.univ-paris13.fr -- cp /etc/passwd . -- cp /etc/hosts ./tp_intro_sys/.. -- ls ../../../../../../etc -- ls /home ../.. -- ls . Réseaux -- Partie 1 7 IUT R&T Villetaneuse #12;Département R & T Giulio

  7. Stages de M2 modlisation en biologie 2011-2012 Contact :ovidiu.radulescu@univ-montp2.fr

    E-print Network

    Radulescu, Ovidiu

    Stages de M2 modélisation en biologie 2011-2012 Contact :ovidiu.radulescu@univ-montp2.fr Titre : Modèles stochastiques de l'expression génétique Equipe : Biophysique théorique et biologie des systèmes nécessaire en biologie moléculaire lorsque les abondances de certaines espèces sont faibles. Les algorithmes

  8. The Regular Viewpoint on PA-Processes Lab. d'Informatique de Marseille, Univ. Aix-Marseille & CNRS URA 1787,

    E-print Network

    Doyen, Laurent

    The Regular Viewpoint on PA-Processes D. Lugiez Lab. d'Informatique de Marseille, Univ. Aix Abstract PA is the process algebra allowing non-determinism, sequential and parallel com- positions, and recursion. We suggest viewing PA-processes as trees, and using tree- automata techniques for veri#12;cation

  9. The Regular Viewpoint on PA-Processes Lab. d'Informatique de Marseille, Univ. Aix-Marseille & CNRS URA 1787,

    E-print Network

    Doyen, Laurent

    The Regular Viewpoint on PA-Processes D. Lugiez Lab. d'Informatique de Marseille, Univ. Aix Abstract PA is the process algebra allowing non-determinism, sequential and parallel com- positions, and recursion. We suggest viewing PA-processes as trees, and using tree- automata techniques for verification

  10. A Case for Ending Monolithic Apps for Connected Devices Rayman Preet Singh (Univ. of Waterloo) Chenguang Shen (UCLA)

    E-print Network

    Hunt, Galen

    A Case for Ending Monolithic Apps for Connected Devices Rayman Preet Singh (Univ. of Waterloo. Most applications that use connected devices today are built in a monolithic way. That is, applications break free from this monolithic and restrictive setting? Can we enable applications to be programmed

  11. Balanced configurations of 2n + 1 plane vectors RessayreNicolas (ressayre@math.univ-montp2.fr)

    E-print Network

    Ressayre, Nicolas

    Balanced configurations of 2n + 1 plane vectors RessayreNicolas (ressayre@math.univ-montp2.fr is a positive integer) of vectors of R2 is said to be uniform and balanced if for any index i {1, · · · , m transitively on the set of uniform and balanced configurations of m vectors. Keywords: Balanced configuration

  12. Subscriber access provided by STANFORD UNIV GREEN LIBR Analytical Chemistry is published by the American Chemical Society. 1155 Sixteenth

    E-print Network

    Barron, Annelise E.

    Subscriber access provided by STANFORD UNIV GREEN LIBR Analytical Chemistry is published inchworm movement, to which we attribute the increased DNA resolution. Substantial improvements in DNA peak. This shift is continuing with a movement toward microfluidic chips,2,3 and for these miniatur- ized platforms

  13. Subscriber access provided by UNIV ILLINOIS URBANA Journal of Medicinal Chemistry is published by the American Chemical Society.

    E-print Network

    Hergenrother, Paul J.

    traditional Chinese herbal remedies. Natural 1,2,4-trioxane artemisinin (1) and its semi- synthetic daughterSubscriber access provided by UNIV ILLINOIS URBANA Journal of Medicinal Chemistry is published, Maryland 21218-2685, DiVision of Pharmacology, Department of Medicine, School of Medicine, The Johns

  14. Subscriber access provided by BRANDEIS UNIV The Journal of Physical Chemistry A is published by the American Chemical

    E-print Network

    Epstein, Irving R.

    in disinfecting drinking water, is a strong oxidant. It can be reduced by various moleculesSubscriber access provided by BRANDEIS UNIV The Journal of Physical Chemistry A is published's Republic of China, and Department of Chemistry and Volen Center for Complex Systems, MS 015, Brandeis Uni

  15. J. Ocean Univ. China (Oceanic and Coastal Sea Research) Review DOI 10.1007/s11802-012-2111-7

    E-print Network

    Wang, Yu

    J. Ocean Univ. China (Oceanic and Coastal Sea Research) Review DOI 10.1007/s11802-012-2111-7 ISSN-Dimensional Ocean Sensor Networks: A Survey WANG Yu1), * , LIU Yingjian2), 1) , and GUO Zhongwen2) 1) Department) Department of Computer Science and Technology, Ocean University of China, Qingdao 266100, P. R. China

  16. Human detection using thermography for Patrol Robots Kazuki OGATA, Univ. of Tsukuba, ogata@roboken.esys.tsukuba.ac.jp

    E-print Network

    Ohya, Akihisa

    Human detection using thermography for Patrol Robots Kazuki OGATA, Univ. of Tsukuba, ogata the thermography for Patrol Robots. Because they have different temperature between human and the environment, we can detect human by the thermography. We found the way to decide the range of temperature

  17. he student population of York Univer-sity is 55,000, the same size as the city

    E-print Network

    education in Canada. York printing Steve Glassman is York Univer- sity's Director of Bookstore, Printing and Mailing Services. Chris Panagopoulos manages two of Glassman's departments, Publishing and Printing Opera them," says Glassman."Our off- set operator retired a couple of months ago. Now we simply outsource

  18. Characterization of an AO-OCT system

    SciTech Connect

    Evans, J W; Zawadzki, R J; Jones, S; Olivier, S; Werner, J S

    2007-07-26

    Adaptive optics (AO) and optical coherence tomography (OCT) are powerful imaging modalities that, when combined, can provide high-volumetric-resolution, images of the retina. The AO-OCT system at UC Davis has been under development for 2 years and has demonstrated the utility of this technology for microscopic, volumetric, in vivo retinal imaging [1]. The current system uses an AOptix bimorph deformable mirror (DM) for low-order, high-stroke correction [2] and a 140-actuator Boston Micromachines DM for high-order correction [3]. We are beginning to investigate the potential for increasing the image contrast in this system using higher-order wavefront correction. The first step in this analysis is to quantify the residual wavefront error (WFE) in the current system. Developing an error budget is a common tool for improved performance and system design in astronomical AO systems [4, 5]. The process for vision science systems is also discussed in several texts e.g. [6], but results from this type of analysis have rarely been included in journal articles on AO for vision science. Careful characterization of the AO system will lead to improved performance and inform the design of a future high-contrast system. In general, an AO system error budget must include an analysis of three categories of residual WFE: errors in measuring the phase, errors caused by limitations of the DM(s), and errors introduced by temporal variation. Understanding the mechanisms and relative size of these errors is critical to improving system performance. In this paper we discuss the techniques for characterizing these error sources in the AO-OCT system. It is useful to first calculate an error budget for the simpler case using a model eye, and then add the additional errors introduced for the case of a human subject. Measurement error includes calibration error, wavefront sensor (WFS) CCD noise, and sampling errors. Calibration errors must be measured by an external system. Typically this error is inferred from measurements of the point spread function (PSF). It can also be estimated by measuring known wavefront errors and comparing to the WFS measurement. Both methods will be used in the AO-OCT system. In this particular system measurement error introduced by the WFS can be caused by low light levels, poor camera sensitivity at the operating wavelength and noise introduced by heat in the uncooled CCD. Also, the gaussian beam profile of the system causes centroids near the edges of the pupil to be dimmer, and thus noisier. The easiest way to estimate measurement error is to compare successive wavefront measurements when the system is stable. This techniques will include vibrations and other systematic errors. Alternatively the measurement error can be estimated from measured signal to noise. This is more complicated but will decouple measurement errors from stability measurements. Ultimately, even if the phase is measured perfectly, performance will still be limited by the fitting error [7]. This error is inversely proportional to the number of actuators of the DM. Basically wavefront errors with spatial frequencies greater than half the number of actuators across the aperture cannot be corrected. For DMs with modal influence functions (like the AOptix Bimorph in the AO-OCT system), this translates to the number of modes which can be corrected. The AO-OCT system over-samples the wavefront, so to some extent, we can measure these out-of-band errors directly. In addition to fitting error, the DM will introduce errors based on the ability of each individual actuator to go to the position demanded by the control system. Generally this voltage step size is limited by the resolution of the drive electronics and can be calculated analytically.

  19. Avaliac~ao de Desempenho, Area e Energia de Caches com Controle de Poluic~ao

    E-print Network

    Hexsel, Roberto A

    sistemas embarcados. Os qua- tro projetos s~ao: i cache prim´aria com mapeamento di- reto (MD); ii cache prim´aria com associatividade bin´a- ria; iii cache prim´aria com MD associada a uma cache com controle de poluic¸~ao; e iv cache prim´aria com MD associada a uma cache de v´itimas e controle de poluic

  20. Curso de posgraduac~ao em Astrofisica Prova de admiss~ao

    E-print Network

    , 002603 u.m.a., ent~ao quanta energia de massa de repouso ´e convertida no decaimento? b) Em um referencial no qual o n´ucleo de 8 Be est´a inicialmente em repouso, qual ´e a energia cin´etica que cada n emiss~ao de energia eletromagn´etica) por seu corpo. Admita que seu corpo se comporte como um corpo

  1. Blazar AO 0235+164 brightens in optical

    NASA Astrophysics Data System (ADS)

    Larionov, V. M.; Borman, G. A.; Jorstad, S. G.

    2014-08-01

    We perform optical photometric and polarimetric monitoring of selected gamma-ray blazars using 0.7-m AZT-8 telescope (Crimean Obs.,, Russia), LX-200 0.4-m telescope (St.Petersburg Univ., Russia) (see http://vo.astro.spbu.ru/program ) and 1.8-m Perkins telescope (Lowell Obs., AZ, USA) (http://www.bu.edu/blazars/VLBAproject.html ), partly in the frames of WEBT/GASP project.

  2. Universit de Franche-Comt Bureau doctoral -03 81 66 58 67 / 06 69 13 66 22 / formations.doctorales@univ-fcomte.fr

    E-print Network

    Jeanjean, Louis

    présentiel qu'en ligne. Intervenant(s) Christophe Reffay Nombre de participants Entre 8 et 20 participants Modalités d'inscription Par email à formations.doctorales@univ-fcomte.fr Votre message doit OBLIGATOIREMENT

  3. Into the Blue: AO Science in the Visible with MagAO

    NASA Astrophysics Data System (ADS)

    Close, Laird; Males, Jared; Morzinski, Katie; Kopon, Derek; Follette, Kate; Rodigas, Timothy; Hinz, Philip; Wu, Ya-Lin; Puglisi, Alfio; Esposito, Simone; Riccardi, Armando; Pinna, Enrico; Xompero, Marco; Briguglio, Runa; Uomoto, Alan; Hare, Tison

    2013-12-01

    The Magellan Clay telescope is a 6.5m Gregorian telescope located in Chile at Las Campanas Observatory. We have fabricated an 85 cm diameter aspheric adaptive secondary with our subcontractors and partners, MagAO passed acceptance tests in spring 2012, and the entire System was commissioned from Nov 17 to Dec 7, 2012. This secondary has 585 actuators with < 1 msec response times (0.7 ms typically). We fabricated a high order (585 mode) pyramid wavefront sensor (similar to that of LBT's FLAO). The relatively high actuator count allows moderate Strehls to be obtained in the visible (0.63-1.05 microns). We have built an CCD science camera called "jVisAO". On-sky long exposures (60s) achieve 30% Strehls at 0.62 microns (r') with the VisAO camera in 0.5" seeing with bright R < 8 mag stars. These relatively high optical wavelength Strehls are made possible by our powerful combination of a next generation ASM and a Pyramid WFS with 200-400 controlled modes and 1000 Hz loop frequencies. To minimize non-common path errors and enable visible AO the VisAO science camera is fed by an advanced triplet ADC and is piggy-backed on the WFS optical board itself. Despite the ability to make 25 mas images we still have ~4 mas of resolution loss to residual vibrations. We will discuss what the most difficult aspects are for visible AO on ELTs scaling from our experience with MagAO.

  4. Caracterizac~ao e Modelagem de Trafego Agregado

    E-print Network

    Abdalla, Michel Ferreira

    ¸c~ao do atraso (Jitter delay) de uma c´elula, m´axima probabilidade de perda e m´axima varia¸c~ao da probabilidade de perda de c´elulas. Como a flexibilidade do ATM na aloca¸c~ao din^amica da banda passante ´e probabilidade de perda de c´elulas e atraso m´edio das c´elulas 1 #12;em fun¸c~ao dos descritores de tr

  5. The Magellan Telescope Adaptive Secondary AO System: a visible and mid-IR AO facility

    NASA Astrophysics Data System (ADS)

    Close, Laird M.; Gasho, Victor; Kopon, Derek; Males, Jared; Follette, Katherine B.; Brutlag, Kevin; Uomoto, Alan; Hare, Tyson

    2010-07-01

    The Magellan Clay telescope is a 6.5m Gregorian telescope located in Chile at Las Campanas Observatory. The Gregorian design allows for an adaptive secondary mirror that can be tested off-sky in a straightforward manner. We have fabricated a 85 cm diameter aspheric adaptive secondary with our subcontractors and partners, the ASM passed acceptance tests in July 2010. This secondary has 585 actuators with <1 msec response times (0.7 ms typically). This adaptive secondary will allow low emissivity AO science. We will achieve very high Strehls (~98%) in the Mid-IR (3-26 microns) with the BLINC/MIRAC4 Mid-IR science camera. This will allow the first "super-resolution" and nulling Mid-IR studies of dusty southern objects. We will employ a high order (585 mode) pyramid wavefront sensor similar to that now successfully used at the Large Binocular Telescope. The relatively high actuator count will allow modest Strehls to be obtained in the visible (0.63-1.05 ?m). Moderate (~20%) Strehls have already been obtained at 0.8 ?m at the LBT with the same powerful combination of a next generation ASM and Pyramid WFS as we are providing for Magellan. Our visible light AO (VisAO) science camera is fed by an advanced triplet ADC and is piggy-backed on the WFS optical board. We have designed an additional "clean-up" very fast (2 kHz) tilt stabilization system for VisAO. Also a high-speed shutter will be used to block periods of poor correction. The VisAO facility can be reconfigured to feed an optical IFU spectrograph with 20 mas spaxels. The entire system passed CDR in June 2009, and is now finished the fabrication phase and is entering the integration phase. The system science and performance requirements, and an overview the design, interface and schedule for the Magellan AO system are presented here.

  6. Thioulouse, J., and D. Chessel. 1992. A method for reciprocal scaling of species tolerance and sample diversity. Ecology 73:670-680. http://pbil.univ-lyon1.fr/R/articles/arti071.pdf

    E-print Network

    Thioulouse, Jean

    and sample diversity. Ecology 73:670-680. http://pbil.univ-lyon1.fr/R/articles/arti071.pdf #12;Thioulouse, J 73:670-680. http://pbil.univ-lyon1.fr/R/articles/arti071.pdf #12;Thioulouse, J., and D. Chessel. 1992://pbil.univ-lyon1.fr/R/articles/arti071.pdf #12;Thioulouse, J., and D. Chessel. 1992. A method for reciprocal

  7. IST vai ter Hospital Virtual http://univ.forum.pt/noticias/nacional/1402-ist-vai-ter-hospital-virtual 1 of 3 18-06-2012 16:39

    E-print Network

    Instituto de Sistemas e Robotica

    IST vai ter Hospital Virtual http://univ.forum.pt/noticias/nacional/1402-ist-vai-ter-hospital-virtual 1 of 3 18-06-2012 16:39 #12;Ver todos UNIV TV CONFERÊNCIA 1º EMPREGO EMPREGO IST vai ter Hospital Virtual http://univ.forum.pt/noticias/nacional/1402-ist-vai-ter-hospital-virtual 2 of 3 18-06-2012 16

  8. Testing the VLT AO facility with ASSIST

    NASA Astrophysics Data System (ADS)

    Stuik, Remko; Arsenault, Robin; Boland, Wilfried; Deep, Atul; Delabre, Bernard; Hubin, Norbert; Kolb, Johann; La Penna, Paolo; Molster, Frank; Wiegers, Emiel

    2010-07-01

    The testing and verification of ESO Very Large Telescope Adaptive Optics Facility (VLT-AOF) requires new and innovative techniques to deal with the absence of an intermediate focus on the telescope. ASSIST, The Adaptive Secondary Setup and Instrument STimulator, was developed to provide a testing facility for the ESO AOF and will allow off-telescope testing of three elements of the VLT Adaptive Optics Facility; the Deformable Secondary Mirror (DSM) and the AO systems for MUSE and HAWK-I (GALACSI and GRAAL). ASSIST will provide a full testing environment which includes an interferometric testing mode for the DSM, an on-axis testing mode with a single wavefront sensor and full operation testing modes for both the AO systems. Both natural as well as laser guide stars will be simulated under various asterisms and a realistic turbulent atmosphere will be provided for varying atmospheric conditions. ASSIST passed its final design review and is now being manufactured, integrated and tested and will be operational in mid 2011, in time for first testing with the DSM.

  9. Results of AO simulations for ELTs

    NASA Astrophysics Data System (ADS)

    Conan, Rodolphe; Le Louarn, Miska; Braud, J.; Fedrigo, Enrico; Hubin, Norbert N.

    2003-01-01

    The design and elaboration of Extremely Large Telescopes (ELT) with primary mirror from 20m to 100m face with many challenges: mechanical, optical, computational, etc. To benefit completely of the full potentiality of such facilities, an Adaptive Optics System (AOS) have also to be designed for these telescopes. For whole field--of--view compensation and full sky coverage, the new but promising Multi--Conjugated Adaptive Optics (MCAO) technique has to be envisaged. The first step towards the design of an MCAO system is the numerical simulation. This is the first challenge we have to face. The scale of AO simulations being imposed by the ratio (D/r0), the simulation requirements of a MCAOS for an ELT, in terms of computing power and memory available to store the data, reach and sometimes overcome the capacity of actual computers. In ESO, we have evaluated different hardware and software strategies to achieve MCAO simulations goals. Two codes have been developed to simulate MCAOS using an analytical and an end-to-end model. The goals and advantages/limitations of both approaches is shown. The hardware requirements for both methods is also given through the size of their largest matrices. And finally, results of hardware and software tests for MCAO simulations with PC--cluster and paralleled code are presented.

  10. Departamento de Ci^encia da Computac~ao IME-USP MAC 115 --Introduc~ao `a Computac~ao para Ci^encias Exatas e Tecnologia

    E-print Network

    Reverbel, Francisco

    nos casos em que n~ao h´a c´edulas ou dinheiro suficientes. 1 #12;7 2 1 1 0 5 0 370 0 29 1 0 0 1 5 0 2 Saque de 800 reais n~ao efetuado por falta de dinheiro Situa¸c~ao atual 4 1 1 5 0 2 487 Saque de 78

  11. Analise Matematica III A Ficha 1 Derivac~ao em Rn, Teoremas da Func~ao Inversa e da Func~ao Implicita

    E-print Network

    Ventura, Joana

    An´alise Matem´atica III A ­ Ficha 1 Deriva¸c~ao em Rn, Teoremas da Fun¸c~ao Inversa e da Fun¸c~ao Impl´icita 1. Seja f : R2 R uma fun¸c~ao de classe C2. Seja F(x, y) = f(x3 - y, x2y). Sabendo que f(2, -1) = (1, 4), calcule F(1, -1). 2. Sejam f, g : R R duas fun¸c~oes de classe C2. Seja F(x, y) = f

  12. Parameterized complexity of discrete morse theory Benjamin A. Burton, Thomas Lewiner, Jo~ao Paix~ao

    E-print Network

    Díaz, Lorenzo J.

    Parameterized complexity of discrete morse theory Benjamin A. Burton, Thomas Lewiner, Jo~ao Paix complexity of discrete morse theory Autores : Benjamin A. Burton, Thomas Lewiner, Jo~ao Paix~ao and Jonathan Spreer Palavras Chave : 1. discrete Morse theory 2. parameterized com- plexity 3. fixed parameter tractab

  13. Experiments on the nuclear interactions of pions and electrons. [Dept. of Physics, Univ. of Virginia

    SciTech Connect

    Minehart, R.C.; Ziock, K.O.H.

    1992-08-01

    The analysis of the deuterium content in the CD target used in an experiment to study the [pi] + d [yields] 2p reaction at incident pion energies from 4 to 20 MeV was completed. The final paper describing this experiment will be submitted for publication this summer. Analysis of LAMPF Exp. on pion absorption in [sup 4]He is continuing. In 1991, we collaborated with D. Pocanic from the Univ. of Virginia on a measurement at LAMPF of the [pi][sup 0] production in [pi] + p interactions. This run proved the validity of the method and additional data were obtained in a second run during the summer of 1992, using a new target. Current collaborations at LAMPF include the search for the decay [mu][sup +] [yields] e[sup +] + [gamma](MEGA) and a measurement of the Michel [rho] parameter in the decay [mu] [yields] e + v + v. A U.Va.--PSI collaboration is measuring pion beta decay to an accuracy of less than 1%, using a large acceptance CsI detector to measure the [pi][sup 0] following decay of stopped [pi][sup +] mesons. Most of the U.Va. effort is devoted to the CEBAF Large Acceptance Spectrometer (CLAS) program to the construction of the CLAS forward calorimeter. An apparatus to measure the properties of the scintillators with light from a N[sub 2] laser was built in the spring of 1992. The electronic circuitry for the energy signal from the EGN detector and the circuitry needed to route the signals from the all the photomultipliers to the TDC and ADC circuits are being developed. Experimental proposals for the study of electroproduction of nucleon resonances at CEBAF, including measurements with polarized beam and targets, are being developed.

  14. LGS-AO Imaging of Every Kepler Planet Candidate: the Robo-AO KOI Survey

    NASA Astrophysics Data System (ADS)

    Baranec, Christoph; Law, Nicholas; Morton, Timothy; Ziegler, Carl; Nofi, Larissa; Atkinson, Dani; Riddle, Reed

    2015-12-01

    The Robo-AO Kepler Planetary Candidate Survey is observing every Kepler planet candidate host star with laser adaptive optics imaging, to search for blended nearby stars which may be physically associated companions and/or responsible for transit false positives. We will present the results from searching for companions around over 3,000 Kepler planet hosts in 2012-2015. We will describe our first data release covering 715 planet candidate hosts, and give a preview of ongoing results including improved statistics on the likelihood of false positive planet detections in the Kepler dataset, many new planets in multiple star systems, and new exotic multiple star systems containing Kepler planets. We will also describe the automated Robo-AO survey data reduction methods, including a method of using the large ensemble of target observations as mutual point-spread-function references, along with a new automated companion-detection algorithm designed for extremely large adaptive optics surveys. Our first data release covered 715 objects, searching for companions from 0.15” to 2.5” separation with contrast up to 6 magnitudes. We measured the overall nearby-star-probability for Kepler planet candidates to be 7.4+/-1.0%, and we will detail the variations in this number with stellar host parameters. We will also discuss plans to extend the survey to other transiting planet missions such as K2 and TESS as Robo-AO is in the process of being re-deployed to the 2.1-m telescope at Kitt Peak for 3 years and a higher-contrast Robo-AO system is being developed for the 2.2-m UH telescope on Maunakea.

  15. UNIVErSItyoFEAStANGLIAUNDErGrADUAtEProSPEctUS2016EANGLE14 WELcoME to UEA.

    E-print Network

    St Andrews, University of

    MEWHErE ALIENS coULD cALL HoME. HoW WILL yoU SEArcH For ALIEN LIFE? WWW.UEA.Ac.UK/brILLIANt oUt oF tHIS WorMUMMIES, robotS, yoUtUbE, ALIENS, ANtS, DUAtHLoNS WHAt coULD yoUr UEA bE AboUt? UNIVEr AcHIEVING MorE 1. UNI LIFE 17 NorWIcH 18 ArtS AND cULtUrE 19 SPortS 20 GEttING INVoLVED 21 ENt

  16. Ultima actualizac~ao: 27/Out/2003 Instituto Superior Tecnico

    E-print Network

    Cannas da Silva, Ana

    sse A ´e injectiva (condi¸c~ao necess´aria: m n); · A ´e invert´ivel `a direita sse A ´e sobrejectiva (condi¸c~ao necess´aria: m n); · condi¸c~ao necess´aria (n~ao suficiente) para que A seja invert´ivel: m real, parte imagin´aria, m´odulo, argumento, opera¸c~oes Se v1, . . . , vn formam uma base de um espa

  17. NFIRAOS Multiconjugate AO System for TMT

    NASA Astrophysics Data System (ADS)

    Herriot, Glen; Andersen, David; Atwood, Jenny; Byrnes, Peter; Boyer, Corinne; Caputa, Kris; Correia, Carlos; Dunn, Jennifer; Ellerbroek, Brent; Fitzsimmons, Joeleff; Gilles, Luc; Hickson, Paul; Hill, Alexis; Pazder, John; Reshetov, Vlad; Smith, Malcolm; Véran, Jean-Pierre; Wang, Lianqi; Wevers, Ivan

    2011-09-01

    NFIRAOS, the Adaptive Optics system for the Thirty Meter Telescope, is a Multiconjugate Adaptive Optics System of order 60x60 with two deformable mirrors and six laser guide star wavefront sensors. NFIRAOS is 8 x 10 x 5 m (L x W x H) on a Nasmyth Platform and supports three client instruments operating over 0.8 - 2.5 ?m wavelength range. In this paper we discuss: NFIRAOS' requirements and architecture; changes to NFIRAOS since the last AO4ELT conference; interior details of NFIRAOS; interfaces to instruments; integration and verification plans. Top-level science requirements include 50% sky coverage at the galactic pole with <187 nm wavefront error. Astrometry is an important science driver - to minimize image distortion, we have recently revised the optical design to use four off-axis paraboloidal mirrors. We have vastly simplified the laser WFS zoom optics and moved them inside the cold enclosure. To control image magnification, differential magnification and tip/tilt/focus, NFIRAOS' client instruments have three low-order warfront sensors monitoring near-infrared natural guide stars. These stars are sharpened by NFIRAOS, which assists sky coverage. NFIRAOS will have high throughput and low thermal background - it will be cooled to -30 °C. The insulated walls have a buried cold plate to intercept heat leakage and isothermalize the interior of NFIRAOS. Instruments have stringent requirements on heat leakage and must provide their own rotator and interface to NFIRAOS, including a rotating seal. For wavelength and flat field calibration of client instruments, a NFIRAOS Science Calibration Unit (NSCU) feeds light in the entrance window, through NFIRAOS, to instruments. Inside NFIRAOS are deployable light sources simulating natural and laser guide stars, a focal plane mask with pinholes illuminated by the NSCU, as well as a turbulence phase screen. A prototype screen has been manufactured by magneto-rheological machining. We are currently updating the NFIRAOS preliminary design.

  18. Departamento de Ci^encia da Computac~ao IME-USP Segundo Semestre de 2010 MAC 115 Introduc~ao `a Computac~ao IF

    E-print Network

    Kohayakawa, Yoshiharu

    . (Enunciaremos esse teorema a seguir.) Blaise Pascal,1 outro matem´atico franc^es, provou v´arios resultados not Pascal em http://en.wikipedia.org/wiki/Blaise Pascal 1 #12;Considere agora Tn o Tri^angulo de Pascal m¸c~ao `a Computa¸c~ao ­ IF n k Brincando com Lucas e Pascal Primeiro Exerc´icio-Programa (EP1) Entrega: 27

  19. Optimally Robust Kalman Filtering at Work: AO-, IO-, and Simultaneously IO-and AO-Robust Filters

    E-print Network

    Ruckdeschel, Peter

    Optimally Robust Kalman Filtering at Work: AO-, IO-, and Simultaneously IO- and AO- Robust Filters Abstract We take up optimality results for robust Kalman filtering from Ruckdeschel (2001, 2010) where. (2006), Fried et al. (2007). Keywords: robustness, Kalman Filter, innovation outlier, additive outlier

  20. AO 0235+164 and Surrounding Field: Surprising HST Results

    NASA Technical Reports Server (NTRS)

    Burbidge, E. M.; Beaver, E. A.; Cohen, Ross D.; Junkkarinen, V. T.; Lyons, R. W.

    1996-01-01

    Results obtained with the Hubble Space Telescope on the highly variable radio, x-ray, and gamma-ray emitting QSO (or BL Lac object) AO 0235 + 164 are presented and analyzed. WFPC2 images were obtained in 1994 June, when AO 0235 + 164 was bright (m approx. 17), and the results are described in Sec. 3. After subtraction of the PSF of the QSO, hereafter called AO following the nomenclature of Yanny et al. (1989), the companion object named A, 2 sec south of AO, is discovered not to be an elliptical galaxy as hypothesized earlier, but to be an AGN object, with a central UV-bright point-source nucleus and faint surrounding nebulosity extending to AO. The second companion object 1.3 sec east of AO discovered by Yanny et al. (1989) and named object Al, appears more like a normal spiral galaxy. We have measured the positions, luminosities, and colors of some 30 faint objects in the field around AO 0235 + 16; most are extended and may be star-forming galaxies in a loose group or cluster. Our most surprising result of the HST observations comes from FOS spectra obtained in 1995 July, discussed in Sec. 4. Because of a positioning error of the telescope and AO's faintness at that time (m approx. 20), object A was observed instead of the intended target AO. Serendipitously, we discovered A to have broad deep BALQSO-type absorptions of C IV, Si IV, N V shortward of broad emissions. A is thus ejecting high velocity, highly ionized gas into the surrounding IGM. We discuss in Sec. 5 the relationship of the objects in the central 10 sec X 1O sec region around AO, where redshifts z(sub e) = 0.94, z(sub a) = 0.524, 0.851 in AO, (sub e) = 0.524 and Z(sub BAL)=0.511 in A, are found. We hypothesize that some of the 30 faint objects in the 77 sec. x 77 sec. field may be part of a large star-forming region at z approx. 0.5, as suggested for a few objects by Yanny et al. (1989). The proximity of two highly active extragalactic objects, AO 0235+164 and its AGN companion A, is remarkable and one of the authors (EMB) suggests it may require consideration of a non-cosmological component of redshift in AO 0235+164.

  1. AO 0235 + 164 and Surrounding Field: Surprising HST Results

    NASA Astrophysics Data System (ADS)

    Burbidge, E. M.; Beaver, E. A.; Cohen, Ross D.; Junkkarinen, V. T.; Lyons, R. W.

    1996-12-01

    Results obtained with the Hubble Space Telescope on the highly variable radio, x-ray, and ?-ray emitting QSO (or BL Lac object) AO 0235+164 are presented and analyzed. WFPC2 images were obtained in 1994 June, when AO 0235+164 was bright (m ~ 17), and the results are described in Sec. 3. After subtraction of the PSF of the QSO, hereafter called AO following the nomenclature of Yanny et al. (1989), the companion object named A, 2" south of AO, is discovered not to be an elliptical galaxy as hypothesized earlier, but to be an AGN object, with a central UV-bright point-source nucleus and faint surrounding nebulosity extending to AO. The second companion object 1.3" east of AO discovered by Yanny et al. (1989) and named object A1, appears more like a normal spiral galaxy. We have measured the positions, luminosities, and colors of some 30 faint objects in the field around AO 0235+164; most are extended and may be star- forming galaxies in a loose group or cluster. Our most surprising result of the HST observations comes from FOS spectra obtained in 1995 July, discussed in Sec. 4. Because of a positioning error of the telescope and AO's faintness at that time (m20), object A was observed instead of the intended target AO. Serendipitously, we discovered A to have broad deep BALQSO-type absorptions of C IV, Si IV, H V shortward of broad emissions. A is thus ejecting high velocity, highly ionized gas into the surrounding IGM. We discuss in Sec. 5 the relationship of the objects in the central 10" x 10" region around AO, where redshifts z_e_ = 0.94, z_a_ = 0.524, 0.851 in AO, z_e_ = 0.524 and z_BAL_ = 0.511 in A, are found. We hypothesize that some of the 30 faint objects in the 77" x 77" field may be part of a large star-forming region at z ~ 0.5, as suggested for a few objects by Yanny et al. (1989). The proximity of two highly active extragalactic objects, AO 0235 + 164 and its AGN companion A, is remarkable and one of the authors (EMB) suggests it may require consideration of a non-cosmological component of redshift in AO 0235+164.

  2. OSU Human Resources Page 1 of 6 G:\\FORMS\\Univ\\termination-separation-checklist final.doc modified 8/2012 TERMINATION SEPARATION CHECKLIST

    E-print Network

    OSU Human Resources Page 1 of 6 G:\\FORMS\\Univ\\termination-separation-checklist final.doc modified 8/2012 TERMINATION ­ SEPARATION CHECKLIST Faculty, Staff, and Graduate Assistants Oklahoma State University The following checklists are provided to highlight the range of issues that may need to be addressed when

  3. KEPLER et la recherche d'une explication gomtrique de l'Univers D'aprs Mysterium cosmographicum (Le secret du monde) publi en 1596

    E-print Network

    Jeanjean, Louis

    KEPLER et la recherche d'une explication géométrique de l'Univers D'après Mysterium cosmographicum Terre et les autres planètes se déplacent autour du Soleil. Kepler défend le modèle héliocentrique, et Jupiter et de Saturne, Kepler remarque que l'on peut mettre entre les deux un triangle équilatéral de

  4. Universit de Pau et des Pays de l'Adour 1/2 CONTACT : -Emilie Desconet emilie.desconet@univ-pau.fr

    E-print Network

    Greff, Isabelle

    Université de Pau et des Pays de l'Adour 1/2 CONTACT : - Emilie Desconet emilie diplômant (grado, post-grado). #12;Université de Pau et des Pays de l'Adour 2/2 CONTACT : - Emilie Desconet emilie.desconet@univ-pau.fr 4/ Durée de la mobilité et nombre d'heures d'enseignement à dispenser La

  5. AppAlAchiAn StAte UniverSity UndergrAdUAte BUlletin 2009-2010 The College of Arts and Sciences

    E-print Network

    Thaxton, Christopher S.

    AppAlAchiAn StAte UniverSity UndergrAdUAte BUlletin 2009-2010 The College of Arts and Sciences and Sciences connects Appalachian State University to the tradition of the liberal arts. Faculty and staff of advanced degrees. the college encourages study in diverse local, regional, national, and international

  6. Universit de Franche-Comt Bureau doctoral -03 81 66 58 67 / 06 69 13 66 22 / formations.doctorales@univ-fcomte.fr

    E-print Network

    Jeanjean, Louis

    . Intervenant(s) Jean-Christophe DELBENDE (enseignant titulaire au CLA, intervenant à l'IPAG et à l'IUT) Nombre.doctorales@univ-fcomte.fr Votre message doit OBLIGATOIREMENT préciser vos NOM, Prénom, école doctorale, équipe de recherche, l

  7. Li et al. / J Zhejiang Univ Sci A 2009 10(1):72-8172 On the vein-stiffening membrane structure of

    E-print Network

    Vu-Quoc, Loc

    Li et al. / J Zhejiang Univ Sci A 2009 10(1):72-8172 On the vein-stiffening membrane structure at exploring the excellent structural performance of the vein-stiffening membrane structure of dragonfly hind corrugation based on the finite element method. It is shown that the vein size in different zones

  8. Last First Class DegreeEmployer Dept. City State Advisor Grove Cornelius 1928 BS North Carolina State Univ ChE Raleigh NC

    E-print Network

    Velev, Orlin D.

    1930 BS Southeastern Mass Chem N Dartmouth MA Belvin Bill 1932 BS University of Arkansas ChE Fayetteville AK LeForte Romeo 1932 BS North Carolina State Univ Dean Raleigh NC Johnson Franklin 1935 BS North NC Overcash Michael 1966 BS Wichita State University IME Wichita KS Simpson Leo 1967 BS Seattle

  9. Plasma PhysicsUnivMaryland 19-21Apr2004 Intrator 3D flux tubes 1 Magnetic reconnection, merging flux ropes,

    E-print Network

    Sitnov, Mikhail I.

    Plasma PhysicsUnivMaryland 19-21Apr2004 Intrator 3D flux tubes 1 Magnetic reconnection, merging data that two or three flux ropes can twist, braid and merge, annihilating flux to form a composite of flux ropes independently of each other. Magnetic reconnection, merging flux ropes and 3D effects in RSX

  10. 28.1.2015bo Akademi Univ -Thermal and Flow Engineering Piispankatu 8, 20500 Turku 1/54 Solar energy (thermal, PV)

    E-print Network

    Zevenhoven, Ron

    Turku 2/54 2b.1 Solar energy #12;28.1.2015Åbo Akademi Univ - Thermal and Flow Engineering Piispankatu 8, 20500 Turku 3/54 Potential Solar energy could within one hour provide the energy that is used in all surface temperature Solar energy irradiation can be used to estimate planet surface temperature T

  11. Interaction of Phenol and Aniline with Montmorillonite and llliti. D.L. SPARKS and P.C. ZHANG*. Univ. of Delaware.

    E-print Network

    Sparks, Donald L.

    Interaction of Phenol and Aniline with Montmorillonite and llliti. D.L. SPARKS and P.C. ZHANG*. Univ. of Delaware. The interaction of phenol and aniline with montmorillonite ' and illite at low. biodegradation and organic matter. When organic matter wa's removed. no adsorption of phenol on montmorillonite

  12. Garland, T., Jr. 1993. Physical activity and health. (Review of volume edited by N. G. Norgan, Cambridge Univ. Press, Cambridge, 1992). The Physiologist 36:260-261.

    E-print Network

    Saltzman, Wendy

    , Cambridge Univ. Press, Cambridge, 1992). The Physiologist 36:260-261. Note: this is the original, submitted and Health N. G. Norgan (Editor). Cambridge, U.K.: Cambridge University Press, 1992, 251 pp., illus., index: "Surely, at no time in human history, has such useless and selfish exercise been undertaken by so many

  13. The Subaru Coronagraphic Extreme AO Project: Progress and Upgrades

    NASA Astrophysics Data System (ADS)

    Jovanovic, Nemanja; Martinache, F.; Guyon, O.; Clergeon, C.; Garrel, V.

    2013-01-01

    The Subaru Coronagraphic Extreme AO (SCExAO) instrument consists of a high performance Phase Induced Amplitude Apodisation (PIAA) coronagraph combined with an extreme Adaptive Optics (AO) system operating in the near-infrared (H band). The extreme AO system driven by the 2000 element deformable mirror will allow for Strehl ratios>90% to be achieved in the H-band when it goes closed loop. This makes the SCExAO instrument a powerful platform for high contrast imaging down to angular separations of the order of 1 ?/D. In this paper we report on the recent progress in regards to the development of the instrument, which includes the addition of a visible bench that makes use of the light at shorter wavelengths not currently utilized by SCExAO and closing the loop on the tip/tilt wavefront sensor. We will also discuss two exciting guest instruments which will expand the capabilities of SCExAO over the next few years; namely CHARIS which is a integral field spectrograph as well as VAMPIRES, a visible aperture masking experiment based on polarimetric analysis of circumstellar disks.

  14. SCExAO: First Results and On-Sky Performance

    NASA Astrophysics Data System (ADS)

    Currie, Thayne; Guyon, Olivier; Martinache, Frantz; Clergeon, Christophe; McElwain, Michael; Thalmann, Christian; Jovanovic, Nemanja; Singh, Garima; Kudo, Tomoyuki

    2014-01-01

    We present new on-sky results for the Subaru Coronagraphic Extreme Adaptive Optics imager (SCExAO) verifying and quantifying the contrast gain enabled by key components: the closed-loop coronagraphic low-order wavefront sensor (CLOWFS) and focal plane wavefront control (``speckle nulling''). SCExAO will soon be coupled with a high-order, Pyramid wavefront sensor which will yield > 90% Strehl ratio and enable 106-107 contrast at small angular separations allowing us to image gas giant planets at solar system scales. Upcoming instruments like VAMPIRES, FIRST, and CHARIS will expand SCExAO's science capabilities.

  15. SCExAO: First Results and On-Sky Performance

    NASA Technical Reports Server (NTRS)

    Currie, Thayne; Guyon, Olivier; Martinache, Frantz; Clergeon, Christophe; McElwain, Michael; Thalmann, Christian; Jovanovic, Nemanja; Singh, Garima; Kudo, Tomoyuki

    2013-01-01

    We present new on-sky results for the Subaru Coronagraphic Extreme Adaptive Optics imager (SCExAO) verifying and quantifying the contrast gain enabled by key components: the closed-loop coronagraphic low-order wavefront sensor (CLOWFS) and focal plane wavefront control ("speckle nulling"). SCExAO will soon be coupled with a high-order, Pyramid wavefront sensor which will yield greater than 90% Strehl ratio and enable 10(exp 6) -10(exp 7) contrast at small angular separations allowing us to image gas giant planets at solar system scales. Upcoming instruments like VAMPIRES, FIRST, and CHARIS will expand SCExAO's science capabilities.

  16. Crystal growth and morphology of hindered phenol AO-60

    NASA Astrophysics Data System (ADS)

    Cao, Yuanyi; Wang, Shaolei; Mou, Haiyan; Xu, Haiyan; Wu, Chifei

    2010-04-01

    Crystal growth of a hindered phenol compound, tetrakis [methylene-3-(3-5-ditert-butyl-4-hydroxy phenyl) propionyloxy] methane (trade name AO-60), was successfully recorded by optical microscopy (OM) equipped with a hot stage. The morphology of AO-60 crystals, grown at 100 °C from amorphous state, appeared in the form of tetragonal-sloped step growth. Further study using scanning electron microscopy (SEM) and atomic force microscopy (AFM) experimentally demonstrated that AO-60 crystals had a hopper-like morphology, which had occurred rarely in the condition of organic compound crystals but predominantly rather to inorganic compound crystals in the reported literatures. The morphological features observed on the crystal surfaces suggested step growth and hopper growth mechanism. Besides, a raising around the edge of the AO-60 hopper crystal was also experimentally characterized for the first time.

  17. WALTER CARNIELLI, MARCELO E. CONIGLIO AND JO~AO MARCOS

    E-print Network

    Lisboa, Universidade Técnica de

    that negation is available. This is an effect of an ordinary logical feature known as `explosiveness': According. CONIGLIO AND JO~AO MARCOS Moreover, our chapter starts from clear-cut abstract definitions of the terms

  18. Anomalous Eurasian snow extent and the wintertime AO

    E-print Network

    Lundgren, Elizabeth Whitin

    2009-01-01

    The winter mode of the Arctic Oscillation (AO) is the dominating influence on extratropical winter climate variability in the Northern Hemisphere (NH) . The phase of the Arctic Oscillation is characterized by trends in ...

  19. Establishing Enterprise Communities Constantin Serban, Xuhui Ao, Naftaly Minsky

    E-print Network

    Minsky, Naftaly

    Establishing Enterprise Communities Constantin Serban, Xuhui Ao, Naftaly Minsky {serban important challenges facing the builders of enterprise software is the reliable implementation of the policies that are supposed to govern the various communities operating within an enterprise. Such policies

  20. Establishing Enterprise Communities # Constantin Serban, Xuhui Ao, Naftaly Minsky

    E-print Network

    Minsky, Naftaly

    Establishing Enterprise Communities # Constantin Serban, Xuhui Ao, Naftaly Minsky {serban important challenges facing the builders of enterprise software is the reliable implementation of the policies that are supposed to govern the various communities operating within an enterprise. Such policies

  1. ARTIGO INTERNET Aceleradores laser-plasma avanam aos ombros de

    E-print Network

    Instituto de Sistemas e Robotica

    partículas ­ laser- plasma. O novo conceito usa os princípios da Relatividade de Einstein de que o espaço e o invariantes para transformações de Lorentz e obedecem aos princípios da relatividade restrita. O aspecto

  2. Ultima actualizac~ao: 8/Dez/2005 Departamento de Matematica

    E-print Network

    Cannas da Silva, Ana

    hemisf´erio da esfera unit´aria cen- trada no ponto (1, 0, 1). Em coordenadas esf´ericas adaptadas (x, y) Usando a defini¸c~ao, calcule o fluxo de F atrav´es de A segundo a normal unit´aria que satisfaz (0, 1 a normal unit´aria que satisfaz (0, 2, 0) = (0, 1, 0). Resolu¸c~ao: (a) Parametriza-se A usando

  3. Geodesicas Nulas em Relatividade Geral Francisco Jo~ao Lopes

    E-print Network

    Natário, José

    Geod´esicas Nulas em Relatividade Geral Francisco Jo~ao Lopes Instituto Superior T´ecnico, Lisboa¸co de 2013 Resumo Pretende-se estudar raios de luz, ou seja, geod´esicas nulas, em Relatividade Geral´icio do s´eculo XX, com a cria¸c~ao da Teoria da Relatividade Restrita, por Einstein (que postulou que

  4. LGS AO Science Impact: Present and Future Perspectives

    E-print Network

    Michael C. Liu

    2008-07-10

    The recent advent of laser guide star adaptive optics (LGS AO) on the largest ground-based telescopes has enabled a wide range of high angular resolution science, previously infeasible from ground-based and/or space-based observatories. As a result, scientific productivity with LGS has seen enormous growth in the last few years, with a factor of ~10 leap in publication rate compared to the first decade of operation. Of the 54 refereed science papers to date from LGS AO, half have been published in the last ~2 years, and these LGS results have already made a significant impact in a number of areas. At the same time, science with LGS AO can be considered in its infancy, as astronomers and instrumentalists are only beginning to understand its efficacy for measurements such as photometry, astrometry, companion detection, and quantitative morphology. We examine the science impact of LGS AO in the last few years of operations, largely due to the new system on the Keck II 10-meter telescope. We review currently achieved data quality, including results from our own ongoing brown dwarf survey with Keck LGS. We assess current and near-future performance with a critical eye to LGS AO's capabilities and deficiencies. From both qualitative and quantitative considerations, it is clear that the era of regular and important science from LGS AO has arrived.

  5. http://www-lipn.univ-paris13.fr/~petrucci/PAPERS In Proc. Workshop on Practical Use of Coloured Petri Nets (CPN'2004), Aarhus, Denmark, pages 3956, October 2004.

    E-print Network

    Petrucci, Laure

    http://www-lipn.univ-paris13.fr/~petrucci/PAPERS In Proc. Workshop on Practical Use of Coloured of transitions. It represents an important benefit for debugging. It also permits to make a direct correspondence

  6. ASSIST: the test setup for the VLT AO facility

    NASA Astrophysics Data System (ADS)

    Stuik, Remko; Arsenault, Robin; Conzelmann, Ralf; Deep, Atul; Delabre, Bernard; Hallibert, Pascal; Jolissaint, Laurent; Hubin, Norbert; Kendrew, Sarah; Madec, Pierre-Yves; Molster, Frank; Paufique, Jerome; Pauwels, Evert; Stroebele, Stefan; Wiegers, Emiel

    2008-07-01

    ASSIST: The Adaptive Secondary Setup and Instrument STimulator is the test setup for the verification and calibration of three elements of the VLT Adaptive Optics Facility.; the Deformable Secondary Mirror (DSM) the AO system for MUSE and HAWK-I (GALACSI and GRAAL). In the DSM testing mode the DSM will be tested using both interferometry and fast wave front sensing. In full AO mode, ASSIST will allow testing of the AO systems under realistic atmospheric conditions and optically equivalent to the conditions on the telescope. ASSIST is nearing its final design review and in this paper we present the current optical and mechanical design of ASSIST. In this paper we highlight some of the specific aspects of ASSIST that we are developing for ASSIST.

  7. Second generation Robo-AO instruments and systems

    NASA Astrophysics Data System (ADS)

    Baranec, Christoph; Riddle, Reed; Law, Nicholas M.; Chun, Mark R.; Lu, Jessica R.; Connelley, Michael S.; Hall, Donald; Atkinson, Dani; Jacobson, Shane

    2014-07-01

    The prototype Robo-AO system at the Palomar Observatory 1.5-m telescope is the world's first fully automated laser adaptive optics instrument. Scientific operations commenced in June 2012 and more than 12,000 observations have since been performed at the ~0.12" visible-light diffraction limit. Two new infrared cameras providing high-speed tip-tilt sensing and a 2' field-of-view will be integrated in 2014. In addition to a Robo-AO clone for the 2-m IGO and the natural guide star variant KAPAO at the 1-m Table Mountain telescope, a second generation of facility-class Robo-AO systems are in development for the 2.2-m University of Hawai'i and 3-m IRTF telescopes which will provide higher Strehl ratios, sharper imaging, ~0.07", and correction to ? = 400 nm.

  8. UNivErsity of MiaMi rosENstiEl school of MariNE aNd atMosphEric sciENcE

    E-print Network

    Miami, University of

    frequent than current events; Peru specifically has been an area heavily affected by these severeEl Niño UNivErsity of MiaMi rosENstiEl school of MariNE aNd atMosphEric sciENcE 4600 rickenbacker current flowing along the coast. The El Niño phenomenon actu- ally begins much further west in the Pacific

  9. A Shared FutureThe Florida STaTe UniverSiTy FoUndaTion 20122013 annUal reporT

    E-print Network

    McQuade, D. Tyler

    A Shared FutureThe Florida STaTe UniverSiTy FoUndaTion 2012­2013 annUal reporT #12;As you review technologies -- making the top 25 goal a reality. The theme for this year's Annual Report is sharing -- a shared passion, spirit, vision and legacy -- and it seems truly fitting, as we wouldn't have the myriad

  10. GRASP e Otimizac~ao Global Continua Douglas S. Goncalves ,

    E-print Network

    Gomes, Francisco A. M.

    ¸c~oes diversificadas e de boa qualidade para a fase de busca local. Uma proposta alternativa para a fase local ´e¸c~ao aleat´oria para produzir um conjunto diversificado de solu¸c~oes de boa qualidade que servem de ponto

  11. Modelo Análogo Acústico ao Buraco Negro de Schwarzschild

    E-print Network

    Júnior Diniz Toniato

    2011-04-13

    Um fluido em movimento pode agir sobre o som da mesma forma que os espa\\c{c}o-tempos curvos podem influenciar na trajet\\'oria da luz na relatividade geral. Com isso, pode-se descrever a propaga\\c{c}\\~ao dessas ondas sonoras atrav\\'es de uma m\\'etrica efetiva, sob a qual elas seguir\\~ao geod\\'esicas nulas. Esta disserta\\c{c}\\~ao faz uma revis\\~ao destes estudos concentrando-se em uma analogia ac\\'ustica para um buraco negro de Schwarzschild, demonstrando suas vantagens e limita\\c{c}\\~oes quando aplicada para o estudo da teoria de Hawking. A fluid in moviment can act on the sound the same way that curved space-time can influence on light trajectory in the general relativity. So, one can describe the propagation these sound waves through an effective metric, under wich they will follow null geodesics. This thesis makes a review of these studies focusing in an analogy to Schwarzschild black hole using an acoustic system, showing its advantages and limitations when applied in the study of Hawking's theory.

  12. AO14: Detection of Aircraft Emission Signatures in Atmospheric Spectra

    E-print Network

    Oxford, University of

    AO14: Detection of Aircraft Emission Signatures in Atmospheric Spectra Supervisors: Dr A. Dudhia, Dr C. Piccolo Candidate Number: 26912 Abstract Commercial jet aircraft are known to have both industry predicted to grow at a rate of 5% per year until at least 2015, a study of the impact of aircraft

  13. Engenharia de Sistemas e Computac~ao Sistemas e Sinais

    E-print Network

    Jesus, Sérgio M.

    no tempo Semana 4 T 3. An´alise harm´onica generalizada Integral de Fourier Propriedades e exemplos Fam Folha 2 - an´alise harm´onica Semana 6 T Mini-teste escrito Rela¸c~ao com a Trasformada de Laplace TF da

  14. Course Material Model in A&O Learning Environment.

    ERIC Educational Resources Information Center

    Levasma, Jarkko; Nykanen, Ossi

    One of the problematic issues in the content development for learning environments is the process of importing various types of course material into the environment. This paper describes a method for importing material into the A&O open learning environment by introducing a material model for metadata recognized by the environment. The first…

  15. SERVIOS AO Portaria n 461/2013/GR

    E-print Network

    Floeter, Sergio Ricardo

    Serviços ao Cidadão da Universidade Federal de Santa Catarina (UFSC) Revisão: Gésyka Mafra Silva - GR Miashiro Lima Julian Borba Rogério Luiz de Souza Joana Maria Pedro Juarez Vieira do Nascimento Jamil Raquel Antônio Carlos Montezuma Brito Lúcia Maria Loch Góes Denise Cord Maurício Mello Petrucio Elci

  16. Anonymous signature scheme Chunbo Ma and Jun Ao

    E-print Network

    International Association for Cryptologic Research (IACR)

    Anonymous signature scheme Chunbo Ma and Jun Ao School of Information and Communication, Guilin. In order to hide the identity of a signer, an anonymous signature scheme is presented in this paper the signature to its source is impossible. The proposed anonymous signature is similarly to ring signature

  17. Experimental study on the thorium-loaded accelerator-driven system at the Kyoto Univ. critical assembly

    SciTech Connect

    Pyeon, C. H.; Yagi, T.; Lim, J. Y.; Misawa, T.

    2012-07-01

    The experimental study on the thorium-loaded accelerator-driven system (ADS) is conducted in the Kyoto Univ. Critical Assembly (KUCA). The experiments are carried out in both the critical and subcritical states for attaining the reaction rates of the thorium capture and fission reactions. In the critical system, the thorium plate irradiation experiment is carried out for the thorium capture and fission reactions. From the results of the measurements, the thorium fission reactions are obtained apparently in the critical system, and the C/E values of reaction rates show the accuracy of relative difference of about 30%. In the ADS experiments with 14 MeV neutrons and 100 MeV protons, the subcritical experiments are carried out in the thorium-loaded cores to obtain the capture reaction rates through the measurements of {sup 115}In(n, {gamma}){sup 116m}In reactions. The results of the experiments reveal the difference between the reaction rate distributions for the change in not only the neutron spectrum but also the external neutron source. The comparison between the measured and calculated reaction rate distributions demonstrates a discrepancy of the accuracy of reaction rate analyses of thorium capture reactions through the thorium-loaded ADS experiments with 14 MeV neutrons. Hereafter, kinetic experiments are planned to be carried out to deduce the delayed neutron decay constants and subcriticality using the pulsed neutron method. (authors)

  18. Um Modelo de Gest~ao E ciente de Recursos Computacionais Marcos Castilho Renato Carmo

    E-print Network

    Hexsel, Roberto A

    ~ao. A implementa#24;c~ao da solu#24;c~ao exposta, fortemente baseada no uso de Software Livre e no rea compatibilidade, seguran#24;ca, atualiza#24;c~ao, desempenho, etc, que acabam por consumir todas as energias dos

  19. Apple fruit copper amine oxidase isoforms: peroxisomal MdAO1 prefers diamines as substrates, whereas extracellular MdAO2 exclusively utilizes monoamines.

    PubMed

    Zarei, Adel; Trobacher, Christopher P; Cooke, Alison R; Meyers, Ashley J; Hall, J Christopher; Shelp, Barry J

    2015-01-01

    4-Aminobutyrate (GABA) accumulates in apple fruit during controlled atmosphere storage. A potential source of GABA is the polyamine putrescine, which can be oxidized via copper-containing amine oxidase (CuAO), resulting in the production 4-aminobutanal/?(1)-pyrroline, with the consumption of O2 and release of H2O2 and ammonia. Five putative CuAO genes (MdAO genes) were cloned from apple (Malus domestica Borkh. cv. Empire) fruit, and the deduced amino acid sequences found to contain the active sites typically conserved in CuAOs. Genes encoding two of these enzymes, MdAO1 and MdAO2, were highly expressed in apple fruit and selected for further analysis. Amino acid sequence analysis predicted the presence of a C-terminal peroxisomal targeting signal 1 tripeptide in MdAO1 and an N-terminal signal peptide and N-glycosylation site in MdAO2. Transient expression of green fluorescent fusion proteins in Arabidopsis protoplasts or onion epidermal cells revealed a peroxisomal localization for MdAO1 and an extracellular localization for MdAO2. The enzymatic activities of purified recombinant MdAO1 and MdAO2 were measured continuously as H2O2 production using a coupled reaction. MdAO1 did not use monoamines or polyamines and displayed high catalytic efficiency for 1,3-diaminopropane, putrescine and cadaverine, whereas MdAO2 exclusively utilized aliphatic and aromatic monoamines, including 2-phenylethylamine and tyramine. Together, these results indicate that MdAO1 may contribute to GABA production via putrescine oxidation in the peroxisome of apple fruit under controlled atmosphere conditions. MdAO2 seems to be involved in deamination of 2-phenylethylamine, which is a step in the biosynthesis of 2-phenylethanol, a contributor to fruit flavor and flower fragrance. PMID:25378687

  20. Ultima actualizac~ao: 17/4/2002 Instituto Superior Tecnico

    E-print Network

    Cannas da Silva, Ana

    reflec- tion" em ingl^es), ou seja, ´e a composi¸c~ao de uma reflex~ao com uma transla¸c~ao ao longo de). As justifica¸c~oes encontram-se na p´agina 69 do livro (em ingl^es) pela Mich`ele Audin. Um transla¸c~ao (n

  1. AVALIAC ~AO DO MODELO DE ONDAS O modelo de onda WAVEWATCH implementado operacionalmente no CP-

    E-print Network

    `a ob- serva¸c~ao do sat´elite. No espa¸co, aplicou-se uma interpola¸c~ao bi-c´ubica, e no tempo, uma tempo referentes `a localiza¸c~ao do sat´elite. Os eixos x e y representam, respectivamente, o tempo em sat´elite no tempo i. - A vari^ancia ´e uma medida do espalhamento da distribu¸c~ao ao redor da m

  2. HAMP-Protocolo de Difus~ao em Grupo Para Redes Com Padr~oes de Mobilidade Heterogeneos

    E-print Network

    Rodrigues, Luís E.T.

    ~ao tipicamente baseadas em inundac¸~ao (do Ingl^es, flooding) melhorada. Estas adaptam-se bem a alterac¸~oes na¸o em MANETs. A. Difus~ao N~ao Selectiva A difus~ao n~ao selectiva (do Ingl^es, broadcast) pode ser

  3. Holocene Evolution of Qing'ao Embayment, Southern China

    NASA Astrophysics Data System (ADS)

    Switzer, A. D.; Yu, F.; Chen, B.; Zheng, Z.; Wang, D.

    2012-12-01

    The Holocene evolution of the Qing'ao embayment, Nan'ao Island, southern China, is primarily the result of the interaction of tectonic activity, climate variation and changes in relative sea level. Characterizing the evolutionary history of the relatively small Qing'ao embayment during the Holocene will help improve our understanding of the driving mechanisms of coastal evolution in the area. To reconstruct the Holocene evolution history we analyzed the grain size, loss on ignition (LOI) and carbonate content of modern and core samples. Modern environmental analogs were examined in surface samples ranging from the coastal sand dunes through to offshore. The results of these modern samples suggest that dune sand (mean size of ~2.33Phi) are slightly finer than beach sand (mean size of 2.13Phi), and nearshore sediment is much coarser than offshore sediment (mean size of 5.90Phi). This modern analogs were then applied to 8 percussion cores from the Qing'ao embayment. A chronological framework obtained from 11 radiocarbon samples suggests that the embayment started to accept deposition since early Holocene, ~8500 cal. yr. BP. Three main phases of Holocene evolution were identified. A basin wide shell-rich sand sheet forms the basal Holocene facies and overlies clay rich presumably Pleistocene sediments or bedrock. This facies records an initial sedimentation phase associated with the early Holocene transgression into the embayment (~8500-6000 cal. yr. BP). The basal facies grades upward to a mixed sandy-mud facies which includes lagoonal clayey-silts, flood tide delta sands and records an estuarine phase lasting from ~6000-1000 cal. yr. BP that appears coincident with falling regional sea levels. Coincident with the estuarine phase is a period of coastal dune building recorded as yet undated massive sands that are found in the upper fill. Toward the end of the estuarine phase it is apparent that dune migration has restricted the lagoon entrance and that this was contemporaneous with the final stages of infilling of the lagoon. The final phase of sedimentation is recorded as a thin terrestrial sequence dominated by fluvial floodplain facies that covers the last ~1000 cal. yr. BP and is topped by soils that also record enhanced anthropogenic modification over the last 1000 years. Our early results suggest that sea level and accomodation space are the main drivers for evolution of the Qing'ao embayment, as climate change during the Holocene in this region is relatively insignificant. However, as this area is reported to be tectonically active the impact of the tectonic movements on the evolution of Qing'ao embayment still requires further investigation.

  4. High-Resolution Imaging of Asteroids/Satellites with AO

    NASA Astrophysics Data System (ADS)

    Merline, William

    2012-02-01

    We propose to make high-resolution observations of asteroids using AO, to measure size, shape, and pole position (spin vectors), and/or to search for satellites. We have demonstrated that AO imaging allows determination of the pole/dimensions in 1 or 2 nights on a single target, rather than the years of observations with lightcurve inversion techniques that only yield poles and axial ratios, not true dimensions. Our new technique (KOALA) combines AO imaging with lightcurve and occultation data for optimum size/shape determinations. We request that LGS be available for faint targets, but using NGS AO, we will measure several large and intermediate asteroids that are favorably placed in spring/summer of 2012 for size/shape/pole. Accurately determining the volume from the often-irregular shape allows us to derive densities to much greater precision in cases where the mass is known, e.g., from the presence of a satellite. We will search several d! ozen asteroids for the presence of satellites, particularly in under-studied populations, particularly NEOs (we have recently achieved the first-ever optical image of an NEO binary [Merline et al. 2008b, IAUC 8977]). Satellites provide a real-life lab for testing collisional models. We will search for satellites around special objects at the request of lightcurve observers, and we will make a search for debris in the vicinity of Pluto, in support of the New Horizons mission. Our shape/size work requires observations over most of a full rotation period (typically several hours).

  5. Secc~ao de Algebra e Analise, Departamento de Matematica,

    E-print Network

    Nunes, João Pimentel

    de classe C1 e injectiva; a sua inversa g 1 e contnua e gH(x) = (1;1; p 2 cos( p 2x)) T= 0, para x P(;) = (cos ;sin ;log ), com P]1;2[; P ]=6;7=6[. g e injectiva, com inversa contnua, de classe C1 e a sua;[: A func~ao g e de classe C1 , tem inversa contnua e tem derivada injectiva (como se ira veri#12;car abaixo

  6. SIMS chemical and isotopic analysis of impact features from LDEF experiments AO187-1 and AO187-2

    NASA Technical Reports Server (NTRS)

    Stadermann, Frank J.; Amari, Sachiko; Foote, John; Swan, Pat; Walker, Robert M.; Zinner, Ernst

    1995-01-01

    Previous secondary ion mass spectrometry (SIMS) studies of extended impact features from LDEF capture cell experiment AO187-2 showed that it is possible to distinguish natural and man-made particle impacts based on the chemical composition of projectile residues. The same measurement technique has now been applied to specially prepared gold target impacts from experiment AO187-1 in order to identify the origins of projectiles that left deposits too thin to be analyzed by conventional energy-dispersive x-ray (EDX) spectroscopy. The results indicate that SIMS may be the method of choice for the analysis of impact deposits on a variety of sample surfaces. SIMS was also used to determine the isotopic compositions of impact residues from several natural projectiles. Within the precision of the measurements all analyzed residues show isotopically normal compositions.

  7. Aspect-Oriented Business Process Modeling with AO4BPMN

    NASA Astrophysics Data System (ADS)

    Charfi, Anis; Müller, Heiko; Mezini, Mira

    Many crosscutting concerns in business processes need to be addressed already at the business process modeling level such as compliance, auditing, billing, and separation of duties. However, existing business process modeling languages including OMG's Business Process Modeling Notation (BPMN) lack appropriate means for expressing such concerns in a modular way. In this paper, we motivate the need for aspect-oriented concepts in business process modeling languages and propose an aspect-oriented extension to BPMN called AO4BPMN. We also present a graphical editor supporting that extension.

  8. LDEF (Postflight), AO038 : Interstellar Gas Experiment, Tray F06

    NASA Technical Reports Server (NTRS)

    1990-01-01

    LDEF (Postflight), AO038 : Interstellar Gas Experiment, Tray F06 The postflight photograph was taken in the KSC SAEF II facility prior to removing experiments from the LDEF. The brown stains are still prominent and seem to be a little more intense than in the flight photograph. This may be due to the different lighting intensity and direction. The beryllium copper collector foil is clearly visible in this photograph as are the baffles near the top of the canister housing. However, the fine wire mesh grid cannot be seen. Due to an experiment system mal- function, the canister collector foil that is visible was exposed for the total mission.

  9. Stream-Field Interactions in the Magnetic Accretor AO Piscium

    NASA Astrophysics Data System (ADS)

    Hellier, Coel; van Zyl, Liza

    2005-06-01

    UV spectra of the magnetic accretor AO Psc show absorption features for half the binary orbit. The absorption is unlike the wind-formed features often seen in similar stars. Instead, we attribute it to a fraction of the stream that overflows the impact with the accretion disk. Rapid velocity variations can be explained by changes in the trajectory of the stream depending on the orientation of the white dwarf's magnetic field. Hence, we are directly observing the interaction of an accretion stream with a rotating field. We compare this behavior to that seen in other intermediate polars and in SW Sex stars.

  10. IDENTIFICAC ~AO PAPILOSC OPICA DE REC EM-NASCIDOS. Daniel Weingaertner1

    E-print Network

    Edward Richard Henry, por volta de 1890, que a identificac¸~ao atrav´es das impress~oes digitais passou atividades cotidianas como: abertura de portas, acesso a computa- dores, senha de cart~ao banc´ario, entre

  11. Teorema da Diverg^encia e Teorema de Stokes (Resoluc~ao Sumaria)

    E-print Network

    Ventura, Joana

    Teorema da Diverg^encia e Teorema de Stokes (Resolu¸c~ao Sum´aria) 19 de Maio de 2009 1. Calcule o de S, conclu´imos que g induz a orienta¸c~ao correspondente `a normal exterior unit´aria, e que unit´aria indicada corresponde ent~ao `a normal unit´aria exterior n ao volume V limitado por D1 SD2

  12. Engenharia de Sistemas e Informatica (ex -Eng. de Sistemas e Computac~ao)

    E-print Network

    Jesus, Sérgio M.

    de apoio foi inicialmente escrito para o Curso de Inform´atica de Sistemas, disciplina anual de disciplina de An´alise de Circuitos, do curso de Engenharia de Sistemas e Computa¸c~ao em 1994/95. Ao longo¸c~ao do curso de LESC para LESI foi de novo, e de acordo com o programa indicativo proposto em Senado

  13. O Algoritmo de Cayley-Dickson e Alguns Teoremas de Classificac~ao

    E-print Network

    Torres, Fernando

    oct^onions e almejando um projeto de ´algebras de dimens~ao 2n . Segundo [2], enquanto Graves se empenhava nesses estudos, Arthur Cayley publicou um trabalho que consagrou os oct^onions, a partir de ent-Dickson e uma delas, os oct^onions, n~ao ´e associativa, vamos utilizar essa defini¸c~ao menos restritiva

  14. d-AO spherical aromaticity in Ce6 O8.

    PubMed

    Yu, Xiaohu; Oganov, Artem R; Popov, Ivan A; Boldyrev, Alexander I

    2016-01-01

    After the first introduction of ? aromaticity in chemistry to explain the bonding, structure, and reactivity of benzene and its derivatives, this concept was further applied to many other compounds featuring other types of aromaticity (i.e., ?, ?). Thus far, there have been no reports on d-AO-based spherical ? aromaticity. Here, we predict a highly stable bare Ce6 O8 cluster of a spherical shape using evolutionary algorithm USPEX and DFT?+?U calculations. Natural bond orbital analysis, adaptive natural density partitioning algorithm, electron localization function, and partial charge plots demonstrate that bare Ce6 O8 cluster exhibits d-AO spherical ? aromaticity, thus explaining its exotic geometry and stability. Ce6 O8 complex plays an important role in many reactions and is known to exist in many forms, such as in NH4 [Ce6 (?(3) O)5 (?(3) OH)3 (?(2) -C6 H5 COO)9 (NO3 )3 (DMF)3 ]*DMF*H2 O compound, which is prepared under room temperature, and acts as an oxidizing agent. © 2015 Wiley Periodicals, Inc. PMID:26284694

  15. Esquema Hibrido para Amostragem de Mapas de Iluminac~ao em renderizac~oes foto-realistas

    E-print Network

    de Figueiredo, Luiz Henrique

    Esquema H´ibrido para Amostragem de Mapas de Iluminac¸~ao em renderizac¸~oes foto-realistas Aldo R¸~ao foto- realista com mapas de iluminac¸~ao provenientes de cenas reais. Desenvolvemos um sistema que¸~ao gr´afica. Atual- mente a renderizac¸~ao foto-realista de cenas sint´eticas com iluminac

  16. Nao/ao Variability In The Coupled Bergen Climate Model

    NASA Astrophysics Data System (ADS)

    Sorteberg, A.; Furevik, T.; Bentsen, M.; Drange, H.; Kvamsto, N. G.; Thorstensen-Kindem, I.

    A new fully coupled atmosphere-ocean-sea ice model, known as the Bergen Climate Model (BCM), has been developed. The coupled model can be run with stretched co- ordinates both in the atmosphere and ocean and consists of the atmospheric model ARPEGE/IFS, and a global version of the isopycnal ocean model MICOM, including a sea ice model. The atmospheric model ARPEGE/IFS (c22) is a spectral model devel- oped jointly by Meteo-France and the European Centre for Medium-Range Weather Forecasts (ECMWF). The ocean circulation model is the Miami Isopycnic Coordinate Ocean Model (MI- COM). Several modifications have been done to the MICOM model including the incorporation of a thermodynamic and dynamic sea ice model, the use of tempera- ture as a prognostic variable instead of salinity, and the use of a metric scale factor in both lateral, so the model can easily be configured on a general orthogonal grid. Also,the thickness diffusion has been modified to better handle diffusion near bottom topography and the base of the mixed layer. Coupling has been done with the library OASIS where 14 different fields are ex- changed using Montecarlo mapping and subgrid interpolation. Continental runoff into the correct rivers and discharge into the correct ocean grid cells are performed using the Total Runoff Integrating Pathways (TRIP) data set. Results will be present from a 300 years flux adjusted control integration of BCM with todays climate, using a unstretched T63 truncation in the atmosphere and a 0.8 by 2.4 degree resolution (near the equator gradually transforming to approximate square grid cells towards the poles) in the ocean. The model output has been analysed for large scale variability in both the ocean and atmosphere, with emphasise on the North Atlantic and Arctic climate. Statistical properties of the NAO/AO signal, and its im- pacts on the climate components, are identified and compared with observations. The NAO/AO mode of variability show up in the model with realistic amplitudes and fre- quencies in both 2m temperature and SLP and emphasis will be placed on evaluation of the models ability to reproduce known relations between different meteorological variables and the NAO/AO signal.

  17. LDEF (Postflight), AO038 : Interstellar Gas Experiment, Tray E12

    NASA Technical Reports Server (NTRS)

    1990-01-01

    LDEF (Postflight), AO038 : Interstellar Gas Experiment, Tray E12 The postflight photograph was taken in the KSC SAEF II facility prior to removing experiments from the LDEF. The brown stains are still very prominent but seem to be less vivid than in the flight photograph. This may be due to the different lighting intensity and direction. The openings in the base plate for the grid voltage cable connectors show clearly and are thought to be the source of the brown stains around the connector. The beryllium copper collector foils are clearly visible in this photograph as are the baffles near the top of the canister housing. However, the fine wire mesh grid cannot be seen. Due to an experiment system malfunction, the canister collector foils that are visible were exposed for the total mission.

  18. NFIRAOS: first facility AO system for the Thirty Meter Telescope

    NASA Astrophysics Data System (ADS)

    Herriot, Glen; Andersen, David; Atwood, Jenny; Boyer, Corinne; Byrnes, Peter; Caputa, Kris; Ellerbroek, Brent; Gilles, Luc; Hill, Alexis; Ljusic, Zoran; Pazder, John; Rosensteiner, Matthias; Smith, Malcolm; Spano, Paolo; Szeto, Kei; Véran, Jean-Pierre; Wevers, Ivan; Wang, Lianqi; Wooff, Robert

    2014-07-01

    NFIRAOS, the Thirty Meter Telescope's first adaptive optics system is an order 60x60 Multi-Conjugate AO system with two deformable mirrors. Although most observing will use 6 laser guide stars, it also has an NGS-only mode. Uniquely, NFIRAOS is cooled to -30 °C to reduce thermal background. NFIRAOS delivers a 2-arcminute beam to three client instruments, and relies on up to three IR WFSs in each instrument. We present recent work including: robust automated acquisition on these IR WFSs; trade-off studies for a common-size of deformable mirror; real-time computing architectures; simplified designs for high-order NGS-mode wavefront sensing; modest upgrade concepts for high-contrast imaging.

  19. The 1987 outburst of the BL Lacertid AO 0235 + 164

    NASA Astrophysics Data System (ADS)

    Webb, J. R.; Smith, A. G.

    1989-08-01

    The violently variable BL Lacertid AO 0235 + 164 displayed a 3.24 magnitude outburst in early 1987. This outburst was observed intensively from Rosemary Hill Observatory in three colors. Long term monitoring observations made at Rosemary Hill are examined in an effort to find any recurring timescales associated with this outburst and previous large amplitude outbursts. The energetics of the 1987 outburst are analyzed in terms of the Shields and Wheeler model of a magnetized accretion disk. The timescales identified in the power spectrum (2.8 and 1.6 yr) are input into the model as the storage timescales. Since the emitted energy calculated from the optical burst cannot be stored in a magnetized disk at an allowable radius, it is concluded that either the storage timescales are longer than those identified in the power spectrum, or relativistic beaming effects must be considered, with a Doppler factor of 1.3 to 1.6.

  20. HST and Keck AO Images of Vortices on Jupiter

    NASA Astrophysics Data System (ADS)

    de Pater, Imke; Wong, M.; Luszcz-Cook, S.; Adamkovics, M.; Marcus, P.; Asay-Davis, X.; Conrad, A.; Go, C.

    2009-09-01

    Observations of Jupiter were conducted in April 2006 and May 2008 with both HST (250-890 nm) and the 10-m Keck telescope. On Keck we used the near-infrared camera NIRC2, coupled to the AO system, at 1.2 to 5 micrometers. At 5 um we are sensitive to Jupiter's thermal emission in cloud-free regions of the atmosphere, while at 1.2 um we see reflected sunlight from hazes and clouds in the troposphere-stratosphere. All small ovals (i.e., all except for Oval BA and the GRS) appear to be surrounded by bright rings at 5 mu, with typical brightness temperatures of 225-250 K, and hence probing depths to 2.5-4 bar. We argue that the small vortices are columnar structures, extending down into the water cloud. Air is rising along the center of these vortices, and descending around the outer periphery; the storm systems are likely fueled by the latent heat released from the water cloud. The descending part of the vertical circulation in the larger ovals is within the ovals, likely at the location of the red ring in Oval BA, which may indicate the maximum radial distance where such return flows can take place. On 19 July 2009, amateur observer Anthony Wesley (Australia) reported a dark spot/streak on Jupiter, near a southern latitude of 56 deg, which he attributed to an impact (analogous to the SL9 impact on Jupiter). We are scheduled to observe Jupiter with the Keck AO system on 24 July 2009 UT; if observations are successful, we will report preliminary results.

  1. Sapienza Univ CF 8020993058

    E-print Network

    Di Pillo, Gianni

    Legali - ARAL -; VISTA la D.D. n. 3483 del 19.11.2012 con la quale a decorrere dal 01.12.2012 viene - ARAL -; VISTE altresì le DD.DD. con cui sono stati attribuiti al personale tecnico- amministrativo gli ai Settori dell'Area Affari Legali - ARAL - come d

  2. Fachhochschule Univ. West,

    E-print Network

    Ulm, Universität

    P P P P P P P P P P P P P P P P P P P P P P P H H H H H H H B 10 Fachhochschule Eselsberg, 3, 5, 14 45 47 45 40 5 7 O22 O23N22 N23 N24 N25 N26 O25 O26 O27 O28 M23 M24 M25 N27 Zahn- klinik Universität-Einstein-Allee M ähringer Weg J.-Franck-Ring Helmholtzstra�e Lehrer-Tal-Weg Universitätsklinikum Oberer Eselsberg

  3. The AO Ulnar Shortening Osteotomy System Indications and Surgical Technique

    PubMed Central

    Nagy, Ladislav; Jungwirth-Weinberger, Anna; Campbell, Douglas; Pino, Juan González del

    2014-01-01

    Ulnar shortening osteotomy is an established and frequently performed surgical procedure in wrist surgery. The technical aspects of the procedure have continued to develop in recent years, with instruments and implants being developed specifically for this purpose. Ulnar shortening osteotomy is required for different clinical indications and situations. These varying indications demand different amounts of shortening, but all must be precise and accurate. Controversy exists as to how this can best be achieved in terms of the location for osteotomy, the surgical approach and geometry of the osteotomy, as well as which implant to use to provide optimal stability. The goal of all techniques (besides successfully resolving the underlying problem) is to achieve reliable and rapid bone union without compromising early functional rehabilitation and also to avoid hardware complications. The AO Hand Expert Group has developed a specialized instrumentation system with dedicated and specifically designed implants to ensure exact and accurate cutting with precise and rigid stabilization of the ulna. The matched drill guides and double-blade saws allow accurate completion of the planned amount of shortening together with precise coaptation of the osteotomy fragments. The specific ulnar osteotomy LCP (locking compression plate) combines maximum stability with minimum bulk and soft tissue irritation. The features of the implant, its surgical technique, and early results are described. PMID:25077046

  4. LDEF (Prelaunch), AO038 : Interstellar Gas Experiment, Tray F06

    NASA Technical Reports Server (NTRS)

    1984-01-01

    LDEF (Prelaunch), AO038 : Interstellar Gas Experiment, Tray F06 The prelaunch photograph provides a view of the Interstellar Gas Experiment (IGE) hardware and shows a single experiment canister housing mounted in a twelve (12) inch deep peripheral tray. The experiment utilizes seven (7) canisters containing high-purity beryllium copper collecting foils, three (3) located in peripheral trays and four (4) located in trays on the space end of the LDEF, to meet experiment objectives. The active portion of the experiment consist of canister electronic timing devices and pyrotechnic cutters that control the exposure time of each collector foil. An electronic voltage multiplier system provides a bias voltage to the grid network located above the beryllium copper collecting foils.The batteries and the electronics are housed beneath the experiment baseplate facing the LDEF interior. The white painted surface area within the LDEF tray provides the optical properties required to maintain the experiment components within temperature limits. The rectangular opening in the upper right corner of the experiment baseplate provide the mounting for the ground support equipment test connector. The white grid voltage connector box, mounted on the side of the canister housing, provides the termination point for the cables running from the grid voltage box beneath the baseplate. The canister housing is a welded aluminum structure with aluminum mounting flanges. The experiment components are assembled using non-magnetic stainless steel fasteners. The aluminum housing cover, removed prior to flight, protects experiment components from damage and large particle contamination during ground handling.

  5. LDEF (Flight), AO038 : Interstellar Gas Experiment, Tray H09

    NASA Technical Reports Server (NTRS)

    1990-01-01

    LDEF (Flight), AO038 : Interstellar Gas Experiment, Tray H09 The flight photograph of the Interstellar Gas Experiment was taken from the Orbiter aft flight deck during the LDEF retrieval. A very light contamination stain is present on the experiment tray flanges and on the most of the visible LDEF structure. The exception being a darker stain on the structure adjacent to thermal covers that provide venting for the LDEF interior. Both paint dots appear to be heavily coated with the brown contamination stain. The color of the white thermal control paint on the IGE has changed and now varies from off-white to a dark brown. The darker brown areas on the experiment baseplate, around the grid voltage cable connectors, appear to have come from contaminants flowing from inside the LDEF. A dark stain area can be seen on the lower half of the tray's right sidewall but a shadow hides most of the dark stain in the upper left corner of the tray. A lighter stain coats portions of the experiment baseplate and the outside of the canister housing. A beryllium copper collector foil is clearly visible in the lower left canister housing as are the baffles and reflected light from the fine wire mesh grid near the top of the canister housing. Due to an experi- ment system malfunction, the canister collector foils that are visible were exposed for the total mission.

  6. LDEF (Postflight), AO038 : Interstellar Gas Experiment, Tray H09

    NASA Technical Reports Server (NTRS)

    1990-01-01

    LDEF (Postflight), AO038 : Interstellar Gas Experiment, Tray H09 The post landing Interstellar Gas Experiment photograph was taken from the Orbiter's cargo bay access hatch during post landing operations to prepare the Orbiter for the ferry flight from the Dryden Flight Research Center to the Kennedy Space Center. A very light contamination stain is present on the experiment tray flanges and on the most of the visible LDEF structure. The exception being the darker stain on the structure adjacent to thermal covers that provide venting for the LDEF interior. Both paint dots appear to be heavily coated with the brown contamination stain. The color of the white thermal control paint on the IGE has changed and now varies from off-white to a dark brown. The darker brown areas on the experiment baseplate, around the grid voltage cable connectors, appear to have come from contaminants flowing from inside the LDEF. A dark stain area can be seen on the lower half of the tray's left sidewall and in the lower left corner of the tray. A lighter stain coats portions of the experiment baseplate and the outside of the canister housing. A beryllium copper collector foil is clearly visible in the upper left canister housing as are the baffles and reflected light from the fine wire mesh grid near the top of the canister housing. Due to an experiment system malfunction, the canister collector foils that are visible were exposed for the total mission.

  7. LDEF (Flight), AO038 : Interstellar Gas Experiment, Tray H06

    NASA Technical Reports Server (NTRS)

    1990-01-01

    LDEF (Flight), AO038 : Interstellar Gas Experiment, Tray H06 The flight photograph was taken from the Orbiter aft flight deck during the LDEF retrieval. A very light contamination stain is present on the experiment tray flanges and on the most of the visible LDEF structure. The exception being a much darker stain on the structure adjacent to thermal covers that provide venting for the LDEF interior. The paint dot, originally white, adjacent to the thermal cover vent area is heavily coated with the brown contamination stain while the paint dot adjacent to the center end cover plate has a very light coating. The color of the white thermal control paint on the IGE has changed and now varies from offwhite to a dark brown. The darker brown areas on the experiment baseplate, around the grid voltage cable connectors, appear to have come from contaminants flowing from inside the LDEF. A dark stain area can be seen on the tray's lower sidewall but a shadow hides most of the dark stain in the upper left corner of the tray. A lighter stain coats portions of the experiment baseplate and the outside of the canister housing. A beryllium copper collector foil is clearly visible in the lower left canister housing as are the baffles and reflected light from the fine wire mesh grid near the top of the canister housing. Due to an experiment system malfunction, the canister collector foils that are visible were exposed for the total mission.

  8. Atomic oxygen effects on LDEF experiment AO171

    NASA Technical Reports Server (NTRS)

    Whitaker, Ann F.; Kamenetzky, Rachel R.; Finckenor, Miria M.; Norwood, Joseph K.

    1993-01-01

    The Solar Array Materials Passive Long Duration Exposure Facility (LDEF) Experiment (SAMPLE), AO171, contained in total approximately 100 materials and materials processes with a 300 specimen complement. With the exception of experiment solar cell and solar cell modules, all test specimens were weighed before flight, thus allowing an accurate determination of mass loss as a result of space exposure. Since almost all of the test specimens were thermal vacuum baked before flight, the mass loss sustained can be attributed principally to atomic oxygen attack. The atomic oxygen effects observed and measured in five classes of materials is documented. The atomic oxygen reactivity values generated for these materials are compared to those values derived for the same materials from exposures on short term shuttle flights. An assessment of the utility of predicting long term atomic oxygen effects from short term exposures is given. This experiment was located on Row 8 position A which allowed all experiment materials to be exposed to an atomic oxygen fluence of 6.93 x 10(exp 21) atoms/cm(sup 2) as a result of being positioned 38 degrees off the RAM direction.

  9. Ruled and holographic experiment (AO 138-5)

    NASA Astrophysics Data System (ADS)

    Bonnemason, Francis

    1993-04-01

    The AO 138-5 experiment was designed, via the FRECOPA (FRench COoperative PAyload) experiment with the aim to study the optical behavior of different diffraction gratings submitted to space vacuum long exposure and solar irradiation. Samples were ruled and holographic gratings, masters or replica, and some additional control mirrors with various coatings. The experiment was located on the B3, trailing edge of the LDEF and was protected against Atomic Oxygen flux. The experienced thermal cycling was evaluated from -23 C to 66 C during the flight, 34,000 orbits. The samples (two batches of four pieces) were located on a dedicated plate, by a pair of equivalent gratings or mirrors; optical faces were located on the external side. The plate was inside a canister, which had been opened in space for ten months. When the satellite returned to Kennedy Space Center, the remaining vacuum in the canister was still correct. The analysis focused on the triple point characterization including light efficiency, wavefront flatness quality and stray light level. Tests were conducted on control mirrors and gratings (rules and holographic master or replica) loaded but not exposed to cosmic dust or direct solar irradiations. They did not show any significant variations. Solar exposure had damaged the coating (aluminum and platinum) reflectivity in the Ultra-Violet region; the degradation is higher with the gratings, in terms of efficiency. However, wavefront flatness quality and stray light level tests revealed no additional changes.

  10. Col^onia de Formigas: Uma Abordagem Para Resoluc~ao De Problemas De Layout

    E-print Network

    Gomes, Francisco A. M.

    Col^onia de Formigas: Uma Abordagem Para Resolu¸c~ao De Problemas De Layout Daniele Costa Silva formigas e propomos seu uso para resolu¸c~ao de problemas de layout. Palavras-Chaves. Col^onia de Formigas. Problemas de Layout. M´etodos Heur´isticos. 1 Introdu¸c~ao O problema de layout ´e um problema antigo e ap

  11. Robo-AO KP: A new era in robotic adaptive optics

    NASA Astrophysics Data System (ADS)

    Riddle, Reed L.; Baranec, Christoph; Law, Nicholas M.; Kulkarni, Shrinivas R.; Duev, Dmitry; Ziegler, Carl; Jensen-Clem, Rebecca M.; Atkinson, Dani Eleanor; Tanner, Angelle M.; Zhang, Celia; Ray, Amy

    2016-01-01

    Robo-AO is the first and only fully automated adaptive optics laser guide star AO instrument. It was developed as an instrument for 1-3m robotic telescopes, in order to take advantage of their availability to pursue large survey programs and target of opportunity observations that aren't possible with other AO systems. Robo-AO is currently the most efficient AO system in existence, and it can achieve an observation rate of 20+ science targets per hour. In more than three years of operations at Palomar Observatory, it has been quite successful, producing technology that is being adapted by other AO systems and robotic telescope projects, as well as several high impact scientific publications. Now, Robo-AO has been selected to take over operation of the Kitt Peak National Observatory 2.1m telescope. This will give Robo-AO KP the opportunity to pursue multiple science programs consisting of several thousand targets each during the three years it will be on the telescope. One-sixth of the observing time will be allocated to the US community through the NOAO TAC process. This presentation will discuss the process adapting Robo-AO to the KPNO 2.1m telescope, the plans for integration and initial operations, and the science operations and programs to be pursued.

  12. Multi-conjugate AO for the European Solar Telescope

    NASA Astrophysics Data System (ADS)

    Montilla, I.; Béchet, C.; Le Louarn, M.; Tallon, M.; Sánchez-Capuchino, J.; Collados Vera, M.

    2012-07-01

    The European Solar Telescope (EST) will be a 4-meter diameter world-class facility, optimized for studies of the magnetic coupling between the deep photosphere and upper chromosphere. It will specialize in high spatial resolution observations and therefore it has been designed to incorporate an innovative built-in Multi-Conjugate Adaptive Optics system (MCAO). It combines a narrow field high order sensor that will provide the information to correct the ground layer and a wide field low order sensor for the high altitude mirrors used in the MCAO mode. One of the challenging particularities of solar AO is that it has to be able to correct the turbulence for a wide range of observing elevations, from zenith to almost horizon. Also, seeing is usually worse at day-time, and most science is done at visible wavelengths. Therefore, the system has to include a large number of high altitude deformable mirrors. In the case of the EST, an arrangement of 4 high altitude DMs is used. Controlling such a number of mirrors makes it necessary to use fast reconstruction algorithms to deal with such large amount of degrees of freedom. For this reason, we have studied the performance of the Fractal Iterative Method (FriM) and the Fourier Transform Reconstructor (FTR), to the EST MCAO case. Using OCTOPUS, the end-to-end simulator of the European Southern Observatory, we have performed several simulations with both algorithms, being able to reach the science requirement of a homogeneous Strehl higher that 50% all over the 1 arcmin field of view.

  13. LDEF (Prelaunch), AO038 : Interstellar Gas Experiment, Tray H09

    NASA Technical Reports Server (NTRS)

    1984-01-01

    LDEF (Prelaunch), AO038 : Interstellar Gas Experiment, Tray H09 The prelaunch photograph was taken in SAEF II at KSC prior to installation of the Interstellar Gas Experiment on the LDEF. The prelaunch photograph provides a view of the Interstellar Gas Experiment (IGE) hardware and shows the orientation of two (2) experiment canister housings mounted in a twelve (12) inch deep end tray. The experiment utilizes seven (7) canisters containing high-purity beryllium copper collecting foils, three (3) located in peripheral trays and four (4) located in trays on the space end of the LDEF, to meet experiment objectives. The active portion of the experiment consist of canister electronic timing devices and pyrotechnic cutters that control the exposure time of each collector foil. An electronic voltage multiplier system provides a bias voltage to the grid network located above the beryllium copper collecting foils.The batteries and the electronics are housed beneath the experiment baseplate facing the LDEF interior. The white painted surface area within the LDEF tray provides the optical properties required to maintain the experiment components within temperature limits. The two (2) rectangular openings in opposite corners of the experiment baseplate provide the mountings for the grid voltage box and for the ground support equipment test connectors. A white grid voltage box, mounted on the side of each canister housing, provides the termination point for the cables running from the power supply located beneath the baseplate. The canister housing is a welded aluminum structure with aluminum mounting flanges. The experiment components are assembled using non-magnetic stainless steel fasteners. The aluminum housing cover, removed prior to flight, protects experiment components from damage and large particle contamination during ground handling.

  14. LDEF (Postflight), AO038 : Interstellar Gas Experiment, Tray H06

    NASA Technical Reports Server (NTRS)

    1990-01-01

    LDEF (Postflight), AO038 : Interstellar Gas Experiment, Tray H06 The post landing photograph was taken from the Orbiter's cargo bay access hatch during post landing operations to prepare the Orbiter for the ferry flight from the Dryden Flight Research Center to the Kennedy Space Center. A very light contamination stain is present on the experiment tray flanges and on the most of the visible LDEF structure. The exception being a much darker stain on the structure adjacent to thermal covers that provide venting for the LDEF interior. The paint dot adjacent to the thermal cover vent area is heavily coated with the brown contamination stain while the paint dot adjacent to the center end cover plate has a very light coating. The color of the white thermal control paint on the IGE has changed and now varies from offwhite to a dark brown. The darker brown areas on the experiment baseplate, around the grid voltage cable connectors, appear to have come from contaminants flowing from inside the LDEF. A dark stain area can be seen on the tray's lower sidewall and in the upper left corner of the tray. A lighter stain coats portions of the experiment baseplate and the outside of the canister housing. A beryllium copper collector foil is clearly visible within the canister housings as are the baffles and reflected light from the fine wire mesh grid near the top of the canister housing. Due to an experi- ment system malfunction, the canister collector foils that are visible were exposed for the total mission.

  15. LDEF (Prelaunch), AO038 : Interstellar Gas Experiment, Tray E12

    NASA Technical Reports Server (NTRS)

    1984-01-01

    LDEF (Prelaunch), AO038 : Interstellar Gas Experiment, Tray E12 The prelaunch photograph provides a view of the Interstellar Gas Experiment (IGE) hardware and shows the orientation of two (2) experiment canister housings mounted in a twelve (12) inch deep peripheral tray. The experiment utilizes seven (7) canisters containing high-purity beryllium copper collecting foils, three (3) located in peripheral trays and four (4) located in trays on the space end of the LDEF, to meet experiment objectives. The active portion of the experiment consist of canister electronic timing devices and pyrotechnic cutters that control the exposure time of each collector foil. An electronic voltage multiplier system provides a bias voltage to the grid network located above the beryllium copper collecting foils.The batteries and the electronics are housed beneath the experiment baseplate facing the LDEF interior. The white painted surface area within the LDEF tray provides the optical properties required to maintain the experiment components within temperature limits. The two (2) rectangular openings in opposite corners of the experiment baseplate provide the mountings for the ground support equipment test connectors. A white grid voltage connector box, mounted on the side of each canister housing, provides the termination point for the cables running from the grid voltage box beneath the baseplate. The canister housing is a welded aluminum structure with aluminum mounting flanges. The experiment components are assembled using non-magnetic stainless steel fasteners. The aluminum housing cover, removed prior to flight, protects experiment components from damage and large particle contamination during ground handling.

  16. LDEF (Prelaunch), AO038 : Interstellar Gas Experiment, Tray H06

    NASA Technical Reports Server (NTRS)

    1984-01-01

    LDEF (Prelaunch), AO038 : Interstellar Gas Experiment, Tray H06 The prelaunch photograph was taken in SAEF II at KSC prior to installation of the Interstellar Gas Experiment on the LDEF. The prelaunch photograph provides a view of the Interstellar Gas Experiment (IGE) hardware and shows the orientation of two (2) experiment canister housings mounted in a twelve (12) inch deep end tray. The experiment utilizes seven (7) canisters containing high-purity beryllium copper collecting foils, three (3) located in peripheral trays and four (4) located in trays on the space end of the LDEF, to meet experiment objectives. The active portion of the experiment consist of canister electronic timing devices and pyrotechnic cutters that control the exposure time of each collector foil. An electronic voltage multiplier system provides a bias voltage to a wire mesh grid located above the beryllium copper collecting foils.The batteries and the electronics are housed beneath the experiment baseplate facing the LDEF interior. The white painted surface area within the LDEF tray provides the optical properties required to maintain the experiment components within temperature limits. The two (2) rectangular openings in opposite corners of the experiment baseplate provide the mountings for the grid voltage box and for the ground support equipment test connectors. A white grid voltage box, mounted on the side of each canister housing, provides the termination point for the cables running from the power supply located beneath the baseplate. The canister housing is a welded aluminum structure with aluminum mounting flanges. The experiment components are assembled using non-magnetic stainless steel fasteners. The aluminum housing cover, removed prior to flight, protects experiment components from damage and large particle contamination during ground handling.

  17. SCExAO: Combining high speed, high sensitivity wavefront control and low inner working angle

    E-print Network

    Guyon, Olivier

    Earth-sized planets with ELTs M-type stars G-type stars K-type stars F-type stars Angular separation) Broadband diffraction limited internal cal. Source + phase turbulence simulator #12;SCExAO visible bench SCExAO near-IR bench #12;Facility Adaptive Optics system Sharpens image High speed pyramid wavefront

  18. Patterns of Impairments in AOS and Mechanisms of Interaction between Phonological and Phonetic Encoding

    ERIC Educational Resources Information Center

    Laganaro, Marina

    2012-01-01

    Purpose: One reason why the diagnosis of apraxia of speech (AOS) and its underlying impairment are often debated may lie in the fact that most patients do not display pure patterns of AOS. Mixed patterns are clearly acknowledged at other levels of impairment (e.g., lexical-semantic and lexical-phonological), and they have contributed to debate…

  19. SCExAO as a precursor to an ELT exoplanet direct imaging instrument

    NASA Astrophysics Data System (ADS)

    Jovanovic, Nemanja; Guyon, Olivier; Martinache, Frantz; Clergeon, Christophe; Singh, Garima; Vievard, Sebastien; Kudo, Tomoyuki; Garrel, Vincent; Norris, Barnaby; Tuthill, Peter; Stewart, Paul; Huby, Elsa; Perrin, Guy; Lacour, Sylvestre

    2013-12-01

    The Subaru Coronagraphic Extreme AO (SCExAO) instrument consists of a high performance Phase Induced Amplitude Apodisation (PIAA) coronagraph combined with an extreme Adaptive Optics (AO) system operating in the near-infrared (H band). The extreme AO system driven by the 2000 element deformable mirror will allow for Strehl ratios>90% to be achieved in the H-band when it goes closed loop. This makes the SCExAO instrument a powerful platform for high contrast imaging down to angular separations of the order of 1 lambda/D and an ideal testbed for exploring coronagraphic techniques for ELTs. In this paper we report on the recent progress in regards to the development of the instrument, which includes the addition of a visible bench that makes use of the light at shorter wavelengths not currently utilized by SCExAO and closing the loop on the tip/tilt wavefront sensor. We will also discuss several exciting guest instruments which will expand the capabilities of SCExAO over the next few years; namely CHARIS which is a integral field spectrograph as well as VAMPIRES, a visible aperture masking experiment based on polarimetric analysis of circumstellar disks. In addition we will elucidate the unique role extreme AO systems will play in enabling high precision radial velocity spectroscopy for the detection of small companions.

  20. MagAO: Status and on-sky performance of the Magellan adaptive optics system

    NASA Astrophysics Data System (ADS)

    Morzinski, Katie M.; Close, Laird M.; Males, Jared R.; Kopon, Derek; Hinz, Phil M.; Esposito, Simone; Riccardi, Armando; Puglisi, Alfio; Pinna, Enrico; Briguglio, Runa; Xompero, Marco; Quirós-Pacheco, Fernando; Bailey, Vanessa; Follette, Katherine B.; Rodigas, T. J.; Wu, Ya-Lin; Arcidiacono, Carmelo; Argomedo, Javier; Busoni, Lorenzo; Hare, Tyson; Uomoto, Alan; Weinberger, Alycia

    2014-07-01

    MagAO is the new adaptive optics system with visible-light and infrared science cameras, located on the 6.5-m Magellan "Clay" telescope at Las Campanas Observatory, Chile. The instrument locks on natural guide stars (NGS) from 0th to 16th R-band magnitude, measures turbulence with a modulating pyramid wavefront sensor binnable from 28×28 to 7×7 subapertures, and uses a 585-actuator adaptive secondary mirror (ASM) to provide at wavefronts to the two science cameras. MagAO is a mutated clone of the similar AO systems at the Large Binocular Telescope (LBT) at Mt. Graham, Arizona. The high-level AO loop controls up to 378 modes and operates at frame rates up to 1000 Hz. The instrument has two science cameras: VisAO operating from 0.5-1?m and Clio2 operating from 1-5 ?m. MagAO was installed in 2012 and successfully completed two commissioning runs in 2012-2013. In April 2014 we had our first science run that was open to the general Magellan community. Observers from Arizona, Carnegie, Australia, Harvard, MIT, Michigan, and Chile took observations in collaboration with the MagAO instrument team. Here we describe the MagAO instrument, describe our on-sky performance, and report our status as of summer 2014.

  1. Optimizac~ao e Algoritmos (2004/2005) Instituto Superior Tecnico Engenharia Electrotecnica e de Computadores

    E-print Network

    Instituto de Sistemas e Robotica

    resolver (1) aproximadamente. Ou seja, basta localizar um ponto "aceit´avel". O algoritmo para localiza¸c~ao de pontos aceit´aveis (introduzido na s´erie de problemas anterior) est´a reproduzido na tabela 2. 1¸c~ao de um ponto aceit´avel Coment´arios: · Iremos usar sempre a regra de Wolfe A = { t > 0 : (t) (0

  2. Feedforward and feedback control in apraxia of speech (AOS): Effects of noise masking on vowel production

    PubMed Central

    Maas, Edwin; Mailend, Marja-Liisa; Guenther, Frank H.

    2015-01-01

    Purpose This study was designed to test two hypotheses about apraxia of speech (AOS) derived from the DIVA model (Guenther et al., 2006): (1) the Feedforward System Deficit Hypothesis and (2) the Feedback System Deficit Hypothesis. Method We used noise masking to minimize auditory feedback during speech. Six speakers with AOS and aphasia, four with aphasia without AOS, and two unimpaired speaker groups (younger and older adults) participated. Acoustic measures of vowel contrast, variability, and duration were analyzed. Results Younger, but not older unimpaired speakers showed significantly reduced vowel contrast with noise masking. Relative to older controls, the AOS group showed longer vowel durations, and a greater reduction in vowel contrast under masking conditions. There were no significant differences in variability. Three of the six speakers with AOS demonstrated the group pattern. Speakers with aphasia without AOS did not differ from controls in contrast, duration, or variability. Conclusion The greater reduction in vowel contrast with masking noise for the AOS group is consistent with the Feedforward System Deficit Hypothesis but not with the Feedback System Deficit Hypothesis; however, effects were small and not present in all individual speakers with AOS. Theoretical implications and alternative interpretations of these findings are discussed. PMID:25565143

  3. ARTIGO INTERNET Programa da troika "tem de ir evoluindo ao longo do tempo", diz Fernando

    E-print Network

    Instituto de Sistemas e Robotica

    ARTIGO INTERNET Programa da troika "tem de ir evoluindo ao longo do tempo", diz Fernando Ulrich ir evoluindo ao longo do tempo", diz Fernando Ulrich O presidente do BPI, Fernando Ulrich, considerou tempo" e que os justos não podem pagar pelos pecadores a nível de cortes. Falando à margem da

  4. Robo-AO: Initial results from the first autonomous laser guide star adaptive optics instrument

    NASA Astrophysics Data System (ADS)

    Riddle, R. L.; Baranec, C.; Law, N. M.; Ramaprakash, A. N.; Tendulkar, S.; Hogstrom, K.; Bui, K.; Burse, M.; Chordia, P.; Das, H.; Dekany, R.; Kulkarni, S.; Punnadi, S.; Smith, R.

    2014-12-01

    Large surveys are discovering thousands of objects which require further characterization at high angular resolution. The demands on space-based observatories and large telescopes with AO systems leave them generally unavailable for large high angular resolution surveys. To address this gap, we have developed Robo-AO, the first robotic laser AO system, as an economical and efficient imaging instrument for 1-3 m class telescopes. Observations of over 200 stellar objects per night have routinely been performed, with target-to-target observation overheads of less than 1.5 minutes. Scientific programs of several thousands of targets can be executed in mere weeks, and Robo-AO has already completed the three largest AO surveys to date.

  5. Bringing the Visible Universe into Focus with Robo-AO

    PubMed Central

    Baranec, Christoph; Riddle, Reed; Law, Nicholas M.; Ramaprakash, A.N.; Tendulkar, Shriharsh P.; Bui, Khanh; Burse, Mahesh P.; Chordia, Pravin; Das, Hillol K.; Davis, Jack T.C.; Dekany, Richard G.; Kasliwal, Mansi M.; Kulkarni, Shrinivas R.; Morton, Timothy D.; Ofek, Eran O.; Punnadi, Sujit

    2013-01-01

    The angular resolution of ground-based optical telescopes is limited by the degrading effects of the turbulent atmosphere. In the absence of an atmosphere, the angular resolution of a typical telescope is limited only by diffraction, i.e., the wavelength of interest, ?, divided by the size of its primary mirror's aperture, D. For example, the Hubble Space Telescope (HST), with a 2.4-m primary mirror, has an angular resolution at visible wavelengths of ~0.04 arc seconds. The atmosphere is composed of air at slightly different temperatures, and therefore different indices of refraction, constantly mixing. Light waves are bent as they pass through the inhomogeneous atmosphere. When a telescope on the ground focuses these light waves, instantaneous images appear fragmented, changing as a function of time. As a result, long-exposure images acquired using ground-based telescopes - even telescopes with four times the diameter of HST - appear blurry and have an angular resolution of roughly 0.5 to 1.5 arc seconds at best. Astronomical adaptive-optics systems compensate for the effects of atmospheric turbulence. First, the shape of the incoming non-planar wave is determined using measurements of a nearby bright star by a wavefront sensor. Next, an element in the optical system, such as a deformable mirror, is commanded to correct the shape of the incoming light wave. Additional corrections are made at a rate sufficient to keep up with the dynamically changing atmosphere through which the telescope looks, ultimately producing diffraction-limited images. The fidelity of the wavefront sensor measurement is based upon how well the incoming light is spatially and temporally sampled1. Finer sampling requires brighter reference objects. While the brightest stars can serve as reference objects for imaging targets from several to tens of arc seconds away in the best conditions, most interesting astronomical targets do not have sufficiently bright stars nearby. One solution is to focus a high-power laser beam in the direction of the astronomical target to create an artificial reference of known shape, also known as a 'laser guide star'. The Robo-AO laser adaptive optics system2,3 employs a 10-W ultraviolet laser focused at a distance of 10 km to generate a laser guide star. Wavefront sensor measurements of the laser guide star drive the adaptive optics correction resulting in diffraction-limited images that have an angular resolution of ~0.1 arc seconds on a 1.5-m telescope. PMID:23426078

  6. Bringing the visible universe into focus with Robo-AO.

    PubMed

    Baranec, Christoph; Riddle, Reed; Law, Nicholas M; Ramaprakash, A N; Tendulkar, Shriharsh P; Bui, Khanh; Burse, Mahesh P; Chordia, Pravin; Das, Hillol K; Davis, Jack T C; Dekany, Richard G; Kasliwal, Mansi M; Kulkarni, Shrinivas R; Morton, Timothy D; Ofek, Eran O; Punnadi, Sujit

    2013-01-01

    The angular resolution of ground-based optical telescopes is limited by the degrading effects of the turbulent atmosphere. In the absence of an atmosphere, the angular resolution of a typical telescope is limited only by diffraction, i.e., the wavelength of interest, ?, divided by the size of its primary mirror's aperture, D. For example, the Hubble Space Telescope (HST), with a 2.4-m primary mirror, has an angular resolution at visible wavelengths of ~0.04 arc seconds. The atmosphere is composed of air at slightly different temperatures, and therefore different indices of refraction, constantly mixing. Light waves are bent as they pass through the inhomogeneous atmosphere. When a telescope on the ground focuses these light waves, instantaneous images appear fragmented, changing as a function of time. As a result, long-exposure images acquired using ground-based telescopes--even telescopes with four times the diameter of HST--appear blurry and have an angular resolution of roughly 0.5 to 1.5 arc seconds at best. Astronomical adaptive-optics systems compensate for the effects of atmospheric turbulence. First, the shape of the incoming non-planar wave is determined using measurements of a nearby bright star by a wavefront sensor. Next, an element in the optical system, such as a deformable mirror, is commanded to correct the shape of the incoming light wave. Additional corrections are made at a rate sufficient to keep up with the dynamically changing atmosphere through which the telescope looks, ultimately producing diffraction-limited images. The fidelity of the wavefront sensor measurement is based upon how well the incoming light is spatially and temporally sampled. Finer sampling requires brighter reference objects. While the brightest stars can serve as reference objects for imaging targets from several to tens of arc seconds away in the best conditions, most interesting astronomical targets do not have sufficiently bright stars nearby. One solution is to focus a high-power laser beam in the direction of the astronomical target to create an artificial reference of known shape, also known as a 'laser guide star'. The Robo-AO laser adaptive optics system, employs a 10-W ultraviolet laser focused at a distance of 10 km to generate a laser guide star. Wavefront sensor measurements of the laser guide star drive the adaptive optics correction resulting in diffraction-limited images that have an angular resolution of ~0.1 arc seconds on a 1.5-m telescope. PMID:23426078

  7. LDEF (Prelaunch), AO201 : Interplanetary Dust Experiment, Tray B12

    NASA Technical Reports Server (NTRS)

    1984-01-01

    LDEF (Prelaunch), AO201 : Interplanetary Dust Experiment, Tray B12 The prelaunch photograph shows the six (6) inch deep Interplanetary Dust Experiment (IDE) master control tray. The tray has three (3) mounting/cover plates elevated on fiberglass stand-offs to provide clearance and protection for hardware and electronics located underneath. The stand-offs also raise the plates to a level that minimizes shading of detectors by the tray sidewalls. The mounting plate located at the left hand end of the tray is populated with eighty (80) metaloxide-silicon (MOS) capacitor-type impact sensors and one (1) solar sensor that is located approximately in the center of the mounting plate. The IDE sensors are two (2) inch diameter MOS capacitor structures approximately 250 um thick. The detectors are formed by growing either 0.4um or 1.0um thick silicon oxide, SiO2, layer on the 250um thick, B-doped polished silicon wafer. The top metal contact, the visible surface, was formed by vapor deposition of 1000A of aluminum on the SiO2 surface. Aluminum was also vapor deposited on the backside to form the contact with the silicon substrate. Gold wires are bonded to the front and back aluminum layers for use in connecting the detectors to the circuits. The complete wafers, IDE detectors, are mounted on chromic anodized aluminum frames by bonding the detector backside to the aluminum frame with a space qualified RTV silicon adhesive, de-volatized RTV-511. The difference in colors of the detectors is caused by reflections in the metallized surfaces. A reflection of one of the technicians is visible in the three (3) rows of detector on the left hand side of the mounting plate. The solar sensor, located at the mounting plate center, consist of four (4) silicon solar cells connected in series and associated circuity bonded to an aluminum baseplate. The solar sensor registered each orbital sunrise independant of LDEF orientation at the time of sunrise. When IDE solar sensor data from the six (6) orthogonal faces of the LDEF was correlated, the Interplanetary Dust Experiment clock could be precisely calibrated. The center 1/3rd tray cover is a chromic anodized aluminum plate that protects the IDE data conditioning and control electronics mounted underneath. The cover plate also serves as a mounting platform for ten (10) individual specimen holders provided by one of the IDE investigators.The material specimen, consisting of germanium, sapphire and zinc sulfide of different sizes, shapes and colors, are bonded to the specimen holders with an RTV adhesive. The specimen holders are attached to the cover plate with stainless steel non-magnetic fasteners. The 1/3rd tray cover plate in the right hand end of the experiment tray is an aluminum plate painted white with Chemglaze II A-276 paint and used as a thermal cover for the Experiment Power and Data System (EPDS). The EPDS is a system provided by the LDEF Project Office that processes and stores, on magnetic tape, the orbital experiment and housekeeping data from six (6) experiment locations on the LDEF.

  8. CLASSICAL AREAS OF PHENOMENOLOGY: Correcting dynamic residual aberrations of conformal optical systems using AO technology

    NASA Astrophysics Data System (ADS)

    Li, Yan; Li, Lin; Huang, Yi-Fan; Du, Bao-Lin

    2009-07-01

    This paper analyses the dynamic residual aberrations of a conformal optical system and introduces adaptive optics (AO) correction technology to this system. The image sharpening AO system is chosen as the correction scheme. Communication between MATLAB and Code V is established via ActiveX technique in computer simulation. The SPGD algorithm is operated at seven zoom positions to calculate the optimized surface shape of the deformable mirror. After comparison of performance of the corrected system with the baseline system, AO technology is proved to be a good way of correcting the dynamic residual aberration in conformal optical design.

  9. On-sky speckle nulling demonstration at small angular separation with SCExAO

    E-print Network

    Martinache, Frantz; Jovanovic, Nemanja; Clergeon, Christophe; Singh, Garima; Kudo, Tomoyuki; Currie, Thayne; Thalmann, Christian; McElwain, Michael; Tamura, Motohide

    2014-01-01

    This paper presents the first on-sky demonstration of speckle nulling, which was achieved at the Subaru Telescope in the context of the Subaru Coronagraphic Extreme Adaptive Optics (SCExAO) Project. Despite the absence of a high-order high-bandwidth closed-loop AO system, observations conducted with SCExAO show that even in poor-to-moderate observing conditions, speckle nulling can be used to suppress static and slow speckles even in the presence of a brighter dynamic speckle halo, suggesting that more advanced high-contrast imaging algorithms developed in the laboratory can be applied to ground-based systems.

  10. CATS: CfAO Treasury Survey of distant galaxies, supernovae, and AGN's

    E-print Network

    David C. Koo; Jason Melbourne; Claire Max; Anne Metevier; Mark Ammons; James E. Larkin; Matthew Barczys; Shelley A. Wright; Eric Steinbring

    2007-03-16

    The NSF Science and Technology Center for Adaptive Optics (CfAO) is supporting a major scientific legacy project called the CfAO Treasury Survey (CATS). CATS is obtaining near-infrared AO data in deep HST survey fields, such as GEMS, GOODS-N, & EGS. Besides summarizing the main objectives of CATS, we highlight some recent imaging work on the study of distant field galaxies, AGNs, and a redshift z = 1.32 supernova. CATS plans the first data release to the community in early 2007 (check http://www.astro.ucla.edu/~irlab/cats/index.shtml for more details on CATS and latest updates).

  11. AO12: To m-infinity and beyond... Candidate number: 51265 Supervisor: Dr D. Peters

    E-print Network

    Oxford, University of

    AO12: To m-infinity and beyond... Candidate number: 51265 Supervisor: Dr D. Peters Word count: 5700 an absorption band of the material [6]. A team in the Earth Observation Data Group of Oxford University

  12. Saldo Capitalizavel e Saldo N~ao Capitalizavel: Novos Algoritmos para o Regime de Juros Simples

    E-print Network

    Forger, Frank Michael

    investidor que se compromete a investir um determinado capital C durante um determinado tempo, este expresso (Capitaliza¸c~ao Simples ou Linear): Em cada per´iodo T, o investidor recebe juros sobre o capital investido

  13. XII Escola de Modelos de Regress~ao, Fortaleza-CE, 13-16 Marco 2011 Atribuic ~ao de Trafego em Redes de Filas Finitas Dependentes do Estado

    E-print Network

    Cruz, Frederico

    modelos s~ao normalmente consideradas, o modelo do ´otimo do sistema (do ingl^es System Optimum (SO) Model) e o modelo do equil´ibrio do usu´ario (do ingl^es User Equilibrium (UE) Model). O modelo SO pode ser

  14. MAC-212 --Laboratorio de Computac~ao Exercicio Programa 2: A Aventura Continua!

    E-print Network

    Reverbel, Francisco

    junho 1 Introdu¸c~ao Nosso objetivo agora ´e melhorar o sistema de execu¸c~ao de jogos tipo adventure estado do jogo seja salvo num arquivo; · fazer o jogo rodar num ambiente de janelas; · permitir m´ultiplos jogadores interagindo uns com os outros via rede (jogo multiusu´ario). Neste exerc´icio programa voc^e deve

  15. Clarissa Coda dos Santos Cavalcanti Marques Animac~ao 3D em Tempo Real com Analises

    E-print Network

    Lewiner, Thomas (Thomas Lewiner)

    Clarissa Cod´a dos Santos Cavalcanti Marques Anima¸c~ao 3D em Tempo Real com An´alises Harm^onicas Cod´a dos Santos Cavalcanti Marques Anima¸c~ao 3D em Tempo Real com An´alises Harm^onicas e Modal Tese Real com An´alises Harm^onicas e Modal / Clarissa Cod´a dos Santos Cavalcanti Marques; orientador

  16. Journees Activites Universitaires de Mecanique La Rochelle, 31 ao^ut et 1er septembre 2006

    E-print Network

    Bergmann, Michel

    Journ´ees Activit´es Universitaires de M´ecanique La Rochelle, 31 ao^ut et 1er septembre 2006 Contr [1] afin d'extraire les Structures Coh´erentes, permet d'´evaluer une base, optimale au sens de l M´ecanique La Rochelle, 31 ao^ut et 1er septembre 2006 1.2 Configuration de l'´etude Dans cette

  17. Status update and closed-loop performance of the Magellan adaptive optics VisAO camera

    NASA Astrophysics Data System (ADS)

    Kopon, Derek; Close, Laird M.; Males, Jared; Gasho, Victor; Morzinski, Katie; Follette, Katherine

    2012-07-01

    We present laboratory results of the closed-loop performance of the Magellan Adaptive Optics (AO) Adaptive Secondary Mirror (ASM), pyramid wavefront sensor (PWFS), and VisAO visible adaptive optics camera. The Magellan AO system is a 585-actuator low-emissivity high-throughput system scheduled for first light on the 6.5 meter Magellan Clay telescope in November 2012. Using a dichroic beamsplitter near the telescope focal plane, the AO system will be able to simultaneously perform visible (500-1000 nm) AO science with our VisAO camera and either 10 ?m or 3-5 ?m science using either the BLINC/MIRAC4 or CLIO cameras, respectively. The ASM, PWS, and VisAO camera have undergone final system tests in the solar test tower at the Arcetri Institute in Florence, Italy, reaching Strehls of 37% in i'-band with 400 modes and simulated turbulence of 14 cm ro at v-band. We present images and test results of the assembled VisAO system, which includes our prototype advanced Atmospheric Dispersion Corrector (ADC), prototype calcite Wollaston prisms for SDI imaging, and a suite of beamsplitters, filters, and other optics. Our advanced ADC performs in the lab as designed and is a 58% improvement over conventional ADC designs. We also present images and results of our unique Calibration Return Optic (CRO) test system and the ASM, which has successfully run in closedloop at 1kHz. The CRO test is a retro reflecting optical test that allows us to test the ASM off-sky in close-loop using an artificial star formed by a fiber source.

  18. Resoluc~ao Sumaria da 1a Ficha de Exercicios de AMIII

    E-print Network

    Ventura, Joana

    exemplo de uma fun¸c~ao f : R R bijectiva e de classe C1 cuja inversa n~ao seja de classe C1. Resolu(x, xy) (com f : E2 R de classe C2). Exprima a derivada parcial mista F12 `a custa de derivadas parciais : E2 R de classe C2). Exprima as derivadas parciais de ordens 1 e 2 de F `a custa de derivadas

  19. Decolorization of the AO24 azo dye and reduction of toxicity and genotoxicity in trickling biofilters.

    PubMed

    Garzóón-Zúñga, Marco A; Sandoval-Villasana, Ana M; Moeller-Chávez, Gabriela E

    2011-02-01

    Acid Orange 24 (AO24) dye was degraded in a trickling biofilter packed with peat and wood chips and inoculated with biomass from a petrochemical industry wastewater system. Different operating strategies were tested; in the first stage, two biofilters were operated independently--one non-aerated biofilter (passive) and the other with aeration-subsequently, the systems were operated serially, and effluent from the non-aerated biofilter was fed to the biofilter with aeration. This treatment train was used to test three different filtration velocities--0.141, 0.282, and 0.423 m/d. The results show that, when operating the systems with a dye charge of 0.035 kg AO24 m2/d and treating the effluent in a single step, good removal efficiencies of AO24 (95 and 89%), COD (63 and 53%), and acute toxicity (63 and 78%) were obtained in both biofilters (with and without air), although mutagenic and potentially carcinogenic intermediary compounds were not removed, because genotoxicity exhibits values higher than 2.0 units for the mutation rate. When using the non-aerated biofilter/aerated biofilter treatment train, it is possible to treat a dye charge 3 times greater (0.106 kg AO24 m2/d) and efficiently remove 98% AO24, 76% COD, 100% acute toxicity, and 100% genotoxicity, which indicates that, with this biological system, an advanced degree of biotransformation and mineralization of the azo dye AO24 is achieved. PMID:21449472

  20. Robo-AO: Initial results from the first autonomous laser guide star adaptive optics instrument

    NASA Astrophysics Data System (ADS)

    Riddle, R.; Baranec, C.; Law, N. M.; Ramaprakash, A. N.; Tendulkar, S.; Hogstrom, K.; Bui, K.; Burse, M.; Chordia, P.; Das, H.; Dekany, R.; Kulkarni, S.; Punnadi, S.; Smith, R.

    2014-03-01

    Large surveys, such as the Kepler mission and Palomar Transient Factory, are discovering upwards of thousands of objects which require further characterization at angular resolutions significantly finer than normally allowed by atmospheric seeing. The demands on precious space-based observatories (i.e. Hubble Space Telescope) and large telescopes with adaptive optics (AO) systems (i.e. Keck, VLT, Gemini) leave them generally unavailable for high angular resolution surveys of more than a few hundred targets at a time. To address the gap between scientific objects and available telescopes, we have developed Robo-AO, the first robotic laser AO system, as an economical and efficient imaging instrument for the more readily available 1-3 m class telescopes. The Robo-AO system system demonstrates angular resolutions approaching the visible diffraction limit of the Palomar 60-inch telescope. Observations of over 200 stellar objects per night have routinely been performed, with target-to-target observation overheads of less than 1.5 minutes. Scientific programs requiring high-resolution follow-up characterization of several thousands of targets can thus be executed in mere weeks, and Robo-AO has already completed the three largest AO surveys to date.

  1. CCM0128 --Computac~ao II Curso de Ci^encias Moleculares --Turma 22 --Primeiro Semestre de 2013

    E-print Network

    Reverbel, Francisco

    ~oes sobre listas encadeadas, use esta defini¸c~ao de Celula: typedef struct cel { int conteudo; /* campo de conte´udo */ struct cel *prox; /* ponteiro para a pr´oxima c´elula */ } Celula; 8. Nesta prova voc fun¸c~ao recursiva com o seguinte prot´otipo: Celula *anterior_maximo(Celula *p); Essa fun¸c~ao recebe

  2. Te Ao Kori as Expressive Movement in Aotearoa New Zealand Physical Education Teacher Education (PETE): A Narrative Account

    ERIC Educational Resources Information Center

    Legge, Maureen

    2011-01-01

    A unique aspect of Aotearoa/New Zealand physical education is the inclusion of Maori culture in the form of te ao kori. Te ao kori translates to mean the world of movement and is represented by the interpretation of indigenous movement, games and pastimes. Participation in te ao kori means the sports-based normative frame of reference for physical…

  3. PHOTOMETRIC PROPERTIES FOR SELECTED ALGOL-TYPE BINARIES. II. AO SERPENTIS AND V338 HERCULIS

    SciTech Connect

    Yang, Y.-G.; Dai, H.-F.; Hu, S.-M.; Guo, D.-F.; Wei, J.-Y.

    2010-04-15

    We present the first multiband photometry for the semidetached eclipsing binary AO Serpentis, observed on seven nights between 2009 April and July at the Weihai Observatory of Shandong University. By using the 2003 version of the Wilson-Devinney code, the photometric solutions of AO Ser and a similar object V338 Her were (re)deduced. The spectral types and orbital periods are A2 and P = 0.8793 days for AO Ser, F1V and P = 1.3057 days for V338 Her. The results reveal that two binaries are low mass ratio systems, whose secondary components fill their Roche lobes. The fill-out factors of the primary components are f = 58.6% for AO Ser and f = 54.2% for V338 Her, respectively. From the O - C curves of AO Ser and V338 Her, it is discovered that secular period changes with cyclic variations exist. The periods and semiamplitudes are 17.32({+-}0.01) yr and 0.0051({+-}0.0001) days for AO Ser, 29.07({+-}0.04) yr and 0.0116({+-}0.0015) days for V338 Her, respectively. This kind of cyclic oscillation may be attributed to either the light-time effect via an assumed third body or perhaps cyclic magnetic activity on the secondary component. For AO Ser, the long-term period decreases at a rate of dP/dt = -5.35({+-}0.03) x 10{sup -7} days yr{sup -1}, which may be caused by mass and angular momentum loss from the system. Considering the period decreasing, the fill-out factor of the primary for AO Ser will increase and it will finally fill its Roche lobe. Meanwhile, the secular period increase rate for V338 Her is dP/dt = +1.44({+-}0.24) x 10{sup -7} days yr{sup -1}, indicating that mass transfers from the less massive component to the more massive component. This will also cause the fill-out factor of the primary to increase. When the primaries fill their Roche lobes, AO Ser and V338 Her may evolve into contact stars, as predicted by the theory of thermal relaxation oscillations.

  4. 1. Espacos de Baire Definic~ao e Proposic~ao 1.1. Um espaco topologico X e um espaco de Baire sse

    E-print Network

    Santos, João

    . Mostremos que U An = . U A1 = logo, como X ´e regular existe uma bola B1 tal que ¯B1 U A1. Podemos escolher B1 tal que diam B1 tal que ¯B2 B1 A2 e diam B2 aberto A X tal que o conjunto {f(x) : x A, I} ´e limitado. Demonstra¸c~ao. Fixemos um ponto y Y

  5. Hand test AGG and AOS variables: relation with teacher rating of aggressiveness.

    PubMed

    Clemence, A J; Hilsenroth, M J; Sivec, H J; Rasch, M A

    1999-12-01

    The purpose of this study was to determine the extent to which the Hand Test (Wagner, 1983) variables Aggression (AGG) and the Acting Out Score (AOS) were able to differentiate a group of children who were identified as aggressive and referred for psychological assessment by their teachers from a nonreferred, control group. Hand Test scores of 37 children who had consecutive referrals for psychological assessment because of aggressiveness were compared to the Hand Test scores of 37 children, matched on age and sex, from a nonreferred group. Through the use of an analysis of variance, AOS and AGG were found to significantly differentiate between the two groups. Spearman (rho) correlations between AGG and AOS scores with aggressive-referred status were rho = .45, p = .0001, and rho = .32, p = .006, respectively. Also, diagnostic efficiency statistics demonstrated moderate to high overall correct classification rates for AOS > or = 0 and AGG > or = 2 in identifying children in the aggressive-referred group. The results of this study provide support for the validity of the AGG and AOS scores in the assessment of aggressive behavior in children and demonstrate the utility of the Hand Test to identify aggressive tendencies in children. PMID:10689647

  6. Optical-X-ray Observations of BL Lacertae Object AO 0235+164

    NASA Astrophysics Data System (ADS)

    Howard, Emily S.; Webb, James R.; Balonek, Thomas J.; McGrath, Elizabeth; Shrader, Chris R.

    1998-11-01

    The BL Lacertea object AO 0235+164 dramatically increased in brightness on October 20, 1997. This outburst was observed with the 1 meter SARA (Southeastern Association for Research in Astronomy) telescope located at Kitt Peak National Observatory (KPNO) located southwest of Tucson, Arizona. As a result of our observations, AO 0235+164 was also observed during the outbust by the Rossi X-ray Timing Experiment (RXTE) and Foggy Bottom Observaotry, Colgate Univserity, New York as a part of a Target of Opportunity (TOO) program. We present here the historical lightcurve of AO 0235+164, Optical observations during the ourtburst from the SARA and Foggy Bottom Observatories and X-ray observations from RXTE. Also, we present multifrequency data during this period and compare the variability of the Optical and X-ray bands.

  7. Up-Regulated Expression of AOS-LOXa and Increased Eicosanoid Synthesis in Response to Coral Wounding

    PubMed Central

    Lõhelaid, Helike; Teder, Tarvi; Tõldsepp, Kadri; Ekins, Merrick; Samel, Nigulas

    2014-01-01

    In octocorals, a catalase–like allene oxide synthase (AOS) and an 8R-lipoxygenase (LOX) gene are fused together encoding for a single AOS-LOX fusion protein. Although the AOS-LOX pathway is central to the arachidonate metabolism in corals, its biological function in coral homeostasis is unclear. Using an acute incision wound model in the soft coral Capnella imbricata, we here test whether LOX pathway, similar to its role in plants, can contribute to the coral damage response and regeneration. Analysis of metabolites formed from exogenous arachidonate before and after fixed time intervals following wounding indicated a significant increase in AOS-LOX activity in response to mechanical injury. Two AOS-LOX isoforms, AOS-LOXa and AOS-LOXb, were cloned and expressed in bacterial expression system as active fusion proteins. Transcription levels of corresponding genes were measured in normal and stressed coral by qPCR. After wounding, AOS-LOXa was markedly up-regulated in both, the tissue adjacent to the incision and distal parts of a coral colony (with the maximum reached at 1 h and 6 h post wounding, respectively), while AOS-LOXb was stable. According to mRNA expression analysis, combined with detection of eicosanoid product formation for the first time, the AOS-LOX was identified as an early stress response gene which is induced by mechanical injury in coral. PMID:24551239

  8. PRIMEIRA LISTA -FI001 1. Resolva a equac~ao de Schroedinger dependente do tempo para a particula

    E-print Network

    de Aguiar, Marcus A. M.

    ´icula livre em 3-D. Escreva as solu¸c~oes nas representa¸c~oes de posi¸c~ao e mo- mento e discuta suas energia e as fun¸c~oes de onda normalizadas. 3. Considere uma part´icula movendo-se em um po¸co de as auto-energias podem ser obtidas graficamente como solu¸c~ao de uma equa¸c~ao transcendental. 4. Calcule

  9. Modeling Chemical Reactions with Single Reactant Specie Abhyudai Singh and Jo~ao Pedro Hespanha

    E-print Network

    Hespanha, João Pedro

    Modeling Chemical Reactions with Single Reactant Specie Abhyudai Singh and Jo~ao Pedro Hespanha Abstract-- A procedure for constructing approximate stochastic models for chemical reactions involving involved in a chemical reaction as the continuous state of a polynomial Stochastic Hybrid System (p

  10. On Euclid's Algorithm and Elementary Number Theory Roland Backhouse, Jo~ao F. Ferreira1

    E-print Network

    Backhouse, Roland

    On Euclid's Algorithm and Elementary Number Theory Roland Backhouse, Jo~ao F. Ferreira1 School of invariance in particular, can be used to derive many results from Euclid's algorithm. We illustrate how and Brocot is also included. Key words: number theory, calculational method, greatest common divisor, Euclid

  11. Automatic Method for Identifying Reaction Coordinates in Complex Systems Ao Ma and Aaron R. Dinner*

    E-print Network

    Dinner, Aaron

    Automatic Method for Identifying Reaction Coordinates in Complex Systems Ao Ma and Aaron R. Dinner-derived electrostatic torque around one of the main-chain bonds, and the collective, long-ranged nature of this interaction accounts for previous failures to characterize this reaction. 1. Introduction Simulations

  12. Design of laser system for Subaru LGS AO Yutaka Hayano a

    E-print Network

    Iye, Masanori

    Design of laser system for Subaru LGS AO Yutaka Hayano a , Yoshihiko Saito b , Norihito Saito c system for Subaru Laser Guide Star Adaptive Optics System. We are manufacturing the quasi. For the optical relay fiber, we are testing an index guided photonic crystal fiber (PCF), whose core material

  13. Modelo An\\'alogo Ac\\'ustico ao Buraco Negro de Schwarzschild

    E-print Network

    Toniato, Júnior Diniz

    2011-01-01

    Um fluido em movimento pode agir sobre o som da mesma forma que os espa\\c{c}o-tempos curvos podem influenciar na trajet\\'oria da luz na relatividade geral. Com isso, pode-se descrever a propaga\\c{c}\\~ao dessas ondas sonoras atrav\\'es de uma m\\'etrica efetiva, sob a qual elas seguir\\~ao geod\\'esicas nulas. Esta disserta\\c{c}\\~ao faz uma revis\\~ao destes estudos concentrando-se em uma analogia ac\\'ustica para um buraco negro de Schwarzschild, demonstrando suas vantagens e limita\\c{c}\\~oes quando aplicada para o estudo da teoria de Hawking. A fluid in moviment can act on the sound the same way that curved space-time can influence on light trajectory in the general relativity. So, one can describe the propagation these sound waves through an effective metric, under wich they will follow null geodesics. This thesis makes a review of these studies focusing in an analogy to Schwarzschild black hole using an acoustic system, showing its advantages and limitations when applied in the study of Hawking's theory.

  14. Universidade Estadual de Campinas Faculdade de Engenharia Eletrica e de Computac~ao

    E-print Network

    Engenharia El´etrica e de Computa¸c~ao. III. T´itulo. T´itulo em Ingl^es: Semiotic analysis of neuroenergetic networks in the construction of intelligent agents Palavras-chave em Ingl^es: Artificial intelligence

  15. Type-Based Analysis of Generic Key Management APIs Pedro Ad~ao

    E-print Network

    Lisboa, Universidade Técnica de

    stored in the key. Examples are the wrap attribute that is associated to keys used to encrypt other keysType-Based Analysis of Generic Key Management APIs Pedro Ad~ao SQIG­Instituto de Telecomunicac have been shown to be subject to tricky attacks based on the improper use of cryptographic keys

  16. Effects of adrenergic agents on the expression of zebrafish (Danio rerio) vitellogenin Ao1

    SciTech Connect

    Yin Naida; Jin Xia; He Jiangyan; Yin Zhan

    2009-07-01

    Teleost vitellogenins (VTGs) are large multidomain apolipoproteins, traditionally considered to be estrogen-responsive precursors of the major egg yolk proteins, expressed and synthesized mainly in hepatic tissue. The inducibility of VTGs has made them one of the most frequently used in vivo and in vitro biomarkers of exposure to estrogen-active substances. A significant level of zebrafish vtgAo1, a major estrogen responsive form, has been unexpectedly found in heart tissue in our present studies. Our studies on zebrafish cardiomyopathy, caused by adrenergic agonist treatment, suggest a similar protective function of the cardiac expressed vtgAo1. We hypothesize that its function is to unload surplus intracellular lipids in cardiomyocytes for 'reverse triglyceride transportation' similar to that found in lipid transport proteins in mammals. Our results also demonstrated that zebrafish vtgAo1 mRNA expression in heart can be suppressed by both {alpha}-adrenergic agonist, phenylephrine (PE) and {beta}-adrenergic agonist, isoproterenol (ISO). Furthermore, the strong stimulation of zebrafish vtgAo1 expression in plasma induced by the {beta}-adrenergic antagonist, MOXIsylyl, was detected by Enzyme-Linked ImmunoSorbent Assay (ELISA). Such stimulation cannot be suppressed by taMOXIfen, an antagonist to estrogen receptors. Thus, our present data indicate that the production of teleost VTG in vivo can be regulated not only by estrogenic agents, but by adrenergic signals as well.

  17. 76 FR 4726 - Avaya Global Services, AOS Service Delivery, Worldwide Services Group, Including Workers Whose...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-01-26

    ..., Maine, New Hampshire, New York, North Carolina, Texas and Wisconsin Reporting to the Network Operations..., and Wisconsin reporting to the Network Operations Center (NOC), Research Triangle Park, North Carolina... insurance (UI) tax account under the name Nortel Networks, Inc. and Avaya Global Services, AOS...

  18. Cursos de dois anosGoverno vai apresentar a proposta, que agrada aos Institutos Politcnicos.

    E-print Network

    Instituto de Sistemas e Robotica

    Cursos de dois anos·Governo vai apresentar a proposta, que agrada aos Institutos Politécnicos. ·0 objetivo passa por aumentar o número de diplomados em Portugal. #12;Cursos de dois anos para breve Proposta seja, cursos de menor duração. Uma ideia aplaudida pelo pre- sidente do conselho coordenador dos

  19. LAMP: LINEAR APPROACH FOR MATCHING POINTS Manuel Marques and Jo~ao Costeira

    E-print Network

    Instituto de Sistemas e Robotica

    programs and imposing a known fixed number of matches. Unlike the recent invariant permutation methods [1LAMP: LINEAR APPROACH FOR MATCHING POINTS Manuel Marques and Jo~ao Costeira Institute for Systems issue in solving this problem is the matching process between the object's 3D points and their 2D

  20. Design considerations of the AO module for the Gemini South multi-conjugate adaptive optics system

    E-print Network

    Design considerations of the AO module for the Gemini South multi-conjugate adaptive optics system Observatory, 670 N. A'ohoku Place, Hilo, HI 96720 B. Optical Design Service, 8 S. Bella Vista Drive, Tucson optics system E. Jamesa , C. Boyera , R. A. Buchroederb , B.L. Ellerbroeka , M. Huntena a Gemini

  1. A Two Phase Hybrid RSS/AoA Algorithm for Indoor Device Localization using Visible Light

    E-print Network

    Little, Thomas

    A Two Phase Hybrid RSS/AoA Algorithm for Indoor Device Localization using Visible Light Gregary B of measuring signal strength, azimuth, and elevation, in a smart space environment over the visible light- ancing performance, cost, and complexity of positioning systems. There have been two main high level

  2. The Subaru Coronagraphic Extreme-Adaptive Optics (SCExAO) system

    E-print Network

    Guyon, Olivier

    AO goals Direct imaging of exoplanets and disks in and near the habitable zone (HZ). Understand how AU radius orbit (= center of habitable zone) 1 AU radius orbit (= center of habitable zone) Log planets form and evolve in the HZ, Constrain occurrence of habitable planets around nearby stars Provide

  3. 412 ORCHIDS JUNE 2008 WWW.AOS.ORG PAST, PRESENT, FUTURE

    E-print Network

    Koptur, Suzanne

    412 ORCHIDS JUNE 2008 WWW.AOS.ORG PAST, PRESENT, FUTURE Special Report/A Newly Naturalized Orchid, golf course, or even the supermarket, please keep your eyes open for our newest orchid immigrant. To learn more about the newest orchid on the block, see our recently published paper in Lankesteriana

  4. Universidade Federal de Santa Catarina Curso de Pos-Graduac~ao em Matematica e

    E-print Network

    Lopes, Artur Oscar

    Coordenador Comiss~ao Examinadora Prof. Dr. Aldrovando L. Azeredo Ara´ujo (UFSC-Orientador) Prof. Dr. Artur O professor Artur Lopes (UFRGS) que al´em de ter participado da banca da defesa, me auxiliou em muitas quest

  5. GPS-Based Navigation And Orbit Determination for the AMSAT AO-40 Satellite

    NASA Technical Reports Server (NTRS)

    Davis, George; Moreau, Michael; Carpenter, Russell; Bauer, Frank

    2002-01-01

    The AMSAT OSCAR-40 (AO-40) spacecraft occupies a highly elliptical orbit (HEO) to support amateur radio experiments. An interesting aspect of the mission is the attempted use of GPS for navigation and attitude determination in HEO. Previous experiences with GPS tracking in such orbits have demonstrated the ability to acquire GPS signals, but very little data were produced for navigation and orbit determination studies. The AO-40 spacecraft, flying two Trimble Advanced Navigation Sensor (TANS) Vector GPS receivers for signal reception at apogee and at perigee, is the first to demonstrate autonomous tracking of GPS signals from within a HEO with no interaction from ground controllers. Moreover, over 11 weeks of total operations as of June 2002, the receiver has returned a continuous stream of code phase, Doppler, and carrier phase measurements useful for studying GPS signal characteristics and performing post-processed orbit determination studies in HEO. This paper presents the initial efforts to generate AO-40 navigation solutions from pseudorange data reconstructed from the TANS Vector code phase, as well as to generate a precise orbit solution for the AO-40 spacecraft using a batch filter.

  6. Universidade Estadual de Campinas Instituto de Matematica Estatistica e Computac~ao Cientifica

    E-print Network

    Torres, Fernando

    , como requi- sito parcial para obten¸c~ao do T´itulo de Doutor em Matem´atica. #12;A Deus "Senhor, se que me ensinaram durante toda a vida. Tomara Deus que eu possa transmit´i-la no exerc´icio de minha

  7. Scale-Independent Hysteresis Switching ? ?? Jo~ao P. Hespanha 1 and A. Stephen Morse 2

    E-print Network

    Hespanha, João Pedro

    Scale-Independent Hysteresis Switching ? ?? Jo~ao P. Hespanha 1 and A. Stephen Morse 2 1 Dept logic inspired by the hysteresis switching logic considered in [7, 11]. The new logic also uses hysteresis to prevent chatter, but unlike its predecessor in [7, 11], it is \\scale-independent" as well

  8. Improved tilt sensing in an LGS-based tomographic AO system based on instantaneous PSF estimation

    NASA Astrophysics Data System (ADS)

    Veran, Jean-Pierre

    2013-12-01

    Laser guide star (LGS)-based tomographic AO systems, such as Multi-Conjugate AO (MCAO), Multi-Object AO (MOAO) and Laser Tomography AO (LTAO), require natural guide stars (NGSs) to sense tip-tilt (TT) and possibly other low order modes, to get rid of the LGS-tilt indetermination problem. For example, NFIRAOS, the first-light facility MCAO system for the Thirty Meter Telescope requires three NGSs, in addition to six LGSs: two to measure TT and one to measure TT and defocus. In order to improve sky coverage, these NGSs are selected in a so-called technical field (2 arcmin in diameter for NFIRAOS), which is much larger than the on-axis science field (17x17 arcsec for NFIRAOS), on which the AO correction is optimized. Most times, the NGSs are far off-axis and thus poorly corrected by the high-order AO loop, resulting in spots with low contrast and high speckle noise. Accurately finding the position of such spots is difficult, even with advanced methods such as matched-filtering or correlation, because these methods rely on the knowledge of an average spot image, which is quite different from the instantaneous spot image, especially in case of poor correction. This results in poor tilt estimation, which, ultimately, impacts sky coverage. We propose to improve the estimation of the position of the NGS spots by using, for each frame, a current estimate of the instantaneous spot profile instead of an average profile. This estimate can be readily obtained by tracing wavefront errors in the direction of the NGS through the turbulence volume. The latter is already computed by the tomographic process from the LGS measurements as part of the high order AO loop. Computing such a wavefront estimate has actually already been proposed for the purpose of driving a deformable mirror (DM) in each NGS WFS, to optically correct the NGS spot, which does lead to improved centroiding accuracy. Our approach, however, is much simpler, because it does not require the complication of extra DMs, which would need to be driven in open-loop. Instead, it can be purely implemented in software, does not increase the real-time computational burden significantly, and can still provide a significant improvement in tilt measurement accuracy, and therefore in sky-coverage. In this paper, we illustrate the benefit of this new tilt measurement strategy in the specific case of NFIRAOS, under various observing conditions, in comparison with the more traditional approaches that ignore the instantaneous variations of the NGS spot profiles.

  9. The Robo-AO software: Fully autonomous operation of a laser guide star adaptive optics and science system

    E-print Network

    Riddle, Reed L; Law, Nicholas M; Tendulkar, Shriharsh P; Baranec, Christoph; Rudy, Alexander R; Sitt, Marland; Arya, Ankit; Papadopoulos, Athanasios; Ramaprakash, A N; Dekany, Richard G; 10.1117/12.925475

    2013-01-01

    Robo-AO is the first astronomical laser guide star adaptive optics (AO) system designed to operate completely independent of human supervision. A single computer commands the AO system, the laser guide star, visible and near-infrared science cameras (which double as tip-tip sensors), the telescope, and other instrument functions. Autonomous startup and shutdown sequences as well as concatenated visible observations were demonstrated in late 2011. The fully robotic software is currently operating during a month long demonstration of Robo-AO at the Palomar Observatory 60-inch telescope.

  10. Calculo Diferencial e Integral II Lista de exercicios das aulas de revis~ao para o Teste 2

    E-print Network

    Ventura, Joana

    Teorema da Fun¸c~ao Inversa, Teorema da Fun¸c~ao Impl´icita Teste de Recupera¸c~ao/Exame ­ 24´ivel localmente em torno do ponto (0, ). Calcule a derivada da fun¸c~ao inversa local no ponto (0, 0). Teste 2 ­ 2), com f1, f2 fun¸c~oes de classe C1 , definidas numa vizinhan¸ca do ponto y = -1. Calcule f1(-1) e f2

  11. The Pseudomonas syringae type III effector tyrosine phosphatase HopAO1 suppresses innate immunity in Arabidopsis thaliana.

    PubMed

    Underwood, William; Zhang, Shuqun; He, Sheng Y

    2007-11-01

    The bacterial pathogen Pseudomonas syringae pv. tomato (Pst) strain DC3000 infects tomato and Arabidopsis plants, and is a model for studying the molecular basis of bacterial disease. Pst DC3000 secretes a battery of largely uncharacterized effector proteins into host cells via a type-III secretion system (TTSS). Little is currently known about the molecular mechanisms by which individual TTSS effectors promote virulence. The effector HopAO1 has similarity to protein tyrosine phosphatases, including a conserved catalytic site, and suppresses the hypersensitive response (HR) in some non-host plants. Whether HopAO1 has a similar effect in the host Arabidopsis is not clear. Here, we show that transgenic expression of HopAO1 in Arabidopsis suppresses callose deposition elicited by the Pst DC3000 hrpA mutant, and allows the normally non-pathogenic hrpA mutant to multiply within the leaf tissue. HopAO1 also suppresses resistance to Pst DC3000 induced by flg22, a pathogen-associated molecular pattern (PAMP). However, HopAO1 does not suppress the HR triggered by several classical avirulence genes. These results suggest that HopAO1 targets primarily PAMP-induced innate immunity in Arabidopsis. The virulence function of HopAO1 is dependent on an intact phosphatase catalytic site, as transgenic plants expressing a catalytically inactive derivative do not show these effects. Intriguingly, expression of the catalytically inactive HopAO1 has a dominant-negative effect on the function of the wild-type HopAO1. Analysis of mitogen-activated protein kinase (MAPK) activity suggests that HopAO1 targets a step downstream or independent of MAPK activation. Genome-wide expression analysis revealed that expression of several well-known defense genes was suppressed in hrpA mutant-infected HopAO1 transgenic plants. PMID:17877704

  12. Academic Services Assoc Univ Librn

    E-print Network

    Pasternack, Gregory B.

    & Delivery Services Head Gustafson, Robin Research Services Head Callahan, Beth Special Collections Head, Daniel; Librn Gustafson, Ruth; Librn Vacant; Asst/Assoc/Librn Johnson, Deanna; Librn Lanius, Alison; Lib

  13. Academic Services Assoc Univ Librn

    E-print Network

    Ishida, Yuko

    & Delivery Services Head Gustafson, Robin Research Services Head Callahan, Beth Special Collections Head Delgadillo, Roberto; Librn Goldstein, Daniel; Librn Gustafson, Ruth; Librn HeyerGray, Robert; Librn

  14. Academic Services Assoc Univ Librn

    E-print Network

    Pasternack, Gregory B.

    & Delivery Services Head Gustafson, Robin Research Services Head Callahan, Beth Special Collections Head, Roberto; Librn Goldstein, Daniel; Librn Gustafson, Ruth; Librn Johnson, Deanna; Librn Meister, Marcia

  15. Arboretum Battle Park Univ. Square

    E-print Network

    McLaughlin, Richard M.

    ") ") ") ") ")") ") ") ") ") ")") ") ") ") ") ") ") ") ") ") ") ") ") ") ") ") ") ") McCorkle Place Polk Place Coker Arboretum Battle Park Central Park Kenan Woods The Pit Activities Hanes Art Field House OldWest Ackland Center Genetic NC Cancer Granville Towers Excellence Koury Cancer

  16. 76 FR 19753 - Intent To Prepare a Draft Environmental Impact Statement for the `?ao Stream Flood Control...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-04-08

    ... ` ao Stream Flood Control Project, Wailuku, Maui, HI AGENCY: Department of the Army, U.S. Army Corps of... design deficiency in the existing ` ao Stream Flood Control Project, Wailuku, Maui, HI. This effort is..., Civil and Public Works Branch (CEPOH-PP-C), Building 230, Fort Shafter, HI 96858- 5440....

  17. The 384-channel prototype of DM Electronics for ELT AO systems

    NASA Astrophysics Data System (ADS)

    Caputa, Kris; Atwood, Jenny; Herriot, Glen; Veran, Jean-Pierre; Spanò, Paolo; Zielinski, Adam

    2014-08-01

    High order AO subsystems of the ELT require technological advancements in the Deformable Mirror (DM) construction and corresponding improvements in the drive electronics. Advanced prototyping is currently under way at NSI-Herzberg to reduce risks of deploying untried technology in the TMT AO subsystem NFIRAOS. We have developed a 96-channel output module and constructed a sub-scale DM Electronics prototype NDME384 with 384 output channels based on 4 such modules. French DM vendor Cilas has fabricated the NFIRAOS DM Breadoboard with 360 piezoelectric actuators in a 60×6 matrix, to demonstrate the DM technology to be deployed in NFIRAOS wavefront correctors. We present the results of testing our NDME384 prototype while driving the NFIRAOS DM Breadoboard.

  18. CANARY phase B: on-sky open-loop tomographic LGS AO results

    NASA Astrophysics Data System (ADS)

    Morris, Tim; Gendron, Eric; Basden, Alastair; Martin, Olivier; Osborn, James; Henry, David; Hubert, Zoltan; Sivo, Gaetano; Gratadour, Damien; Chemla, Fanny; Sevin, Arnaud; Cohen, Matthieu; Younger, Eddy; Vidal, Fabrice; Wilson, Richard; Butterley, Tim; Bitenc, Urban; Reeves, Andrew; Bharmal, Nazim; Raynaud, Henri-François; Kulcsar, Caroline; Conan, Jean-Marc; Huet, Jean-Michel; Perret, Denis; Dickson, Colin; Atkinson, David; Bailie, Tom; Longmore, Andy; Todd, Stephen; Talbot, Gordon; Morris, Simon; Rousset, Gérard; Myers, Richard

    2014-07-01

    CANARY is an on-sky Laser Guide Star (LGS) tomographic AO demonstrator that has been in operation at the 4.2m William Herschel Telescope (WHT) in La Palma since 2010. In 2013, CANARY was upgraded from its initial configuration that used three off-axis Natural Guide Stars (NGS) through the inclusion of four off-axis Rayleigh LGS and associated wavefront sensing system. Here we present the system and analysis of the on-sky results obtained at the WHT between May and September 2014. Finally we present results from the final `Phase C' CANARY system that aims to recreate the tomographic configuration to emulate the expected tomographic AO configuration of both the AOF at the VLT and E-ELT.

  19. UFPR Bacharelado em Ci^encia da Computac~ao CI064 Software Basico

    E-print Network

    Hexsel, Roberto A

    endere¸co de cada um dos dos componentes de qualquer elemento do vetor vet[ ] -- a fun¸c~ao deve calcular elem { // &(vet[0]) = 0x8000.8000; int a; ... int b; acum = 0; int c; for (i=0; i d[4]; acum += vet[i].c + (int)vet[i].d[2]; } elemType; vet[N+1].a = acum; int i,acum; ... elem

  20. World-wide deployment of Robo-AO visible-light robotic laser adaptive optics systems

    NASA Astrophysics Data System (ADS)

    Baranec, Christoph; Riddle, Reed; Law, Nicholas Michael; Lu, Jessica R.; Tonry, John; Tully, R. Brent; Wright, Shelley; Kulkarni, Shrinivas; Severson, Scott; Choi, Philip; Ramaprakash, A.; Chun, Mark; Connelley, Mike; Tokunaga, Alan; Hall, Donald

    2015-08-01

    In the next few years, several modest-sized telescopes around the world will be upgraded with autonomous laser adaptive optics systems based on the Robo-AO prototype deployed at the Palomar Observatory 1.5-m telescope. The prototype commenced scientific operations in June 2012 and more than 19,000 observations have since been performed at the ~0.12" visible-light diffraction limit. We are planning to move the prototype system to the 2.1-m telescope at Kitt Peak for a 3-year deployment which will serve a consortium of users including Caltech, the University of Hawai`i, IUCAA, NCU and institutions in China. Additionally, 2 months per year will be made available to the US astronomical community.New Robo-AO systems are in various stages of development: a clone by IUCAA for the 2-m IGO telescope in India; a natural guide star variant, KAPAO, by Pomona College at the 1-m Table Mountain telescope in California; and second generation Robo-AO systems are planned for the 3-m IRTF and 2.2-m University of Hawai'i telescopes on Maunakea, Hawai`i. The latter will exploit Maunakea's excellent observing conditions to provide higher Strehl ratios, sharper imaging, ~0.07", and correction to lambda = 400 nm. An additional infrared integral-field spectrograph will be fed by the UH 2.2-m Robo-AO system to quickly classify transients, such as supernovae and asteroids, discovered by the ATLAS system in Hawai`i.

  1. Mec^anica Estatistica Lista 3 1 Deduza a ocupac~ao media de niveis

    E-print Network

    Levin, Yan

    Mec^anica Estat´istica ­ Lista 3 1 Deduza a ocupa¸c~ao m´edia de n´iveis com energia num sistema dividir N f´ermions entre V n´iveis de energia, sendo que a degeneresc^encia de cada n´ivel ´e gi e energia j num sistema de b´osons livres usando o ensemble microcan^onico. Dica: de quantos jeitos

  2. MAC 0316/5754 --Conceitos de Linguagens de Programac~ao Primeiro Semestre de 2010

    E-print Network

    Reverbel, Francisco

    'jornal) > 2 (um jornal custa 2 reais) (preco 'duzia-de-bananas) > 4 (uma d´uzia de bananas custa 4 reais) Considere uma lista de compras com o seguinte formato: '([jornal 1] [duzia-de-bananas 3] [litro-de-leite 2 comprar um jornal, tr^es d´uzias de bananas, dois litros de leite, etc. (a) Escreva uma fun¸c~ao total

  3. ASSIST: development of a test-infrastructure for the VLT AO facility

    NASA Astrophysics Data System (ADS)

    Stuik, Remko; Arsenault, Robin; Deep, Atul; Delabre, Bernard; Hallibert, Pascal; Jolissaint, Laurent; Hubin, Norbert; Kendrew, Sarah; Madec, Pierre-Yves; Paufique, Jerome; Stroebele, Stefan

    2007-09-01

    ASSIST - The Adaptive Secondary Setup and Instrument STimulator is a test setup to verify the operation of three elements of the VLT Adaptive Optics Facility, namely the Deformable Secondary Mirror (DSM) and the two AO systems using this DSM, the AO system for the visible light integral field spectrograph MUSE (GALACSI) and the AO system for the IR wide field imager HAWK-I (GRAAL). To support the testing of these elements, ASSIST will provide both an interferometry setup for testing the DSM as well as a full atmospheric turbulence simulator and star simulator to mimic the conditions at the telescope. To test the instruments using the DSM, the output beam is matched the output beam of the VLT telescope, including the correct exit-pupil and high-quality imaging and a similar hardware interface is provided. Since one of the modes to be verified is nearly diffraction limited, also the thermal and vibrational stability are very important, with strong constraints on both the mechanical as well as the optical design.

  4. SCExAO: the most complete instrument to characterize exoplanets and stellar environments

    NASA Astrophysics Data System (ADS)

    Lozi, Julien; Guyon, Olivier; Jovanovic, Nemanja; Singh, Garima; Doughty, Danielle; Pathak, Prashant; Goebel, Sean; Kudo, Tomoyuki

    2015-12-01

    The Subaru Coronagraphic Extreme Adaptive Optics (SCExAO) instrument, currently under development for the Subaru Telescope, optimally combines state-of-the-art technologies to directly study exoplanets and stellar environments at the diffraction limit, both in visible and infrared light (0.6 to 2.4 um). The instrument already includes an ultra-fast visible pyramid wavefront sensor operating at 3.5 kHz, a 2k-actuator deformable mirror, a set of optimal coronagraphs that can work as close as 1 l/D, a low-order wavefront sensor, a high-speed speckle control, and two visible interferometric modules, VAMPIRES and FIRST. Stability of the wavefront correction has already been demonstrated on sky, and SCExAO is already producing scientific results. After the integration of the Integral Field Spectrograph (IFS) CHARIS and a Microwave Kinetic Inductance Detector (MKID) in 2016, SCExAO will be one of the most powerful and effective tools for characterizing exoplanets and disks.

  5. Microwelding of various metallic materials under ultravacuum (AO 138-10)

    NASA Technical Reports Server (NTRS)

    Assie, Jean Pierre; Conde, Eric

    1991-01-01

    The first finding from the AO 138-10 is that cold welding never occurred, and that microwelds didn't even affect the reference (presumably microweld prone) pairs of metals consisting of gold, silver, and chromium. The scientific disappointment from these results must be tempered by the notion of a static AO 138-10 experiment, reflecting the passive character of the global Long Duration Exposure Facility (LDEF) flight. Thus far, it has been theorized that cold welding results from the peeling of the oxide layer, that is formed in an earth environment, by the space environment since such a layer no longer grows in space. In fact, such stripping of the oxide layer supposes relative motion of the contacting materials. In the absence of such motion, as in this experiment, oxidation will preserve its integrity and continue to prevent microwelding. More bewildering is that there was no microwelding of the reference pairs. Even though AO 138-10 failed scientific expectations, as did the LDEF structure with cold welding, the positive, functional aspect to keep in mind is the safe operation of single-shot (appendage releasing and/or latching) mechanisms, unhindered by microwelding in a space vacuum, as now demonstrated by the statically representative pairs of materials. Other aspects of the experiment are discussed.

  6. AO/NAO Response to Climate Change. 1; Respective Influences of Stratospheric and Tropospheric Climate Changes

    NASA Technical Reports Server (NTRS)

    Rind, D.; Perlwitz, J.; Lonergan, P.

    2005-01-01

    We utilize the GISS Global Climate Middle Atmosphere Model and 8 different climate change experiments, many of them focused on stratospheric climate forcings, to assess the relative influence of tropospheric and stratospheric climate change on the extratropical circulation indices (Arctic Oscillation, AO; North Atlantic Oscillation, NAO). The experiments are run in two different ways: with variable sea surface temperatures (SSTs) to allow for a full tropospheric climate response, and with specified SSTs to minimize the tropospheric change. The results show that tropospheric warming (cooling) experiments and stratospheric cooling (warming) experiments produce more positive (negative) AO/NAO indices. For the typical magnitudes of tropospheric and stratospheric climate changes, the tropospheric response dominates; results are strongest when the tropospheric and stratospheric influences are producing similar phase changes. Both regions produce their effect primarily by altering wave propagation and angular momentum transports, but planetary wave energy changes accompanying tropospheric climate change are also important. Stratospheric forcing has a larger impact on the NAO than on the AO, and the angular momentum transport changes associated with it peak in the upper troposphere, affecting all wavenumbers. Tropospheric climate changes influence both the A0 and NAO with effects that extend throughout the troposphere. For both forcings there is often vertical consistency in the sign of the momentum transport changes, obscuring the difference between direct and indirect mechanisms for influencing the surface circulation.

  7. 19 `eme Congr`es Francais de Mecanique Marseille, 24-28 ao^ut 2009 Contact au sein d'une tige elastique nouee

    E-print Network

    Neukirch, Sébastien

    7190, Institut Jean le Rond d'Alembert, F-75005, Paris, France b. CNRS & UPMC Univ Paris 06, UMR 7190, Institut Jean le Rond d'Alembert, F-75005, Paris, France R´esum´e : Nous calculons la r´eponse m´ecanique d´eussi dans le cadre d'exp´erience `a mol´ecule unique `a nouer une mol´ecule d'ADN [4], tandis que d

  8. Compilação de dados atômicos e moleculares do UV ao IV próximo para uso em síntese espectral

    NASA Astrophysics Data System (ADS)

    Coelho, P.; Barbuy, B.; Melendez, J.; Allen, D. M.; Castilho, B.

    2003-08-01

    Espectros sintéticos são utéis em uma grande variedade de aplicações, desde análise de abundâncias em espectros estelares de alta resolução ao estudo de populações estelares em espectros integrados. A confiabilidade de um espectro sintético depende do modelo de atmosfera adotado, do código de formação de linhas e da qualidade dos dados atômicos e moleculares que são determinantes no cálculo das opacidades da fotosfera. O nosso grupo no departamento de Astronomia no IAG tem utilizado espectros sintéticos há mais de 15 anos, em aplicações voltadas principalmente para a análise de abundâncias de estrelas G, K e M e populações estelares velhas. Ao longo desse tempo, as listas de linhas vieram sendo construídas e atualizadas continuamente, e alguns acréscimos recentes podem ser citados: Castilho (1999, átomos e moléculas no UV), Schiavon (1998, bandas moleculares de TiO) e Melendez (2001, átomos e moléculas no IV próximo). Com o intuito de calcular uma grade de espectros do UV ao IV próximo para uso no estudo de populações estelares velhas, se fazia necessário compilar e homogeneizar as diversas listas em apenas uma lista atômica e uma molecular. Nesse processo, a nova lista compilada foi correlacionada com outras bases de dados (NIST, Kurucz Database, O' Brian et al. 1991) para atualização dos parâmetros que caracterizam a transição atômica (comprimento de onda, log gf e potencial de excitação). Adicionalmente as constantes de interação C6 foram calculadas segundo a teoria de Anstee & O'Mara (1995) e artigos posteriores. As bandas moleculares de CH e CN foram recalculadas com o programa LIFBASE (Luque & Crosley 1999). Nesse poster estão detalhados os procedimentos citados acima, as comparações entre espectros calculados com as novas listas e espectros observados em alta resolução do Sol e de Arcturus, e uma análise do impacto decorrente da utilização de diferentes modelos de atmosfera no espectro sintético. Ao final, temos uma lista de linhas atômicas com mais de 24.000 linhas e uma lista molecular com as moléculas CN, CH, OH, NH, MgH, C2, TiO Gama, CO, FeH, adequadas ao estudo de estrelas G, K e M e populações estelares velhas.

  9. Relative importance of the AO, NAO and Aleutian Low in predicting regional climate change

    NASA Astrophysics Data System (ADS)

    Paeth, H.; Rauthe, M.; Hense, A.

    2003-04-01

    In recent years, several observational and climate model studies have drawn a picture of Northern Hemisphere circulation modes which are largely sensitive to the greenhouse forcing with implications for regional climate change. The dominant candidates are the Arctic Oscillation (AO), the North Atlantic Oscillation (NAO) and the Aleutian Low (AL). Here, we consider all these modes equally and try to get insight into their relative importance with respect to temperature and rainfall variability over the Northern Hemisphere. The relative importance of AO, NAO and AL time series is determined by stepwise multiple regression with cross validation at every grid point of the globe. This tool is appropriate to sort the predictors - AO, NAO and AL - by their relative contribution to temperature and rainfall predictability and to evaluate the predictability with respect to an independent control data set. This allows to cut off the number of predictors as soon as the mean square error between the multiple regression model and the control data set is increasing. For better reliability of our results, the procedure is applied many times with 100 permutations. This part is based on the NCEP reanalysis data set. For estimating future temperature and rainfall anomalies, a broad model intercomparison study has been carried out, including most state-of-the-art models of the international modeler community. For each circulation mode superensemble-mean time series under greenhouse-gas (GHG) only and GHG plus sulphate aerosol conditions are determined respectively. Concerning annual-mean temperature, the total explained variance by an optimal number of predictors amounts to 60% over northern Europe, Siberia and North America. At most grid points of the Northern Hemisphere, the AO is the most prominent mode, also in the European-Atlantic sector where the NAO is supposed to be the main player. In the North Pacific sector and in some regions of the low latitudes the AL is dominating. The NAO mainly occupies rank 2 in the surroundings of the North Atlantic, the AO holds the same rank in the North Pacific region. This picture is largely independent of the 100 permutations. In terms of the year-to-year precipitation changes, the impact of the circulation modes is less striking, probably due to the high amount of internal variability. However, large-scale anomalies over northern Europe and the western Mediterranean, induced by the AO, as well as the western United States, induced by the AL, are statistically significant. Inserting the superensemble-mean index values, representative of the late 21st century, in the regression equation with optimal numbers of predictors leads to an estimate of future circulation-induced temperature and rainfall anomalies. This contribution is found to be considerable, amounting to around 25% of the total expected mean change as depicted in the IPCC 2001 report.

  10. Increasing Efficiency at the NTF by Optimizing Model AoA Positioning

    NASA Technical Reports Server (NTRS)

    Crawford, Bradley L.; Spells, Courtney

    2006-01-01

    The National Transonic Facility (NTF) at NASA Langley Research Center (LaRC) is a national resource for aeronautical research and development. The government, military and private industries rely on the capability of this facility for realistic flight data. Reducing the operation costs and keeping the NTF affordable is essential for aeronautics research. The NTF is undertaking an effort to reduce the time between data points during a pitch polar. This reduction is being driven by the operating costs of a cryogenic facility. If the time per data point can be reduced, a substantial cost savings can be realized from a reduction in liquid nitrogen (LN2) consumption. It is known that angle-of-attack (AoA) positioning is the longest lead-time item between points. In January 2005 a test was conducted at the NTF to determine the cause of the long lead-time so that an effort could be made to improve efficiency. The AoA signal at the NTF originates from onboard instrumentation then travels through a number of different systems including the signal conditioner, digital voltmeter, and the data system where the AoA angle is calculated. It is then fed into a closed loop control system that sets the model position. Each process along this path adds to the time per data point affecting the efficiency of the data taking process. Due to the nature of the closed loop feed back AoA control and the signal path, it takes approximately 18 seconds to take one pitch pause point with a typical AoA increment. Options are being investigated to reduce the time delay between points by modifying the signal path. These options include: reduced signal filtering, using analog channels instead of a digital volt meter (DVM), re-routing the signal directly to the AoA control computer and implementing new control algorithms. Each of these has potential to reduce the positioning time and together the savings could be significant. These timesaving efforts are essential but must be weighed against possible loss of data quality. For example, a reduction in filtering can introduce noise into the signal and using analog channels could result in some loss of accuracy. Data quality assessments need to be performed concurrently with timesaving techniques since data quality parameters are essential in maintaining facility integrity. This paper will highlight time saving efforts being undertaken or studied at the NTF. It will outline the instrumentation and computer systems involved in setting of the model pitch attitude then suggest changes to the process and discuss how these system changes would effect the time between data points. It also discusses the issue of data quality and how the potential efficiency changes in the system could affect it. Lastly, it will discuss the possibility of using an open loop control system and give some pros and cons of this method.

  11. A-O Q-switching of 2.1-?m laser

    NASA Astrophysics Data System (ADS)

    Zheng, Jia; Liu, Jingjiao; Tang, Yi; Hu, Yongzhao

    2005-01-01

    2.1?m solid state laser operating at room temperature is a very useful laser source for optical communication, medical care, air pollution monitoring and Lidar, etc. It is eye-safe. It is also a very ideal pump source for optic parametric oscillator to get 3?m -5?m radiation. In order to further explore its potential applications, higher peak power and shorter pulse width are very desirable. Q-switching the laser is a most practical way to realize those goals. Among the most common used Q-switching techniques, mechanical Q-switching is not preferred due to that it involves use of a rotating motor, which has lower life time and causes undesirable vibration. E-O Q-switch material in this wavelength range is very expensive and quite susceptible to optical damage. On the other hand, low OH concentration quartz material exhibits very low absorption at the 2.1?m. The Cr:Tm:Ho:YAG 2.1?m laser has undesirable lower gain from the laser efficiency point of view, but offers a feasibility of using the A-O device for the Q-switching even the laser is pulse pumped. The Cr:Tm:Ho:YAG 2.1?m laser is a so called quasi-three level laser, which is characterized as having a higher threshold and lower gain. This study is focused on the optimization of the laser resonator design and the A-O Q-switch design for a higher laser peak power and shorter pulse width. Factors considered in the study include AO Q-switch"s RF frequency, modulation depth, active aperture, resonator length, resonator loss and pumping design, etc. Experiment results are compared with the Q-switched quasi-three level laser model. Final result of the Q-switched 2.1?m laser after preliminary optimization will be presented.

  12. Effects of The NAO/ao Fluctuations Upon Precipitation Over Sardinia In The 20th Century.

    NASA Astrophysics Data System (ADS)

    Delitala, A.

    The effects at regional scale of decadal fluctuation of the NAO/AO on the 20th cen- tury precipitation over Sardinia will be analyzed. Decadal variations of precipitation will initially be described, by use of the Standardized Anomaly Index (Katz &Glantz, 1986) based on two indicators: the cumulated precipitation (the classical approach) and the number of rainy days. A clear decreasing trend in the last two deacdes, statis- tically significant at the 1% level, will be highlighted. A short survey of connections with MSLP and 500hPA Geopotential Height fields will be used to give an overview of dependence of Sardinia (regional) precipitation on synoptic-scale and planetary scale features. In the following part, three different paradigms of the NAO/AO will be used: the classical two point obscillation, the PCA analysis of MSLP (Thompson &Wallace, 1998) and the centers of action approach (Machel et al., 1998). The results of the anal- ysis of the effects of NAO/AO (described in the former three ways) on precipitation will enable to discuss how such a teleconnection influences regional precipitation on this part of the Mediterranean. Statistical significance of each result will be provided during the presentation. Katz, R., Glantz, M., 1986. "Anatomy of a Rainfall Index". Mon. Wea. Rev., 114, 764-771. Mächel, M., Kapala, A., Flohn, H., 1998. "Behaviour of the Centers of Action above the Atlantic since 1881. Part I: Characteristics of seasonal and interannual Variability". Int. Jou. of Climatol., 18, 1-22. Thopson, D. W. J., Wallace, J. M., 1998. "The Arctic Oscillation signature in the wintertime geopotential height and temperature fields". Geoph. Res. Let., 25, 1297- 1300.

  13. Calculo Diferencial e Integral II Exercicio de Aplicac~ao 6 -Mec^anica de Fluidos

    E-print Network

    Natário, José

    C´alculo Diferencial e Integral II Exerc´icio de Aplica¸c~ao 6 - Mec^anica de Fluidos Um fluido ´e serem fun¸c~oes de classe C: (t, x) e v(t, x) representam a densidade e a velocidade do fluido que ocupa´inio regular, a massa total do fluido contido em A no instante t ´e M(t) = A dV3 e portanto para haver

  14. Using DARC in a multi-object AO bench and in a dome seeing instrument

    NASA Astrophysics Data System (ADS)

    Sáez, Norman; Basden, Alistair; Guzmán, Dani; Dubost, Nicolás.; Berdja, Amokrane

    2014-07-01

    The Durham adaptive Optics Real Time Controller (DARC)1 is a real-time system for astronomical adaptive optics systems originally developed at Durham University and in use for the CANARY instrument. One of its main strengths is to be a generic and high performance real-time controller running on an off-the-shelf Linux computer. We are using DARC for two different implementations: BEAGLE,2 a Multi-Object AO (MOAO) bench system to experiment with novel tomographic reconstructors and LOTUCE2,3 an in-dome turbulence instrument. We present the software architecture for each application, current benchmarks and lessons learned for current and future DARC developers.

  15. Tomographic separation of composite spectra - The components of the O-star spectroscopic binary AO Cassiopeiae

    NASA Technical Reports Server (NTRS)

    Bagnuolo, William G., Jr.; Gies, Douglas R.

    1991-01-01

    The UV photospheric lines of the short-period, double-lined O-star spectroscopic binary AO Cas are analyzed. Archival data from IUE (16 spectra uniformly distributed in orbital phase) were analyzed with a tomography algorithm to produce the separate spectra of the two stars in six spectral regions. The spectral classifications of the primary and secondary, O9.5 III and O8 V, respectively, were estimated through a comparison of UV line ratios with those in spectral standard stars. An intensity ratio of 0.5-0.7 (primary brighter) at 1600 A is compatible with the data.

  16. A Compact Extreme Scattering Event Cloud Towards AO 0235+164

    E-print Network

    Senkbeil, C E; Lovell, J E J; Macquart, J -P; Cimò, G; Jauncey, D L

    2007-01-01

    We present observations of a rare, rapid, high amplitude Extreme Scattering Event toward the compact BL-Lac AO 0235+164 at 6.65 GHz. The ESE cloud is compact; we estimate its diameter between 0.09 and 0.9 AU, and is at a distance of less than 3.6 kpc. Limits on the angular extent of the ESE cloud imply a minimum cloud electron density of ~ 4 x 10^3 cm^-3. Based on the amplitude and timescale of the ESE observed here, we suggest that at least one of the transients reported by Bower et al. (2007) may be attributed to ESEs.

  17. An overview of the first results on the solar array passive LDEF experiment (sample), AO171

    NASA Astrophysics Data System (ADS)

    Whitaker, Ann F.; Young, Leighton E.

    1991-06-01

    Space environmental effects were visibly obvious on components of experiment AO171 which contained solar cells, composites, polymeric thin films, solar reflectors, protective coatings, metals, paints , and elastomers. Micrometeoroid/space debris impacts were observed on all experiment elements. Luminescence of polyimide, silicone, and polyurethane materials occurred under black light examination. Outgassing of RTV511 occurred mainly as a result of insufficient thermal vacuum bakeout. Solar cell degradation was predominantly below 10 percent. Elastomers lost mass and discolored; composites showed evidence of atomic oxygen attack, and unprotected thin polymer films eroded away.

  18. Aconteceu no SEPT: Aula inaugural no Laboratrio de Ensaios Qumicos (LEQPetro) e visita ao Parque da Cincia

    E-print Network

    Paraná, Universidade Federal do

    com muito orgulho. Foto 1: Visão geral da aula pratica Foto 2: prof. Guimarães auxiliando os preocupado com a qualidade e excelência do ensino. Foto 3: Estudantes do 1º. ano na visita ao Parque Newton F

  19. Construc~ao de func~oes de Morse discretas THOMAS LEWINER, HELIO LOPES AND GEOVAN TAVARES

    E-print Network

    Lewiner, Thomas (Thomas Lewiner)

    Construc¸~ao de func¸~oes de Morse discretas THOMAS LEWINER, H´ELIO LOPES AND GEOVAN TAVARES, tavares}@mat.puc--rio.br. Abstract. A teoria de Morse ´e considerada uma ferramenta matem´atica importante celulares, aumentando o n´umero de suas aplicac¸~oes. Uma vez que uma func¸~ao de Morse ´e definida em uma

  20. PRIMEIRA LISTA -FI002 -Teorias de Perturbac~ao 1. Uma particula esta aprisionada em um poco de potencial nulo para

    E-print Network

    de Aguiar, Marcus A. M.

    perturba¸c~ao V (x) = -g(x - L/2). Calcule a corre¸c~ao nos n´iveis de energia at´e segunda ordem no par uma transi¸c~ao para o estado de um el´etron no n´ivel (1s) e outro livre. Aproxime o estado livre por

  1. LDEF (Flight), AO187-01 : The Chemistry of Micrometeoroids, Tray A03

    NASA Technical Reports Server (NTRS)

    1990-01-01

    LDEF (Flight), AO187-01 : The Chemistry of Micrometeoroids, Tray A03 EL-1994-00680 LDEF (Flight), AO187-01 : The Chemistry of Micrometeoroids, Tray A03 The flight photograph was taken with the LDEF on the Orbiter's RMS arm prior to berthing the spacecraft in the cargo bay. The canisters are in their open condition (they were expected to open about two (2) weeks after launch and close about eleven (11) months into the mission) with three (3) full panels and 3/4th of the fourth panel covered with a highly reflective gold foil (>99.99 percent pure).The remaining area is covered with strips of other detector materials: zirconium, beryllium, titanium, platium, aluminum, carbon, Kapton, polyethylene and TEFLON®. The exposed fasteners are non-magnetic stainless steel. All of the exposed materials seem to be secure and no damage is evident. The contamination stain that has changed the white paint dot on the tray clamp blocks to brown also coats the tray flanges and the aluminum canister hardware. The end support beam scuff plate in the photograph was a bright yellow prior to launch but is a much darker, mustard yellow after the space exposure.

  2. Robotic laser adaptive optics imaging of 715 Kepler exoplanet candidates using Robo-AO

    SciTech Connect

    Law, Nicholas M.; Ziegler, Carl; Morton, Tim; Riddle, Reed; Tendulkar, Shriharsh P.; Bui, Khanh; Dekany, Richard G.; Kulkarni, Shrinivas; Punnadi, Sujit; Baranec, Christoph; Ravichandran, Ganesh; Johnson, John Asher; Burse, Mahesh P.; Das, H. K.; Ramaprakash, A. N.

    2014-08-10

    The Robo-AO Kepler Planetary Candidate Survey is observing every Kepler planet candidate host star with laser adaptive optics imaging to search for blended nearby stars, which may be physically associated companions and/or responsible for transit false positives. In this paper, we present the results from the 2012 observing season, searching for stars close to 715 Kepler planet candidate hosts. We find 53 companions, 43 of which are new discoveries. We detail the Robo-AO survey data reduction methods including a method of using the large ensemble of target observations as mutual point-spread-function references, along with a new automated companion-detection algorithm designed for large adaptive optics surveys. Our survey is sensitive to objects from ?0.''15 to 2.''5 separation, with magnitude differences up to ?m ? 6. We measure an overall nearby-star probability for Kepler planet candidates of 7.4% ± 1.0%, and calculate the effects of each detected nearby star on the Kepler-measured planetary radius. We discuss several Kepler Objects of Interest (KOIs) of particular interest, including KOI-191 and KOI-1151, which are both multi-planet systems with detected stellar companions whose unusual planetary system architecture might be best explained if they are 'coincident multiple' systems, with several transiting planets shared between the two stars. Finally, we find 98% confidence evidence that short-period giant planets are two to three times more likely than longer-period planets to be found in wide stellar binaries.

  3. Using the vector vortex coronagraph in the ExAO regime at Palomar: lessons learned

    NASA Astrophysics Data System (ADS)

    Mawet, D.; Serabyn, E.; Burruss, R.

    2010-10-01

    We have been using the vector vortex coronagraph intensively on sky behind the 1.5-meter well-corrected subaperture on the 5-m Hale telescope at the Palomar observatory. This configuration allowed us to experiment the use of this small inner working angle, high throughput, clear and symmetric off-axis discovery space coronagraph in the ExAO regime. We will discuss the system level issues we had to tackle to make the most of this instrumental setup: low-frequency and high frequency pointing stabilization, focus removal, non-common path wavefront errors calibrations using the modified Gerchberg-Saxton phase retrieval technique, synchronized observing strategy. Without the availability of differential imaging capabilities such as angular or spectral differential imaging, we had to rely on the well-proven reference star subtraction. While not ideal, this method will be the only way to get to close separations since both ADI and SDI fail at very small angles. Fast and reproducible AO target acquisition allowed us to implement an efficient target-reference nodding method which is the key to achieving a high degree of correlation in the quasi-static speckle pattern required by smart data processing methods such as the locally optimized combination of images (LOCI).

  4. Correlation effects on the different crystal structures of AO2 (A=Na, K, and Ba)

    NASA Astrophysics Data System (ADS)

    Kim, Minjae; Kang, Chang-Jong; Min, B. I.

    2013-03-01

    In alkali superoxide (A=Na, and K), the structural phase transition from high symmetry to low symmetry structures occurs upon cooling. On the other hand, in BaO2 peroxide, the crystal structure is always the high symmetry tetragonal structure of KO2, independent of temperature. To resolve these different crystal structures of AO2 (A=Na, K, and Ba), we have calculated phonon dispersions of AO2, assuming the high symmetry tetragonal structure of KO2 with first-principle band structure method in the generalized gradient approximation (GGA) incorporating the Coulomb interaction U (GGA+U). From softened phonon modes, we have shown that, in KO2 and NaO2, the degeneracy of the incomplete pi anti-bonding level is lifted with the symmetry lowering such as Jahn-Teller effect with help of Coulomb correlation U. In contrast, in BaO2, the pi anti-bonding level of the peroxide is completely filled without degeneracy. Thus, U is not effective on the phonon structure so that the structural instability does not occur in BaO2.

  5. LDEF (Prelaunch), AO076 : Cascade Variable-Conductance Heat Pipe, Tray F09

    NASA Technical Reports Server (NTRS)

    1983-01-01

    LDEF (Prelaunch), AO076 : Cascade Variable-Conductance Heat Pipe, Tray F09 EL-1994-00302 LDEF (Prelaunch), AO076 : Cascade Variable-Conductance Heat Pipe, Tray F09 The prelaunch photograph was taken in SAEF II at KSC prior to installation of the Cascade Variable Conductance Heat Pipe Experiment (CVCHPE) on the LDEF. The Cascade Variable Conductance Heat Pipe Experiment (CVCHPE) occupies a 6 inch deep LDEF peripheral experiment tray and consist of two series connected variable conductance heatpipes, a black chrome solar collector panel and a silvered TEFLON® radiator panel, a power source to support six thermistor-type temperature monitoring sensors and actuations of two valves. Fiberglass standoffs and internal insulation blankets thermally isolated the experiment from the experiment tray and the LDEF interior. The outside of the CVCHPE, except the collector and radiator panels, was covered with an aluminumized Kapton multilayer insulation (MLI) blanket with an outer layer of 0.076 mm thick Kapton. The two patches of thin film materials, part of Experiment S1001 by NASA GSFC, were attached to the cover of the external thermal blanket with Kapton tape. The experiment was assembled and mounted in the experiment tray with non-magnetic stainless steel fasteners.

  6. Presseinformationen und Pressefotos der Universitt Salzburg -Bro fr Public Relations

    E-print Network

    Gruber, Peter M.

    . Foto: Hellekalek Universitätsprofessor Dr. phil. Dr. h.c.mult. Peter M. Gruber Universitätsprofessor. Gruber, Univ.-Prof. Dipl.-Ing. DDr. Christian Buchta, Foto: Hellekalek V.l.n.r.: Ao.Univ.-Prof. i.-Prof. Dipl.-Ing. DDr. Christian Buchta, Univ.-Prof. Dr. Dr.h.c. Jörg Wills, Foto: Hellekalek #12;

  7. Evaluating the Reliability and Reproducibility of the AO and Lauge-Hansen Classification Systems for Ankle Injuries.

    PubMed

    Yin, Meng-Chen; Yuan, Xue-Fei; Ma, Jun-Ming; Xia, Ye; Wang, Tao; Xu, Xiao-Li; Yan, Yin-Jie; Xu, Jin-Hai; Ye, Jie; Tong, Zheng-Yi; Feng, Yan-Qi; Wang, Hong-Bo; Wu, Xue-Qun; Mo, Wen

    2015-07-01

    Ankle injuries are responsible for more than 5 million emergency department visits each year. The AO and Lauge-Hansen classification systems are widely used in the clinical diagnosis of ankle injuries. This study aimed to analyze the intraobserver reliability and interobserver reproducibility of the AO and Lauge-Hansen classification systems. In addition, the authors explored the differences among physicians' classification responses and evaluated the clinical value for diagnosis. Fifty-six patients with an ankle injury with complete clinical and radiologic data were enrolled. The definition of injury type, the index score typing methods, and the specific study criteria were explained in detail. Five observers, who were orthopedic surgeons, determined the classifications according to both the AO and Lauge-Hansen systems. The classification was repeated 1 month later. Cronbach's alpha and Cohen's kappa test were used to determine interobserver reliability and intraobserver reproducibility. The physicians conducted 560 classifications (56 cases × 5 physicians × 2 times per patient). Average inter- and intraobserver kappa values for the AO system were 0.708 and 0.608, respectively. Average inter- and intraobserver kappa values for the Lauge-Hansen system were 0.402 and 0.398, respectively. Cronbach's alpha coefficient was 96.7% for the AO system and 76.0% for the Lauge-Hansen system. The Lauge-Hansen classification system is a comprehensive yet cumbersome system. Comparatively, the AO classification system is easier to understand. This study shows that the AO classification system has more reliability and reproducibility, and thus has more value in clinical practice, than the Lauge-Hansen classification system. PMID:26186326

  8. The MeJA-inducible copper amine oxidase AtAO1 is expressed in xylem tissue and guard cells.

    PubMed

    Ghuge, Sandip A; Carucci, Andrea; Rodrigues-Pousada, Renato A; Tisi, Alessandra; Franchi, Stefano; Tavladoraki, Paraskevi; Angelini, Riccardo; Cona, Alessandra

    2015-10-01

    Copper amine oxidases oxidize the polyamine putrescine to 4-aminobutanal with the production of the plant signal molecule hydrogen peroxide (H2O2) and ammonia. The Arabidopsis (Arabidopsis thaliana) gene At4g14940 (AtAO1, previously referred to as ATAO1) encodes an apoplastic copper amine oxidase expressed in lateral root cap cells and developing xylem, especially in root protoxylem and metaxylem precursors. In our recent study, we demonstrated that AtAO1 expression is strongly induced in the root vascular tissues by the wound-signal hormone methyl jasmonate (MeJA). Furthermore, we also demonstrated that the H2O2 derived by the AtAO1-driven oxidation of putrescine, mediates the MeJA-induced early protoxylem differentiation in Arabidopsis roots. H2O2 may contribute to protoxylem differentiation by signaling developmental cell death and by acting as co-substrate in peroxidase-mediated cell wall stiffening and lignin polymerization. Here, by the means of AtAO1 promoter::green fluorescent protein-?-glucuronidase (AtAO1::GFP-GUS) fusion analysis, we show that a strong AtAO1 gene expression occurs also in guard cells of leaves and flowers. The high expression levels of AtAO1 in tissues or cell types regulating water supply and water loss may suggest a role of the encoded protein in water balance homeostasis, by modulating coordinated adjustments in anatomical and functional features of xylem tissue and guard cells during acclimation to adverse environmental conditions. PMID:26241131

  9. Functional expression of amine oxidase from Aspergillus niger (AO-I) in Saccharomyces cerevisiae.

    PubMed

    Kolaríková, Katerina; Galuszka, Petr; Sedlárová, Iva; Sebela, Marek; Frébort, Ivo

    2009-01-01

    The aim of this work was to prepare recombinant amine oxidase from Aspergillus niger after overexpressing in yeast. The yeast expression vector pDR197 that includes a constitutive PMA1 promoter was used for the expression in Saccharomyces cerevisiae. Recombinant amine oxidase was extracted from the growth medium of the yeast, purified to homogeneity and identified by activity assay and MALDI-TOF peptide mass fingerprinting. Similarity search in the newly published A. niger genome identified six genes coding for copper amine oxidase, two of them corresponding to the previously described enzymes AO-I a methylamine oxidase and three other genes coding for FAD amine oxidases. Thus, A. niger possesses an enormous metabolic gear to grow on amine compounds and thus support its saprophytic lifestyle. PMID:17899443

  10. LDEF (Postflight), AO187-02 : Chemical and Isotropic Measurements of Micrometeoroids by Secondary Io

    NASA Technical Reports Server (NTRS)

    1990-01-01

    LDEF (Postflight), AO187-02 : Chemical and Isotropic Measurements of Micrometeoroids by Secondary Ion Mass Spectrometry, Tray E08 This postflight photograph shows an experiment that has been severely degraded due to orbital exposure on the leading edge of the LDEF. The metallic coated thin Mylar film has been lost on each of the capture cells. As the thin Mylar film failed, the material curled tightly into small conical shapes and can be seen still attached to the aluminum mounting structure edges of many capture cells. Close examination of capture cells near the tray center clearly show the four individual high purity germanium plates with some of the bonding material exposed between plates. The green tint on the germanium plate at the right edge of the experiment tray is a reflection from the lights in the high bay area of SAEF II at KFC. Dim reflections from various sources can be seen on other sections of the experiment.

  11. Optical observations of the outburst of blazar AO 0235+16

    NASA Astrophysics Data System (ADS)

    Balonek, T. J.; Lam, M. T.

    2008-09-01

    Observations at the Colgate University Foggy Bottom Observatory confirm the spectacular nature of the current optical outburst in the blazar AO 0235+16 reported by Villata et al (ATEL #1724). The blazar has reached a brightness level, R ~ 14.1, comparable to outbursts in 1990-91, 1992, 1998, and 2007. Preliminary reductions of CCD images indicate the blazar was at R ~ 16.2 on September 4.2 (UT), R ~ 15.4 on September 20.2 - observations hindered by the close proximity of the Moon, R ~ 15.0 on September 21.2, R ~ 14.2 on September 23.2, and R ~ 14.1 on September 24.2.

  12. LDEF (Postflight), AO139A : Growth of Crystals From Solutions in Low Gravity, Tray G06

    NASA Technical Reports Server (NTRS)

    1990-01-01

    LDEF (Postflight), AO139A : Growth of Crystals From Solutions in Low Gravity, Tray G06 The postflight photograph was taken in the SAEF II at KSC after the experiment tray was removed from the LDEF. The experiment tray flanges have become discolored with a light tan stain except where the tray clamp blocks were located. A darker stain appears to exist at the intersection of the white cover plate and the upper left flange of the experiment tray. The Crystal Growth experiment appears to have survived the extended mission with no visible damage. The experiment cover plate, originally white, appears to be discolored by a very light brown stain but is intact and securely in place.

  13. Analysis of Optical Variations of BL Lac Object AO 0235+164

    NASA Astrophysics Data System (ADS)

    Hong-tao, Wang

    2014-03-01

    Historical optical BVRI band data are combined on the BL Lac object AO 0235 + 164. In order to examine the possible existence of lags and correlations between variations in different optical bands from this source, a statistical analysis is performed through the Discrete Correlation Function (DCF) method. Monte Carlo simulations called Flux Redistribution/Random Subset Selection (FR/RSS) are performed to obtain statistically meaningful values for the cross-correlation time lags and their related uncertainties. The analysis confirms that the variations in different optical light curves are strongly correlated, with no or very weak lag within the errors. Long term variability of color indices are also analysed. No color variabilities are found.

  14. A History of Correlations Between Optical and Radio Outbursts in the Blazar AO 0235+164

    NASA Astrophysics Data System (ADS)

    McGrath, E. J.; Balonek, T. J.; Brandt, T. J.

    2000-05-01

    We present a ten year optical light curve for the blazar AO 0235+164 from 1989 through mid-1999. Observations were conducted at the Foggy Bottom Observatory at Colgate University using a sixteen inch Cassegrain telescope and CCD camera. Herein we note the correlations between optical and radio variations (radio observations obtained at the University of Michigan Radio Astronomy Observatory, UMRAO). MacLeod, Andrew, and Harvey (1976); Ledden, Aller, and Dent (1976); and Rieke et al. (1976) first noted a correlation between the optical and radio variations in a 1975 outburst of AO 0235+164. Balonek and Dent (1980) showed a second correlation in a 1979 outburst. Subsequent optical outbursts and further optical-radio correlations have been studied by several authors. We study the long and short time scale variations in four additional optical outbursts in 1990, 1991, 1992, and 1998. We find that some of the bursts appear to be strongly correlated with radio bursts, while others do not exhibit simple correlations. Different physical phenomena may be needed in order to explain the differences in these outbursts. In the correlated cases, the optical burst appears to either nearly coincide with a radio burst, or precede a subsequent radio burst by a few months. The time scales of the outbursts agree with the generally accepted model of Blandford and Konigl (1979) of a relativistic shock propagating down a jet. In addition, intra-night variability is seen during these outbursts on much shorter time scales and is most likely caused by another phenomenon.

  15. GOALS, STRATEGIES AND FIRST DISCOVERIES OF AO327, THE ARECIBO ALL-SKY 327 MHz DRIFT PULSAR SURVEY

    SciTech Connect

    Deneva, J. S.; Stovall, K.; Martinez, J. G.; Jenet, F.; McLaughlin, M. A.; Bates, S. D.; Bagchi, M.; Freire, P. C. C.

    2013-09-20

    We report initial results from AO327, a drift survey for pulsars with the Arecibo telescope at 327 MHz. The first phase of AO327 will cover the sky at declinations of –1° to 28°, excluding the region within 5° of the Galactic plane, where high scattering and dispersion make low-frequency surveys sub-optimal. We record data from a 57 MHz bandwidth with 1024 channels and 125 ?s sampling time. The 60 s transit time through the AO327 beam means that the survey is sensitive to very tight relativistic binaries even with no acceleration searches. To date we have detected 44 known pulsars with periods ranging from 3 ms to 2.21 s and discovered 24 new pulsars. The new discoveries include 3 ms pulsars, three objects with periods of a few tens of milliseconds typical of young as well as mildly recycled pulsars, a nuller, and a rotating radio transient. Five of the new discoveries are in binary systems. The second phase of AO327 will cover the sky at declinations of 28°-38°. We compare the sensitivity and search volume of AO327 to the Green Bank North Celestial Cap survey and the GBT350 drift survey, both of which operate at 350 MHz.

  16. Comparative analysis of the main bioactive components of San-ao decoction and its series of formulations.

    PubMed

    Shu, Xiaoyun; Tang, Yuping; Jiang, Chenxue; Shang, Erxing; Fan, Xinshen; Ding, Anwei

    2012-01-01

    A high performance liquid chromatographic (HPLC) method with diode array detection (DAD) was established for simultaneous determination of seven main bioactive components in San-ao decoction and its series of formulae (San-ao decoction, Wu-ao decoction, Qi-ao decoction and Jia-wei San-ao decoction). Seven compounds were analyzed simultaneously with a XTerra C(18) column (4.6 mm × 250 mm, 5 µm) using a linear gradient elution of a mobile phase containing acetonitrile (A) and a buffer solution (0.02 mol/L potassium dihydrogen phosphate and adjusted to pH 3 using phosphoric acid) (B); the flow rate was 1.0 mL/min. The sample was detected with DAD at 210, 254 and 360 nm and the column was maintained at 30 °C. All the compounds showed good linearity (r2 > 0.9984) in the tested concentration range. The precisions were evaluated by intra-day and inter-day tests, and relative standard deviation (R.S.D.) values within the range of 0.83%–2.53% and 0.64%–2.77% were reported, respectively. The recoveries of the quantified compounds were observed to cover a range from 95.34% and 104.82% with R.S.D. values less than 2.72%. The validated method was successfully applied for the simultaneous determination of seven main bioactive components including ephedrine (1), amygdalin (2), liquiritin (3), benzoic acid (4), isoliquiritin (5), formononetin (6) and glycyrrhizic acid (7) in San-ao decoction and its series of formulae. The results also showed a wide variation in the content of the identified active compounds in these samples, which could also be helpful to illustrate the drug interactions after some herbs combined in different formulations. PMID:23117432

  17. Interannual variations of the blocking high over the Ural Mountains and its association with the AO/NAO in boreal winter

    NASA Astrophysics Data System (ADS)

    Li, Chao; Zhang, Qingyun; Ji, Liren; Peng, Jingbei

    2012-04-01

    This paper analyzes interannual variations of the blocking high over the Ural Mountains in the boreal winter and their association with the Arctic Oscillation/North Atlantic Oscillation (AO/NAO). In January, the relationship between the Ural blocking high (UR) and the AO index is statistically significant. The UR tends to occur more frequently and with greater strength during negative AO periods. Some strong URs also occur during positive AO phases (positive UR-AO events), as in January 2008. This paper discusses the characteristics of atmospheric circulation in the cases of positive UR-AO events and contrast cases (negative UR-AO events). The eastward extending of the Icelandic Low (IL) center and the associated NAO dipole anomaly pattern in the upstream region may play a more important role for the UR-AO events. When the center of the IL shifts eastward to 30°W, the amplitude of zonal wavenumber 2 (wavenumber 3) is intensified in the positive (negative) UR-AO events, which favors positive (negative) height anomalies over the Urals. Further analyses indicate that the intensified zonal wind in high latitudes and weakened zonal wind in midlatitudes over the North Atlantic Ocean render the eastward shift of the IL and the NAO dipole anomaly pattern. The Ural blocking in January 2008 bears similar characteristics to the positive UR-AO events.

  18. The Early Cretaceous evolution of SE China: Insights from the Changle-Nan'ao Metamorphic Belt

    NASA Astrophysics Data System (ADS)

    Li, Ye; Ma, Chang-Qian; Xing, Guang-Fu; Zhou, Han-Wen

    2015-08-01

    The Mesozoic geology in SE China is characterized by widespread Jurassic-Cretaceous magmatism. There appears, however, an episode of "magmatic quiescence" at ca. 130-110 Ma in terms of increasing high-precision isotopic age data. The causes and regional tectonic significance of this magmatic quiescence are unclear. In this paper, we report integrated in situ U-Pb, Hf and O isotope analyses of zircons from four mica schist samples along Changle-Nan'ao Metamorphic Belt in SE China coast, and use these data to discuss the provenances of these metasedimentary rocks, the timing of the regional metamorphism and their implications for the regional tectonic evolution. The majority of zircons from the mica schists are euhedral to anhedral crystals showing clear concentric zoning under cathodoluminescence (CL) images. Metamorphic zircon rims with bright luminescence are overgrown on the some of the euhedral to anhedral zoned zircons. The zoned zircons from all mica schist samples are homogeneous in U-Pb age zircon ages (between 131 and 148 Ma, peaking at 141 Ma), O isotopes (?18O = 5.6 ± 0.8‰, 2SD, n = 106), and, to the less extent, Hf isotopes (?Hf(T) = - 4.7 to - 1.4 for the Dongshan mica schists, and - 1.4 to 2.2 for the Putian mica schists). They are most likely detrital zircons sourced from the regional Early Cretaceous felsic volcanic rocks (the Nanyuan Formation) and/or coeval intrusions in Fujian Province. The sedimentary protoliths of these mica schists were likely deposited in fore-arc basins. The metamorphic zircon overgrowths have relatively low Th/U ratios; they are dated at ~ 130-100 Ma, with two peaks at ~ 125 Ma and ~ 108 Ma. The first metamorphic age of ~ 125 Ma is coincident with the timing of regional Early Cretaceous magmatic quiescence, while the second metamorphic age of ~ 108 Ma is consistent with the timing of reinitiation of regional Cretaceous magmatism. We use a model of collision between the West Philippines and SE China blocks to interpret our new results. According to this model, the intensive Early Cretaceous (ca. 140-130 Ma) magmatism along the coastal region of SE China was attributed to the subduction of the Paleo-Pacific plate beneath SE China. Collision between the West Philippines and SE China blocks at ~ 130-120 Ma resulted in the regional "magmatic quiescence" and formation of the Changle-Nan'ao Metamorphic Belt. Post-collisional extension triggered the reinitiation of magmatism associated with amphibolite-facies metamorphism at ~ 110 Ma.

  19. The AOLI Non-Linear Curvature Wavefront Sensor: High sensitivity reconstruction for low-order AO

    NASA Astrophysics Data System (ADS)

    Crass, Jonathan; King, David; Mackay, Craig

    2013-12-01

    Many adaptive optics (AO) systems in use today require bright reference objects to determine the effects of atmospheric distortions on incoming wavefronts. This requirement is because Shack Hartmann wavefront sensors (SHWFS) distribute incoming light from reference objects into a large number of sub-apertures. Bright natural reference objects occur infrequently across the sky leading to the use of laser guide stars which add complexity to wavefront measurement systems. The non-linear curvature wavefront sensor as described by Guyon et al. has been shown to offer a significant increase in sensitivity when compared to a SHWFS. This facilitates much greater sky coverage using natural guide stars alone. This paper describes the current status of the non-linear curvature wavefront sensor being developed as part of an adaptive optics system for the Adaptive Optics Lucky Imager (AOLI) project. The sensor comprises two photon-counting EMCCD detectors from E2V Technologies, recording intensity at four near-pupil planes. These images are used with a reconstruction algorithm to determine the phase correction to be applied by an ALPAO 241-element deformable mirror. The overall system is intended to provide low-order correction for a Lucky Imaging based multi CCD imaging camera. We present the current optical design of the instrument including methods to minimise inherent optical effects, principally chromaticity. Wavefront reconstruction methods are discussed and strategies for their optimisation to run at the required real-time speeds are introduced. Finally, we discuss laboratory work with a demonstrator setup of the system.

  20. Pt-TiO2/graphene photocatalysts for degradation of AO7 dye under visible light

    NASA Astrophysics Data System (ADS)

    Hsieh, S. H.; Chen, W. J.; Wu, C. T.

    2015-06-01

    In this work, the hydrothermal method was used for synthesizing Pt-TiO2/graphene nanocomposites. Obtained Pt-TiO2/graphene photocatalysts were characterized by Raman spectroscopy, X-ray diffraction analysis (XRD), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), Fourier transform infrared (FTIR) spectroscopy, photoluminescence spectroscopy, and UV-vis spectroscopy. The photocatalytic activity of the Pt-TiO2/graphene nanocomposite catalyst was assessed by examining the degradation of acid orange 7 (AO7) dye from aqueous solutions as a probe reaction under solar light irradiations. X-ray photoelectron spectroscopy analyses showed that the Pt ions substituted in the TiO2 lattice were present mainly in the Pt(II) state. Pt-TiO2/graphene exhibited higher photocatalytic activities than TiO2/graphene under visible light irradiation. The visible light activity of Pt-TiO2/graphene was strongly affected by the calcination temperature and the amounts of H2PtCl6, which were optimal at 500 °C and 10% H2PtCl6, respectively. The degradation efficiency of the Pt-TiO2/graphene nanocomposite was 99% after 6 h of visible light irradiation. The enhanced photodegradation activity might be mainly attributed to the role of Pt-TiO2 as a charge generating center and graphene played as electron acceptor and transporter in the nanocomposite, which effectively suppressed the charge recombination and promoted the charge transfer within the composite.

  1. The Robo-AO KOI Survey: Laser Adaptive Optics Imaging of Every Kepler Exoplanet Candidate

    NASA Astrophysics Data System (ADS)

    Ziegler, Carl; Law, Nicholas M.; Baranec, Christoph; Morton, Tim; Riddle, Reed L.

    2016-01-01

    The Robo-AO Kepler Planetary Candidate Survey is observing every Kepler planet candidate host star (KOI) with laser adaptive optics imaging to hunt for blended nearby stars which may be physically associated companions. With the unparalleled efficiency provided by the first fully robotic adaptive optics system, we perform the critical search for nearby stars (0.15" to 4.0" separation with contrasts up to 6 magnitudes) that pollute the observed planetary transit signal, contributing to inaccurate planetary characteristics or astrophysical false positives. We present approximately 3300 high resolution observations of Kepler planetary hosts from 2012-2015, with ~500 observed nearby stars. We measure an overall nearby star probability rate of 16.2±0.8%. With this large dataset, we are uniquely able to explore broad correlations between multiple star systems and the properties of the planets which they host. We then use these clues for insight into the formation and evolution of these exotic systems. Several KOIs of particular interest will be discussed, including possible quadruple star systems hosting planets and updated properties for possible rocky planets orbiting in the habitable zone.

  2. LDEF (Postflight), AO175 : Evaluation of Long-Duration Exposure to the Natural Space Environment on

    NASA Technical Reports Server (NTRS)

    1990-01-01

    LDEF (Postflight), AO175 : Evaluation of Long-Duration Exposure to the Natural Space Environment on Graphite-Polyimide and Graphite-Epoxy Mechanical Properties, Tray A01 The Graphite-Polyimide and Graphite-Epoxy Mechanical Properties experiment postflight photograph was taken in the Orbiter Processing Facility during the period when the LDEF was being transferred from the Orbiter cargo bay to the KSC Payload Transporter. The photograph shows considerably more detail than the flight photograph. The horizontal lines on the honeycomb panel that appear to be cracks from space exposure are instead fine lines of excess epoxy resin formed during the bagging and curing process. The harsh white color of the epoxy adhesive along the rivet lines is from the lighting conditions in the OPF. The brown discoloration on the paint dots and the stain on the aluminum mounting strips appear to have changed little from the flight photograph. The greater detail does show that a stain exists at most composite and mounting strip interfaces.

  3. Characterization, Expression Profile, and Promoter Analysis of the Rhodeus uyekii Vitellogenin Ao1 Gene

    PubMed Central

    Kong, Hee Jeong; Kim, Ju Lan; Moon, Ji Young; Kim, Woo-Jin; Kim, Hyung Soo; Park, Jung Youn; Cho, Hyun Kook; An, Cheul Min

    2014-01-01

    The fish Vitellogenin (Vg) gene has been applied as a biomarker for exposure to estrogenic compounds in the aquatic environment. In this study, we cloned and characterized Vg cDNA from the Korean rose bitterling Rhodeus uyekii (Ru-Vg). The Ru-Vg cDNA encodes a 1424-amino-acid polypeptide that belongs to the VgAo1 family and contains a putative signal peptide, lipovitellin I, phosvitin, and lipovitellin II, but does not contain the vWFD domain or the C-terminal peptide. The deduced Ru-Vg protein has high amino acid identity (73.97%–32.17%) with fish Vg proteins. Pairwise alignment and phylogenetic analysis revealed that Ru-Vg is most closely related to Acheilognathus yamatsutae Vg. Ru-Vg transcripts were detected using quantitative polymerase chain reaction in all tissues tested, with the highest level of expression observed in the ovary. Ru-Vg mRNA was upregulated in R. uyekii hepatopancreas cells in response to treatment with 17?-estradiol (E2) or 17?-ethinylestradiol (EE2). Luciferase reporter expression, driven by the 5'-regulatory region of the Ru-Vg gene spanning from ?1020 bp to the start codon was induced by the estrogen receptor and was synergistically activated by treatment with E2 or EE2. These results suggest that R. uyekii and the Ru-Vg gene may be useful as biomarkers for exposure to E2 or EE2. PMID:25329620

  4. LDEF (Prelaunch), AO015 : Free-Flyer Biostack Experiment, Tray G02

    NASA Technical Reports Server (NTRS)

    1984-01-01

    LDEF (Prelaunch), AO015 : Free-Flyer Biostack Experiment, Tray G02 The prelaunch photograph shows the Bio stack experiment containers mounted on a baseplate and installed in a six (6) inch deep LDEF end corner experiment tray. Non-magnetic stainless steel fasteners were used in all mechanical joint assemblies. The Biostack experiment consist of twenty (20) detector units in hermetically sealed aluminum housings mounted on aluminum baseplates. Eight (8) detector units are mounted on a baseplate and installed in a six (6) inch peripheral tray adjacent to the LDEF trailing edge and twelve (12) detector units mounted on a baseplate are located in the tray shown and will be installed on the earth facing end of the LDEF. The experiment housings and the mounting plate have a thin chro mic anodize surface coating to meet thermal requirements. Two (2) housings have windows cov ered with Kapton H foil that provides a light filter with low radiation absorption. Two (2) additional housings have windows covered with Kapton H foil but also have perforated aluminum domes to limit incoming earth albedo.

  5. Control Performance Issues in a Binocular Active Vision System Jo~ao P. A. Barreto Paulo Peixoto

    E-print Network

    Barreto, Joao

    Control Performance Issues in a Binocular Active Vision System Jo~ao P. A. Barreto Paulo Peixoto PORTUGAL PORTUGAL Abstract The performance of a binocular active vision sys- tem depends mainly on two of smooth pursuit. This sys- tem is used to track binocularly targets in a surveil- lance environment. One

  6. Effect of misalignment of air-coupled probes on Ao Lamb mode propagating in a metal plate.

    PubMed

    Ramadas, C; Hood, Avinash; Khan, Irfan; Balasubramaniam, Krishnan

    2014-07-01

    Proper alignment of air-coupled ultrasonic transducers for generation and reception of Lamb waves is vital in order to acquire a high amplitude wave group. Any misalignment with either the transmitter or the receiver or both adversely influences the amplitude of a Lamb mode. This paper reports a systematic attempt to quantify the reduction in the amplitude of the fundamental anti-symmetric Lamb mode (Ao) in a metal plate caused by misalignments in air-coupled probes. Three different types of misalignments - linear, orientation and synchronised orientation were deliberately introduced in the transducers, and experiments were performed on a 6mm thick aluminium plate. Amplitudes of Ao mode measured at various configurations were normalised with that of Ao mode, captured in a reference configuration. Suitable curves fitted over the experimental data points revealed that Gaussian curves represent appropriately the variations in normalised amplitudes of Ao mode. Moreover, analytical expressions were derived to predict the difference in arrival times of Lamb mode(s) due to orientation and synchronised orientation misalignments. PMID:24630155

  7. DE LUXOSo bem pagos, podem incluir viagens ao estrangeiro e a taxa de contratao, no final, aproxima-se

    E-print Network

    Instituto de Sistemas e Robotica

    talento»? POR VÂNIA MAIA TEXTO LUIS BARRA FOTOS E difícil tirar o sorriso do ros- to de Inês Arnauth, 24, especialista em recursos humanos da Stan- ton Chase Portugal. Ao mesmo tempo que aprendiam mais sobre o negócio fui escolhida, é porque sou capaz.» Mimar o talento 0 CURRÍCULO DA ELITE Os estágios de trainee não

  8. Ionic Polymer-Coated Laccase with High Activity and Enhanced Stability: Application in the Decolourisation of Water Containing AO7

    PubMed Central

    Zhang, Xiaolin; Hua, Ming; Lv, Lu; Pan, Bingcai

    2015-01-01

    Eliminating dyes in environmental water purification remains a formidable challenge. Laccase is a unique, environmentally friendly and efficient biocatalyst that can degrade pollutants. However, the use of laccase for the degradation of pollutants is considerably limited by its susceptibility to environmental changes and its poor reusability. We fabricated a novel biocatalyst (LacPG) by coating polyethylenimine onto the native laccase (Lac) followed by crosslinking with glutaraldehyde. The stability of the resulting LacPG was highly enhanced against pH variations, thermal treatments and provided better long-term storage with a negligible loss in enzymatic activity. Compared to Lac, LacPG exhibited significantly higher decolourisation efficiency in the degradation of a representative azo dye, acid orange 7 (AO7), which resulted from the electrostatic attraction between the coating and AO7. LacPG was separated from the AO7 solution using an ultrafiltration unit. The increased size and modified surface chemistry of LacPG facilitated ultrafiltration and reduced membrane fouling. LacPG exhibited enhanced stability, high catalytic activity and favourable properties for membrane separation; therefore, LacPG could be continuously reused in an enzymatic membrane reactor with a high efficiency for decolourising water containing AO7. The developed strategy appears to be promising for enhancing the applicability of laccase in practical water treatment. PMID:25652843

  9. ON NON-NEWTONIAN p-FLUIDS. THE PSEUDO-PLASTIC by H. Beir~ao da Veiga

    E-print Network

    Lisbon, University of

    , and that this boundary is nearly always present in realistic problems. The cases p > 2 and p shear thickening to the boundary, in the shear thickening (or dilatant) case we refer to [14], [1], [2] and [4]. In the followingON NON-NEWTONIAN p-FLUIDS. THE PSEUDO-PLASTIC CASE. by H. Beir~ao da Veiga November 6, 2007

  10. CF III.20 (b). Determine os subconjuntos de R onde convergem pontualmente ou uniformemente a sucess~ao fn(x) = e-n2

    E-print Network

    Granja, Gustavo

    ´ariamente para f|A. Vamos mostrar que tal acontece sse existe a > 0 tal que A ] - , -a] {0} [a, +[. (i escolhemos p N tal que e-p2 a2 Tal ´e poss´ivel1 porque, sendo a = 0, temos limk e-k2 a2 = 0. Ent~ao para que se n~ao existe a > 0 tal que A ] - , -a] {0} [a, +[ ent~ao fn n~ao converge uniformemente para f

  11. Revolutionary visible and infrared sensor detectors for the most advanced astronomical AO systems

    NASA Astrophysics Data System (ADS)

    Feautrier, Philippe; Gach, Jean-Luc; Guieu, Sylvain; Downing, Mark; Jorden, Paul; Rothman, Johan; de Borniol, Eric D.; Balard, Philippe; Stadler, Eric; Guillaume, Christian; Boutolleau, David; Coussement, Jérome; Kolb, Johann; Hubin, Norbert; Derelle, Sophie; Robert, Clélia; Tanchon, Julien; Trollier, Thierry; Ravex, Alain; Zins, Gérard; Kern, Pierre; Moulin, Thibaut; Rochat, Sylvain; Delpoulbé, Alain; Lebouqun, Jean-Baptiste

    2014-07-01

    We report in this paper decisive advance on the detector development for the astronomical applications that require very fast operation. Since the CCD220 and OCAM2 major success, new detector developments started in Europe either for visible and IR wavelengths. Funded by ESO and the FP7 Opticon European network, the NGSD CMOS device is fully dedicated to Natural and Laser Guide Star AO for the E-ELT with strong ESO involvement. The NGSD will be a 880x840 pixels CMOS detector with a readout noise of 3 e (goal 1e) at 700 Hz frame rate and providing digital outputs. A camera development, based on this CMOS device and also funded by the Opticon European network, is ongoing. Another major AO wavefront sensing detector development concerns IR detectors based on Avalanche Photodiode (e- APD) arrays within the RAPID project. Developed by the SOFRADIR and CEA/LETI manufacturers, the latter offers a 320x255 8 outputs 30 microns IR array, sensitive from 0.4 to 3 microns, with less than 2 e readout noise at 1600 fps. A rectangular window can also be programmed to speed up even more the frame rate when the full frame readout is not required. The high QE response, in the range of 70%, is almost flat over this wavelength range. Advanced packaging with miniature cryostat using pulse tube cryocoolers was developed in the frame of this programme in order to allow use on this detector in any type of environment. The characterization results of this device are presented here. Readout noise as low as 1.7 e at 1600 fps has been measured with a 3 microns wavelength cut-off chip and a multiplication gain of 14 obtained with a limited photodiode polarization of 8V. This device also exhibits excellent linearity, lower than 1%. The pulse tube cooling allows smart and easy cooling down to 55 K. Vibrations investigations using centroiding and FFT measurements were performed proving that the miniature pulse tube does not induce measurable vibrations to the optical bench, allowing use of this cooled device without liquid nitrogen in very demanding environmental conditions. A successful test of this device was performed on sky on the PIONIER 4 telescopes beam combiner on the VLTi at ESOParanal in June 2014. First Light Imaging, which will commercialize a camera system using also APD infrared arrays in its proprietary wavefront sensor camera platform. These programs are held with several partners, among them are the French astronomical laboratories (LAM, OHP, IPAG), the detector manufacturers (e2v technologies, Sofradir, CEA/LETI) and other partners (ESO, ONERA, IAC, GTC, First Light Imaging). Funding is: Opticon FP7 from European Commission, ESO, CNRS and Université de Provence, Sofradir, ONERA, CEA/LETI the French FUI (DGCIS), the FOCUS Labex and OSEO.

  12. LDEF (Postflight), AO076 : Cascade Variable-Conductance Heat Pipe, Tray F09

    NASA Technical Reports Server (NTRS)

    1990-01-01

    LDEF (Postflight), AO076 : Cascade Variable-Conductance Heat Pipe, Tray F09 EL-1994-00354 LDEF (Postflight), AO076 : Cascade Variable-Conductance Heat Pipe, Tray F09 The postflight photograph was taken in the SAEF II at KSC prior to removal of the experiment from the LDEF. The color of the white paint dots on the exper- iment tray clamp blocks appear to be unchanged. The LDEF structure, the intercostal on the right, has a dark brown discoloration adjacent to the black Earth end thermal panel. Aluminum pieces of the degraded CVCHPE thermal cover that were shown lodged in the vent area between the intercostal and the black thermal panel in the flight photograph are gone. The Cascade Variable Conductance Heat Pipe Experiment (CVCHPE) occupies a 6 inch deep LDEF peripheral experiment tray and consist of two series connected variable conductance heatpipes, a black chrome solar collector panel and a silvered TEFLON® radiator panel, a power source to support six thermistor-type temperature monitoring sensors and actuations of two valves. Fiberglass standoffs and internal insulation blankets thermally isolated the experiment from the experiment tray and the LDEF interior. The outside of the CVCHPE, except the collector and radiator panels, was covered with an aluminized Kapton multilayer insulation (MLI) blanket with an outer layer of 0.076 mm thick Kapton. The two patches of thin film materials, part of Experiment S1001 by NASA GSFC, were attached to the cover of the external thermal blanket with Kapton tape. The experiment was assembled and mounted in the experiment tray with non-magnetic stainless steel fasteners. The external surface of the CVCHPE has changed from that observed in the flight photograph. The thin vapor deposited aluminum coating, left after the Kapton eroded, is essentially gone with only fragments left near the edges of the thermal blanket. Pieces of a layer of Dacron mesh (bridle vail) material, used to separate the thermal cover from the thermal blanket and between thermal blanket sheets of aluminized Kapton, are visible along the edges of the blanket and near Kel-F buttons used to secure the blanket. A large fragment of the material is folded over the left side of the radiator panel. The large area of discoloration on the right side of the black solar absorber panel appears to be approximately the same shape as the aluminum coating that covered the area in the flight photograph. The orientation of the remaining thin film atomic oxygen experiment patch would indicate that the patch is attached to the Dacron mesh and that the attachment is very fragile. The layer of Kapton tape that covered the ends of the thin film strips appears to be eroded with only the adhesive remaining. The remaining strips of the atomic oxygen experiment materials have changed colors and most appear to be severely degraded. The silvered TEFLON® coating of the radiator panel appears diffuse with a light brown discoloration over most of the surface. The white, evenly spaced, discolorations along the horizontal centerline and along the edges of the panel appear to be above counter sunk flat head screws used to assemble the experiment. The black spots on the radiator panel appear to be impact craters that penetrated the TEFLON® material and exposed the silver beneath to the atomic oxygen flux. Particles of the degraded thermal blanket material that appeared to adhere to the surface of the radiator panel in the flight photograph are gone.

  13. LDEF (Flight), AO076 : Cascade Variable-Conductance Heat Pipe, Tray F09

    NASA Technical Reports Server (NTRS)

    1990-01-01

    LDEF (Flight), AO076 : Cascade Variable-Conductance Heat Pipe, Tray F09 EL-1994-00020 LDEF (Flight), AO076 : Cascade Variable-Conductance Heat Pipe, Tray F09 The flight photograph of the Cascade Variable Conductance Heat Pipe Experiment (CVCHPE) was taken while the LDEF was attached to the Orbiter's RMS arm prior to berthing in the Orbiter's cargo bay. The white paint dots on the center clamp blocks of the experiment trays right flange and lower flange appear to be slightly discolored. The LDEF structure, top intercostal, has a dark brown discoloration adjacent to the black thermal panel. Aluminum particles from the degraded CVCHPE thermal blanket are also visible in this area. The Cascade Variable Conductance Heat Pipe Experiment (CVCHPE) occupies a 6 inch deep LDEF peripheral experiment tray and consist of two series connected variable conductance heatpipes, a black chrome solar collector panel and a silvered TEFLON® radiator panel, a power source to support six thermistor-type temperature monitoring sensors and actuations of two valves. Fiberglass standoffs and internal insulation blankets thermally isolated the experiment from the experiment tray and the LDEF interior. The outside of the CVCHPE, except the collector and radiator panels, was covered with an aluminumized Kapton multilayer insulation (MLI) blanket with an outer layer of 0.076 mm thick Kapton. The two patches of thin film materials, part of an atomic oxygen experiment (see S1001) by NASA GSFC, were attached to the cover of the external thermal blanket with Kapton tape. The experiment was assembled and mounted in the experiment tray with non-magnetic stainless steel fasteners. The external CVCHPE materials have changed significantly. The Kapton on the thermal blanket aluminized Kapton cover appears to be completely eroded, except under Kel-F buttons used to secure the blanket, leaving only the very thin vapor deposited aluminum coating as a cover. Parts of the aluminum coating residue has moved to cover a portion of the black solar absorber panel and also areas of the trays upper and lower flanges. The shadow on the tray lower flange would indicate that the aluminum extends several inches out of the tray envelope. One of the two thin film atomic oxygen experiment patches is gone and the other does not appear to be securely attached. The layer of Kapton tape over the thin film strips appears to be eroded with only the adhesive remaining. The remaining atomic oxygen experiment materials have changed colors and most appear to be severely degraded. The silvered TEFLON® coating of the radiator panel appears diffuse with a light brown discoloration over most of the surface. The white, evenly spaced, discolorations along the vertical centerline and across the top of the panel appear to be above counter sunk flat head screws used to assemble the experiment. The black spots on the radiator panel appear to be impact craters where the impact penetrated the TEFLON® material and exposed the silver beneath to the atomic oxygen flux. Particles of the degraded thermal blanket material appear to be adhered to the surface of the radiator panel.

  14. Screw fixation of medial malleolar fractures: a cadaveric biomechanical study challenging the current AO philosophy.

    PubMed

    Parker, L; Garlick, N; McCarthy, I; Grechenig, S; Grechenig, W; Smitham, P

    2013-12-01

    The AO Foundation advocates the use of partially threaded lag screws in the fixation of fractures of the medial malleolus. However, their threads often bypass the radiodense physeal scar of the distal tibia, possibly failing to obtain more secure purchase and better compression of the fracture. We therefore hypothesised that the partially threaded screws commonly used to fix a medial malleolar fracture often provide suboptimal compression as a result of bypassing the physeal scar, and proposed that better compression of the fracture may be achieved with shorter partially threaded screws or fully threaded screws whose threads engage the physeal scar. We analysed compression at the fracture site in human cadaver medial malleoli treated with either 30 mm or 45 mm long partially threaded screws or 45 mm fully threaded screws. The median compression at the fracture site achieved with 30 mm partially threaded screws (0.95 kg/cm(2) (interquartile range (IQR) 0.8 to 1.2) and 45 mm fully threaded screws (1.0 kg/cm(2) (IQR 0.7 to 2.8)) was significantly higher than that achieved with 45 mm partially threaded screws (0.6 kg/cm(2) (IQR 0.2 to 0.9)) (p = 0.04 and p < 0.001, respectively). The fully threaded screws and the 30mm partially threaded screws were seen to engage the physeal scar under an image intensifier in each case. The results support the use of 30 mm partially threaded or 45 mm fully threaded screws that engage the physeal scar rather than longer partially threaded screws that do not. A 45 mm fully threaded screw may in practice offer additional benefit over 30 mm partially threaded screws in increasing the thread count in the denser paraphyseal region. PMID:24293597

  15. @~7AO@M7?8@8l%3%s%Q%$%i=hM7O$rMQ$$$?8E E5L?Bj@~7AO@M$NDjMZL@%7%9%F%`

    E-print Network

    Banbara, Mutsunori

    ][4][9][7] $,Ds0F$5$l$F$$$k!%$^$?!$D¿4Q¡g5A@~7AO@ M7?8@8lLolli $K$D$$$F$O!$Cx¡T$i$N3+H/$7$?%3%s%Q %$%i=hM7OLLP $K@~ 7AO@M7?8@8lLolli $N%W%m%0%i%`$KJQ49$7!$LLP %3%s %Q%$%i$rMQ$$$FCj¿]5!3#L?NaNs$KK]Lu$9$k$3$H$G!$8z NAO@M7?8@8l Lolli [8] $K$D$$$F=R$Y$k!% Forum $G$O%W%j%%F%#%V$JO@M1i;;;R$H$7$F, , , &, 1 , - A ($?$@$7

  16. ISRConnector In StI tute fo R So ftwaRe R e S e aR c h / unIve R S It y of c alIfoR nIa, IR vIne

    E-print Network

    Demsky, Brian

    in the Real World 8-ISR Events R e s e a R c h B R i e f s Director Richard n. taylor has been awarded-the-fly to perform collaborative data extraction and display on news feeds (Figure 1). ISR Director Richard n. taylorISRConnector In StI tute fo R So ftwaRe R e S e aR c h / unIve R S It y of c alIfoR nIa, IR v

  17. Hawaii Papa O Ke Ao -is the name chosen for this group tasked with developing a plan to make the University of

    E-print Network

    Hawaii Papa O Ke Ao -is the name chosen for this group tasked with developing a plan to make the University of Hawaii a leader in indigenous education. The phrase simply means Hawaii Foundations (Papa) and Wkea (reflected in his Ao form), the original parents of Hawaii Consciousness. #12; 1

  18. I Workshop de Tec. da Inf. Apl. ao Meio Ambiente -CBComp 2003 Sis. de Apoio Tomada de Deciso DESIGN DE UM SISTEMA DE SUPORTE DECISO BASEADO

    E-print Network

    Cengarle, María Victoria

    I Workshop de Tec. da Inf. Apl. ao Meio Ambiente - CBComp 2003 Sis. de Apoio à Tomada de Decisão Workshop de Tec. da Inf. Apl. ao Meio Ambiente - CBComp 2003 Sis. de Apoio à Tomada de Decisão 1895 de conhecimento com base em modelos fornecem meios para tornar disponível o conhecimento de

  19. Role of Radical Formation at Tyrosine 193 in the Allene Oxide Synthase Domain of a Lipoxygenase-AOS Fusion Protein from Coral

    E-print Network

    Ronquist, Fredrik

    Vised Manuscript ReceiVed April 3, 2003 ABSTRACT: Coral allene oxide synthase (cAOS), a fusion protein with 8RRole of Radical Formation at Tyrosine 193 in the Allene Oxide Synthase Domain of a Lipoxygenase-AOS Fusion Protein from Coral Fayi Wu, Leron J. Katsir, Margaret Seavy, and Betty J. Gaffney* Department

  20. Software Paradigmen Skriptum zur Lehrveranstaltung

    E-print Network

    Software Paradigmen Skriptum zur Lehrveranstaltung 2007 ­ 2013 Ersteller: Prof. DI Dr. Franz Wotawa Adaptiert und erweitert: Ao.Univ.-Prof. DI Dr. Bernhard Aichernig Prof. DI Dr. Alexander Felfernig--2013) ERSTELLER: PROF. DI DR. FRANZ WOTAWA ADAPTIERT UND ERWEITERT VON: AO.UNIV.-PROF. DI DR. BERNHARD AICHERNIG

  1. LDEF (Postflight), AO175 : Evaluation of Long-Duration Exposure to the Natural Space Environment on

    NASA Technical Reports Server (NTRS)

    1990-01-01

    LDEF (Postflight), AO175 : Evaluation of Long-Duration Exposure to the Natural Space Environment on Graphite-Polyimide and Graphite-Epoxy Mechanical Properties, Tray A07 The postflight photograph was taken in the Operations and Control (O&C) facility after the LDEF had been transferred from the KSC Payload Transporter to the LDEF Assembly and Transport System (LATS) and shows more detail than the flight photograph. The areas on the aluminum mounting strips where the coating has been scraped and/or abraided can be seen in greater detail under the better lighting conditions. The coating color remains essentially the same. The white paint dots on the tray clampblocks have changed little from the orginal color. PMR-15 Graphite-Polyimide Panel (precured) - The PMR-15 graphite-polyimide laminated panel (T40T30060-009) postflight photograph provides more detail than the flight photograph. The geometric pattern seen on the flight photograph is not visible, however, the horizontal lines, cracks and/or crazing, observed previously are better defined. A gray haze or dust appears to cover the gray/brown panel surface. The yellow colored identification numbers seem to be a little lighter than in the flight photograph but the white marking in the upper left corner do not appear to have changed. Scratch marks/abrasions on the lower left edge of panel were on prelaunch photographs. F-178/T300 Graphite-Polyimide Panel (cocured) - The 178/T300 graphite-polyimide panel (T40T30060-005) seems to have changed in color from the light gray in the flight photograph to a brownish gray. The yellow identification numbers seem lighter while the white marking in the upper left corner appear brighter. The fine horizontal lines, cracks and/or crazing, are still visible on the panel surface. F178/T300 Graphite-Polyimide Panel (precured) - The 178/T300 graphite-polyimide laminated panel (T40T30060-001) seems to have changed to a brownish gray from the light gray color seen in the flight photograph. The yellow identification numbers and the white marking seen on the lower right corner of the panel appear the same as in the flight photograph. The fine horizontal lines, cracks and/or crazing, are still visible on the panel surface.

  2. Future change of water vaiables from HadGEM2-AO simulation

    NASA Astrophysics Data System (ADS)

    Kim, Moon-Hyun; Kang, Hyun-Suk; Lee, Johan; Baek, Hee-Jeong; Cho, Chunho

    2013-04-01

    Complex global models developed for climate prediction are now applied to the future climate projection in a number of global modeling centers around the world. In climate prediction aspects, an atmosphere-ocean coupled model (one-tier climate system) has been recognized to exhibit useful skill for a global or certain regions (Graham et al., 2005). Wang et al. (2005) demonstrates that an AGCM coupled with an ocean model, simulates realistic SST-rainfall relationships for the Asia during the summer period. Also the transition from two-tier to one-tier approach in climate prediction are mainly caused by recent progresses in development of coupled climate models and enlargement of understanding air-sea interactions obtained from international collaborative efforts such as TOGA (the Tropical Ocean-Global Atmosphere) program (Wang et al., 2009). Meanwhile, water resource including river outflow in association with surface and sub-surface water flow is an important part of the global hydrological cycle, and is affected by climate variability and change through recharge processes (Chen et al., 2002), as well as by human interventions in many locations (Petheram et al., 2001). Also, water is critical resource to the social, economic and environmental aspects, and advances of these core elements requires improved water resource management. Better management and use of water need to abundant real time hydro-meteorological (river and weather) information as well as accurate water resource forecasting (Barrett, 1990). For this reason, many studies have recently carrying out the water resource prediction and estimation using hydrology and climate model. For example, Shiklomanov et al. (2011) predicted that water resource in Russian territory increases about 8-10% during 2010-2020 using the unit hydrograph (UH) model based on hydrologic rainfall-runoff model. Anderson et al. (2000) explained the probabilistic seasonal prediction of drought with a simplified climate model coupled hydrology-atmosphere for water resource planning. Arora et al. (1999) and Oki and Sud (1998) developed a method for routing river flows through GCM grid cells. Accordingly, reliable forecasts are expected to help water managers and users with long lead time decisions, leading to greater water use efficiency and better risk management (Wang, 2012). SO, we analysed hydrological cycle and drought index from precipitation, evaporation, runoff, soil moisture, river outflow, and so on using atmosphere-ocean coupled model which called by HadGEM2-AO. Details and added information by this climate projection system about the future water cycle's change will be presented at the workshop. Acknowledgments: This research has been supported by project NIMR-2013-B-2 of the National Institute of Meteorological Research in Korea Meteorological Administration.

  3. Knee Osteochondritis Dissecans Treated by the AO Hook Fixation System: A Four Year Follow-Up of an Alternative Technique

    PubMed Central

    Pengas, Ioannis P; Assiotis, Angelos; Kokkinakis, Michail; Khan, Wasim S; Meyers, Paul; Arbuthnot, James; Mcnicholas, Michael J

    2014-01-01

    Surgical fixation is recommended for stable osteochondritis dissecans (OCD) lesions that have failed nonoperative management and for all unstable lesions. In this study we set out to describe and evaluate an alternative method of surgical fixation for such lesions. Five knees with unstable OCD lesions in four male adolescent patients with open physes were treated with the AO Hook Fixation System. The outcome was evaluated both clinically and with three separate outcome systems (IKDC 2000, KOOS, Lysholm) at one and a mean four year follow-up. We demonstrated excellent clinical results in all patients. At four years, all scoring systems demonstrated statistically significant improvement when compared to the preoperative status. Our study suggests that the AO Hook Fixation System is an alternative method of surgical intervention with comparable medium term results with other existing modes of fixation and the added biomechanical advantage of the absence of distracting forces during hardware removal. PMID:25067976

  4. First light curve analyses of binary systems AO Aqr, CW Aqr and ASAS 012206-4924.7

    NASA Astrophysics Data System (ADS)

    Ula?, B.; Ulusoy, C.

    2015-11-01

    Using the data from the public database of the All Sky Automated Survey (ASAS) we performed the very first light curve analyses of the three eclipsing binary systems AO Aqr, CW Aqr and ASAS 012206-4924.7. The physical parameters of the systems were determined by the PHOEBE (Prša and Zwitter, 2005) software. From an analysis of the ASAS data it was concluded that AO Aqr was found to be a contact binary system while CW Aqr and ASAS 012206-4924.7 were found to be near-contact and detached binaries, respectively. Finally, the locations of the components, corresponding to the estimated physical parameters, in the HR diagram were also discussed.

  5. High energy resolution observation of the Crab and AO535 plus 26 in the hard X-ray range

    NASA Technical Reports Server (NTRS)

    Hameury, J. M.; Boclet, D.; Durouchoux, P.; Cline, T.; Teegarden, B.; Tueller, J.; Paciesas, W.; Haymes, R.

    1982-01-01

    A number of uncertainties exist currently regarding the existence of gamma-ray lines in the Crab spectrum. An investigation was, therefore, conducted, and the Crab was observed for eight hours during a balloon flight from Palestine, TX, on September 26, 1980. It appeared that the binary source AO535 plus 26 contaminated the Crab data. It was, however, possible to separate the two sources. The obtained results are discussed and evaluated. It is found that the possibility of a line at 73 keV with the intensity reported by Ling et al. (1979) can be excluded for the obtained data. The 400 keV line cannot be ruled out. The results concerning AO535 plus 26 are very different from those previously obtained.

  6. First Light Curve Analyses of Binary Systems AO Aqr, CW Aqr and ASAS 012206-4924.7

    E-print Network

    Ulas, Burak

    2015-01-01

    Using the data from the public database of the All Sky Automated Survey ({\\tt ASAS}) we performed the very first light curve analyses of the three eclipsing binary systems \\astrobj{AO~Aqr}, \\astrobj{CW~Aqr} and \\astrobj{ASAS~012206-4924.7}. The physical parameters of the systems were determined by the {\\tt PHOEBE} software. From an analysis of the ASAS data it was concluded that AO~Aqr was found to be a contact binary system while CW~Aqr and ASAS~012206-4924.7 were found to be near--contact and detached binaries, respectively. Finally, the locations of the components, corresponding to the estimated physical parameters, in the HR diagram were also discussed.

  7. Tolerancing the fabrication errors of static optical elements for ELT-size wide-field AO systems

    NASA Astrophysics Data System (ADS)

    Véran, Jean-Pierre; Pazder, John; Herriot, Glen; Andersen, David

    2012-07-01

    Advanced wide-field AO systems, such as Multi-Conjugate AO (MCAO) systems often require many static optical elements (mirror and lenses) in addition to the active ones (deformable mirrors). These static elements induce additional wave-front errors due to random fabrication errors such as polishing errors. For ELT-size AO systems, these optical elements can be very large, and thus their cost and availability critically depends on how of much fabrication error can be tolerated. Therefore, a rigorous tolerance analysis is absolutely critical. Requirements can, in principle be relaxed, on account that fabrication errors with spatial scales larger than the inter-actuator spacing of the deformable mirrors (DMs) can be corrected. However, this process is significantly complicated by the fact that these optical elements are often conjugated far away from the DMs, and therefore DM correction cannot be achieved over a wide field of view (FOV). In this paper, we present our tolerance analysis in the context of NFIRAOS, the first-light MCAO system for the Thirty Meter Telescope. We start from two top-level error budgets: the “on-axis” error budget, which specifies the acceptable residual wave-front error in the narrow 17”x17” science FOV; and the “off-axis” error budget, which specifies the acceptable residual wave-front error at the edge of the 2’ diameter technical FOV. The former directly relates to science image quality, whereas the latter directly relates to sky coverage. For different assumptions on the spatial power spectrum of the polishing errors, we derive the requirements on each optical element in NFIRAOS using a Monte-Carlo analysis of the predicted off-axis performance of the system with on axis AO correction.

  8. A Func~ao Zeta de um Corpo de Func~oes e o Teorema de Hasse-Weil

    E-print Network

    Torres, Fernando

    dependendo exclusivamente do g^enero g de F/Fq e de q. Este ser´a o Teorema da Cota de Hasse-Weil. A fun¸c~ao substancial provando para o caso particular de um corpo de fun¸c~oes com g^enero um, isto ´e, para curvas el propriedades. Em todo texto F denota um corpo de fun¸c~oes alg´ebricas de g^enero g cujo corpo de constantes 1

  9. HIGH RESOLUTION H{alpha} IMAGES OF THE BINARY LOW-MASS PROPLYD LV 1 WITH THE MAGELLAN AO SYSTEM

    SciTech Connect

    Wu, Y.-L.; Close, L. M.; Males, J. R.; Follette, K.; Morzinski, K.; Kopon, D.; Rodigas, T. J.; Hinz, P.; Puglisi, A.; Esposito, S.; Pinna, E.; Riccardi, A.; Xompero, M.; Briguglio, R.

    2013-09-01

    We utilize the new Magellan adaptive optics system (MagAO) to image the binary proplyd LV 1 in the Orion Trapezium at H{alpha}. This is among the first AO results in visible wavelengths. The H{alpha} image clearly shows the ionization fronts, the interproplyd shell, and the cometary tails. Our astrometric measurements find no significant relative motion between components over {approx}18 yr, implying that LV 1 is a low-mass system. We also analyze Large Binocular Telescope AO observations, and find a point source which may be the embedded protostar's photosphere in the continuum. Converting the H magnitudes to mass, we show that the LV 1 binary may consist of one very-low-mass star with a likely brown dwarf secondary, or even plausibly a double brown dwarf. Finally, the magnetopause of the minor proplyd is estimated to have a radius of 110 AU, consistent with the location of the bow shock seen in H{alpha}.

  10. Effect of Ambrotose AO® on resting and exercise-induced antioxidant capacity and oxidative stress in healthy adults

    PubMed Central

    2010-01-01

    Background The purpose of this investigation was to determine the effects of a dietary supplement (Ambrotose AO®) on resting and exercise-induced blood antioxidant capacity and oxidative stress in exercise-trained and untrained men and women. Methods 25 individuals (7 trained and 5 untrained men; 7 trained and 6 untrained women) received Ambrotose AO® (4 capsules per day = 2 grams per day) or a placebo for 3 weeks in a random order, double blind cross-over design (with a 3 week washout period). Blood samples were collected at rest, and at 0 and 30 minutes following a graded exercise treadmill test (GXT) performed to exhaustion, both before and after each 3 week supplementation period. Samples were analyzed for Trolox Equivalent Antioxidant Capacity (TEAC), Oxygen Radical Absorbance Capacity (ORAC), malondialdehyde (MDA), hydrogen peroxide (H2O2), and nitrate/nitrite (NOx). Quality of life was assessed using the SF-12 form and exercise time to exhaustion was recorded. Resting blood samples were analyzed for complete blood count (CBC), metabolic panel, and lipid panel before and after each 3 week supplementation period. Dietary intake during the week before each exercise test was recorded. Results No condition effects were noted for SF-12 data, for GXT time to exhaustion, or for any variable within the CBC, metabolic panel, or lipid panel (p > 0.05). Treatment with Ambrotose AO® resulted in an increase in resting levels of TEAC (p = 0.02) and ORAC (p < 0.0001). No significant change was noted in resting levels of MDA, H2O2, or NOx (p > 0.05). Exercise resulted in an acute increase in TEAC, MDA, and H2O2 (p < 0.05), all which were higher at 0 minutes post exercise compared to pre exercise (p < 0.05). No condition effects were noted for exercise related data (p > 0.05), with the exception of ORAC (p = 0.0005) which was greater at 30 minutes post exercise for Ambrotose AO® compared to placebo. Conclusion Ambrotose AO® at a daily dosage of 4 capsules per day increases resting blood antioxidant capacity and may enhance post exercise antioxidant capacity. However, no statistically detected difference is observed in resting or exercise-induced oxidative stress biomarkers, in quality of life, or in GXT time to exhaustion. PMID:21040582

  11. Design, Implementation, and On-Sky Performance of an Advanced Apochromatic Triplet Atmospheric Dispersion Corrector for the Magellan Adaptive Optics System and VisAO Camera

    NASA Astrophysics Data System (ADS)

    Kopon, Derek; Close, Laird M.; Males, Jared R.; Gasho, Victor

    2013-08-01

    We present the novel design, laboratory verification, and on-sky performance of our advanced triplet atmospheric dispersion corrector (ADC), an important component of the Magellan Adaptive Optics system (MagAO), which recently achieved first light in December 2012. High-precision broadband (0.5--1.0 ?m) atmospheric dispersion correction at visible wavelengths is essential both for wavefront sensing (WFS) on fainter guide stars, and for performing visible AO science using our VisAO science camera. At 2 airmasses (60° from zenith) and over the waveband 500--1000 nm, our triplet design produces a 57% improvement in geometric rms spot size, a 33% improvement in encircled energy at 20? radius, and a 62% improvement in Strehl ratio when compared to a conventional doublet design. This triplet design has been fabricated, tested in the lab, and integrated into the MagAO WFS and the VisAO science camera. We present on-sky results of the ADC in operation with the MagAO system. We also present a zero-beam-deviation triplet ADC design, which will be important to future AO systems that require precise alignment of the optical axis over a large range of airmasses in addition to diffraction-limited broadband dispersion correction.

  12. LE 7.8 Se g : X Y e uma aplicac~ao, escreve-se (C) = {x X : g(x) C}.

    E-print Network

    Granja, Gustavo

    · LE 7.8 Se g : X Y ´e uma aplica¸c~ao, escreve-se g-1 (C) = {x X : g(x) C}. Seja f : Rn Rm uma aplica¸c~ao cont´inua. Mostre que (i) Se C Rn ´e aberto, f-1 (C) ´e aberto. (ii) Se C Rn ´e fechado, f-1 (C) ´e fechado. (iii) D^e um exemplo mostrando que se C ´e conexo, f-1 (C) pode n~ao ser conexo e

  13. AO/NAO Response to Climate Change. 2; Relative Importance of Low- and High-Latitude Temperature Changes

    NASA Technical Reports Server (NTRS)

    Rind, D.; Perlwitz, J.; Lonergan, P.; Lerner, J.

    2005-01-01

    Using a variety of GCM experiments with various versions of the GISS model, we investigate how different aspects of tropospheric climate changes affect the extratropical Arctic Oscillation (AO)/North Atlantic Oscillation (NAO) circulation indices. The results show that low altitude changes in the extratropical latitudinal temperature gradient can have a strong impact on eddy forcing of the extratropical zonal wind, in the sense that when this latitudinal temperature gradient increases, it helps force a more negative AO/NAO phase. In addition, local conditions at high latitudes can stabilize/destabilize the atmosphere, inducing negative/positive phase changes. To the extent that there is not a large temperature change in the tropical upper troposphere (either through reduced tropical sensitivity at the surface, or limited transport of this change to high levels), the changes in the low level temperature gradient can provide the dominate influence on the extratropical circulation, so that planetary wave meridional refraction and eddy angular momentum transport changes become uncorrelated with potential vorticity transports. In particular, the climate change that produces the most positive NAO phase change would have substantial warming in the tropical upper troposphere over the Pacific Ocean, with high latitude warming in the North Atlantic. An increase in positive phase of these circulation indices is still more likely than not, but it will depend on the degree of tropical and high latitude temperature response and the transport of low level warming into the upper troposphere. These are aspects that currently differ among the models used for predicting the effects of global warning, contributing to the lack of consensus of future changes in the AO/NAO.

  14. A novel mammalian expression system derived from components coordinating nicotine degradation in arthrobacter nicotinovorans pAO1

    PubMed Central

    Malphettes, Laetitia; Weber, Cornelia C.; El-Baba, Marie Daoud; Schoenmakers, Ronald G.; Aubel, Dominique; Weber, Wilfried; Fussenegger, Martin

    2005-01-01

    We describe the design and detailed characterization of 6-hydroxy-nicotine (6HNic)-adjustable transgene expression (NICE) systems engineered for lentiviral transduction and in vivo modulation of angiogenic responses. Arthrobacter nicotinovorans pAO1 encodes a unique catabolic machinery on its plasmid pAO1, which enables this Gram-positive soil bacterium to use the tobacco alkaloid nicotine as the exclusive carbon source. The 6HNic-responsive repressor-operator (HdnoR-ONIC) interaction, controlling 6HNic oxidase production in A.nicotinovorans pAO1, was engineered for generic 6HNic-adjustable transgene expression in mammalian cells. HdnoR fused to different transactivation domains retained its ONIC-binding capacity in mammalian cells and reversibly adjusted transgene transcription from chimeric ONIC-containing promoters (PNIC; ONIC fused to a minimal eukaryotic promoter [Pmin]) in a 6HNic-responsive manner. The combination of transactivators containing various transactivation domains with promoters differing in the number of operator modules as well as in their relative inter-ONIC and/or ONIC-Pmin spacing revealed steric constraints influencing overall NICE regulation performance in mammalian cells. Mice implanted with microencapsulated cells engineered for NICE-controlled expression of the human glycoprotein secreted placental alkaline phosphatase (SEAP) showed high SEAP serum levels in the absence of regulating 6HNic. 6HNic was unable to modulate SEAP expression, suggesting that this nicotine derivative exhibits control-incompatible pharmacokinetics in mice. However, chicken embryos transduced with HIV-1-derived self-inactivating lentiviral particles transgenic for NICE-adjustable expression of the human vascular endothelial growth factor 121 (VEGF121) showed graded 6HNic response following administration of different 6HNic concentrations. Owing to the clinically inert and highly water-soluble compound 6HNic, NICE-adjustable transgene control systems may become a welcome alternative to available drug-responsive homologs in basic research, therapeutic cell engineering and biopharmaceutical manufacturing. PMID:16002786

  15. Laboratory results and status update for Pathfinder, the LINC-NIRVANA NGS ground-layer AO subsystem

    NASA Astrophysics Data System (ADS)

    Kopon, Derek; Conrad, Al; Bertram, Thomas; Herbst, Tom; Kürster, Martin; Berwein, Juergen; Ragazzoni, Roberto; Farinato, Jacopo; Viotto, Valentina; Bergomi, Maria; Rohloff, Ralf-Rainer; Baumeister, Harald; De Bonis, Fulvio; Hofferbert, Ralph; Brunelli, Alessandro; Arcidiacono, Carmelo; Pott, Jörg-Uwe; Bizenberger, Peter; Briegel, Florian; Meschke, Daniel; Mohr, Lars; Zhang, Xianyu; Kittmann, Frank

    2013-12-01

    The full LINC-NIRVANA instrument will be one of the most complex ground-based astronomical systems ever built. It will consist of multiple subsystems, including two multi-conjugate ground layer AO systems (MCAO) that drive the LBT adaptive secondaries, two mid-high layer AO systems with their own Xynetics 349 actuator DM's, a fringe tracker, and a beam combiner. In order to mitigate risk, we take a modular approach to instrument testing and commissioning by decoupling these subsystems individually. The first subsystem tested on-sky will be one of the ground-layer AO systems, part of a test-bed known as the Pathfinder. The Pathfinder consists of a 12-star pyramid WFS that drives one of the LBT's adaptive secondaries, a support structure known as "The Foot," and the infrared test camera (IRTC), which is used for acquisition and alignment. The 12 guide stars are acquired by moveable arms called "star enlargers," each of which contains its own optical path. The Pathfinder will be shipped from MPIA in Heidelberg, Germany to the LBT mountain lab on Mt. Graham, Arizona in February. The system will be unpacked, assembled in the LBT clean room, and internally optically aligned. We present the results of our system tests, including star enlarger alignment and system alignment. We also present our immediate plans for on-sky closed loop tests on the LBT scheduled for early Fall. Because plans for all ELTs call for ground layer correction, the Pathfinder provides valuable preliminary information not only for the full LINC-NIRVANA system, but also for future advanced MCAO systems.

  16. Intra and interobserver concordance of the AO classification system for fractures of the long bones in the pediatric population?

    PubMed Central

    Utino, Artur Yudi; de Alencar, Douglas Rene; Fernadez Maringolo, Leonardo; Negrão, Julia Machado; Blumetti, Francesco Camara; Dobashi, Eiffel Tsuyoshi

    2015-01-01

    Objective The AO classification for fractures of the long bones in the pediatric population was developed and validated in 2006. However, the complexity of this system has limited its use in clinical practice and few studies in the literature have evaluated its reproducibility and applicability. The present study had the objective of determining the intra and interobserver agreement using the pediatric AO system, among physicians with different levels of experience. Methods After making the sample calculation, 108 consecutive radiographs on long-bone fractures in patients aged 0–16 years, coming from the digital files of the quaternary-level hospital, were selected. The radiographs were classified by five examiners with different levels of experience after prior explanations about the system. A chart containing images from the classification was made available for consultation. The evaluations were made at two different times by each observer. The Fleiss kappa index was used to ascertain the intra and interobserver agreement. Results Intraobserver agreement that was at least substantial was obtained for all the items of the classification and it reached excellent levels for all observers in relation to five of the seven items considered. The interobserver evaluation presented excellent levels of agreement in two items, substantial in two items, moderate to substantial in one item and poor to moderate in one item. No influence from the observer's experience was observed with regard to obtaining higher or lower levels of agreement, either in the intraobserver or in the interobserver evaluation. Conclusions In this study, the intra and interobserver agreement was considered to be good or excellent for the pediatric AO classification system, for the parameters of bone, segment, paired bone, subsegment, standard and deviation. However, the intra and interobserver agreement was statistically unsatisfactory for the parameter of severity/side of avulsion. The levels of agreement obtained did not depend on the observer's level of experience within pediatric orthopedics. PMID:26535194

  17. Imaging the living retina at the cellular level with AO parallel spectral-domain optical coherence tomography

    NASA Astrophysics Data System (ADS)

    Miller, Donald T.; Zhang, Yan; Rha, Jungtae; Jonnal, Ravi S.; Gao, Weihua

    2005-12-01

    We investigate a novel camera that incorporates adaptive optics (AO) and optical coherence tomography (OCT) to determine if it can achieve the necessary 3-D resolution, sensitivity, and speed for imaging individual cells in the living human retina. An AO spectral-domain OCT system was constructed that is based on a free-space Michelson interferometer design. The OCT sub-system consists of a broadband superluminescent diode whose beam passes through an astigmatic lens to form a line illumination pattern on the retina, which is then imaged onto the slit of an imaging spectrometer. The detector of the spectrometer is a scientific-grade areal CCD. Conventional flood illumination, also with AO, was integrated into the camera and provided confirmation of the focus position in the retina. Short bursts of narrow B-scans (100x560 microns) of the living retina were subsequently acquired at 500 Hz during dynamic compensation that corrected the most significant ocular aberrations across a dilated 6 mm pupil. Camera sensitivity (up to 94 dB) was sufficient for observing reflections from essentially all neural layers of the retina. The 3-D resolution of the B-scans (3.0x3.0x5.7 microns) is the highest reported to date in the living human eye. It was sufficient to observe the interface between the inner and outer segments of individual photoreceptor cells, resolved in both lateral and axial dimensions. The waveguiding nature of the photoreceptors is suggestive at multiple reflective sites. Micro-movements of the retina during short burst imaging allow averaging to reduce speckle contrast, but they appear insufficient for significant speckle reduction.

  18. A FUNC~AO DELTA DE DIRAC Notas de aula de Mec^anica Qu^antica I -Marcus A.M. de Aguiar -29/08/2006

    E-print Network

    de Aguiar, Marcus A. M.

    A FUNC~AO DELTA DE DIRAC Notas de aula de Mec^anica Qu^antica I - Marcus A.M. de Aguiar - 29/08/2006 A fun¸c~ao delta de Dirac ´e definida pelas seguintes propriedades (x) = 0 se x = 0 B A g(x)(x)dx = g(0) se A delta ´e bastante singular temos que pensar

  19. 21`eme Congr`es Francais de Mecanique Bordeaux, 26 au 30 ao^ut 2013 Observation experimentale de l'instabilite parametrique

    E-print Network

    Dauxois, Thierry

    21`eme Congr`es Fran¸cais de M´ecanique Bordeaux, 26 au 30 ao^ut 2013 Observation exp´erimentale de´esent´e dans un article de revue [1] consid´erant `a la fois des ondes propagatives et des ondes stationnaires;21`eme Congr`es Fran¸cais de M´ecanique Bordeaux, 26 au 30 ao^ut 2013 notre connaissance, aucune ´etude

  20. 2009 BBC Project Activity Univ. of Washington

    E-print Network

    Washington at Seattle, University of

    and storage of our field samples. Big Beef Creek has been a valuable resource for efficiently completing length of both sides of the entire canal. The data will be used for generating a canal wide population of Washington, I am conducting distributional sampling for crayfish in Washington State lakes with the intent

  1. S.A. Murphy Univ. of Michigan

    E-print Network

    Murphy, Susan A.

    disorders such as alcohol, cocaine addiction and mental illness Characteristics: ·Improvement marred need. Mimic Clinical Practice. ·Brooner et al. (2002) Treatment of Cocaine Addiction ·Breslin et al. (1999) Treatment of Alcohol Addiction ·Prokaska et al. (2001) Treatment of Tobacco Addiction ·Unützer et

  2. L'univers clos de Stephen Hawking.

    NASA Astrophysics Data System (ADS)

    Andrillat, H.

    Einstein had curved space, Hawking will curve time. Hawking's universe is a closed model, a 4-sphere, which encloses its own space and its own time. Nothing exists outside and without any time overlapping this 4-sphere, it cannot have a beginning, an evolution or an end. It only is. But such an absolute existence of this type of universe implies that its 3-dimensional sclices - which are our physical space - cannot have the same absolute state of being. Thus, they are necessarily transitory, with a beginning and an end, in time which is the 4th remaining dimension of the 4-sphere. Hawking absolute universe is the cause of time.

  3. Exotic atoms. [Univ. of Wyoming, Laramie, Wyoming

    SciTech Connect

    Kunselman, R.

    1993-01-01

    The experiments use a solid hydrogen layer to form muonic hydrogen isotopes that escape into vacuum. The method relies on transfer of the muon from protium to either a deuteron or a triton. The resulting muonic deuterium or muonic tritium will not immediately thermalize because of the very low elastic cross sections, and may be emitted from the surface of the layer. Measurements which detect decay electrons, muonic x-rays, and fusion products have been used to study the processes. A target has been constructed which exploits muonic atom emission in order to learn more about the energy dependence of transfer and muon molecular formation.

  4. Princeton Univer sity Plasma Physics Laboratory

    E-print Network

    ;2. that this is the amQunt of energy required to get Lake Ontario up to the boiling point, a Herculean'task of greater of energy that will be required to operate the world for one year when industrial civilization as we know it now has spread over a substantial fraction of the world. The world now con sumes between O. 1 and O. 2

  5. Heuristics for Prime Statistics Brown Univ.

    E-print Network

    Lozano-Robledo, Alvaro

    of prime numbers, and we have reason to believe that it is a mystery into which the human mind will never penetrate. L. Euler (1751) Although the prime numbers are rigidly determined, they somehow feel like), . . .? 3 #12;Relevance of Mersenne and Fermat primes A perfect number is an integer equal to the sum of its

  6. c 2012 AMSS CAS & SUZHOU UNIV

    E-print Network

    Badawi, Ayman

    by Jiping Zhang Abstract. Let R be a commutative ring with nonzero identity. In this paper, we study the von Neumann regular elements of R. We also study the idempotent elements, - regular elements, the von Neumann local elements, and the clean elements of R. Finally, we investigate the subgraphs of the zero

  7. [Activities of Psychology Dept., California Univ.

    NASA Technical Reports Server (NTRS)

    Bridgeman, Bruce

    1998-01-01

    We have completed two studies during the grant period, with manuscripts published or ready for submission for publication: (1) Dual adaptation and adaptive generalization in the human vestibuloocular reflex and (2) Frequency vs. acceleration specificity in human VOR adaptation. In the 1st study two studies examined the possibility that rotational VOR plasticity is subject to dual adaptation and adaptive generalization. Subjects in the experimental condition were exposed to an altered visual-vestibular environment for about four minutes every day for five consecutive days. The working hours between these testing sessions constituted re-exposure to the normal visual environment. Thus, subjects were repeatedly adapting and re-adapting to both environments which is a condition designed to produce dual adaptation. In each training session a measure of baseline VOR gain was obtained (in the dark). A small laser spot (the only visual stimulus) was systematically moved in the same direction as the subject's head, but by half the angle of rotation (target/head gain = 0.5). This resulted in adaptation values relativized to the non-adapted gain of each subject. These values were then analyzed using an analysis of variance with day and session (within a day) as factors. In the 2nd study human VOR adaption has been assumed to be frequency specific, despite the fact that the semicircular canals are simulated by rotational acceleration and not frequency per se.

  8. IMAGES AND REASONING KEIO UNIV. PRESS, 2005

    E-print Network

    Longo, Giuseppe

    , besides the information conveyed in the linguistic medium, human beings have often to deal with visual) that this conception requires the use of a language of thought. Thus, in this perspective, the cognitive processes, in particular reasoning, take place in such a language. Besides, from the perspective of logic, reasoning

  9. THE FIRST CIRCUMSTELLAR DISK IMAGED IN SILHOUETTE AT VISIBLE WAVELENGTHS WITH ADAPTIVE OPTICS: MagAO IMAGING OF ORION 218-354

    SciTech Connect

    Follette, Katherine B.; Close, Laird M.; Males, Jared R.; Wu, Ya-Lin; Morzinski, Katie M.; Hinz, Philip; Rodigas, Timothy J.; Kopon, Derek; Puglisi, Alfio; Esposito, Simone; Riccardi, Armando; Pinna, Enrico; Xompero, Marco; Briguglio, Runa

    2013-09-20

    We present high-resolution adaptive optics (AO) corrected images of the silhouette disk Orion 218-354 taken with Magellan AO (MagAO) and its visible light camera, VisAO, in simultaneous differential imaging mode at H?. This is the first image of a circumstellar disk seen in silhouette with AO and is among the first visible light AO results in the literature. We derive the disk extent, geometry, intensity, and extinction profiles and find, in contrast with previous work, that the disk is likely optically thin at H?. Our data provide an estimate of the column density in primitive, ISM-like grains as a function of radius in the disk. We estimate that only ?10% of the total submillimeter derived disk mass lies in primitive, unprocessed grains. We use our data, Monte Carlo radiative transfer modeling, and previous results from the literature to make the first self-consistent multiwavelength model of Orion 218-354. We find that we are able to reproduce the 1-1000 ?m spectral energy distribution with a ?2-540 AU disk of the size, geometry, small versus large grain proportion, and radial mass profile indicated by our data. This inner radius is a factor of ?15 larger than the sublimation radius of the disk, suggesting that it is likely cleared in the very interior.

  10. 2/13/2014 Moinhos de vento anexados ao celular recarregam bateria -EXAME.com http://exame.abril.com.br/tecnologia/noticias/cientistas-criam-moinhos-de-vento-que-recarregam-bateria 1/4

    E-print Network

    Chiao, Jung-Chih

    2/13/2014 Moinhos de vento anexados ao celular recarregam bateria - EXAME.com http://exame.abril A A A Moinhos de vento anexados ao celular recarregam bateria Gustavo Gusmão, de Tweetar 21 375Compartilhar Share 4 Salvar notícia Home / Tecnologia #12;2/13/2014 Moinhos de vento anexados ao celular recarregam

  11. 2/13/2014 Moinhos de vento anexados ao celular recarregam bateria -Pgina 2 -EXAME.com http://exame.abril.com.br/tecnologia/noticias/cientistas-criam-moinhos-de-vento-que-recarregam-bateria?page=2 1/3

    E-print Network

    Chiao, Jung-Chih

    2/13/2014 Moinhos de vento anexados ao celular recarregam bateria - Página 2 - EXAME.com http.739) Imprimir A A A Moinhos de vento anexados ao celular recarregam bateria Gustavo Gusmão, de Tweetar 0 0 Preço Share 4 Salvar notícia Home / Tecnologia #12;2/13/2014 Moinhos de vento anexados ao celular recarregam

  12. Ajuda externa: Programa da 'troika' tem de ir evoluindo ao longo do tempo -Fernando Ulrich Lisboa, 20 set (Lusa) -O presidente do BPI, Fernando Ulrich, considerou hoje que o

    E-print Network

    Instituto de Sistemas e Robotica

    Ajuda externa: Programa da 'troika' tem de ir evoluindo ao longo do tempo - Fernando Ulrich Lisboa financeira e económica a Portugal "tem de ir evoluindo ao longo do tempo" e que os justos não podem pagar IST, que "o programa da 'troika' tem de ir evoluindo ao longo do tempo". Ulrich acrescentou mesmo

  13. The Triaxial Ellipsoid Diameters and Rotational Pole of Asteroid (9) Metis from AO at Gemini and Keck

    NASA Astrophysics Data System (ADS)

    Drummond, Jack D.; Merline, W. J.; Conrad, A.; Dumas, C.; Tamblyn, P.; Christou, J.; Carry, B.; Chapman, C.

    2012-10-01

    From Adaptive Optics (AO) images of (9) Metis at 14 epochs over 2008 December 8 and 9 at Gemini North, triaxial ellipsoid diameters of 218x175x112 km are derived with fitting uncertainties of 3x3x47 km. However, by including just two more AO images from Keck-II in June and August of 2003 in a global fit, the fitting uncertainty of the small axis drops by more than a third because of the lower sub-Earth latitude afforded in 2003 (-28°) compared to 2008 (+47°), and the triaxial ellipsoid diameters become 218x175x129 km with fitting uncertainties of 3x3x14 km. We have estimated the systematic uncertainty of our method to be 4.1, 2.7, and 3.8%, respectively, for the three diameters. These values were recently derived (Drummond et al., in prep) from a comparison of KOALA (Carry et al, Planetary and Space Science 66, 200-212) and our triaxial ellipsoid analysis of four asteroids. Quadratically adding this systematic error with the fitting error, the total uncertainty for Metis becomes 9x5x15 km. Concurrently, we find an EQJ2000 rotational pole at [RA; Dec]=[185° +19°] or in ecliptic coordinates, [? ; ? ]=[176° +20°] (ECJ2000).

  14. A new polymer-based laccase for decolorization of AO7: long-term storage and mediator reuse.

    PubMed

    Zhang, Xiaolin; Pan, Bingcai; Wu, Bing; Zhang, Weiming; Lv, Lu

    2014-07-01

    To address the bottlenecks of laccase-based catalysis, i.e., poor long-term stability and potential secondary pollution caused by synthetic mediator, we fabricated a new biocatalyst (N-PS-Lac) through adsorption of laccase onto polystyrene anion exchangers (N-PS) binding quaternary ammonium groups. After 2-year storage, the residual activity of N-PS-Lac remained as high as 101.7%, while that for native laccase was only 14.6%. Also, N-PS-Lac exhibited improved durability against pH variation and thermal treatment at 60°C. Gaussian curve fitting of FT-IR spectra indicated that laccase conformation of N-PS-Lac was rigidified, possibly because of the host geometric restriction and the host-laccase electrostatic attraction. A two-step method, i.e., adsorption of an azo dye AO7 by N-PS and then ectopic degradation by the immobilized laccase, was proposed to reuse the mediator HOBT for seven cyclic runs, where N-PS-Lac kept the constant decolorization efficiency. AO7 solution was detoxified completely after decolorization by the two-step method. PMID:24862000

  15. Morphological evolution of z ~ 1 galaxies from deep K-band AO imaging in the COSMOS deep field

    NASA Astrophysics Data System (ADS)

    Huertas-Company, M.; Rouan, D.; Soucail, G.; Le Fèvre, O.; Tasca, L.; Contini, T.

    2007-06-01

    Context: We present the results of an imaging program of distant galaxies (z˜0.8) at high spatial resolution (~0.1'') aiming at studying their morphological evolution. We observed 7 fields of 1'×1' with the NACO Adaptive Optics system (VLT) in Ks (2.16~?m) band with typical V˜14 guide stars and 3 h integration time per field. Observed fields are selected within the COSMOS survey area, in which multi-wavelength photometric and spectroscopic observations are ongoing. High angular-resolution K-band data have the advantage of probing old stellar populations in the rest-frame, enabling a determination of galaxy morphological types unaffected by recent star formation, which are more closely linked to the underlying mass than classical optical morphology studies (HST). Adaptive optics on ground based telescopes is the only method today for obtaining such a high resolution in the K-band, but it suffers from limitations since only small fields are observable and long integration times are necessary. Aims: In this paper we show that reliable results can be obtained and establish a first basis for larger observing programs. Methods: We analyze the morphologies by means of B/D (bulge/disk) decomposition with GIM2D and C-A (concentration-asymmetry) estimators for 79 galaxies with magnitudes between K_s=17-23 and classify them into three main morphological types (late type, early type and irregulars). Automated and objective classification allows precise error estimation. Simulations and comparisons with seeing-limited (CFHT/Megacam) and space (HST/ACS) data are carried out to evaluate the accuracy of adaptive optics-based observations for morphological purposes. Results: We obtain the first estimate of the distribution of galaxy types at redshift z˜1 as measured from the near infrared at high spatial resolution. We show that galaxy parameters (disk scale length, bulge effective radius, and bulge fraction) can be estimated with a random error lower than 20% for the bulge fraction up to K_s=19 (AB=21) and that classification into the three main morphological types can be done up to K_s=20 (AB=22) with at least 70% of the identifications correct. We used the known photometric redshifts to obtain a redshift distribution over 2 redshift bins (z<0.8, 0.8Univers of the Centre National de la Recherche Scientifique (CNRS) of France, and the University of Hawaii. This work is based in part on data products produced at TERAPIX and the Canadian Astronomy Data Centre as part of the Canada-France-Hawaii Telescope Legacy Survey, a collaborative project of the NRC and CNRS. Appendix A and Table 6 are only available in electronic form at http://www.aanda.org

  16. An alise Matem atica III -Exerc cios-Desa o (Os exerc cios t^em uma indica c~ao ; ; ou consoante o grau relativo de di culdade.)

    E-print Network

    Nunes, João Pimentel

    Teorema da Fun#24;c~ao Inversa, demonstre o Teorema da Fun#24;c~ao Im- pl#19;#16;cita. Sugest~ao: Considere F : S #26; R n ! R m com n > m, com S aberto e F de classe C 1 e as equa#24;c~oes F (z; y) = 0 com (z; y)). Aplique o Teorema da fun#24;c~ao inversa #18;a fun#24;c~ao H . Exerc#19;#16;cio-Desa#12;o 4

  17. A SURVEY OF THE HIGH ORDER MULTIPLICITY OF NEARBY SOLAR-TYPE BINARY STARS WITH Robo-AO

    SciTech Connect

    Riddle, Reed L.; Bui, Khanh; Dekany, Richard G.; Kulkarni, Shrinivas; Tendulkar, Shriharsh P.; Tokovinin, Andrei; Mason, Brian D.; Hartkopf, William I.; Roberts, Lewis C. Jr.; Baranec, Christoph; Law, Nicholas M.; Burse, Mahesh P.; Das, H. K.; Punnadi, Sujit; Ramaprakash, A. N.

    2015-01-20

    We conducted a survey of nearby binary systems composed of main sequence stars of spectral types F and G in order to improve our understanding of the hierarchical nature of multiple star systems. Using Robo-AO, the first robotic adaptive optics instrument, we collected high angular resolution images with deep and well-defined detection limits in the Sloan Digital Sky Survey i' band. A total of 695 components belonging to 595 systems were observed. We prioritized observations of faint secondary components with separations over 10'' to quantify the still poorly constrained frequency of their subsystems. Of the 214 secondaries observed, 39 contain such subsystems; 19 of those were discovered with Robo-AO. The selection-corrected frequency of secondary subsystems with periods from 10{sup 3.5} to 10{sup 5} days is 0.12 ± 0.03, the same as the frequency of such companions to the primary. Half of the secondary pairs belong to quadruple systems where the primary is also a close pair, showing that the presence of subsystems in both components of the outer binary is correlated. The relatively large abundance of 2+2 quadruple systems is a new finding, and will require more exploration of the formation mechanism of multiple star systems. We also targeted close binaries with periods less than 100 yr, searching for their distant tertiary components, and discovered 17 certain and 2 potential new triples. In a subsample of 241 close binaries, 71 have additional outer companions. The overall frequency of tertiary components is not enhanced, compared to all (non-binary) targets, but in the range of outer periods from 10{sup 6} to 10{sup 7.5} days (separations on the order of 500 AU), the frequency of tertiary components is 0.16 ± 0.03, exceeding the frequency of similar systems among all targets (0.09) by almost a factor of two. Measurements of binary stars with Robo-AO allowed us to compute first orbits for 9 pairs and to improve orbits of another 11 pairs.

  18. ROSAT guest investigator program (AO-1). On a search for coronal x ray emissions from white dwarfs

    NASA Technical Reports Server (NTRS)

    Musielak, Z. E.

    1992-01-01

    We have suggested that cool magnetic white dwarfs may be sources of X-ray coronal emission and proposed several prominent candidates for this emission. One of these candidates (EG 250) was approved for the C-category observation by the National and International Committee and was observed by ROSAT on April 17, 1991. Unfortunately, the granted exposure time (1071 s) was much shorter than that which was required by theoretical predictions to observe coronal X-ray emission from this object. The tape containing the data was send to us in November 1991. Since then we have analyzed the data visiting the ROSAT Science Center at NASA Goddard Space Flight Center. The analysis of the data taken during this short observation show, as expected, no X-rays. It is our hope that EG 250 will be observed again during the AO-2 phase of pointed observations, as 10,000 s of observing time was granted to V. Trimble for the C-category observation of this star. We have a close contact with Dr. Trimble regarding this matter. Because our all targets (GD 90, KUV 2316-123 and GD 356) proposed for the observation during the AO-2 phase of pointed observations have been approved by the National and International Committee, we have installed the required software at NASA/MSFC to be able to carry out the data analysis in Huntsville. Two of our targets have already been observed (KUV 2316-123 was observed on Dec. 3, 1991 with 10,000 s of the exposure time, and GD 356 was observed on Jan 4, 1992 with 5,000 s of the exposure time). We just received the data and will begin the analysis soon. The results of our analysis will be reported to the scientific community by publishing papers in the Astrophysical Journal Letters. Our intention is to submit a paper when the analysis of the data taken during AO2 is completed. The data taken during the observation of EG 250 will be a part of this paper.

  19. Theoretical studies of the osmium based perovskites AOsO3 (A=Ca, Sr and Ba)

    NASA Astrophysics Data System (ADS)

    Ali, Zahid; Sattar, Abdul; Asadabadi, S. Jalali; Ahmad, Iftikhar

    2015-11-01

    Osmium based perovskites AOsO3 (A=Ca, Sr and Ba) have been studied theoretically using density functional theory approach. These studies show that CaOsO3 and SrOsO3 are orthorhombic and BaOsO3 is cubic and are consistent with the experiments. The electronic band structures demonstrate that these compounds are metals. The magnetic studies verify the experimental observations at low temperature, where the spin effects are canceled by the orbitals. The stable magnetic phase optimizations and magnetic susceptibilities calculations by the post-DFT treatment confirm that CaOsO3 and SrOsO3 are weak ferromagnetic whereas BaOsO3 is a paramagnetic material. The directional magnetic study shows that these compounds are magnetically anisotropic, and reveals that the easy magnetization axis is [001] direction.

  20. A useful surgical strategy for proximal tibial fractures (AO/OTA type 41-C) with diaphyseal involvement

    PubMed Central

    Wu, Dankai; Reng, Guangkai; Shrivastava, Ankit; Yu, Ying; Zhang, Yueyang; Peng, Chuangang

    2015-01-01

    Relatively few studies have addressed surgical strategy for complex proximal tibial fractures by now. The purpose of this study was to assess the results of a single lateral locking plate using minimally invasive plate osteosynthesis (MIPO) for proximal tibia fractures (AO/OTA type 41-C) with diaphyseal involvement. From Jun 2009 to Jun 2014, 20 patients (fifteen women and five men, mean age 35.8 years) were managed for proximal tibial fractures which extend into the diaphyseal region of the bone, including three 41-C1, eleven 41-C2, and six 41-C3. Twelve patients were open fractures. A single lateral locking plate characterized by percutaneous technology was used with or without additional lag screws. Mobilization was started immediately after the procedure, and non-weight-bearing was maintained for at least 6 weeks, then progressively weight bearing depends on both clinical and x-ray findings. Primary union was achieved by 16 of the 20 study subjects. Early bone grafting was performed in 4 cases with a massive initial bone defect and staged bone grafting was used in one to treat nonunion. The mean articular step off was 1.0 mm (range, 0-3 mm). No patient had misalignment greater than 10°. Acceptable range of knee motion of ?120° was achieved in sixteen, and the mean knee Hass score was 87.4 at final follow-up visits. The complications included superficial infection in one patient. In conclusion, the surgical strategy can provide favorable results in the treatment of proximal tibial fractures (AO/OTA type 41-C) with diaphyseal involvement. PMID:26550282

  1. Dealing with the forecast of the optical turbulence as a tool to support astronomy assisted by AO facilities

    NASA Astrophysics Data System (ADS)

    Masciadri, Elena; Lascaux, Franck; Fini, Luca

    2015-04-01

    In the context of the research activities related to the forecast of the optical turbulence and the atmospherical parameters being relevant for ground-based astronomy we focus here our attention on two specific topics: 1. pros and cons of different solutions to supply wind speed and direction stratification on the whole atmosphere all along a night to support AO facilities; 2. the necessity of instrumentation for optical turbulence monitoring (vertical profiles on the whole atmosphere) to be used operationally. In the last two decades the development and the use of different vertical profilers covering the whole atmosphere or part of it in application to the astronomy took place. Several instruments based on different principles (with associated pros and cons) have been applied in different contexts in astronomy with a main use in the site characterization and site selection. Time changed and the necessity of the astronomy supported by AO facilities is much more demanding with a diversification of applications. Recently, motivated by a precise necessity related to the identification of an absolute reference to carry out studies on optical turbulence forecasts (MOSE project), we carried out a verification of the reliability of a few instruments that lead us to put in evidence some limitations for a few of them. At the same time such a detailed analysis permitted us to clarify the nature of some astroclimatic parameters. The main conclusion at which we arrived is two-fold. From one side we could trace a list of warnings related to different uses of such instruments. On the other side we could identify open problems that indicate that there is still space for research in the field of turbulence monitoring in application to the astronomy. Some suggestions are proposed.

  2. The First AO Classification System for Fractures of the Craniomaxillofacial Skeleton: Rationale, Methodological Background, Developmental Process, and Objectives

    PubMed Central

    Audigé, Laurent; Cornelius, Carl-Peter; Ieva, Antonio Di; Prein, Joachim

    2014-01-01

    Validated trauma classification systems are the sole means to provide the basis for reliable documentation and evaluation of patient care, which will open the gateway to evidence-based procedures and healthcare in the coming years. With the support of AO Investigation and Documentation, a classification group was established to develop and evaluate a comprehensive classification system for craniomaxillofacial (CMF) fractures. Blueprints for fracture classification in the major constituents of the human skull were drafted and then evaluated by a multispecialty group of experienced CMF surgeons and a radiologist in a structured process during iterative agreement sessions. At each session, surgeons independently classified the radiological imaging of up to 150 consecutive cases with CMF fractures. During subsequent review meetings, all discrepancies in the classification outcome were critically appraised for clarification and improvement until consensus was reached. The resulting CMF classification system is structured in a hierarchical fashion with three levels of increasing complexity. The most elementary level 1 simply distinguishes four fracture locations within the skull: mandible (code 91), midface (code 92), skull base (code 93), and cranial vault (code 94). Levels 2 and 3 focus on further defining the fracture locations and for fracture morphology, achieving an almost individual mapping of the fracture pattern. This introductory article describes the rationale for the comprehensive AO CMF classification system, discusses the methodological framework, and provides insight into the experiences and interactions during the evaluation process within the core groups. The details of this system in terms of anatomy and levels are presented in a series of focused tutorials illustrated with case examples in this special issue of the Journal. PMID:25489387

  3. Promoter isolation and characterization of GhAO-like1, a Gossypium hirsutum gene similar to multicopper oxidases that is highly expressed in reproductive organs.

    PubMed

    Lambret-Frotté, Julia; Artico, Sinara; Muniz Nardeli, Sarah; Fonseca, Fernando; Brilhante Oliveira-Neto, Osmundo; Grossi-de-Sá, Maria Fatima; Alves-Ferreira, Marcio

    2016-01-01

    Cotton is one of the most economically important cultivated crops. It is the major source of natural fiber for the textile industry and an important target for genetic modification for both biotic stress and herbicide tolerance. Therefore, the characterization of genes and regulatory regions that might be useful for genetic transformation is indispensable. The isolation and characterization of new regulatory regions is of great importance to drive transgene expression in genetically modified crops. One of the major drawbacks in cotton production is pest damage; therefore, the most promising, cost-effective, and sustainable method for pest control is the development of genetically resistant cotton lines. Considering this scenario, our group isolated and characterized the promoter region of a MCO (multicopper oxidase) from Gossypium hirsutum, named GhAO-like1 (ascorbate oxidase-like1). The quantitative expression, together with the in vivo characterization of the promoter region reveals that GhAO-like1 has a flower- and fruit-specific expression pattern. The GUS activity is mainly observed in stamens, as expected considering that the GhAO-like1 regulatory sequence is enriched in cis elements, which have been characterized as a target of reproductive tissue specific transcription factors. Both histological and quantitative analyses in Arabidopsis thaliana have confirmed flower (mainly in stamens) and fruit expression of GhAO-like1. In the present paper, we isolated and characterized both in silico and in vivo the promoter region of the GhAO-like1 gene. The regulatory region of GhAO-like1 might be useful to confer tissue-specific expression in genetically modified plants. PMID:26692462

  4. Multi-wavelength Observations of Blazar AO 0235+164 in the 2008-2009 Flaring State

    NASA Astrophysics Data System (ADS)

    Ackermann, M.; Ajello, M.; Ballet, J.; Barbiellini, G.; Bastieri, D.; Bellazzini, R.; Blandford, R. D.; Bloom, E. D.; Bonamente, E.; Borgland, A. W.; Bottacini, E.; Bregeon, J.; Brigida, M.; Bruel, P.; Buehler, R.; Buson, S.; Caliandro, G. A.; Cameron, R. A.; Caraveo, P. A.; Casandjian, J. M.; Cavazzuti, E.; Cecchi, C.; Charles, E.; Chekhtman, A.; Chiang, J.; Ciprini, S.; Claus, R.; Cohen-Tanugi, J.; Cutini, S.; D'Ammando, F.; de Palma, F.; Dermer, C. D.; Silva, E. do Couto e.; Drell, P. S.; Drlica-Wagner, A.; Dubois, R.; Favuzzi, C.; Fegan, S. J.; Ferrara, E. C.; Focke, W. B.; Fortin, P.; Fuhrmann, L.; Fukazawa, Y.; Fusco, P.; Gargano, F.; Gasparrini, D.; Gehrels, N.; Germani, S.; Giglietto, N.; Giommi, P.; Giordano, F.; Giroletti, M.; Glanzman, T.; Godfrey, G.; Grenier, I. A.; Guiriec, S.; Hadasch, D.; Hayashida, M.; Hughes, R. E.; Itoh, R.; Jóhannesson, G.; Johnson, A. S.; Katagiri, H.; Kataoka, J.; Knödlseder, J.; Kuss, M.; Lande, J.; Larsson, S.; Lee, S.-H.; Longo, F.; Loparco, F.; Lott, B.; Lovellette, M. N.; Lubrano, P.; Madejski, G. M.; Mazziotta, M. N.; McEnery, J. E.; Mehault, J.; Michelson, P. F.; Mitthumsiri, W.; Mizuno, T.; Monte, C.; Monzani, M. E.; Morselli, A.; Moskalenko, I. V.; Murgia, S.; Naumann-Godo, M.; Nishino, S.; Norris, J. P.; Nuss, E.; Ohsugi, T.; Okumura, A.; Omodei, N.; Orlando, E.; Ozaki, M.; Paneque, D.; Panetta, J. H.; Pelassa, V.; Pesce-Rollins, M.; Pierbattista, M.; Piron, F.; Pivato, G.; Porter, T. A.; Rainò, S.; Rando, R.; Rastawicki, D.; Razzano, M.; Readhead, A.; Reimer, A.; Reimer, O.; Reyes, L. C.; Richards, J. L.; Sbarra, C.; Sgrò, C.; Siskind, E. J.; Spandre, G.; Spinelli, P.; Szostek, A.; Takahashi, H.; Tanaka, T.; Thayer, J. G.; Thayer, J. B.; Thompson, D. J.; Tinivella, M.; Torres, D. F.; Tosti, G.; Troja, E.; Usher, T. L.; Vandenbroucke, J.; Vasileiou, V.; Vianello, G.; Vitale, V.; Waite, A. P.; Winer, B. L.; Wood, K. S.; Yang, Z.; Zimmer, S.; Fermi-LAT Collaboration; Moderski, R.; Nalewajko, K.; Sikora, M.; Villata, M.; Raiteri, C. M.; Aller, H. D.; Aller, M. F.; Arkharov, A. A.; Benítez, E.; Berdyugin, A.; Blinov, D. A.; Boettcher, M.; Bravo Calle, O. J. A.; Buemi, C. S.; Carosati, D.; Chen, W. P.; Diltz, C.; Di Paola, A.; Dolci, M.; Efimova, N. V.; Forné, E.; Gurwell, M. A.; Heidt, J.; Hiriart, D.; Jordan, B.; Kimeridze, G.; Konstantinova, T. S.; Kopatskaya, E. N.; Koptelova, E.; Kurtanidze, O. M.; Lähteenmäki, A.; Larionova, E. G.; Larionova, L. V.; Larionov, V. M.; Leto, P.; Lindfors, E.; Lin, H. C.; Morozova, D. A.; Nikolashvili, M. G.; Nilsson, K.; Oksman, M.; Roustazadeh, P.; Sievers, A.; Sigua, L. A.; Sillanpää, A.; Takahashi, T.; Takalo, L. O.; Tornikoski, M.; Trigilio, C.; Troitsky, I. S.; Umana, G.; GASP-WEBT Consortium; Angelakis, E.; Krichbaum, T. P.; Nestoras, I.; Riquelme, D.; F-GAMMA; Krips, M.; Trippe, S.; Iram-PdBI; Arai, A.; Kawabata, K. S.; Sakimoto, K.; Sasada, M.; Sato, S.; Uemura, M.; Yamanaka, M.; Yoshida, M.; Kanata; Belloni, T.; Tagliaferri, G.; RXTE; Bonning, E. W.; Isler, J.; Urry, C. M.; SMARTS; Hoversten, E.; Falcone, A.; Pagani, C.; Stroh, M.; (Swift-XRT

    2012-06-01

    The blazar AO 0235+164 (z = 0.94) has been one of the most active objects observed by Fermi Large Area Telescope (LAT) since its launch in Summer 2008. In addition to the continuous coverage by Fermi, contemporaneous observations were carried out from the radio to ?-ray bands between 2008 September and 2009 February. In this paper, we summarize the rich multi-wavelength data collected during the campaign (including F-GAMMA, GASP-WEBT, Kanata, OVRO, RXTE, SMARTS, Swift, and other instruments), examine the cross-correlation between the light curves measured in the different energy bands, and interpret the resulting spectral energy distributions in the context of well-known blazar emission models. We find that the ?-ray activity is well correlated with a series of near-IR/optical flares, accompanied by an increase in the optical polarization degree. On the other hand, the X-ray light curve shows a distinct 20 day high state of unusually soft spectrum, which does not match the extrapolation of the optical/UV synchrotron spectrum. We tentatively interpret this feature as the bulk Compton emission by cold electrons contained in the jet, which requires an accretion disk corona with an effective covering factor of 19% at a distance of 100 R g. We model the broadband spectra with a leptonic model with external radiation dominated by the infrared emission from the dusty torus.

  5. Extreme Exoplanet Direct Imaging: New Results with GPI and SCExAO and the Path to Imaging Another Earth

    NASA Astrophysics Data System (ADS)

    Currie, Thayne

    2015-12-01

    We describe the discovery of a bright, young Kuiper belt-like debris disk around HD 115600, a ˜ 1.4--1.5 M_{?}, ˜ 15 Myr old member of the Sco-Cen OB Association. Our H-band coronagraphy/integral field spectroscopy from the Gemini Planet Imager shows the ring has a (luminosity scaled) semi major axis of (˜ 22 AU) ˜ 48 AU, similar to the current Kuiper belt. The disk appears to have neutral scattering dust, is eccentric (e ˜ 0.1--0.2), and could be sculpted by analogues to the outer solar system planets. Spectroscopy of the disk ansae reveal a slightly blue to gray disk color, consistent with major Kuiper belt chemical constituents, where water-ice is a very plausible dominant constituent. Besides being the first object discovered with the next generation of extreme adaptive optics systems (i.e. SCExAO, GPI, SPHERE), HD 115600's debris ring and planetary system provides a key reference point for the early evolution of the solar system, the structure and composition of the Kuiper belt, and the interaction between debris disks and planets.

  6. Methanol Masers Observations in the 3-mm Bandwidth at the Radio Telescope RT-22 CrAO

    E-print Network

    S. Yu. Zubrin; A. V. Antyufeyev; V. V. Myshenko; V. M. Shulga

    2007-12-10

    We report the beginning of the astronomical masers investigations in the 3-mm bandwidth at the radio telescope RT-22 (CrAO, Ukraine). For this purpose the special complex for maser lines investigation in 85...115 GHz frequency band is developed. It is made on the base of the low noise cryogenic Shottky-diode receiver and the high resolution Fourier-spectrometer. The cryogenic receiver has the DSB noise temperature less than 100K. The spectral channel separation of the Fourier-spectrometer is about 4kHz and the spectrometer bandwidth is 8 MHz. Results of maser observations of 8$^{0}-7^{1} $A$^{+}$ transition of methanol (95.169 GHz) towards DR-21(OH), DR-21W and NGC7538 are in good agreement with early obtained results by other authors. On the basis of the analysis of the location of masers in the NGC7538 direction we can assume that the origin of all known class I methanol masers in this region is connected with existing molecular outflows from young stars.

  7. LDEF (Prelaunch), AO175 : Evaluation of Long-Duration Exposure to the Natural Space Environment on G

    NASA Technical Reports Server (NTRS)

    1984-01-01

    LDEF (Prelaunch), AO175 : Evaluation of Long-Duration Exposure to the Natural Space Environment on Graphite-Polyimide and Graphite-Epoxy Mechanical Properties, Tray A01 The Graphite-Polyimide and Graphite-Epoxy Mechanical Properties experiment is located in two (2) three (3) inch deep peripheral trays, A01 and A07. The experiment hardware configuration in the A01 tray consists of a graph- ite-epoxy honeycomb sandwich panel in the lower one half (1/2) of the tray, a graphite-epoxy panel in the upper right one third (1/3rd) section and two (2) graphite-polyimide panels, one in the upper center and one in the upper left sections of the experiment tray. The panels are supported by a substructure and held in place with aluminum strips and non-magnetic stainless steel fasteners. The mounting system, designed to allow for differential thermal expansion, minimizes the risk of inducing high stresses into the test panels.

  8. Detection of Diffuse Interstellar Bands in the z=0.5 Damped Lyman alpha system towards AO 0235+164

    E-print Network

    York, B A; Lawton, B; Churchill, C W; Snow, T P; Johnson, R A; Ryan, S G; York, Brian A.; Ellison, Sara L.; Lawton, Brandon; Churchill, Christopher W.; Snow, Theodore P.; Johnson, Rachel A.; Ryan, Sean G.

    2006-01-01

    We report the first detection of the 5705 and 5780 A Diffuse Interstellar Bands (DIBs) in a moderate redshift Damped Lyman alpha (DLA) system. We measure a rest frame equivalent width of 63.2 +- 8.7 mA for the 5705 and 216+-9 mA for the 5780 A feature in the z_abs 0.524 DLA towards AO 0235+164 and derive limits for the equivalent widths of the bands at 5797, 6284, and 6613 A. The equivalent width of the 5780 band is lower than would be expected based on the Galactic correlation of DIB strength with N(HI), but is in good agreement with the correlation with E(B-V). The relative strengths of the 5780 and 6284 A DIBs are inconsistent with all Galactic and extragalactic sightlines, except one Small Magellanic Cloud wing sightline towards Sk 143. However, the relative strengths of the 5705 and 5780 A DIBs are consistent with the Galactic relation, indicating that the relative strengths of these bands may be less sensitive to environment or that they may be associated with a similar carrier. The detection of DIBs at...

  9. Detection of Diffuse Interstellar Bands in the z=0.5 Damped Lyman alpha system towards AO 0235+164

    E-print Network

    Brian A. York; Sara L. Ellison; Brandon Lawton; Christopher W. Churchill; Theodore P. Snow; Rachel A. Johnson; Sean G. Ryan

    2006-05-18

    We report the first detection of the 5705 and 5780 A Diffuse Interstellar Bands (DIBs) in a moderate redshift Damped Lyman alpha (DLA) system. We measure a rest frame equivalent width of 63.2 +- 8.7 mA for the 5705 and 216+-9 mA for the 5780 A feature in the z_abs 0.524 DLA towards AO 0235+164 and derive limits for the equivalent widths of the bands at 5797, 6284, and 6613 A. The equivalent width of the 5780 band is lower than would be expected based on the Galactic correlation of DIB strength with N(HI), but is in good agreement with the correlation with E(B-V). The relative strengths of the 5780 and 6284 A DIBs are inconsistent with all Galactic and extragalactic sightlines, except one Small Magellanic Cloud wing sightline towards Sk 143. However, the relative strengths of the 5705 and 5780 A DIBs are consistent with the Galactic relation, indicating that the relative strengths of these bands may be less sensitive to environment or that they may be associated with a similar carrier. The detection of DIBs at z~0.5 demonstrates that the organic compounds usually assumed to be the band carriers were already present in the universe some five gigayears ago.

  10. Rise of The Machines: First Year Operations of The Robo-AO Visible-Light Laser-Adaptive-Optics Instrument

    NASA Astrophysics Data System (ADS)

    Baranec, C.; Riddle, R.; Law, N.; Ramaprakash, A. N.; Tendulkar, S.; Hogstrom, K.; Bui, K.; Burse, M.; Chordia, P.; Das, H.; Dekany, R.

    2013-09-01

    Robo-AO is the first autonomous laser adaptive optics system and science instrument operating on sky. With minimal human oversight, the system robotically executes large scale surveys, monitors long-term astrophysical dynamics and characterizes newly discovered transients, all at the visible diffraction limit. The average target-to-target operational overhead, including slew time, is a mere 86 s, enabling up to ~200 observations per night. The first of many envisioned systems went live in June 2012, and has since finished 51 nights of science observing at the Palomar Observatory 60-inch (1.5 m) telescope, with over 5,600 robotic observations executed as of March 2013. The system will be augmented in late 2013 with a low-noise wide field infrared camera, which will double as a tip-tilt sensor, to widen the spectral bandwidth of observations, increase available sky coverage as well as enable deeper visible imaging using adaptive-optics sharpened infrared tip-tilt guide sources.

  11. [Unstable fracture of the distal radius and its treatment: comparison of three techniques: external fixation, intramedullary pinning and AO plates].

    PubMed

    Sennwald, G R; Della Santa, D

    2001-06-01

    This retrospective study compares 94 distal radius fractures. Sixty one women (median age 66) and 33 men (median age 42) were reviewed clinically and radiologically by a surgeon not involved in treatment. Fractures were classified into three AO groups. Standard X-rays were used for radiological evaluation. Fractures of the distal ulna were evaluated separately. Chi-square tests, Wilcoxon, Mann-Whitney and Fisher's tests were used for statistical evaluation. Women presented mainly "A" type fractures. They were treated by intramedullary pinning. Forty two fractures were grafted, using autogenous bone for young patients and bone substitute for the elderly. Twelve scapholunate dissociations were recorded, all but one were detected in women, 50 years of age or more. Four were painfree, two presented climatic pain and six claimed pain during effort; none had snapping. Radio-ulnar laxity was similar with or without styloid fractures. External fixator and autogenous grafts appeared the most efficient technique for maintaining radial length. Ulnar head fractures were related to a significant higher incidence of sympathetic dystrophy with reduced prono-supination, a correlation not previously noted to your knowledge. This suggests that radius and ulnar head fracture should be classified independently. The amount of pain was not related to classification, internal fixation or gender. PMID:11496608

  12. Intracavity KTP optical parametric oscillator driven by a KLM Nd:GGG laser with a single AO modulator

    NASA Astrophysics Data System (ADS)

    Chu, Hongwei; Zhao, Shengzhi; Yang, Kejian; Zhao, Jia; Li, Yufei; Li, Tao; Li, Guiqiu; Li, Dechun; Qiao, Wenchao

    2015-05-01

    An intracavity KTiOPO4 (KTP) optical parametric oscillator (OPO) pumped by a Kerr lens mode-locking (KLM) Nd:GGG laser near 1062 nm with a single AO modulator was realized for the first time. The mode-locking pulses of the signal wave were obtained with a short duration of subnanosecond and a repetition rate of several kilohertz (kHz). Under a diode pump power of 8.25 W, a maximum output power of 104 mW at signal wavelength near 1569 nm was obtained at a repetition rate of 2 kHz. The highest pulse energy and peak power were estimated to be 80 ?J and 102 kW at a repetition rate of 1 kHz, respectively. The shortest pulse duration was measured to be 749 ps. By considering the Gaussian spatial distribution of the photon density and the Kerr-lens effect in the gain medium, a set of the coupled rate equations for QML intracavity optical parametric oscillator are given and the numerical simulations are basically fitted with the experimental results.

  13. Interdecadal variability of the Atlantic meridional overturning circulation in the pre-industrial simulation of HadGEM2-AO

    NASA Astrophysics Data System (ADS)

    Moon, Byung-Kwon; Wie, Jieun; Kim, Ki-Young; Lee, Johan; Boo, Kyung-On; Cho, ChunHo

    2014-05-01

    Atlantic meridional overturning circulation(AMOC) has particularly important roles for the climate system because it, as a part of the ocean circulation, poleward transports the vast amount of heat and brings atmospheric chemicals into deep ocean layers. Here we investigated the temporal and spatial characteristics of AMOC using the 300-yr simulation data from the pre-industrial experiment of HadGEM2-AO. AMOC has the dominant periodicities of the both interannual (2-7 years) and interdecadal (20 and 40 years) time scales. The regression analysis reasonably well captured the relationship between the AMOC intensity and meridional temperature gradient, i.e.,, the enhanced AMOC leads to the surface warming at high latitudes as well as thinning of Arctic sea ice. In addition, the lead-lag correlation analysis indicates that the instability caused by the out of phase between meridional temperature gradient and AMOC strength drive the natural AMOC fluctuation. This study has found that the variation of AMOC intensity can be explained by the only ocean circulation dynamics except the effect of external influences such as the atmosphere-ocean interactions.

  14. 0.4 Imers"oes e mergulhos. Subvariedades. Podemos copiar as defini,c"oes da se,c"ao 0.1 para variedades de Banach. As*

    E-print Network

    Tausk, Daniel Victor

    a um mergulho forte f: M ! N 'e f'acil ver que * *f admite inversas locais `a esquerda de classe Ck teorema da fun,c"ao inversa (e da fun,c"ao impl'icita), a forma local das* * imers"oes e das submers ! N 'e um mergulho forte de classe Ck (k 1) se f for uma imers"ao forte de classe Ck e al'em do mais

  15. European Photovoltaic Solar Energy Conference, Hamburg, Germany, 21-25 September 2009, 2AO.1.3 CAMERA-BASED PHOTOLUMINESCENCE LIFETIME IMAGING

    E-print Network

    24th European Photovoltaic Solar Energy Conference, Hamburg, Germany, 21-25 September 2009, 2AO.1 rapidness and the fact that measurement conditions close to solar cell operating conditions can be adjusted. Importantly, it is possible to monitor the processing of solar cells at any stage of fabrication

  16. A high-throughput screening assay for identification of inhibitors of the A1AO-ATP synthase of the rumen methanogen Methanobrevibacter ruminantium M1.

    PubMed

    Aung, Htin Lin; Dey, Debjit; Janssen, Peter H; Ronimus, Ron S; Cook, Gregory M

    2015-03-01

    We report the development of a high-throughput screening platform to identify inhibitors of the membrane-bound A1Ao-ATP synthase from the rumen methanogen Methanobrevibacter ruminantium M1. Inhibitors identified in the screen were tested against growing cultures of M. ruminantium, validating the approach to identify new inhibitors of methanogens. PMID:25575416

  17. SOCIEDADE MISTRIO Voo da Malsia Numa altura em que o Homem lana sondas para cartografar o planeta Marte, ningum sabe ao certo onde

    E-print Network

    Instituto de Sistemas e Robotica

    planeta Marte, ninguém sabe ao certo onde se encontra o avião da Malaysia Airlines, com 239 pessoas semanas antes, chegaram de Marte no- vas imagens recolhidas pela sonda "Cu- riosity". Mas duas semanas supertelescópios e os planos para via- gens a Marte, a verdade é que a Terra tem ainda muitas zonas negras quando

  18. Since When or How Often? Dissociating the Roles of Age of Acquisition (AoA) and Lexical Frequency in Early Visual Word Processing

    ERIC Educational Resources Information Center

    Adorni, Roberta; Manfredi, Mirella; Proverbio, Alice Mado

    2013-01-01

    The aim of the study was to investigate the effect of both word age of acquisition (AoA) and frequency of occurrence on the timing and topographical distribution of ERP components. The processing of early- versus late-acquired words was compared with that of high-frequency versus low-frequency words. Participants were asked to perform an…

  19. GenAge: a genomic and proteomic network map of human ageing Jo~ao Pedro de Magalh~aes*, Olivier Toussaint

    E-print Network

    de Magalhães, João Pedro

    GenAge: a genomic and proteomic network map of human ageing Jo~ao Pedro de Magalh~aes*, Olivier ageing. Moreover, we rendered the first proteomic network map of human ageing, which suggests these genes fit together and impact on human ageing. The only few genes shown to influence human ageing

  20. Sept. 18, 2012 Kahua A`o, A Learning Foundation Weather Maps and Hazardous Storms of Hawai`i Hurricane `Iniki making landfall over Kaua`i,

    E-print Network

    Businger, Steven

    Sept. 18, 2012 Kahua A`o, A Learning Foundation Weather Maps and Hazardous Storms of Hawai`i 1 Hurricane `Iniki making landfall over Kaua`i, 11 September 1992. Title: N `Ino Ma Hawai`i Nei: Weather Maps. However, mapping the history of natural hazards in a region, combined with an understanding of related

  1. arXiv:0901.3725v1[physics.ao-ph]23Jan2009 A Brief Tutorial on the Ensemble Kalman Filter

    E-print Network

    Mandel, Jan

    arXiv:0901.3725v1[physics.ao-ph]23Jan2009 A Brief Tutorial on the Ensemble Kalman Filter Jan Mandel February 2007, updated January 2009 Abstract The ensemble Kalman filter (EnKF) is a recursive filter equations in geophysical models. The EnKF originated as a version of the Kalman filter for large problems

  2. Secure Electronic Payments Based on Mobile Agents

    E-print Network

    da Silva, Alberto Rodrigues

    Secure Electronic Payments Based on Mobile Agents Artur Rom~ao Dep. Matematica - Univ. Evora artur on the Internet. For exam- ple, by browsing a company's Web server, ordering a product and paying for it lling Contact author: Dep. Matematica, Univ. Evora 7000 EVORA - PORTUGAL. 1 #12;of secure servers, based

  3. Tracing The Origin Of Methane And Water On Mars: Mapping Regions Of Active Release At Ultra-high Spatial Resolution Using Keck And VLT Under AO Control.

    NASA Astrophysics Data System (ADS)

    Mumma, Michael J.; Villanueva, G. L.; Campbell, R.; Lyke, J.; Conrad, A.; Encrenaz, T.; Hartogh, P.; Kauefl, U.; Novak, R. E.; Tokunaga, A.

    2009-09-01

    Strong release of methane from active regions on Mars has been reported in northern summer (1) and southern spring (2). The spatial resolution of these measurements was about 500 km, sufficient to reveal discrete active regions. Regions of methane release appear mainly over ancient terrain (Noachian/Hesperian) known to have a rich hydration history, and often marked by fossae or other scarps. However, higher resolution is needed to test whether methane release is confined to a small number of narrowly defined vents or is widely distributed over the 500 km footprint. If narrowly confined, the plume should have correspondingly higher local density, enhancing spectral searches for water, methane, their isotopologues, and other trace gases that could reveal aspects of methane generation and depth of release. Ground-based telescopes equipped with both adaptive optics (AO) and high dispersion infrared spectrometers have delivered much higher spatial resolution on planetary bodies, but until now have not been applied to Mars. We acquired images and spectra of Mars under AO control at infrared wavelengths, using Keck-2 and ESO-VLT. In June 2009, we acquired test images with NIRC2/Keck-2 using AO in the natural guide star mode and achieved 0.12” FWHM resolution at 3.0 µm wavelength (Mars diameter was 4.7"). Diffraction-limited performance (0.06” at 3 µm) is expected during follow-up observations in September 2009. We observed Mars with UT1 under AO control (MACAO) in August and September 2009, and acquired spectra with CRIRES. We expect to achieve spatial resolution approaching 40 km in November-December 2009, representing a reduction in area by nearly a factor of 100 compared with earlier non-AO searches. Preliminary results will be presented. This work was funded by NASA grants 08-PAST08-0034 (Planetary Astronomy) and 08-PATM080-0031 (Planetary Atmospheres). 1. Mumma, Villanueva, Novak et al., Science 323, 1041 (2009) 2. Villanueva, Mumma, Novak, (in prep) 2009.

  4. Comparative production of 6-aminopenicillanic acid by different E. coli strains and their acridine orange (AO) induced mutants.

    PubMed

    Arshad, Rubina; Farooq, Shafqat; Ali, Syed Shahid

    2007-11-01

    The present study was conducted to see the difference in production of 6-APA I) between wild strains of E. coli collected from local environment and their acridine orange (AO) induced mutants and ii) between mutants and E. coli strains (ATCC 11105 and ATCC 9637) of American Type Culture Collection (ATCC) used commercially for enzymatic production of 6-APA. The optimum conditions for bioconversion were standardized and 6-APA was obtained in crystalline form. Relative PGA activity of local and foreign E. coli strains varied significantly with the highest being 12.7 in mutant strain (BDCS-N-M36) and the lowest 4.3 mg 6-APA h(-1) mg(-1) wet cells in foreign strain (ATCC 11105). The enzyme activity exhibited by mutant strain (BDCS-N-M36) was also two folds higher compared to that in wild parent BDCS-N-W50 (6.3 mg 6-APA h(-1) mg(-1) wet cells). The overall production of 6-APA and conversion ratios ranged between 0.25-0.41 g of 6-APA per 0.5 g of penicillin G and 51-83%, respectively. Maximum conversion ratio (83%) was achieved by using crude cells of mutant strain (BDCS-N-M36) which is the highest value ever reported by crude cells on a shake-flask scale whereas reported 6-APA production by immobilized cells is 60-90% in batch and continuous systems. Results are being discussed with reference to importance of local bacterial strains and their significance for industrially important enzymes. PMID:19090257

  5. Practical experience with test-driven development during commissioning of the multi-star AO system ARGOS

    NASA Astrophysics Data System (ADS)

    Kulas, M.; Borelli, Jose Luis; Gässler, Wolfgang; Peter, Diethard; Rabien, Sebastian; Orban de Xivry, Gilles; Busoni, Lorenzo; Bonaglia, Marco; Mazzoni, Tommaso; Rahmer, Gustavo

    2014-07-01

    Commissioning time for an instrument at an observatory is precious, especially the night time. Whenever astronomers come up with a software feature request or point out a software defect, the software engineers have the task to find a solution and implement it as fast as possible. In this project phase, the software engineers work under time pressure and stress to deliver a functional instrument control software (ICS). The shortness of development time during commissioning is a constraint for software engineering teams and applies to the ARGOS project as well. The goal of the ARGOS (Advanced Rayleigh guided Ground layer adaptive Optics System) project is the upgrade of the Large Binocular Telescope (LBT) with an adaptive optics (AO) system consisting of six Rayleigh laser guide stars and wavefront sensors. For developing the ICS, we used the technique Test- Driven Development (TDD) whose main rule demands that the programmer writes test code before production code. Thereby, TDD can yield a software system, that grows without defects and eases maintenance. Having applied TDD in a calm and relaxed environment like office and laboratory, the ARGOS team has profited from the benefits of TDD. Before the commissioning, we were worried that the time pressure in that tough project phase would force us to drop TDD because we would spend more time writing test code than it would be worth. Despite this concern at the beginning, we could keep TDD most of the time also in this project phase This report describes the practical application and performance of TDD including its benefits, limitations and problems during the ARGOS commissioning. Furthermore, it covers our experience with pair programming and continuous integration at the telescope.

  6. Molecular dynamics evidence for alkali-metal rattling in the ?-pyrochlores, AOs2O6 (A = K, Rb, Cs).

    PubMed

    Shoko, E; Peterson, V K; Kearley, G J

    2013-11-27

    We have used ab initio molecular dynamics simulations validated against inelastic neutron scattering data to study alkali-metal dynamics in the ?-pyrochlore osmates AOs2O6 (A=K, Rb, Cs) at 300 K to gain insight into the microscopic nature of rattling dynamics in these materials. Our results provide new evidence at the microscopic level for rattling dynamics: (1) the elemental magnitude spectra calculated from the MD show a striking dominance by the alkali metals at low energies indicating weak coupling to the cage, (2) the atomic root-mean-square displacements for the alkali metals are significantly larger than for the other atoms, e.g., 25% and 150% larger than O and Os, respectively, in KOs2O6, and (3) motions of the alkali metals are weakly correlated to the dynamics in their immediate environment, e.g. K in KOs2O6 is 6 times less sensitive to its local environment than Os, indicating weak bonding of the K. There is broadening of the elemental spectra of the alkali metals from Cs to K corresponding to a similar broadening of the local potential around these atoms as determined from potential of mean-force calculations. This feature of the spectra is partly explained by the well-known increase in the relative cage volume with decreasing atomic size of the alkali metal. We find that for the smallest rattler in this series (K) the larger relative cage volume allows this atom freedom to explore a large space inside the cage leading to vibration at a broader range of frequencies, hence a broader spectrum. Thus, since K is considered the best rattler in this series, these findings suggest that a significant feature of a good rattler is the ability to vibrate at several different but closely spaced frequencies. PMID:24172693

  7. LDEF (Prelaunch), AO133 : Effect of Space Environment on Space-Based Radar Phased-Array Antenna, Tra

    NASA Technical Reports Server (NTRS)

    1984-01-01

    LDEF (Prelaunch), AO133 : Effect of Space Environment on Space-Based Radar Phased-Array Antenna, Tray H07 The prelaunch photograph was taken in SAEF II at KSC prior to installation of the integrated tray on the LDEF. The Space-Based Radar (SBR) Phased-Array Antenna Experiment occupies a six (6) inch deep LDEF end corner tray located on the space end of the LDEF. The SBR Phased-Array Antenna experiment consists of both passive and active parts. The passive part , shown in the left half of the experiment tray, investigates the dimensional stability of Kapton when exposed to induced stresses in the space environment. Continuous and spliced specimen of both plain Kapton (127 um thick) and glass reinforced Kapton (196 um thick) will be exposed for the entire mission. The Kapton specimen array contains eight 2.54-cm-wide specimen and sixteen (16) 1.27-cm-wide specimen. The specimen are stretched over an aluminum roller assembly and utilize a spring loaded mechanism to provide preselected stresses. An aluminum support structure houses two (2) identical set of specimen, one exposed to the total environment and one shadowed. The fasteners are non-magnetic stainless steel and the black surface is a thermal control coating, 3M-Nextel 401-610 (Black Velvet). The active part of the experiment, located in the right half of the tray, investigates the interaction between high voltage and low-Earth-orbit plasma. A fourteen (14) inch wide by twenty eight (28) inch long section of the Grumman SBR Phased-Array antenna consisting of two Kapton antenna planes and a perforated aluminum ground plane mounted on an aluminum support structure. Cop- per dipole elements deposited on the Kapton antenna plane provide the high voltage electrodes. The fasteners are non-magnetic stainless steel and the black surface is a thermal control coating, 3M-Nextel 401-610 (Black Velvet).

  8. Variability of the Amundsen Sea Low and the Associated Regional Sea Ice Trends in the AO-UMUKCA Model

    NASA Astrophysics Data System (ADS)

    Jrrar, Amna; Abraham, N. Luke; Holland, David; Pyle, John A.

    2015-04-01

    Significant Sea ice loss in the Amundsen and Bellingshausen Seas, and regional warming in West Antarctica and the Antarctica Peninsula have been observed over the past few decades. These changes are affected by the presence of the Amundsen Sea Low (ASL), a quasi-stationary area of climatological low pressure that exists over the South Pacific sector of the Southern Ocean between the Antarctic Peninsula and the Ross Sea. Previous studies have shown that the circulation in the ASL sector region is strongly influenced by large-scale patterns of atmospheric variability, such as the southern annular mode (SAM) and El Nino Southern Oscillation (ENSO). Studies have also demonstrated a deepening of the ASL, particularly in austral spring and to a lesser extent autumn, the former related to decreases in the underlying cyclone central pressures and the latter previously suggested as due to stratospheric ozone depletion. However, two recent studies have demonstrated that surface warming related to the Atlantic Multidecadal Oscillation (AMO) reduces the surface pressure in the Amundsen Sea and contributes to the observed dipole-like sea-ice redistribution between the Ross and Amundsen-Bellingshausen seas and to the Antarctic Peninsula warming. We use the recently developed atmosphere-ocean chemistry-climate model AO-UMUKCA to investigate factors affecting the variability of the ASL and subsequently sea ice trends in the Amundsen-Bellingshausen seas. We use output from two simulations, a pre-industrial control integration forced with 1850s climate, and a time slice integration forced with 2000s climate. The control integration is used to estimate the internal variability of ASL, and in calculating the modeled sea ice trends in absence of external forcing. We investigate whether changes in the ASL, and subsequently sea ice trends are linked to variability in tropical sea surface temperatures. The different combinations of SAM-ENSO phase are also studied and linked to changes in the ASL.

  9. Magellan adaptive optics first-light observations of the exoplanet ? PIC b. I. Direct imaging in the far-red optical with MagAO+VisAO and in the near-IR with NICI {sup ,}

    SciTech Connect

    Males, Jared R.; Close, Laird M.; Morzinski, Katie M.; Skemer, Andrew J.; Kopon, Derek; Follette, Katherine B.; Hinz, Philip M.; Rodigas, Timothy J.; Wahhaj, Zahed; Liu, Michael C.; Nielsen, Eric L.; Chun, Mark; Puglisi, Alfio; Esposito, Simone; Riccardi, Armando; Pinna, Enrico; Xompero, Marco; Briguglio, Runa; Hayward, Thomas L. [Gemini Observatory, Southern Operations Center, c and others

    2014-05-01

    We present the first ground-based CCD (? < 1 ?m) image of an extrasolar planet. Using the Magellan Adaptive Optics system's VisAO camera, we detected the extrasolar giant planet ? Pictoris b in Y-short (Y{sub S} , 0.985 ?m), at a separation of 0.470 ± 0.''010 and a contrast of (1.63 ± 0.49) × 10{sup –5}. This detection has a signal-to-noise ratio of 4.1 with an empirically estimated upper limit on false alarm probability of 1.0%. We also present new photometry from the Gemini Near-Infrared Coronagraphic Imager instrument on the Gemini South telescope, in CH {sub 4S,1%} (1.58 ?m), K{sub S} (2.18 ?m), and K {sub cont} (2.27 ?m). A thorough analysis of our photometry combined with previous measurements yields an estimated near-IR spectral type of L2.5 ± 1.5, consistent with previous estimates. We estimate log (L {sub bol}/L {sub ?}) = –3.86 ± 0.04, which is consistent with prior estimates for ? Pic b and with field early-L brown dwarfs (BDs). This yields a hot-start mass estimate of 11.9 ± 0.7 M {sub Jup} for an age of 21 ± 4 Myr, with an upper limit below the deuterium burning mass. Our L {sub bol}-based hot-start estimate for temperature is T {sub eff} = 1643 ± 32 K (not including model-dependent uncertainty). Due to the large corresponding model-derived radius of R = 1.43 ± 0.02 R {sub Jup}, this T {sub eff} is ?250 K cooler than would be expected for a field L2.5 BD. Other young, low-gravity (large-radius), ultracool dwarfs and directly imaged EGPs also have lower effective temperatures than are implied by their spectral types. However, such objects tend to be anomalously red in the near-IR compared to field BDs. In contrast, ? Pic b has near-IR colors more typical of an early-L dwarf despite its lower inferred temperature.

  10. LDEF (Flight), AO175 : Evaluation of Long-Duration Exposure to the Natural Space Environment on Grap

    NASA Technical Reports Server (NTRS)

    1990-01-01

    LDEF (Flight), AO175 : Evaluation of Long-Duration Exposure to the Natural Space Environment on Graphite-Polyimide and Graphite-Epoxy Mechanical Properties, Tray A07 The flight photograph was taken while the LDEF was attached to the Orbiter's RMS arm prior to berthing in the Orbiter's cargo bay. The paint dots on the tray clampblocks have changed little from the orginal white color. The dots along the lower tray flange seem to have a faint light brown tint. The dull gold coating observed on the aluminum mounting strips in the prelaunch photograph has turned to a medium brown. The areas where the coating was scraped or abraided away appears as a metallic surface. PMR-15 Graphite-Polyimide Panel (precured) - The PMR-15 graphite-polyimide laminated panel (T40T30060-009) appears to have changed from the prelaunch brown color to a light gray. A geometric pattern, probably the results of the laminating process, is visible on the panel surface. Fine horizontal lines, cracks and/or crazing, can be seen over the geometrical pattern. The yellow colored identification numbers seem to be a little darker in the flight photograph but the white marking in the upper left corner do not appear to have changed. Scratch marks / abrasions on the lower left edge of panel were on prelaunch photographs. F-178/T300 Graphite-Polyimide Panel (cocured) - The 178/T300 graphite-polyimide panel (T40T30060-005) seems to have changed from the pre-launch dark brown to a light gray color. The yellow identification numbers seem darker in the flight photograph while the white marking in the upper left corner appear brighter. There appears to be fine horizontal lines, cracks and/or crazing, on the panel surface. F178/T300 Graphite-Polyimide Panel (precured) - The 178/T300 graphite-polyimide laminated panel (T40T30060-001) seems to have changed from the prelaunch dark brown color with a lighter brown area along its vertical center, extending from top to bottom, to a uniform light gray color. The yellow identification numbers seem to be a little darker than in the prelaunch photograph. The white marking seen on the lower right corner of the panel appeared to be off-white in the prelaunch photograph. There appears to be fine horizontal lines, cracks and/or crazing, on the panel surface.

  11. Time Differential Electrical Resistivity for Water Resource Assessment: A Case Study in Cura‡ao, Netherlands Antilles

    NASA Astrophysics Data System (ADS)

    Coles, D.; Vichabian, Y.; Sogade, J.; Spiertz, P.; Morgan, F. D.

    2003-12-01

    A method of groundwater prospecting is presented that capitalizes on changes in electrical resistivity arising from annual variability in subsurface fluid flow. According to Archie's Law, effective resistivity is a function of pore fluid resistivity, saturation, and porosity. For competent Earth materials, short-term temporal changes in near-surface porosity are negligible because changes in effective pressure are small with respect to the bulk moduli of the materials. Therefore, annual variability in effective resistivity is dependent only on fluid flow via changes in saturation and, to a lesser extent, pore fluid resistivity. Aquifer detection is but the first step; thereafter, it is necessary to estimate permeability, capacity, and, importantly, sustainability. Time differential resistivity is well matched to the task because it detects prospective aquifers and also illuminates their natural hydrodynamics. Explicitly, this method captures an undeveloped aquifer's seasonal volumetric variability, which is important as engineers reconcile monthly demand with monthly supply. The best scenario would be to detect a capacious, intermediate-resistivity (high pore fluid resistivity and high porosity) zone that is invariant from season to season (clays and ore bodies excepted). Less desirable, but still manageable, is the case where a large, porous formation undergoes significant seasonal resistivity variation; it behaves as a subterranean river with little lag-time between meteoric water input and groundwater throughput; carefully timed extraction and storage would be required in this case. A suite of thirty-eight electrical resistivity soundings were collected from the wet and dry seasons at Plantages PortoMari, an ecotourist plantation on the semiarid island of Cura‡ao, N.A. The data were analyzed with special attention paid to wet-to-dry season resistivity ratios. The results suggest two possible courses of action. (1) A hypothetical limestone terrace was detected whose estimated minimum water volume fluctuates between approximately 1200m3 and 2300m3; this terrace may be tapped with several boreholes descending to an elevation of 25m ASL. (2) A shallow subsurface dam and extraction fence (10m BGS) might be installed where the watershed corridor converges onto a flat plain whose surficial lithology is comprised of poorly sorted alluvia atop an impermeable clayey unit. Both extraction scenarios require storage facilities, as neither hydrogeologic setting indicates a persistent aquifer.

  12. LDEF (Prelaunch), AO175 : Evaluation of Long-Duration Exposure to the Natural Space Environment on G

    NASA Technical Reports Server (NTRS)

    1984-01-01

    LDEF (Prelaunch), AO175 : Evaluation of Long-Duration Exposure to the Natural Space Environment on Graphite-Polyimide and Graphite-Epoxy Mechanical Properties, Tray A07 The Graphite-Polyimide and Graphite-Epoxy Mechanical Properties experiment fills two (2) three (3) inch deep peripheral trays, A01 and A07. The experiment in the A07 experiment tray, shown in this photograph, consist of three (3) Graphite-Polyimide laminate panels and associated mounting hardware. Each panel occupies one third (1/3) of the LDEF experiment tray; a PMR-15 precured graphite-polyimide panel (T40T30060-009) in the right one third section, a F-178/T300 cocured graphite-polyimide panel (T40T30060-005) in the center one third section and a F-178/T300 precured graphite-polyimide panel (T40T30060-001) is in the left one third section of the tray. The panels are held in place with aluminum strips and non-magnetic stainless steel fasteners. The aluminum strips are covered with a dull gold coating over most of the exposed surface. The coating has been scraped from the aluminum mounting strip near the upper left tray corner. The mounting system, designed to allow for differential thermal expansion, minimizes the risk of inducing high stresses into the test panels. PMR-15 Graphite-Polyimide Panel (precured) - The PMR-15 graphite-polyimide laminated panel (T40T30060-009) is a uniform dark brown with a yellow identification number. The panel has several off-white marks in the lower right corner and light grayish-brown discolorations can be seen behind the identification number and behind the off-white marks. F-178/T300 Graphite-Polyimide Panel (cocured) - The F178/T300 graphite-polyimide laminated panel (T40T30060-005) is also a dark brown with a yellow identification number and small offwhite marks in the lower right corner. F-178/300 Graphite-Polyimide Panel (precured) - The F178/300 graphite-polyimide laminated panel (T40T30060-001) is a dark brown color with a yellow identification number and small offwhite marks in the panels upper left corner. The panel appears to have a lighter brown area along its vertical center that extends from the bottom to the top of the panel.

  13. SIMS chemical analysis of extended impacts on the leading and trailing edges of LDEF experiment AO187-2

    NASA Technical Reports Server (NTRS)

    Amari, S.; Foote, J.; Simon, Charles G.; Swan, P.; Walker, R. M.; Zinner, E.; Jessberger, E. K.; Lange, G.; Stadermann, F.

    1992-01-01

    The Long Duration Exposure Facility (LDEF) Experiment AO187-2 consisted of 237 capture cells, 120 on the leading edge and 117 on the trailing edge. Each cell was made of polished Ge plates covered with 2.5 micron thick mylar foil at 200 microns from the Ge. Although all leading edge cells and 105 trailing edge cells had lost their plastic covers during flight, optical and electron microscope examination revealed extended impacts in bare cells from either edge that apparently were produced by high velocity projectiles while the plastic foils were still in place. Detailed optical scanning yielded 53 extended impacts on 100 bare cells from the trailing edge that were selected for SIMS chemical analysis. Lateral multi-element ion probe profiles were obtained on 40 of these impacts. Material that can be attributed to the incoming projectiles was found in all analyzed extended compact features and most seem to be associated with cosmic dust particles. However, LDEF deposits are systematically enriched in the refractory elements Al, Ca, and Ti relative to Mg and Fe when compared to IDP's collected in the stratosphere and to chondritic compositions. These differences are most likely due to elemental fractionation effects during the high velocity impact but real differences between interplanetary particles captured on LDEF and stratospheric IDP's cannot be excluded. Recently we extended our studies to cells from the leading edge and the covered cells from the trailing edge. The 12 covered cells contain 20 extended impact candidates. Ion probe analysis of 3 yielded results similar to those obtained for impacts on the bare cells from the trailing edge. Optical scanning of the bare leading edge cell also reveals many extended impacts (42 on 22 cells scanned to date), demonstrating that the cover foils remained intact at least for some time. However, SIMS analysis showed elements that can reasonably be attributed to micrometeoroids in only 2 out of 11 impacts. Eight impacts have residues dominated by Al and one dominated by Ti, indicating a preponderance of orbital debris in leading edge impacts.

  14. MG LEHRER/INNEN/FORTBILDUNGSTAGUNG 11. April 2015 Zeit HS 13 HS 12 HS 11 HS 10 SR 11 + SR 12

    E-print Network

    Pottmann, Helmut

    Zentralmatura in Österreich 12:00 ­ 13:00 Ao. Univ.-Prof. Dr. Franz Pauer: Kettenregel, Substitution und Methode Mathematik ­ Einsichten und Hintergrundin- formationen Dr. Alexander Caspar: Was ist die Wurzel aus 36

  15. 17 `eme Congr`es Francais de Mecanique Troyes, 29 ao^ut -2 septembre 2005 Localisation et attenuation dans les cavites acoustiques irreguli`eres

    E-print Network

    Asch, Mark

    17 `eme Congr`es Franc¸ais de M´ecanique Troyes, 29 ao^ut - 2 septembre 2005 Localisation et att'absorption remarquables. Toutefois, la mise en oeuvre pratique de structures fractales comme dispositifs absorbants est d'influence de l'irr´egularit´e sur l'amortissement de ces modes et l'´emergence, comme dans le cas de structures

  16. 21`eme Congr`es Francais de Mecanique Bordeaux, 26 au 30 ao^ut 2013 Selection de forme par capillarite: l'exemple du claquage

    E-print Network

    Neukirch, Sébastien

    21`eme Congr`es Fran¸cais de M´ecanique Bordeaux, 26 au 30 ao^ut 2013 S´election de forme par, fluide-structure, bifurcation 1 Introduction Une coque sph´erique ou un arc ´elastique peut supporter des charges transverses importantes avant de c´eder. Pour des structures minces une charge trop importante

  17. 20`eme Congr`es Francais de Mecanique Besancon, 29 ao^ut au 2 septembre 2011 Forme et persistance de tourbillons lenticulaires dans les

    E-print Network

    Marcus, Philip S.

    20`eme Congr`es Fran¸cais de M´ecanique Besan¸con, 29 ao^ut au 2 septembre 2011 Forme et Jupiter : bandes altern´ees de forts vents zonaux superpos´ees `a des structures tourbillonnaires intenses astronomes depuis le 17`eme si`ecle. La GRS est une ´enorme structure anticyclonique de taille typique 25000

  18. Site symmetry of AO{sub 4} complexes (A are s- or p-elements of periods III and IV) in crystal structures

    SciTech Connect

    Serezhkin, V. N. Savchenkov, A. V.; Urusov, V. S.

    2010-03-15

    The symmetry of the sites occupied in crystal structures by 17 405 crystallographically different A atoms (A are s or p elements of periods III and IV) entering the composition of AO{sub 4}{sup z-} complexes has been analyzed. A periodicity in the ability of A atoms for implementing a certain site symmetry is established. Some features of the stereochemistry of A elements in the dependence of their position in the periodic table are discussed.

  19. 7`eme Congr`es Pan Africain de Mathematiques Yamoussoukro, C^ote d'Ivoire du 3 au 8 ao^ut 2009

    E-print Network

    Waldschmidt, Michel

    7`eme Congr`es Pan Africain de Math´ematiques Yamoussoukro, C^ote d'Ivoire du 3 au 8 ao^ut 2009 Nombres transcendants: r´esultats r´ecents et probl`emes ouverts Michel Waldschmidt Institut de Math´ematiques de Jussieu & Paris VI CIMPA Centre International de Math´ematiques Pures et Appliqu´ees http

  20. arXiv:1408.2487v2[physics.ao-ph]22Aug2014 Ising model for melt ponds on Arctic sea ice

    E-print Network

    Golden, Kenneth M.

    arXiv:1408.2487v2[physics.ao-ph]22Aug2014 Ising model for melt ponds on Arctic sea ice Yi-Ping Ma,1, USA The albedo of melting Arctic sea ice, a key parameter in climate modeling, is determined by pools correspond to the presence of melt water or ice on the sea ice surface. The model exhibits a second

  1. 19`eme Congr`es Francais de Mecanique Marseille, 24-28 ao^ut 2009 Qu'est-ce qui determine la taille des dunes?

    E-print Network

    Claudin, Philippe

    19`eme Congr`es Fran¸cais de M´ecanique Marseille, 24-28 ao^ut 2009 Qu'est-ce qui d´etermine la de Physique et M´ecanique des Milieux H´et´erog`enes (PMMH UMR 7636 CNRS-ESPCI-UPD-UPMC) 10 rue apport´ees `a ces questions dans nos r´ecents articles [5, 4, 1, 6, 2], o`u l'on trouvera le d´etail et

  2. New Extinction and Mass Estimates from Optical Photometry of the Very Low Mass Brown Dwarf Companion CT Chamaeleontis B with the Magellan AO System

    E-print Network

    Wu, Ya-Lin; Males, Jared R; Barman, Travis S; Morzinski, Katie M; Follette, Katherine B; Bailey, Vanessa; Rodigas, Timothy J; Hinz, Philip; Puglisi, Alfio; Xompero, Marco; Briguglio, Runa

    2015-01-01

    We used the Magellan adaptive optics (MagAO) system and its VisAO CCD camera to image the young low mass brown dwarf companion CT Chamaeleontis B for the first time at visible wavelengths. We detect it at r', i', z', and Ys. With our new photometry and Teff~2500 K derived from the shape its K-band spectrum, we find that CT Cha B has Av = 3.4+/-1.1 mag, and a mass of 14-24 Mj according to the DUSTY evolutionary tracks and its 1-5 Myr age. The overluminosity of our r' detection indicates that the companion has significant Halpha emission and a mass accretion rate ~6*10^-10 Msun/yr, similar to some substellar companions. Proper motion analysis shows that another point source within 2" of CT Cha A is not physical. This paper demonstrates how visible wavelength AO photometry (r', i', z', Ys) allows for a better estimate of extinction, luminosity, and mass accretion rate of young substellar companions.

  3. Characterization of PmfR, the Transcriptional Activator of the pAO1-Borne purU-mabO-folD Operon of Arthrobacter nicotinovorans

    PubMed Central

    Chiribau, Calin B.; Sandu, Cristinel; Igloi, Gabor L.; Brandsch, Roderich

    2005-01-01

    Nicotine catabolism by Arthrobacter nicotinovorans is linked to the presence of the megaplasmid pAO1. Genes involved in this catabolic pathway are arranged on the plasmid into gene modules according to function. During nicotine degradation ?-N-methylaminobutyrate is formed from the pyrrolidine ring of nicotine. Analysis of the pAO1 open reading frames (ORF) resulted in identification of the gene encoding a demethylating ?-N-methylaminobutyrate oxidase (mabO). This gene was shown to form an operon with purU- and folD-like genes. Only in bacteria grown in the presence of nicotine could transcripts of the purU-mabO-folD operon be detected, demonstrating that this operon constitutes part of the pAO1 nicotine regulon. Its transcriptional start site was determined by primer extension analysis. Transcription of the operon was shown to be controlled by a new transcriptional regulator, PmfR, the product of a gene that is transcribed divergently from the purU, mabO, and folD genes. PmfR was purified, and electromobility shift assays and DNase I-nuclease digestion experiments were used to determine that its DNA binding site is located between ?48 and ?88 nucleotides upstream of the transcriptional start site of the operon. Disruption of pmfR by homologous recombination with a chloramphenicol resistance cassette demonstrated that PmfR acts in vivo as a transcriptional activator. Mutagenesis of the PmfR target DNA suggested that the sequence GTTT-14 bp-AAAC is the core binding site of the regulator upstream of the ?35 promoter region of the purU-mabO-folD operon. PMID:15838033

  4. A thaumatin-like gene from Asparagus officinalis (AoPRT-L) exhibits slow activation following tissue maceration or salicylic acid treatment, suggesting convergent defence-related signalling in monocots.

    PubMed

    Darby, R M; Firek, S; Mur, L A; Draper, J

    2000-11-01

    Summary Messenger RNA derived from mechanically separated cells of asparagus has proved to be an enriched source of defence-related transcripts. We describe the characterization of a novel PR-5 gene coding for a secreted protein of neutral pI (AoPRT-L) that is strongly up-regulated following cell isolation or following accelerated tissue ageing caused by tissue maceration, but which is also responsive to salicylic acid, a defence-related signal not normally associated with wound responses. Infection with the necrotizing fungal pathogen Stemphylium vesicarium confirmed the responsiveness of AoPRT-L to pathogen challenge in intact plants. An upstream region of the AoPRT-L gene of less than 500 bp was sufficient to confer SA-inducibility in transgenic tobacco. The expression profile of AoPRT-L in both macerated and pathogen challenged tissue suggested there were complex, convergent signalling mechanisms operating during responses to these different stresses. PMID:20572983

  5. 17 `eme Congr`es Francais de Mecanique Troyes, 29 ao^ut 2 septembre 2005 La crise d'ebullition vue comme l'etalement des bulles sur la paroi

    E-print Network

    Nikolayev, Vadim S.

    17 `eme Congr`es Franc¸ais de M´ecanique Troyes, 29 ao^ut ­ 2 septembre 2005 La crise d;17 `eme Congr`es Franc¸ais de M´ecanique Troyes, 29 ao^ut ­ 2 septembre 2005 ligne de contact vapeur n gravit´e d´etache la bulle de la paroi. De nombreux articles [4, 5, 6] ont ´et´e consacr´es aux ´etudes

  6. Comparison of Clinical Outcomes of Phalangeal Fracture Treated with Dorsolateral Approach or Post-middle Approach Using AO Mini Titanium Plate.

    PubMed

    Li, Guang; Liu, Shen; Chen, Guoting; Li, Zengchun; Liu, Yangzhou; Sun, Guixin; Lu, Qingyou; Li, Xia; Tan, Jun; Guan, Ming

    2015-12-01

    The aim of this study is to investigate the clinical outcomes of various fixation methods for proximal phalangeal fractures with Arbeitsgemeinschaft für Osteosynthesefragen (AO) mini titanium plate by dorsolateral approach or post-middle approach. Clinical results of 62 fingers of 53 patients with proximal phalangeal fracture were evaluated. For dorsolateral approach, the lateral bundle of the extensor tendon was drawn away to expose the fracture part of the bone. After reduction, the plate was located at the dorsolateral side of the bone. For post-middle approach, the extensor tendon was split to expose the fracture part of the bone. After reduction, the plate was fixed to the proximal phalangeal side of the bone, and the extensor tendon was repaired with 3-0 nonabsorbable silk sutures. We found low overall complication rates in both groups. The mean total active motion (TAM) for the dorsolateral group and post-middle group was 234.60°?±?22.63° and 221.08°?±?25.69°, respectively. There was a statistical significance between the two groups (P?=?0.037?AO mini titanium plate, movement in dorsolateral approach group was significantly higher than in post-middle approach group. Dorsolateral approach is an acceptable technique of incision for proximal phalangeal fractures. PMID:26730082

  7. The a subunit of the A1AO ATP synthase of Methanosarcina mazei Gö1 contains two conserved arginine residues that are crucial for ATP synthesis.

    PubMed

    Gloger, Carolin; Born, Anna-Katharina; Antosch, Martin; Müller, Volker

    2015-01-01

    Like the evolutionary related F1FO ATP synthases and V1VO ATPases, the A1AO ATP synthases from archaea are multisubunit, membrane-bound transport machines that couple ion flow to the synthesis of ATP. Although the subunit composition is known for at least two species, nothing is known so far with respect to the function of individual subunits or amino acid residues. To pave the road for a functional analysis of A1AO ATP synthases, we have cloned the entire operon from Methanosarcina mazei into an expression vector and produced the enzyme in Escherichia coli. Inverted membrane vesicles of the recombinants catalyzed ATP synthesis driven by NADH oxidation as well as artificial driving forces. [Formula: see text] as well as ?pH were used as driving forces which is consistent with the inhibition of NADH-driven ATP synthesis by protonophores. Exchange of the conserved glutamate in subunit c led to a complete loss of ATP synthesis, proving that this residue is essential for H+ translocation. Exchange of two conserved arginine residues in subunit a has different effects on ATP synthesis. The role of these residues in ion translocation is discussed. PMID:25724672

  8. DIFFRACTION-LIMITED VISIBLE LIGHT IMAGES OF ORION TRAPEZIUM CLUSTER WITH THE MAGELLAN ADAPTIVE SECONDARY ADAPTIVE OPTICS SYSTEM (MagAO)

    SciTech Connect

    Close, L. M.; Males, J. R.; Morzinski, K.; Kopon, D.; Follette, K.; Rodigas, T. J.; Hinz, P.; Wu, Y-L.; Puglisi, A.; Esposito, S.; Riccardi, A.; Pinna, E.; Xompero, M.; Briguglio, R.; Uomoto, A; Hare, T.

    2013-09-10

    We utilized the new high-order (250-378 mode) Magellan Adaptive Optics system (MagAO) to obtain very high spatial resolution observations in ''visible light'' with MagAO's VisAO CCD camera. In the good-median seeing conditions of Magellan (0.''5-0.''7), we find MagAO delivers individual short exposure images as good as 19 mas optical resolution. Due to telescope vibrations, long exposure (60 s) r' (0.63 {mu}m) images are slightly coarser at FWHM = 23-29 mas (Strehl {approx}28%) with bright (R < 9 mag) guide stars. These are the highest resolution filled-aperture images published to date. Images of the young ({approx}1 Myr) Orion Trapezium {theta}{sup 1} Ori A, B, and C cluster members were obtained with VisAO. In particular, the 32 mas binary {theta}{sup 1} Ori C{sub 1} C{sub 2} was easily resolved in non-interferometric images for the first time. The relative positions of the bright trapezium binary stars were measured with {approx}0.6-5 mas accuracy. We are now sensitive to relative proper motions of just {approx}0.2 mas yr{sup -1} ({approx}0.4 km s{sup -1} at 414 pc)-this is a {approx}2-10 Multiplication-Sign improvement in orbital velocity accuracy compared to previous efforts. For the first time, we see clear motion of the barycenter of {theta}{sup 1} Ori B{sub 2} B{sub 3} about {theta}{sup 1} Ori B{sub 1}. All five members of the {theta}{sup 1} Ori B system appear likely to be a gravitationally bound ''mini cluster'', but we find that not all the orbits can be both circular and co-planar. The lowest mass member of the {theta}{sup 1} Ori B system (B{sub 4}; mass {approx}0.2 M{sub Sun }) has a very clearly detected motion (at 4.1 {+-} 1.3 km s{sup -1}; correlation = 99.9%) w.r.t. B{sub 1}. Previous work has suggested that B{sub 4} and B{sub 3} are on long-term unstable orbits and will be ejected from this ''mini cluster''. However, our new ''baseline'' model of the {theta}{sup 1} Ori B system suggests a more hierarchical system than previously thought, and so the ejection of B{sub 4} may not occur for many orbits, and B{sub 3} may be stable against ejection in the long-term. This ''ejection'' process of the lowest mass member of a ''mini cluster'' could play a major role in the formation of low-mass stars and brown dwarfs.

  9. A Worldwide Analysis of the Reliability and Perceived Importance of an Injury to the Posterior Ligamentous Complex in AO Type A Fractures.

    PubMed

    Schroeder, Gregory D; Kepler, Christopher K; Koerner, John D; Oner, F Cumhur; Fehlings, Michael G; Aarabi, Bizhan; Dvorak, Marcel F; Reinhold, Max; Kandziora, Frank; Bellabarba, Carlo; Chapman, Jens R; Vialle, Luiz R; Vaccaro, Alexander R

    2015-10-01

    Study Design?Survey of spine surgeons. Objective?To determine the reliability with which international spine surgeons identify a posterior ligamentous complex (PLC) injury in a patient with a compression-type vertebral body fracture (type A). Methods?A survey was sent to all AOSpine members from the six AO regions of the world. The survey consisted of 10 cases of type A fractures (2 subtype A1, 2 subtype A2, 3 subtype A3, and 3 subtype A4 fractures) with appropriate imaging (plain radiographs, computed tomography, and/or magnetic resonance imaging), and the respondent was asked to identify fractures with a PLC disruption, as well as to indicate if the integrity of the PLC would affect their treatment recommendation. Results?Five hundred twenty-nine spine surgeons from all six AO regions of the world completed the survey. The overall interobserver reliability in determining the integrity of the PLC was slight (kappa?=?0.11). No substantial regional or experiential difference was identified in determining PLC integrity or its absence; however, a regional difference was identified (p?

  10. A Worldwide Analysis of the Reliability and Perceived Importance of an Injury to the Posterior Ligamentous Complex in AO Type A Fractures

    PubMed Central

    Schroeder, Gregory D.; Kepler, Christopher K.; Koerner, John D.; Oner, F. Cumhur; Fehlings, Michael G.; Aarabi, Bizhan; Dvorak, Marcel F.; Reinhold, Max; Kandziora, Frank; Bellabarba, Carlo; Chapman, Jens R.; Vialle, Luiz R.; Vaccaro, Alexander R.

    2015-01-01

    Study Design?Survey of spine surgeons. Objective?To determine the reliability with which international spine surgeons identify a posterior ligamentous complex (PLC) injury in a patient with a compression-type vertebral body fracture (type A). Methods?A survey was sent to all AOSpine members from the six AO regions of the world. The survey consisted of 10 cases of type A fractures (2 subtype A1, 2 subtype A2, 3 subtype A3, and 3 subtype A4 fractures) with appropriate imaging (plain radiographs, computed tomography, and/or magnetic resonance imaging), and the respondent was asked to identify fractures with a PLC disruption, as well as to indicate if the integrity of the PLC would affect their treatment recommendation. Results?Five hundred twenty-nine spine surgeons from all six AO regions of the world completed the survey. The overall interobserver reliability in determining the integrity of the PLC was slight (kappa?=?0.11). No substantial regional or experiential difference was identified in determining PLC integrity or its absence; however, a regional difference was identified (p?

  11. An extreme-AO search for giant planets around a white dwarf. VLT/SPHERE performance on a faint target GD 50

    NASA Astrophysics Data System (ADS)

    Xu, S.; Ertel, S.; Wahhaj, Z.; Milli, J.; Scicluna, P.; Bertrang, G. H.-M.

    2015-07-01

    Context. Little is known about the planetary systems around single white dwarfs, although there is strong evidence that they do exist. Aims: We performed a pilot study with the extreme-AO system on the Spectro-Polarimetric High-contrast Exoplanet REsearch (SPHERE) on the Very Large Telescopes (VLT) to look for giant planets around a young white dwarf, GD 50. Methods: We were awarded science verification time on the new ESO instrument SPHERE. Observations were made with the InfraRed Dual-band Imager and Spectrograph in classical imaging mode in H band. Results: Despite the faintness of the target (14.2 mag in R band), the AO loop was closed and a strehl of 37% was reached in H band. No objects were detected around GD 50. We achieved a 5-sigma contrast of 6.2, 8.0, and 8.25 mag at 0.?2, 0.?4, and 0.?6 and beyond, respectively. We exclude any substellar objects more massive than 4.0 MJ at 6.2 au, 2.9 MJ at 12.4 au, and 2.8 MJ at 18.6 au and beyond. This rivals the previous upper limit set by Spitzer. We further show that SPHERE is the most promising instrument available to search for close-in substellar objects around nearby white dwarfs. Based on observations made with European Southern Observatory (ESO) telescopes at the La Silla Paranal Observatory under program 60.A-9373(A).Figure 4 is available in electronic form at http://www.aanda.org

  12. www.iutbayonne.univ-pau.fr DES ENTREPRISES ET

    E-print Network

    Greff, Isabelle

    gestion, analyste financier). · OPTION GMO (Gestion et Management des Organisations) : adjoint au : GCF OU GMO Séminaire de rentrée Initiation à la gestion Tutorat Stage de 3 semaines Approfondissement'ouverture UE2 - Mise en situation professionnelle OPTION GMO UE1 - Management des organisations Langues

  13. Direction Europe et International Email: dei@univ-brest.fr

    E-print Network

    Brest, Université de

    et sciences humaines ERASMUS Allemagne Brühl Université européenne de sciences appliquées Commerce et administration (programmes larges) IUT Quimper ERASMUS Allemagne Dresden Université des sciences appliquées de Dresde Agriculture IUT Brest ERASMUS Allemagne Dresden Université des sciences appliquées de Dresde

  14. Direction Europe international Email: dei@univ-brest.fr

    E-print Network

    Brest, Université de

    Plovdiv Université des technologies alimentaires Double diplôme ESIAB 2014 2018 Cameroun Douala Université de Douala Convention générale Toutes composantes 2012 2017 Cameroun Douala Université de Douala

  15. Direction Europe international Email: dei@univ-brest.fr

    E-print Network

    Brest, Université de

    2014 2018 Cameroun Douala Université de Douala Convention générale 2012 2017 Cameroun Douala Université de Douala Mobilité étudiante UFR Médecine 2012 2017 Cameroun Ngaoundéré Université de Ngaoundéré

  16. Sample-Driven Schema Mapping Univ. of Michigan, Ann Arbor

    E-print Network

    Cafarella, Michael J.

    the "professional kitchenware" designed for database experts. Director MyMovieInfo role name directorMovie title producer User manually refines correspondences. Movie join Writer on ... join Person on... Movie join Director on ... join Person on... User manually refines mapping structure. name director producer Avatar

  17. UNIvERsITY OF SAsIxrcHEwAN

    E-print Network

    Saskatchewan, University of

    , College of Graduate Studies and Research (CGSR) Date: January 6, 2015 Re: New Program Proposal -- Graduate · The proposal for the creation of a new Graduate Certificate of Proficiency in One Health · Consultation the creation of the new Graduate Certificate of Proficiency in One Health with a final motion to recommend

  18. Lehrgebiet Parallelitt & VLSI Univ.Prof. Dr. Jrg Keller

    E-print Network

    Keller, Jörg

    Studiengang Abgabe Betreuer Eric Lahr Algorithmische Analyse der S-Boxen des Data Encryption Standard im Systems am Beispiel der AIRBUS Deutschland GmbH B. Sc. Inf. 02/2005 Prof. Dr. J. Keller Daniel Meyer

  19. Infection Research Colloquium Univ.-Prof. Dr. Silja Wessler

    E-print Network

    Gugat, Martin

    -Lodron University of Salzburg "Targeting E-cadherin: Functional role of HtrA in Helicobacter pylori pathogenesis. Schuler Research Training Group 1071 Spokesman: Prof. Dr. B. Fleckenstein Graduate School Molecular Research Training Group 1660 Spokesman: Prof. Dr. H.-M. Jäck Research Training Group CRC 643 Spokesman

  20. Teaching applied optics at the Univ. of Minho

    NASA Astrophysics Data System (ADS)

    Costa, Manuel F. M.

    1995-10-01

    In this communication we make a brief presentation of the branch of Applied Optics of the University of Mihno's undergraduate course of Applied Physics. The course of Applied Physics began in the year 1988/89. Previously we had just a course devoted to the formation of future physics and chemistry teachers at high school level. The Applied Physics course specialized in Optics appeared due to the growth of the physics department and due to request from the industry. The Applied Physics course has two specialization's on the field of applied optics: Optometry; and Optics and Lasers. The topics covered in the two first years of the course ar common to the two branches. On the second semester of the third year the students must choose between either one. The number of students on the Optometry branch was usually almost four times the number of Applied Optics and Lasers students. Nevertheless this tendency is rapidly changing. A short analysis of the result obtained will be presented focusing on last couple of years' advances. Presented will also be the results of an inquest made on students's opinions about the quality of the course, and their own performance and expectations.

  1. Montana State UniverSity ONliNe Graduate certificate

    E-print Network

    Lawrence, Rick L.

    neighbors. Through assigned readings and videos, online conversations with fellow students, and creative, and are committed to delivering an outstanding online education and supporting student success. Faculty About Montana State University Montana State University is a world-class research university dedicated

  2. L'Univers en expansion et problèmes d'énergie

    E-print Network

    Moukaddem Nazih

    2012-10-09

    In this paper we first construct a mathematical model for the Universe expansion that started up with the original Big Bang. Next, we discuss the problematic of the mechanical and physical laws invariance regarding the spatial frame exchanges. We then prove the (theoretical) existence of a variable metric $g_t$, depending on time and satisfying to a simplified Einstein equation, so that all free ordinary trajectories are geodesics. This is done by considering the classical Galileo-Newtonian space and time relation, by using generalized Newtonian principles and adding the approved physical new ones (as covariance principle, Mach principle, the Einstein equivalence principle ...) in order to establish a new cosmological model of the dynamical Universe as being $(U(t))_{t\\geq 0}=(B_e(O,t),g_t)_{t\\geq 0}$, where $B_e(O,t)$ is the Euclidean ball of radius $t$ in $\\mathbb R^3$. The cosmological metric $g_t$ is totally determined, at time $t$, by the mass energy distribution $E_t(X)$ on $B_e(O,t)$. We study also the black holes phenomenon and we prove that the total and global cosmological energy distribution $E_t(X)$ satisfies to the wave equation whose solutions are characterized by pseudo-frequencies depending on time and related to the spectrum of the Dirichlet problem on the unit ball $B_e(O,1)$ for the Laplace-Beltrami operator -$\\Delta$. Our model is consistent in the sense that all Newtonian and classical physical laws are valid as particular cases in classical situations. Then, we show that all basic results of Modern Physics are still valid without using the second postulate of special relativity nor the uncertainty principle.

  3. http://iae.univ-pau.fr la formation

    E-print Network

    Greff, Isabelle

    ses compétences sur son terrain de travail. Ceci est une opportunité pour l'entreprise lui permettant - GESTION DES DÉMARCHES INNOVANTES Conduire un projet, c'est participer au développement de l'entreprise, encourager la créativité de ses acteurs et orchestrer le changement. Pour cela, il convient de s

  4. Page 1 of 1 Prof. N. Tansu, Lehigh Univ

    E-print Network

    Gilchrist, James F.

    , the physics of low-dimensional semiconductor (nanostructure), and MOCVD and device fabrications of III the theoretical and experimental aspects of the physics of semiconductor optoelectronics materials and devices), applied quantum mechanics (graduate), optoelectronics and photonics (graduate), physics of semiconductor

  5. J. Math. Sci. Univ. Tokyo 16 (2009), 269414.

    E-print Network

    Kawahigashi, Yasuyuki

    2009-01-01

    (), which has an extremely thin subregion Q() (see Fig.1-Fig.5 for typical examples). We also analyze of the details of the convergence (1.3) for the case of the Dumbbell shaped domain (cf. Fig.1, Fig.2, Fig.4). Arrieta #12;Spectra of Domains 271 Fig. 1. Dumbbell-shaped domain (2D) Fig. 2. Dumbbell-shaped domain (3D

  6. Paul Clavin Aix-Marseille Univ & CNRS, 13480 Marseille

    E-print Network

    Dauxois, Thierry

    thickness shock reaction! rate Neumann! state Up UN Ub TN Tu Tb T -1 p droite de Michelson-Rayleigh Hugoniot PLANAR SHOCK WAVE! !!!!!!!!!!!!INERT GAS D > au vp uN ,Poisson 1808, Stokes 1848, Rankine 1869, Hugoniot 1889, Rayleigh 1910 #12;FRESH MIXTURE! !!!!!!! AT REST

  7. 2207 CSS Bldg, Univ of Maryland College Park, MD 20742

    E-print Network

    Department of Physics Fall 2008 Topics in the Physics of Quantum Information. Teaching fellow (unofficial, Harvard University, Thesis: Novel Systems and Methods for Quantum Communication, Quantum Computation, and Quantum Simulation, Advisor: Mikhail D. Lukin. Jun '06 A.M. (Master of Arts) Physics, Harvard University

  8. 2207 CSS Bldg, Univ of Maryland College Park, MD 20742

    E-print Network

    2008 Topics in the Physics of Quantum Information. Teaching fellow (unofficial) at the Harvard, Harvard University, Thesis: Novel Systems and Methods for Quantum Communication, Quantum Computation, and Quantum Simulation, Advisor: Mikhail D. Lukin. Jun '06 A.M. (Master of Arts) Physics, Harvard University

  9. Proposition de cours M2 mathmatiques, Univ. Nice Sophia Antipolis

    E-print Network

    Vallette, Bruno

    'enseignement comprend une part de travaux pratiques (25% du volume horaire total des 4 cours) où l'évaluation du travail EDP non linéaires 1. Espaces de Sobolev (8 HTD): On introduira les espaces fondamentaux de la physique mathématique que sont les espaces de Sobolev: · Espaces de Sobolev Hs (Rd ). · Injections de Sobolev et

  10. Triangular covariance factorizations for. Ph.D. Thesis. - Calif. Univ.

    NASA Technical Reports Server (NTRS)

    Thornton, C. L.

    1976-01-01

    An improved computational form of the discrete Kalman filter is derived using an upper triangular factorization of the error covariance matrix. The covariance P is factored such that P = UDUT where U is unit upper triangular and D is diagonal. Recursions are developed for propagating the U-D covariance factors together with the corresponding state estimate. The resulting algorithm, referred to as the U-D filter, combines the superior numerical precision of square root filtering techniques with an efficiency comparable to that of Kalman's original formula. Moreover, this method is easily implemented and involves no more computer storage than the Kalman algorithm. These characteristics make the U-D method an attractive realtime filtering technique. A new covariance error analysis technique is obtained from an extension of the U-D filter equations. This evaluation method is flexible and efficient and may provide significantly improved numerical results. Cost comparisons show that for a large class of problems the U-D evaluation algorithm is noticeably less expensive than conventional error analysis methods.

  11. http://iae.univ-pau.fr INTERNATIONAL STUDENTS

    E-print Network

    Greff, Isabelle

    and finance - Bank and insurances - Public management - Health management - Information system management management and compared management · Health organization management · Entrepreneurship Faculty members : · 25 of Management within Pau University · Located on 2 campuses : Pau and Bayonne · Our mission : to develop Master

  12. Univ.-Prof. Dipl.-Ing. Dr. Wolfgang Woess

    E-print Network

    Woess, Wolfgang

    description http://www.math.tugraz.at/~woess/Proposal.pdf Starting with December 1st, 2008 (or at the earliest/873-7130 Fax +43 (0) 316/873-4507 woess@weyl.math.tu-graz.ac.at http://www.math.tugraz.at/~woess/ Institute of Mathematical Stucture Theory (MathC) PostDoc Position starting with December, 2008 at Institut für

  13. Acta Math. Univ. Comenianae Vol. (submitted to AMUC), pp. 110

    E-print Network

    Monneau, Régis

    SYNTHESIS (SHS) IN THE HIGH ACTIVATION ENERGY REGIME R. MONNEAU and G.S. WEISS Abstract. We derive the precise limit of SHS in the high activation energy scal- ing suggested by B.J. Matkowksy-G.I. Sivashinsky (SHS). In the case of high activation energy interesting phenomena like the instability of planar waves

  14. 15/Oct/2010 1Univ. Minnesota Seminar Interstellar Ices

    E-print Network

    Boogert, Adwin

    . Minnesota Seminar Greenberg et al. ApJ 455, L177 (1995): launched processed ice sample in earth orbit (polyoxymethylene, -(CH2-O)n- ·HMT (hexamethylenetetramine, C6H12N4) ·Amino acids (glycine) ·Urea (H2NCONH2) ·PAHs

  15. Research in elementary particle physics. [Ohio State Univ. , Columbus

    SciTech Connect

    Not Available

    1992-01-01

    Experimental and theoretical work on high energy physics is reviewed. Included are preparations to study high-energy electron-proton interactions at HERA, light-cone QCD, decays of charm and beauty particles, neutrino oscillation, electron-positron interactions at CLEO II, detector development, and astrophysics and cosmology.

  16. Koichi Okamoto, Keiji Yanai The Univ. of Electro-Communications

    E-print Network

    Yanai, Keiji

    kinds of typical items in Yakiniku Meat, Rice, Pumpkin, Bell pepper, Carrot Sharing a grill outdoor, Carrot, Pineapple... Eat some food items in one bite Pre-defined fixed calories is average calories #12

  17. Research in particle physics. [Dept. of Physics, Boston Univ

    SciTech Connect

    Whitaker, Scott J.

    1992-09-01

    Research accomplishments and current activities of Boston University researchers in high energy physics are presented. Principal areas of activity include the following: detectors for studies of electron[endash]positron annihilation in colliding beams; advanced accelerator component design, including the superconducting beam inflector, electrostatic quadrupoles, and the electrostatic muon kicker''; the detector for the MACRO (Monopole, Astrophysics, and Cosmic Ray Observatory) experiment; neutrino astrophysics and the search for proton decay; theoretical particle physics (electroweak and flavor symmetry breaking, hadron collider phenomenology, cosmology and astrophysics, new field-theoretic models, nonperturbative investigations of quantum field theories, electroweak interactions); measurement of the anomalous magnetic moment of the muon; calorimetry for the GEM experiment; and muon detectors for the GEM experiment at the Superconducting Super Collider.

  18. Nuclear structure studies with medium energy probes. [Northwestern Univ

    SciTech Connect

    Seth, Kamal K.

    1980-01-01

    Progress in the continuing program of experimental research in nuclear structure with medium-energy probes during the year 1979-1980 is reviewed, and the research activities planned for the year 1980-1981 are discussed. In the study of pion-induced reactions emphasis is placed on investigation of isovector characteristics of nuclear excitations and on double charge exchange reactions. Pion production studies form the major part of the program of experiments with proton beams of 400 to 800 MeV at LAMPF. Current emphasis is on the bearing of these investigations on di-baryon existence. The study of high-spin states and magnetic scattering constitute the main goals of the electron scattering program at Bates. Representative results are presented; completed work is reported in the usual publications. (RWR)

  19. Comparative effectiveness of Di'ao Xin Xue Kang capsule and Compound Danshen tablet in patients with symptomatic chronic stable angina.

    PubMed

    Yu, Yanan; Hu, Siyuan; Li, Guoxin; Xue, Jie; Li, Zhuoming; Liu, Xiangling; Yang, Xiyan; Dong, Bo; Wang, Donghai; Wang, Xiaofeng; Liu, Shurong; Liu, Jun; Chen, Bingwei; Wang, Liying; Liu, Songshan; Chen, Qiguang; Shen, Chunti; Wang, Zhong; Wang, Yongyan

    2014-01-01

    A high proportion of patients with stable angina remains symptomatic despite multiple treatment options. Di'ao Xinxuekang (XXK) capsule and Compound Danshen (CDS) tablet have been approved for treating angina pectoris for more than 20 years in China. We compare the anti-anginal effectiveness of XXK capsule and CDS tablet in patients with symptomatic chronic stable angina. A randomized, multicenter, double-blind, parallel-group, superiority trial was conducted in 4 study sites. 733 patients with symptomatic chronic stable angina were included in the full analysis set. The primary outcomes were the proportion of patients who were angina-free and the proportion of patients with normal electrocardiogram (ECG) recordings during 20 weeks treatment. Compared with CDS, XXK significantly increased the proportion of angina-free patients, but no significant difference was noted in the proportion of patients with normal ECG recordings. Weekly angina frequency and nitroglycerin use were significantly reduced with XXK versus CDS at week 20. Moreover, XXK also improved the quality of life of angina patients as measured by the SAQ score and Xueyu Zheng (a type of TCM syndrome) score. We demonstrate that XXK capsule is more effective for attenuating anginal symptoms and improving quality of life in patients with symptomatic chronic stable angina, compared with CDS tablet. PMID:25394847

  20. Long-term monitoring of the blazars AO 0235+164 and S5 0716+714 in the optical and radio ranges

    NASA Astrophysics Data System (ADS)

    Bychkova, V. S.; Vol'vach, A. E.; Kardashev, N. S.; Larionov, M. G.; Vlasyuk, V. V.; Spiridonova, O. I.; Vol'vach, L. N.; Lähteenmäki, A.; Tornikoski, M.; Aller, M. F.; Aller, H. D.

    2015-09-01

    Long-term, multi-frequency optical and radio monitoring data for the Active Galactic Nuclei (AGNs) AO 0235+164 and S5 0716+714 are used to derive the characteristics of their radiation on time scales from hours to decades. Structure-function and harmonic analyses are carried out to determine the parameters of the radiation of these AGNs and explain their physical characteristics. Periodic components that could be associated with the motion of companions along an orbit in a close binary system of two supermassive black holes are identified. Both of the analysis methods used yield consistent results for the harmonic components. The results obtained are consistent with the idea that we are viewing systems of two supermassive black holes in a stage of their evolution that is close to coalescence. The substantial energy release of these AGNs can be interpreted as dynamical losses arising during the motion of the companion about the common center of gravity in a dense accreting medium, sometimes crossing through the accretion disk.

  1. Back-thrusting response of continental collision: Early Cretaceous NW-directed thrusting in the Changle-Nan'ao belt (Southeast China)

    NASA Astrophysics Data System (ADS)

    Wei, Wei; Faure, Michel; Chen, Yan; Ji, Wenbin; Lin, Wei; Wang, Qingchen; Yan, Quanren; Hou, Quanlin

    2015-03-01

    The SE coastal area of the South China Block (SCB) is generally interpreted as a Cretaceous active continental margin due to subduction of the Paleo-Pacific plate beneath the Eurasian plate. There, the NE-SW striking Changle-Nan'ao belt was previously considered as a major strike-slip fault zone with a large displacement accommodating the northward subduction of the Paleo-Pacific plate. Our new field and laboratory investigations document a NW-directed ductile thrust zone that placed gneiss upon Early Cretaceous foliated volcanic rocks. Structural analyses and Anisotropy of Magnetic Susceptibility results indicate that the ductile fabrics in both units are represented by a NE-SW striking foliation and a NW-SE stretching lineation with top-to-the-NW shear sense. This deformation occurred at ca. 130-105 Ma, before the deposition of undeformed (ca. 104 Ma) volcanic rocks, and the intrusion of ca. 90 Ma isotropic plutons. This continent-ward structure is tentatively interpreted as a back-thrust resulting of the collision of the West Philippines microcontinent with the SCB rather than an effect of a simple oceanic subduction.

  2. Effect of sludge-fly ash ceramic particles (SFCP) on synthetic wastewater treatment in an A/O combined biological aerated filter.

    PubMed

    Han, Shuxin; Yue, Qinyan; Yue, Min; Gao, Baoyu; Zhao, Yaqin; Cheng, Wenjing

    2009-02-01

    Novel media-sludge-fly ash ceramic particles (SFCP) employed in an upflow lab-scale A/O BAF were investigated for synthetic wastewater treatment. The influences of hydraulic retention time (HRT), air-liquid ratio (A/L) and recirculation on the removals of chemical oxygen demand (CODcr), ammonia (NH(4)(+)-N) and total nitrogen (TN) were discussed. The optimum operation conditions were obtained as HRT of 2.0 h, A/L of 15:1 and 200% recirculation. Under the optimal conditions, 90% CODcr, more than 98% NH(3)-N and approximately 70% TN were removed. The average consumed volumetric loading rates for CODcr, NH(4)(+)-N and TN with 200% recirculation were 4.06, 0.36 and 0.29 kg(m(3)d)(-1), respectively. The CODcr and TN removal mainly occurred in the anoxic zone, while nitrification was completed at the height of 70 cm from the inlet of the bottom due to a suitable column layout of biological aerated filter (BAF). The characteristics of wastewater and backwashing affected TN removal to a large degree. In addition, the features of media (SFCP) and synthetic wastewater contributed to a strong buffer capacity in the BAF system so that the effluent pH at different media height fluctuated slightly and was insensitive to recirculation. PMID:18828988

  3. OGLE-2012-BLG-0563Lb: a Saturn-mass Planet around an M Dwarf with the Mass Constrained by Subaru AO imaging

    E-print Network

    Fukui, A; Sumi, T; Bennett, D P; Bond, I A; Han, C; Suzuki, D; Beaulieu, J -P; Batista, V; Udalski, A; Street, R A; Tsapras, Y; Hundertmark, M; Abe, F; Freeman, M; Itow, Y; Ling, C H; Koshimoto, N; Masuda, K; Matsubara, Y; Muraki, Y; Ohnishi, K; Philpott, L C; Rattenbury, N; Saito, T; Sullivan, D J; Tristram, P J; Yonehara, A; Choi, J -Y; Christie, G W; DePoy, D L; Dong, Subo; Drummond, J; Gaudi, B S; Hwang, K -H; Kavka, A; Lee, C U; McCormick, J; Natusch, T; Ngan, H; Park, H; Pogge, R W; Shin, I-G; Tan, T -G; Yee, J C; Szyma?ski, M K; Pietrzy?ski, G; Soszy?ski, I; Poleski, R; Koz?owski, S; Pietrukowicz, P; Ulaczyk, K; Bramich, ? Wyrzykowski D M; Browne, P; Dominik, M; Horne, K; Ipatov, S; Kains, N; Snodgrass, C; Steele, I A

    2015-01-01

    We report the discovery of a microlensing exoplanet OGLE-2012-BLG-0563Lb with the planet-star mass ratio ~1 x 10^{-3}. Intensive photometric observations of a high-magnification microlensing event allow us to detect a clear signal of the planet. Although no parallax signal is detected in the light curve, we instead succeed at detecting the flux from the host star in high-resolution JHK'-band images obtained by the Subaru/AO188 and IRCS instruments, allowing us to constrain the absolute physical parameters of the planetary system. With the help of a spectroscopic information of the source star obtained during the high-magnification state by Bensby et al. (2013), we find that the lens system is located at 1.3^{+0.6}_{-0.8} kpc from us, and consists of an M dwarf (0.34^{+0.12}_{-0.20} M_sun) orbited by a Saturn-mass planet (0.39^{+0.14}_{-0.23} M_Jup) at the projected separation of 0.74^{+0.26}_{-0.42} AU (close model) or 4.3^{+1.5}_{-2.5} AU (wide model). The probability of contamination in the host star's flux...

  4. Summary Report of the First International Symposium on Strain Gauge Balances and Workshop on AoA/Model Deformation Measurement Techniques

    NASA Technical Reports Server (NTRS)

    Tripp, John S.; Tcheng, Ping; Burner, Alpheus W.; Finley, Tom D.

    1998-01-01

    The first International Symposium on Strain Gauge Balances was sponsored under the auspices of the NASA Langley Research Center (LaRC), Hampton, Virginia. Held at the LaRC Reid Conference Center, the Symposium provided an open international forum for presentation, discussion, and exchange of technical information among wind tunnel test technique specialists and strain gauge balance designers. The Symposium also served to initiate organized professional activities among the participating and relevant international technical communities. The program included a panel discussion, technical paper sessions, tours of local facilities, and vendor exhibits. Over 130 delegates were in attendance from 15 countries. A steering committee was formed to plan a second international balance symposium tentatively scheduled to be hosted in the United Kingdom in 1998 or 1999. The Balance Symposium was followed bv the half-day, Workshop on Angle of Attack and Model Deformation on the afternoon of October 25. The thrust of the Workshop was to assess the state of the art in angle of attack (AoA) and model deformation measurement techniques and to discuss future developments.

  5. Summary Report of the First International Symposium on Strain Gauge Balances and Workshop on AoA/Model Deformation Measurement Techniques

    NASA Technical Reports Server (NTRS)

    Tripp, John S.; Tcheng, Ping; Burner, Alpheus W.; Finley, Tom D.

    1999-01-01

    The first International Symposium on Strain Gauge Balances was sponsored under the auspices of the NASA Langley Research Center (LaRC), Hampton, Virginia during October 22-25, 1996. Held at the LaRC Reid Conference Center, the Symposium provided an open international forum for presentation, discussion, and exchange of technical information among wind tunnel test technique specialists and strain gauge balance designers. The Symposium also served to initiate organized professional activities among the participating and relevant international technical communities. The program included a panel discussion, technical paper sessions, tours of local facilities, and vendor exhibits. Over 130 delegates were in attendance from 15 countries. A steering committee was formed to plan a second international balance symposium tentatively scheduled to be hosted in the United Kingdom in 1998 or 1999. The Balance Symposium was followed by the half-day Workshop on Angle of Attack and Model Deformation on the afternoon of October 25. The thrust of the Workshop was to assess the state of the art in angle of attack (AoA) and model deformation measurement techniques and to discuss future developments.

  6. New Extinction and Mass Estimates from Optical Photometry of the Very Low Mass Brown Dwarf Companion CT Chamaeleontis B with the Magellan AO System

    NASA Astrophysics Data System (ADS)

    Wu, Ya-Lin; Close, Laird M.; Males, Jared R.; Barman, Travis S.; Morzinski, Katie M.; Follette, Katherine B.; Bailey, Vanessa; Rodigas, Timothy J.; Hinz, Philip; Puglisi, Alfio; Xompero, Marco; Briguglio, Runa

    2015-03-01

    We used the Magellan adaptive optics system and its VisAO CCD camera to image the young low mass brown dwarf companion CT Chamaeleontis B for the first time at visible wavelengths. We detect it at r', i', z', and YS . With our new photometry and T eff ~ 2500 K derived from the shape of its K-band spectrum, we find that CT Cha B has AV = 3.4 ± 1.1 mag, and a mass of 14-24 MJ according to the DUSTY evolutionary tracks and its 1-5 Myr age. The overluminosity of our r' detection indicates that the companion has significant H? emission and a mass accretion rate ~6 × 10-10 M ? yr-1, similar to some substellar companions. Proper motion analysis shows that another point source within 2'' of CT Cha A is not physical. This paper demonstrates how visible wavelength adaptive optics photometry (r', i', z', YS ) allows for a better estimate of extinction, luminosity, and mass accretion rate of young substellar companions. This paper includes data gathered with the 6.5 m Magellan Clay Telescope at Las Campanas Observatory, Chile.

  7. MagAO Imaging of Long-period Objects (MILO). I. A Benchmark M Dwarf Companion Exciting a Massive Planet around the Sun-like Star HD 7449

    E-print Network

    Rodigas, Timothy J; Faherty, Jackie; Anglada-Escude, Guillem; Kaib, Nathan; Butler, R Paul; Shectman, Stephen; Weinberger, Alycia; Males, Jared R; Morzinski, Katie M; Close, Laird M; Hinz, Philip M; Crane, Jeffrey D; Thompson, Ian; Teske, Johanna; Diaz, Matias; Minniti, Dante; Lopez-Morales, Mercedes; Adams, Fred C; Boss, Alan P

    2015-01-01

    We present high-contrast Magellan adaptive optics (MagAO) images of HD 7449, a Sun-like star with one planet and a long-term radial velocity (RV) trend. We unambiguously detect the source of the long-term trend from 0.6-2.15 \\microns ~at a separation of \\about 0\\fasec 54. We use the object's colors and spectral energy distribution to show that it is most likely an M4-M5 dwarf (mass \\about 0.1-0.2 \\msun) at the same distance as the primary and is therefore likely bound. We also present new RVs measured with the Magellan/MIKE and PFS spectrometers and compile these with archival data from CORALIE and HARPS. We use a new Markov chain Monte Carlo procedure to constrain both the mass ($> 0.17$ \\msun ~at 99$\\%$ confidence) and semimajor axis (\\about 18 AU) of the M dwarf companion (HD 7449B). We also refine the parameters of the known massive planet (HD 7449Ab), finding that its minimum mass is $7.8^{+3.7}_{-1.35}$ \\mj, its semimajor axis is $2.33^{+0.01}_{-0.02}$ AU, and its eccentricity is $0.8^{+0.08}_{-0.06}$. ...

  8. Comparative Effectiveness of Di'ao Xin Xue Kang Capsule and Compound Danshen Tablet in Patients With Symptomatic Chronic Stable Angina

    PubMed Central

    Yu, Yanan; Hu, Siyuan; Li, Guoxin; Xue, Jie; Li, Zhuoming; Liu, Xiangling; Yang, Xiyan; Dong, Bo; Wang, Donghai; Wang, Xiaofeng; Liu, Shurong; Liu, Jun; Chen, Bingwei; Wang, Liying; Liu, Songshan; Chen, Qiguang; Shen, Chunti; Wang, Zhong; Wang, Yongyan

    2014-01-01

    A high proportion of patients with stable angina remains symptomatic despite multiple treatment options. Di'ao Xinxuekang (XXK) capsule and Compound Danshen (CDS) tablet have been approved for treating angina pectoris for more than 20 years in China. We compare the anti-anginal effectiveness of XXK capsule and CDS tablet in patients with symptomatic chronic stable angina. A randomized, multicenter, double-blind, parallel-group, superiority trial was conducted in 4 study sites. 733 patients with symptomatic chronic stable angina were included in the full analysis set. The primary outcomes were the proportion of patients who were angina-free and the proportion of patients with normal electrocardiogram (ECG) recordings during 20 weeks treatment. Compared with CDS, XXK significantly increased the proportion of angina-free patients, but no significant difference was noted in the proportion of patients with normal ECG recordings. Weekly angina frequency and nitroglycerin use were significantly reduced with XXK versus CDS at week 20. Moreover, XXK also improved the quality of life of angina patients as measured by the SAQ score and Xueyu Zheng (a type of TCM syndrome) score. We demonstrate that XXK capsule is more effective for attenuating anginal symptoms and improving quality of life in patients with symptomatic chronic stable angina, compared with CDS tablet. PMID:25394847

  9. Proceedings of the 9th Brazilian Symposium in Information and Human Language Technology, pages 205209, Fortaleza, CE, Brazil, October 2123, 2013. c 2013 Sociedade Brasileira de Computac~ao

    E-print Network

    ,aveiga,saracandeias,fp}@co.it.pt Abstract. One of the frequent symptoms of Parkinson's disease (PD) is a progressive dysarthria¸c~ao Acoustic, Phonetic and Prosodic Features of Parkinson's disease Speech Jorge Proença1 , Arlindo Veiga1. 1. Introduction Parkinson is a type of degenerative disease of the central nervous system

  10. Secretariado do IPCC, aos cuidados da OMM, 7bis, Avenue de la Paix, C.P. N 2300, 1211 Genebra 2, SUA Telefone: +41 22 730 8208/8254/8284 Fax: +41 22 730 8025/8013

    E-print Network

    Secretariado do IPCC, aos cuidados da OMM, 7bis, Avenue de la Paix, C.P. Nº 2300, 1211 Genebra 2, SUÍÇA Telefone: +41 22 730 8208/8254/8284 Fax: +41 22 730 8025/8013 E-mail: IPCC-Sec@wmo.int Website: http://www.ipcc.ch OMM PAINEL INTERGOVERNAMENTAL SOBRE MUDANÇA DO CLIMA PNUMA Mudança do Clima 2007

  11. Proceedings of the 9th Brazilian Symposium in Information and Human Language Technology, pages 194198, Fortaleza, CE, Brazil, October 2123, 2013. c 2013 Sociedade Brasileira de Computac~ao

    E-print Network

    a extrac¸~ao de vocabul´ario multil´ingue (portugu^es-ingl^es) a partir de um corpus paralelo composto por¸as) para ingl^es, sendo considerado como de tamanho mediano de acordo com padr~oes lingu´isticos. 3

  12. Proceedings of the 9th Brazilian Symposium in Information and Human Language Technology, pages 153157, Fortaleza, CE, Brazil, October 2123, 2013. c 2013 Sociedade Brasileira de Computac~ao

    E-print Network

    , verbos, adjetivos e adv´erbios em ingl^es, or- ganizados em grupos de sin^onimos, denominados Syn traduc¸~ao da l´ingua em que se trabalha para o Ingl^es, para assim usar as APIs dispon´iveis para

  13. Magellan Adaptive Optics first-light observations of the exoplanet beta Pic b. II. 3-5 micron direct imaging with MagAO+Clio, and the empirical bolometric luminosity of a self-luminous giant planet

    E-print Network

    Morzinski, Katie M; Skemer, Andy J; Close, Laird M; Hinz, Phil M; Rodigas, T J; Puglisi, Alfio; Esposito, Simone; Riccardi, Armando; Pinna, Enrico; Xompero, Marco; Briguglio, Runa; Bailey, Vanessa P; Follette, Katherine B; Kopon, Derek; Weinberger, Alycia J; Wu, Ya-Lin

    2015-01-01

    Young giant exoplanets are a unique laboratory for understanding cool, low-gravity atmospheres. A quintessential example is the massive extrasolar planet $\\beta$ Pic b, which is 9 AU from and embedded in the debris disk of the young nearby A6V star $\\beta$ Pictoris. We observed the system with first light of the Magellan Adaptive Optics (MagAO) system. In Paper I we presented the first CCD detection of this planet with MagAO+VisAO. Here we present four MagAO+Clio images of $\\beta$ Pic b at 3.1 $\\mu$m, 3.3 $\\mu$m, $L^\\prime$, and $M^\\prime$, including the first observation in the fundamental CH$_4$ band. To remove systematic errors from the spectral energy distribution (SED), we re-calibrate the literature photometry and combine it with our own data, for a total of 22 independent measurements at 16 passbands from 0.99--4.8 $\\mu$m. Atmosphere models demonstrate the planet is cloudy but are degenerate in effective temperature and radius. The measured SED now covers $>$80\\% of the planet's energy, so we approach ...

  14. COMPARISON OF TRAP STATES BETWEEN CIGSS/CdS/ZnO AND Cd PE CIGSS/ZnO CELLS P.K. Johnson, A.O. Pudov, J.R. Sites

    E-print Network

    Sites, James R.

    (CIGS) thin films were treated in Cd solutions (Cd PE treatment) yielded solar cells with efficienciesCOMPARISON OF TRAP STATES BETWEEN CIGSS/CdS/ZnO AND Cd PE CIGSS/ZnO CELLS P.K. Johnson, A.O. Pudov, J.R. Sites Department of Physics, Colorado State University Fort Collins, CO 80523-1875, U

  15. Adaptac~ao ao Contexto em Sistemas de Comunicac~ao Heterogeneos

    E-print Network

    Rodrigues, Luís E.T.

    . Considerem-se por exemplo aplicac¸ ~oes cooperativas multi-utilizador tais como os jogos em rede ou aplicac¸~oes cooperativas multi-utilizador (tais como os jogos on-line). Embora a maioria das concretizac¸~oes actuais destes jogos se baseiem em arquitecturas cliente-servidor, foram j´a de- Este trabalho foi

  16. On the Location of the gamma-Ray Outburst Emission in the BL Lacertae Object AO 0235 + 164 Through Observations Across the Electromagnetic Spectrum

    NASA Technical Reports Server (NTRS)

    Agudo, Ivan; Marscher, Alan P.; Jorstad, Svetlana G.; Larionov, Valeri M.; Gomez, Jose L.; Laehteenmaeki, Anne; Smith, Paul S.; Nilsson, Kari; Readhead, Anthony C. S.; Aller, Margo F.; Heidt, Jochien; Gurwell, Mark; Thum, Clemens; Wehrle, Ann E.; Nikolashvili, Maria G.; Aller, Hugh D.; Benitez, Erika; Blinov, Dmitriy A.; Hagen-Thorn, Vladimir A.; Hiriart, David; Jannuzi, Buell T.; Joshi, Manasvita; Kimeridze, Givi N.; Kurtanidze, Omar M.; Kurtanidze, Sofia O.

    2011-01-01

    We present observations of a major outburst at centimeter, millimeter, optical, X-ray, and gamma-ray wavelengths of the BL Lacertae object AO 0235+164. We analyze the timing of multi-waveband variations in the flux and linear polarization, as well as changes in Very Long Baseline Array images at A = 7 mm with approx.0.15 milliarcsec resolution. The association of the events at different wavebands is confirmed at high statistical significance by probability arguments and Monte Carlo simulations. A series of sharp peaks in optical linear polarization, as well as a pronounced maximum in the 7 mm polarization of a superluminal jet knot, indicate rapid fluctuations in the degree of ordering of the magnetic field. These results lead us to conclude that the outburst occurred in the jet both in the quasi-stationary "core" and in the superluminal knot, both parsecs downstream of the supermassive black hole. We interpret the outburst as a consequence of the propagation of a disturbance, elongated along the line of sight by light-travel time delays, that passes through a standing recollimation shock in the core and propagates down the jet to create the superluminal knot. The multi-wavelength light curves vary together on long timescales (months/ years), but the correspondence is poorer on shorter timescales. This, as well as the variability of the polarization and the dual location of the outburst, agrees with the expectations of a multi-zone emission model in which turbulence plays a major role in modulating the synchrotron and inverse Compton fluxes.

  17. SPHERE eXtreme AO control scheme: final performance assessment and on sky validation of the first auto-tuned LQG based operational system

    NASA Astrophysics Data System (ADS)

    Petit, C.; Sauvage, J.-F.; Fusco, T.; Sevin, A.; Suarez, M.; Costille, A.; Vigan, A.; Soenke, C.; Perret, D.; Rochat, S.; Barrufolo, A.; Salasnich, B.; Beuzit, J.-L.; Dohlen, K.; Mouillet, D.; Puget, P.; Wildi, F.; Kasper, M.; Conan, J.-M.; Kulcsár, C.; Raynaud, H.-F.

    2014-08-01

    The SPHERE (Spectro-Polarimetry High-contrast Exoplanet Research) instrument is an ESO project aiming at the direct detection of extra-solar planets. SPHERE has been successfully integrated and tested in Europe end 2013 and has been re-integrated at Paranal in Chile early 2014 for a first light at the beginning of May. The heart of the SPHERE instrument is its eXtreme Adaptive Optics (XAO) SAXO (SPHERE AO for eXoplanet Observation) subsystem that provides extremely high correction of turbulence and very accurate stabilization of images for coronagraphic purpose. However, SAXO, as well as the overall instrument, must also provide constant operability overnights, ensuring robustness and autonomy. An original control scheme has been developed to satisfy this challenging dichotomy. It includes in particular both an Optimized Modal Gain Integrator (OMGI) to control the Deformable Mirror (DM) and a Linear Quadratic Gaussian (LQG) control law to manage the tip-tilt (TT) mirror. LQG allows optimal estimation and prediction of turbulent angle of arrival but also of possible vibrations. A specific and unprecedented control scheme has been developed to continuously adapt and optimize LQG control ensuring a constant match to turbulence and vibrations characteristics. SPHERE is thus the first operational system implementing LQG, with automatic adjustment of its models. SAXO has demonstrated performance beyond expectations during tests in Europe, in spite of internal limitations. Very first results have been obtained on sky last May. We thus come back to SAXO control scheme, focusing in particular on the LQG based TT control and the various upgrades that have been made to enhance further the performance ensuring constant operability and robustness. We finally propose performance assessment based on in lab performance and first on sky results and discuss further possible improvements.

  18. Temperature dependence of alkali-metal rattling dynamics in the ?-pyrochlores, AOs2O6 (A = K, Rb, Cs), from MD simulation.

    PubMed

    Shoko, E; Peterson, V K; Kearley, G J

    2014-06-11

    We investigate the temperature response of the alkali-metal rattling modes in ?-pyrochlores, AOs2O6 (A = K, Rb, Cs), from the results of ab initio molecular dynamics (MD) simulations performed at 20?K, 100?K and 300?K. Our results show that the temperature response of the T1u mode is clearly different from that of the T2g mode for all three pyrochlores. In this regard, two features are of particular note for both K and Rb; (1) the T1u mode exhibits a distinctly stronger softening response with decreasing temperature compared to the T2g mode, and (2) the T1u mode becomes stronger and sharper with decreasing temperature. These two findings suggest that the T1u mode is significantly more anharmonic and sensitive to the cage dynamics than the T2g mode. Examination of the local potentials around the alkali-metal atoms reveals that K has the flattest and most anharmonic potential at all temperatures while Cs exhibits the narrowest potential. The temperature dependence of the local potentials reveals that, for K, the potential at a higher temperature is not a simple extrapolation to higher energy of that at a lower temperature. Instead, we find significant reconstruction of the potential at different temperatures. Finally, we explore the temperature response of the coupling between the alkali metals and find a complex temperature dependence which suggests that the origin of the coupling may be more complex than a pure Coulomb interaction. We also find an unexpected increase in the static disorder of the system at low temperatures for the K and Rb pyrochlores. PMID:24832480

  19. Using UPLC-QTOF-MS to analyze the chemical changes between traditional and dispensing granule decoctions of San-Ao-Tang.

    PubMed

    Ma, Chunhua; Qian, Yefei; Fan, Xinsheng; Shang, ErXin; Yao, Xin; Ma, Shiping

    2014-04-01

    In the present study, a chemical profiling approach based on ultra-performance liquid chromatography coupled with photodiode array detection and time-of-flight mass spectrometry (UPLC-PDA-TOF-MS) was proposed to rapidly evaluate the chemical consistency between traditional and dispensing granule decoctions of traditional medicine combinatorial formulae and validated using San-Ao-Tang (SAT) as a model combinatorial formula. SAT is an effective traditional Chinese medicine, which is usually used in treating asthma and other diseases of the respiratory system. Two decoctions were prepared: traditional decoction, which is a water extract of three mixed constituent herbs of SAT; and dispensing granule decoction, which is a mixed water extract of each individual herb of SAT. Batches of these two decoction samples were subjected to UPLC-PDA-TOF-MS analysis and the data sets of t(R)-m/z pairs, ion intensities and sample codes were processed with supervised orthogonal partial least squared discriminant analysis to holistically compare their differences. Once a clear classification trend was found in the score plot, further statistics were performed to generate points at the two ends of S, and the components that correlated to these ions were regarded as the most changed components during decoction of the combinatorial formula. The changed components were identified by comparing the mass/ultraviolet spectra and retention times with those of reference compounds and/or tentatively assigned by matching empirical molecular formulae with those of the known compounds published in the literature. Using the proposed approach, global chemical differences were found between traditional and dispensing granule decoctions, like ephedrine, pseudoephedrine, norpseudoephedrine, licorice saponine H2, licorice saponine G2 and amygdalin. PMID:23572319

  20. Processes controlling the seasonal and spatial variations in sulfate profiles in the pore water of the sediments surrounding Qi'ao Island, Pearl River Estuary, Southern China

    NASA Astrophysics Data System (ADS)

    Wu, Zijun; Zhou, Huaiyang; Ren, Dezhang; Gao, Hang; Li, Jiangtao

    2015-04-01

    Marine sediments are the main sink for seawater sulfate and bacterial sulfate reduction is a major component of the global sulfur cycle. Nevertheless, the factors controlling sulfate reduction in the coastal estuary sediments that undergo spatial and temporal variations are still not fully understood. In this study, we measured the concentrations of SO42-, Cl-, CH4, and DIC, and the ?13C of DIC in the pore water of five sampling stations surrounding the Qi'ao Island, Pearl River Estuary, Southern China during the dry season in November 2011 and during the wet season in May 2012. The results showed that the dilution-mixing of the Pearl River with low-concentration sulfate significantly affects the downcore profiles of the sulfate concentrations in the pore water of these estuary sediments. During the wet season, the dilution-mixing of the layers from the top of the sediments to a depth of 14-18 cm occurred at the different sampling stations. In this layer, the sulfate reduction is not appreciable based on the plot of the pore water Cl- and SO42-. Below the dilution-mixing layers, however, sulfate reduction that is driven by the anaerobic oxidation of methane (AOM) occurs. In our comparison, it appeared that the AOM played more important role in the consumption of the pore water sulfate in May 2012 than in November 2011. Meanwhile, we observed a relatively good correlation (r2=0.64) between the depth of the sulfate-methane interface (SMI) and the sulfate concentration in the pore water of the top sediments in dry season, indicating that the pore water sulfate concentration appears to be a primary controlling factor for the depth of the SMI in this estuary. These results highlight the need for an integrated analysis of the hydrologically driven the variations in the sulfate profiles to improve our understanding of the biogeochemical cycling of C, Fe and S and their budgets in estuarine environments.

  1. Application of 'Six Sigma{sup TM}' and 'Design of Experiment' for Cementation - Recipe Development for Evaporator Concentrate for NPP Ling AO, Phase II (China) - 12555

    SciTech Connect

    Fehrmann, Henning; Perdue, Robert

    2012-07-01

    Cementation of radioactive waste is a common technology. The waste is mixed with cement and water and forms a stable, solid block. The physical properties like compression strength or low leach ability depends strongly on the cement recipe. Due to the fact that this waste cement mixture has to fulfill special requirements, a recipe development is necessary. The Six Sigma{sup TM}' DMAIC methodology, together with the Design of experiment (DoE) approach, was employed to optimize the process of a recipe development for cementation at the Ling Ao nuclear power plant (NPP) in China. The DMAIC offers a structured, systematical and traceable process to derive test parameters. The DoE test plans and statistical analysis is efficient regarding the amount of test runs and the benefit gain by getting a transfer function. A transfer function enables simulation which is useful to optimize the later process and being responsive to changes. The DoE method was successfully applied for developing a cementation recipe for both evaporator concentrate and resin waste in the plant. The key input parameters were determined, evaluated and the control of these parameters were included into the design. The applied Six Sigma{sup TM} tools can help to organize the thinking during the engineering process. Data are organized and clearly presented. Various variables can be limited to the most important ones. The Six Sigma{sup TM} tools help to make the thinking and decision process trace able. The tools can help to make data driven decisions (e.g. C and E Matrix). But the tools are not the only golden way. Results from scoring tools like the C and E Matrix need close review before using them. The DoE is an effective tool for generating test plans. DoE can be used with a small number of tests runs, but gives a valuable result from an engineering perspective in terms of a transfer function. The DoE prediction results, however, are only valid in the tested area. So a careful selection of input parameter and their limits for setting up a DoE is very important. An extrapolation of results is not recommended because the results are not reliable out of the tested area. (authors)

  2. Prevalence of Pediculus humanus capitis among school girls of Chuang-Wei and Nan-Ao Districts in I-Lan County and Man-Chow District in Ping-Tung County, Taiwan.

    PubMed

    Chao, D; Liu, H Y; Fan, P C

    1981-03-01

    By using the naked eye examination and comb method, a field survey and combing collection of head louse (Pediculus humanus capitis) among school girls in three different area (Man-Chow, Nan-Ao and Chuang-Wei) of Taiwan were performed from July 1979 to February, 1980. The general infestation rate of head louse was 39.8% (or 998/2,509). In the primary schools, comparatively, the rate at Man-Chow (66.7%) was highest, the next at Nan-Ao (55.4%) and the lowest at Chuang-Wei (39.4%). While in the junior high schools, the rate was apparently higher at Nan-Ao (38.4%) than that at Man-Chow (15.6%) and Chang-Wei (12.0%). The highest rate in the primary schools was found in 3rd graders except at Chuang-Wei in 5th graders. The corresponding figure in the junior high schools was found in 1st graders except at Nan-Ao in 2nd graders. Of 774 infested girls studied, according to the number of lice per infested girl, the percentages of infestation in the 5 groups were: the very light (nits only) 54.5, light (1-10) 38.5, moderate (11-50) 6.5, heavy (51-100) 0.4 and very heavy (over 100) 0.1 respectively. Of 2,178 head lice examined, 53.0% was nymphs; 28.7% females; 18.2% males. The average number of head louse in each infested girl 6.2. PMID:7261698

  3. Magellan Adaptive Optics First-light Observations of the Exoplanet ? Pic b. II. 3-5 ?m Direct Imaging with MagAO+Clio, and the Empirical Bolometric Luminosity of a Self-luminous Giant Planet

    NASA Astrophysics Data System (ADS)

    Morzinski, Katie M.; Males, Jared R.; Skemer, Andy J.; Close, Laird M.; Hinz, Phil M.; Rodigas, T. J.; Puglisi, Alfio; Esposito, Simone; Riccardi, Armando; Pinna, Enrico; Xompero, Marco; Briguglio, Runa; Bailey, Vanessa P.; Follette, Katherine B.; Kopon, Derek; Weinberger, Alycia J.; Wu, Ya-Lin

    2015-12-01

    Young giant exoplanets are a unique laboratory for understanding cool, low-gravity atmospheres. A quintessential example is the massive extrasolar planet ? Pic b, which is 9 AU from and embedded in the debris disk of the young nearby A6V star ? Pictoris. We observed the system with first light of the Magellan Adaptive Optics (MagAO) system. In Paper I we presented the first CCD detection of this planet with MagAO+VisAO. Here we present four MagAO+Clio images of ? Pic b at 3.1 ?m, 3.3 ?m, L?, and {M}\\prime , including the first observation in the fundamental CH4 band. To remove systematic errors from the spectral energy distribution (SED), we re-calibrate the literature photometry and combine it with our own data, for a total of 22 independent measurements at 16 passbands from 0.99 to 4.8 ?m. Atmosphere models demonstrate the planet is cloudy but are degenerate in effective temperature and radius. The measured SED now covers >80% of the planet's energy, so we approach the bolometric luminosity empirically. We calculate the luminosity by extending the measured SED with a blackbody and integrating to find log({{L}}{bol}/{{L}}? ) \\=\\-3.78+/- 0.03. From our bolometric luminosity and an age of 23 ± 3 Myr, hot-start evolutionary tracks give a mass of 12.7 ± 0.3 {{M}}{Jup}, radius of 1.45 ± 0.02 {{R}}{Jup}, and Teff of 1708 ± 23 K (model-dependent errors not included). Our empirically determined luminosity is in agreement with values from atmospheric models (typically -3.8 dex), but brighter than values from the field-dwarf bolometric correction (typically -3.9 dex), illustrating the limitations in comparing young exoplanets to old brown dwarfs.

  4. Activation of the Jasmonic Acid Pathway by Depletion of the Hydroperoxide Lyase OsHPL3 Reveals Crosstalk between the HPL and AOS Branches of the Oxylipin Pathway in Rice

    PubMed Central

    Tang, Jiuyou; Wang, Weihong; Zhang, Fengxia; Wang, Guodong; Chu, Jinfang; Yan, Cunyu; Wang, Taoqing; Chu, Chengcai; Li, Chuanyou

    2012-01-01

    The allene oxide synthase (AOS) and hydroperoxide lyase (HPL) branches of the oxylipin pathway, which underlie the production of jasmonates and aldehydes, respectively, function in plant responses to a range of stresses. Regulatory crosstalk has been proposed to exist between these two signaling branches; however, there is no direct evidence of this. Here, we identified and characterized a jasmonic acid (JA) overproduction mutant, cea62, by screening a rice T-DNA insertion mutant library for lineages that constitutively express the AOS gene. Map-based cloning was used to identify the underlying gene as hydroperoxide lyase OsHPL3. HPL3 expression and the enzyme activity of its product, (E)-2-hexenal, were depleted in the cea62 mutant, which resulted in the dramatic overproduction of JA, the activation of JA signaling, and the emergence of the lesion mimic phenotype. A time-course analysis of lesion formation and of the induction of defense responsive genes in the cea62 mutant revealed that the activation of JA biosynthesis and signaling in cea62 was regulated in a developmental manner, as was OsHPL3 activity in the wild-type plant. Microarray analysis showed that the JA-governed defense response was greatly activated in cea62 and this plant exhibited enhanced resistance to the T1 strain of the bacterial blight pathogen Xanthomonasoryzaepvoryzae (Xoo). The wounding response was attenuated in cea62 plants during the early stages of development, but partially recovered when JA levels were elevated during the later stages. In contrast, the wounding response was not altered during the different developmental stages of wild-type plants. These findings suggest that these two branches of the oxylipin pathway exhibit crosstalk with regards to biosynthesis and signaling and cooperate with each other to function in diverse stress responses. PMID:23209649

  5. Neuer Universittsrat an der Johannes Kepler Universitt Heinrich Schaller einstimmig zum Vorsitzenden gewhlt

    E-print Network

    Hochreiter, Sepp

    . Gabriele Sachs Dr. Julius Stieber Mag. Dr. Andrea Wesenauer Die Funktionsperiode der Mitglieder beträgt Oberösterreich. ao. Univ.-Prof. DDr. Gabriele Sachs, geb. 1954 in Julbach, ist Ärztliche Direktorin der Universitätsrat aus folgenden Personen zusammen: Dr. Heinrich Schaller Mag. Eva Belabed, MBA Prof. Dr. Dr. Josef

  6. Agradecimentos Ao Yoshi, pela orienta c~ao e paci^encia. Seu entusiasmo e paix~ao pela

    E-print Network

    Kohayakawa, Yoshiharu

    - lizamos o Jogo de Ehrenfeucht. Apresentamos dois importantes resultados na #19; area: o de Glebskii.4. Satisfatibilidade 15 1.5. Isomor#12;smos parciais e m-equival^encia 16 1.6. O Jogo de Ehrenfeucht 18 1.7. Fun#24;c Jogo de Ehrenfeucht 22 2.2. Resultados sobre f#19;ormulas de m-Hintikka 23 2.3. A prova 24 Cap#19

  7. Cap'itulo 1 Introduc~ao

    E-print Network

    de Figueiredo, Luiz Henrique

    de uma cena sint'etica e, possivelmente, do movimento da câ??amera virtual. 1.1 Um Pouco de Hist'oria O. 1957 John Whitney cria os primeiros gr'aficos anal'ogicos gerados por computador. 1961 John Whitney

  8. AO13 Aerosol sampling April 29, 2008

    E-print Network

    Oxford, University of

    direct sampling of aerosol particles at altitude, and published studies have involved aircraft mounted samplers. A cheap autonomous sonde mounted sampler was designed and constructed together with functional], and Pusechel at al [3], employed NASA ER-2 and DC-8 research aircraft mounted sampling devices. These aircraft

  9. Inflection in the Ao dialect of Yoruba

    E-print Network

    Taiwo, Oye

    2011-10-03

    new ‘I will not buy a new car’. c. Táyé fun mi ní a??. Táyé give me PREP cloth ‘Táyé gave me a piece of cloth’. (7) a. w??n ti rí w?n. they PERF see them ‘They have seen them... different forms in the table above. The plural pronouns and the third person singular pronoun have three forms each. The forms of the pronoun before high tone verbs are shown in the sentences in (16). (16) a. mò té ulí Táyé. I arrive...

  10. Ao certo ningum sabe quantos so. Estatsticas

    E-print Network

    Instituto de Sistemas e Robotica

    universidade quem os abandonou por não ter dinheiro para estudar. TEXTO DE BARBARA RALA #12;e tem menos de 30 aproveitamento es- colar terá de devolver o dinheiro. Inserida no programa Garantia Jovem da União Europeia

  11. ExAO for GMT Olivier Guyon

    E-print Network

    Guyon, Olivier

    nearby star Spectral characterization of exoplanets #12;Mass Radius Planet overall structure (Iron, Rock Astrometry System dynamical stability inclination ? Spectra / colors Radial Velocity time photometry) ? Eff. temp (IR) ? impact frequency surface temperature, pressure & compositio

  12. Cosmologia e Representa\\c{c}\\~ao

    E-print Network

    Ribeiro, Marcelo Byrro

    2013-01-01

    This work presents a brief and non-technical description of the main results and concepts of the modern scientific cosmology, viewing it from an epistemological perspective which allows a dialog with other modes of thinking like e.g. history, philosophy, sociology and religion. This epistemological viewpoint is based on the philosophical theses advanced by Ludwig Boltzmann (1844-1906) which states that scientific theories are nothing more than representations, or images, of nature (arXiv:physics/0701308v1). By being representations one cannot know how nature really is because the intrinsic and indispensable properties that characterize nature are unreachable by science. In other words, the true essences that constitute nature are unknowable. Therefore, all answers proposed by science are partial, simplified and replaceable. Another way of putting forward this viewpoint is to state that all scientific truths are provisional, a result which naturally leads to the conclusion that the same set of phenomena, or sc...

  13. Ao XII, N3 / 2003 Septiembre -Diciembre

    E-print Network

    Harms, Kyle E.

    . Regeneración de árboles tropicales e implicaciones para el manejo de bosques naturales. Ecosistemas 2003/3 (URL: http://www.aeet.org/ecosistemas/033/revision2.htm) Regeneración de árboles tropicales e implicaciones sus ecosistemas (Cannon et al. 1998; Costa y Magnusson 2003). Cuanto mejor entendamos la regeneración

  14. Ao XIII, N1 / 2004 Enero -Abril

    E-print Network

    Murcia, Universidad de

    Millán, A. 2004. Vulnerabilidad de los coleópteros acuáticos de la Región de Murcia. Ecosistemas 2004/1 (URL: http//www.aeet.org/ecosistemas/041/investigacion1.htm ) Vulnerabilidad de los coleópteros áridas de Europa, atesora gran diversidad de ecosistemas acuáticos, algunos de ellos únicos en cuanto

  15. Comparative Lyot Coronagraphy with Extreme AO Systems

    E-print Network

    Crepp, J; Ge, J; Crepp, Justin; Heuvel, Andrew Vanden

    2007-01-01

    As adaptive optics technology continues to improve, the stellar coronagraph will play an ever increasing role in ground-based high-contrast imaging observations. Though several different image masks exist for the most common type of coronagraph, the Lyot coronagraph, it is not yet clear what level of wavefront correction must be reached in order to gain, either in starlight suppression or observing efficiency, by implementing a more sophisticated design. In this paper, we model image plane Lyot-style coronagraphs and test their response to a range of wavefront correction levels, in order to identify regimes of atmospheric compensation where the use of hard-edge, Gaussian, and band-limited image masks becomes observationally advantageous. To delineate performances, we calculate the speckle noise floor mean intensity. We find that apodized masks provide little improvement over hard-edge masks until on-sky Strehl ratios exceed $\\sim0.88 \\: S_{qs}$, where $S_{qs}$ is the intrinsic Strehl ratio provided by the opt...

  16. Comparative Lyot Coronagraphy with Extreme AO Systems

    E-print Network

    Justin Crepp; Andrew Vanden Heuvel; Jian Ge

    2007-02-27

    As adaptive optics technology continues to improve, the stellar coronagraph will play an ever increasing role in ground-based high-contrast imaging observations. Though several different image masks exist for the most common type of coronagraph, the Lyot coronagraph, it is not yet clear what level of wavefront correction must be reached in order to gain, either in starlight suppression or observing efficiency, by implementing a more sophisticated design. In this paper, we model image plane Lyot-style coronagraphs and test their response to a range of wavefront correction levels, in order to identify regimes of atmospheric compensation where the use of hard-edge, Gaussian, and band-limited image masks becomes observationally advantageous. To delineate performances, we calculate the speckle noise floor mean intensity. We find that apodized masks provide little improvement over hard-edge masks until on-sky Strehl ratios exceed $\\sim0.88 \\: S_{qs}$, where $S_{qs}$ is the intrinsic Strehl ratio provided by the optical system. Above this value, 4th-order band-limited masks out-perform Gaussian masks by generating comparable contrast with higher Lyot stop throughput. Below this level of correction, hard-edge masks may be preferentially chosen, since they are less susceptible to low-order aberration content. The use of higher-order band-limited masks is relegated to situations where quasi-static residual starlight cannot be sufficiently removed from the search area with speckle-nulling hardware.

  17. Projetos de Extenso de Ao Contnua

    E-print Network

    Maier, Rudolf Richard

    suas atividades nas lin- has de Comunicação, Cultura, Direitos Humanos e Justiça, Educação, Meio Am corpo extensionista docente, discente e técnico que manteve a excelência da Extensão na UnB no ano de Administração Atlas Histórico Digital da América Lusa Atuação de Enfermagem no Programa de Controle de Infecção

  18. Gene Cluster on pAO1 of Arthrobacter nicotinovorans Involved in Degradation of the Plant Alkaloid Nicotine: Cloning, Purification, and Characterization of 2,6-Dihydroxypyridine 3-Hydroxylase

    PubMed Central

    Baitsch, Daniel; Sandu, Cristinel; Brandsch, Roderich; Igloi, Gabor L.

    2001-01-01

    A 27,690-bp gene cluster involved in the degradation of the plant alkaloid nicotine was characterized from the plasmid pAO1 of Arthrobacter nicotinovorans. The genes of the heterotrimeric, molybdopterin cofactor (MoCo)-, flavin adenine dinucleotide (FAD)-, and [Fe-S] cluster-dependent 6-hydroxypseudooxynicotine (ketone) dehydrogenase (KDH) were identified within this cluster. The gene of the large MoCo subunit of KDH was located 4,266 bp from the FAD and [Fe-S] cluster subunit genes. Deduced functions of proteins encoded by open reading frames (ORFs) of the cluster were correlated to individual steps in nicotine degradation. The gene for 2,6-dihydroxypyridine 3-hydroxylase was cloned and expressed in Escherichia coli. The purified homodimeric enzyme of 90 kDa contained 2 mol of tightly bound FAD per mol of dimer. Enzyme activity was strictly NADH-dependent and specific for 2,6-dihydroxypyridine. 2,3-Dihydroxypyridine and 2,6-dimethoxypyridine acted as irreversible inhibitors. Additional ORFs were shown to encode hypothetical proteins presumably required for holoenzyme assembly, interaction with the cell membrane, and transcriptional regulation, including a MobA homologue predicted to be specific for the synthesis of the molybdopterin cytidine dinucleotide cofactor. PMID:11514508

  19. Ecole des Docteurs de l'Universit Fdrale Toulouse Midi-Pyrnes | ecoledesdocteurs@univ-toulouse.fr / www.univ-toulouse.fr

    E-print Network

    Bordenave, Charles

    : MECANIQUE, ENERGETIQUE, GENIE CIVIL, PROCEDES (MEGEP) LABORATOIRE : LABORATOIRE DE GENIE CHIMIQUE ­ LGC AGROINDUSTRIELS SUR LES STRUCTURES /OUVRAGES EN BETON DANS LA FILIERE DE VALORISATION PAR METHANISATION (OU : DURABILITE DU BETON DE STRUCTURE DANS LES METHANISEURS RESUME DE LA PRESENTATION : « LES BACTERIES DES

  20. SLAM for Large Environments using Scan Data with Received Light Intensity of a SOKUIKI Sensor *HARA Yoshitaka (Univ. of Tsukuba), KAWATA Hirohiko (Univ. of Tsukuba),

    E-print Network

    Ohya, Akihisa

    SLAM SLAM for Large Environments using Scan Data with Received Light Intensity of a SOKUIKI Sensor with Received Light Intensity of a SOKUIKI sensor. This algorithm was implemented with particle filters. Because of using Received Light Intensity data, the method is robust for both geometric featured and featureless