Sample records for tolerante ao glifosato

  1. Direct and indirect effects of the glyphosate formulation Glifosato Atanor® on freshwater microbial communities.

    PubMed

    Vera, María Solange; Di Fiori, Eugenia; Lagomarsino, Leonardo; Sinistro, Rodrigo; Escaray, Roberto; Iummato, María Mercedes; Juárez, Angela; Ríos de Molina, María del Carmen; Tell, Guillermo; Pizarro, Haydée

    2012-10-01

    Glyphosate-based formulations are among the most widely used herbicides in the world. The effect of the formulation Glifosato Atanor(®) on freshwater microbial communities (phytoplankton, bacterioplankton, periphyton and zooplankton) was assessed through a manipulative experiment using six small outdoor microcosms of small volume. Three of the microcosms were added with 3.5 mg l(-1) of glyphosate whereas the other three were left as controls without the herbicide. The treated microcosms showed a significant increase in total phosphorus, not fully explained by the glyphosate present in the Glifosato Atanor(®). Therefore, part of the phosphorus should have come from the surfactants of the formulation. The results showed significant direct and indirect effects of Glifosato Atanor(®) on the microbial communities. A single application of the herbicide caused a fast increase both in the abundance of bacterioplankton and planktonic picocyanobacteria and in chlorophyll a concentration in the water column. Although metabolic alterations related to oxidative stress were induced in the periphyton community, the herbicide favored its development, with a large contribution of filamentous algae typical of nutrient-rich systems, with shallow and calm waters. An indirect effect of the herbicide on the zooplankton was observed due to the increase in the abundance of the rotifer Lecane spp. as a consequence of the improved food availability given by picocyanobacteria and bacteria. The formulation affected directly a fraction of copepods as a target. It was concluded that the Glifosato Atanor(®) accelerates the deterioration of the water quality, especially when considering small-volume water systems. PMID:22539117

  2. Geratrizes. Dedu c ao

    E-print Network

    Barata, João Carlos Alves

    definiâ?º câ? ao pressupâ? oe que a sâ?? erie de potâ?? encias em t do lado direito seja convergente em alguma an n! t n . Essa definiâ?º câ? ao pressupâ? oe que a sâ?? erie de potâ?? encias em t do lado direito seja convergente em alguma regiâ? ao aberta do plano complexo, digamos |t| direito, caso

  3. Exponenciais, Exponencia c ao

    E-print Network

    Barata, João Carlos Alves

    A(#) ds . (10.7) A sâ?? erie dentro da exponencial no lado direito de (10.4) â?? e um tanto complexa, masâ?? encia da sâ?? erie do lado direito sâ?? o pode ser estabelecida para matrizes suficientemente ``pequenasâ?? erie do lado direito serâ?? a finita e, portanto, convergente. Comentamos ao leitor mais avanâ?º cado que

  4. aoLimitados Hilbert Conte

    E-print Network

    Barata, João Carlos Alves

    +##, # # # H 1 Jâ?? anos von Neumann (1903--1957). Von Neumann tambâ?? em adotou os nomes de Johann von Neumann e John von Neumann. 2052 JCABarata. Curso de Fâ?? �sica­Matemâ?? atica Versâ? ao de 30 de maio de 2014. Cap operadores nâ? ao­limitados em espaâ?º cos de Hilbert foi desenvolvida originalmente por von Neumann 1 no final

  5. 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.

  6. Aperture masking behind AO systems

    NASA Astrophysics Data System (ADS)

    Ireland, Michael J.

    2012-07-01

    Sparse Aperture-Mask Interferometry (SAM or NRM) behind Adaptive Optics (AO) has now come of age, with more than a dozen astronomy papers published from several 5-10m class telescopes around the world. I will describe the reasons behind its success in achieving relatively high contrasts ( 1000:1 at lambda/ D) and repeatable binary astronomy at the diffraction limit, even when used behind laser-guide star adaptive optics. Placed within the context of AO calibration, the information in an image can be split into pupil-plane phase, Fourier amplitude and closure-phase. It is the closure-phase observable, or its generalisation to Kernel phase, that is immune to pupil-plane phase errors at first and second-order and has been the reason for the technique's success. I will outline the limitations of the technique and the prospects for aperture-masking and related techniques in the future.

  7. Motivac~ao Consist^encia: modelos baseados em dados

    E-print Network

    Rodriguez, Noemi

    Motiva¸c~ao Consist^encia: modelos baseados em dados Consist^encia: modelos baseados do cliente Implementa¸c~ao Localiza¸c~ao de r´eplicas Replica¸c~ao Sistemas Distribu´idos junho de 2013 Replica¸c~ao #12;Motiva¸c~ao Consist^encia: modelos baseados em dados Consist^encia: modelos baseados do cliente

  8. The first VisAO-fed integral field spectrograph: VisAO IFS

    Microsoft Academic Search

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

    2010-01-01

    We present the optomechanical design of the Magellan VisAO Integral Field Spectrograph (VisAO IFS), designed to take advantage of Magellan's AO system and its 85.1cm concave ellipsoidal Adaptive Secondary Mirror (ASM). With 585 actuators and an equal number of actively-controlled modes, this revolutionary second generation ASM will be the first to achieve moderate Strehl ratios into the visible wavelength regime.

  9. IMPLEMENTAC ~AO PARALELA DA LOCALIZAC ~AO DE MONTE CARLO PARA ROB^OS MOVEIS EM GPUS COMERCIAIS

    E-print Network

    Chaimowicz, Luiz

    IMPLEMENTAC¸ ~AO PARALELA DA LOCALIZAC¸ ~AO DE MONTE CARLO PARA ROB^OS M´OVEIS EM GPUS COMERCIAIS localiza¸c~ao de Monte Carlo (MCL) em GPUs (Graphics Processing Units). A capacidade de se localizar em¸c~ao principal foi o de prover estimativas de pose que fossem mais r´apidas e mais precisas em tempo real aos rob

  10. Into the blue: AO science with MagAO in the visible

    NASA Astrophysics Data System (ADS)

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

    2014-08-01

    We review astronomical results in the visible (?<1?m) with adaptive optics. Other than a brief period in the early 1990s, there has been little astronomical science done in the visible with AO until recently. The most productive visible AO system to date is our 6.5m Magellan telescope AO system (MagAO). MagAO is an advanced Adaptive Secondary system at the Magellan 6.5m in Chile. This secondary has 585 actuators with < 1 msec response times (0.7 ms typically). We use a pyramid wavefront sensor. The relatively small actuator pitch (~23 cm/subap) allows moderate Strehls to be obtained in the visible (0.63-1.05 microns). We use a CCD AO science camera called "VisAO". On-sky long exposures (60s) achieve <30mas resolutions, 30% Strehls at 0.62 microns (r') with the VisAO camera in 0.5" seeing with bright R < 8 mag stars. These relatively high visible wavelength Strehls are made possible by our powerful combination of a next generation ASM and a Pyramid WFS with 378 controlled modes and 1000 Hz loop frequency. We'll review the key steps to having good performance in the visible and review the exciting new AO visible science opportunities and refereed publications in both broad-band (r,i,z,Y) and at Halpha for exoplanets, protoplanetary disks, young stars, and emission line jets. These examples highlight the power of visible AO to probe circumstellar regions/spatial resolutions that would otherwise require much larger diameter telescopes with classical infrared AO cameras.

  11. Operadores positivos em dimens\\~ao finita: uma caracteriza\\c{c}\\~ao

    E-print Network

    Fassarella, L

    2011-01-01

    A characterization of positive operators in finite dimensional complex vector spaces based on the Routh-Hurwitz Criterion. ----- Uma caracteriza\\c{c}\\~ao dos operadores positivos em espa\\c{c}os vetoriais complexos de dimens\\~ao finita a partir do Crit\\'erio de Routh-Hurwitz.

  12. AOS Seminar 2006 Multistatic Acoustic Classification

    E-print Network

    Jaffe, Jules

    AOS Seminar 2006 Multistatic Acoustic Classification of Zooplankton 02/16/2006 Paul L. D. Roberts #12;Agenda Motivation and background. Zooplankton of the Southern California Bight. Multistatic;Zooplankton Ecology We wish to study zooplankton to understand their impact on the oceanic and global

  13. MEMS DM development at Iris AO, Inc.

    NASA Astrophysics Data System (ADS)

    Helmbrecht, Michael A.; He, Min; Kempf, Carl J.; Besse, Marc

    2011-03-01

    Iris AO is actively developing piston-tip-tilt (PTT) segmented MEMS deformable mirrors (DM) and adaptive optics (AO) controllers for these DMs. This paper discusses ongoing research at Iris AO that has advanced the state-of-the-art of these devices and systems over the past year. Improvements made to open-loop operation and mirror fabrication enables mirrors to open-loop flatten to 4 nm rms. Additional testing of an anti snap-in technology was conducted and demonstrates that the technology can withstand 100 million snap-in events without failure. Deformable mirrors with dielectric coatings are shown that are capable of handling 630 W/cm2 of incident laser power. Over a localized region on the segment, the dielectric coatings can withstand 100kW/cm2 incident laser power for 30 minutes. Results from the first-ever batch of PTT489 DMs that were shipped to pilot customers are reported. Optimizations made to the open-loop PTT controller are shown to have latencies of 157.5 ?s and synchronous array update rates of nearly 6.5 kHz. Finally, plans for the design and fabrication of the next-generation PTT939 DM are presented.

  14. Recent enhancements to the NAOMI AO system

    NASA Astrophysics Data System (ADS)

    Jolley, Paul D.; Goodsell, Stephen; Benn, Chris R.; Gregory, Thomas; Rees, Simon; van der Hoeven, Michiel; Blanken, Maarten; Pit, Renee

    2004-10-01

    The Nasmyth Adaptive Optics Multipurpose Instrument (NAOMI) is the adaptive optics (AO) platform on the 4.2m William Herschel Telescope (WHT) at the Isaac Newton Group of Telescopes (ING). Until recently NAOMI has been concentrating on near infrared observations using the Isaac Newton Group Red Imaging Device (INGRID). Recent developments have added an extra optical port to NAOMI. The observer can now rapidly switch between infrared and optical instrumentation during AO observing, making the system more appealing for visiting instruments. To allow for the operation of the common user optical spectrograph OASIS, a new optical path was created around the existing NAOMI optics. Various mechanisms were also added to the whole optical system. The OASIS beam was reshaped to f/20. The original optical/IR beam remains unchanged at f/16, and forms a new universal science port (USP). The existing Nasmyth Calibration Unit (NCU) has been replaced with a new design. This new NCU has multiple fibre-fed light sources that include continuum and arc lamps. The intensity of light can be individually adjusted via computer control. A new acquisition camera is mounted such that it can be used simultaneously with the spectral lamps. Software upgrades now allow faster deformable mirror calibration. A moveable mirror is used to select which science port will receive the light. Enhancements to the NAOMI AO system are discussed in this paper and suggestions for possible future upgrades.

  15. Deformable mirror designs for extreme AO (XAO)

    NASA Astrophysics Data System (ADS)

    Cavaco, Jeffrey; Wirth, Allan

    2014-08-01

    One of the science missions for the next generation of extremely large ground based telescopes (30-42m apertures) is the imaging and spectroscopy of exoplanets. To achieve that goal an Adaptive Optics (AO) subsystem with a very large number of corrected modes is required. To provide contrast ratios in the range of 10-9 or better for a 42m telescope an AO system with 25,000 to 60,000 channels will be needed. This is approximately an order of magnitude beyond the current state of the art. Adaptive Optics Associates Xinetics has developed the Photonex Module Deformable Mirror (DM) technology specifically to address the needs of extreme AO for high contrast applications. A Photonex Module is a monolithic block of electrostrictive ceramic in which a high density of individually addressable actuators are formed by screen printing of electrodes and partial wire saw cutting of the ceramic. The printed electrode structures also allow all electrical connections to be made at the back surface of the module via flex circuits. Actuator spacings of 1mm or less have been achieved using this approach. The individual modules can be edge butted and bonded to achieve high actuator count. The largest DMs fabricated to date have 4096 actuators in a 64X64mm array. In this paper the engineering challenges in extending this technology by a factor of ten or more in actuator count will be discussed. A conceptual design for a DM suitable for XAO will be presented. Approaches for a support structure that will maintain the low spatial frequency surface figure of this large (~0.6m) DM and for the electrical interface to the tens of thousands of actuators will be discussed. Finally, performance estimates will be presented.

  16. ARTIGO INTERNET IST lana plataforma virtual Visita Virtual ao Campus

    E-print Network

    Instituto de Sistemas e Robotica

    NewsSearch ARTIGO INTERNET IST lança plataforma virtual Visita Virtual ao Campus in http://www.briefing.pt/ Data: 2011-7-7 Link: http://www.briefing.pt/index.p ... IST lança plataforma virtual Visita Virtual ao

  17. Characterization of an AO-OCT system - Oral Paper

    NASA Astrophysics Data System (ADS)

    Evans, J. W.; Zawadzki, Robert J.; Jones, Steve; Olivier, Scot S.; Werner, John S.

    2008-01-01

    Adaptive optics (AO) and optical coherence tomography (OCT) are powerful imaging modalities that, when combined, can provide high-resolution, 3-D, in vivo images of the retina. We will discuss general techniques for characterizing a vision science AO system, and we will describe the results of applying these techniques to measure the residual wavefront errors for the UC Davis AO-OCT system. Careful characterization of the AO system will lead to improved performance and inform the design of future systems.

  18. Tecnologia VLSI -Processo de fabricac~ao MAC 412 -Organizac~ao de Computadores

    E-print Network

    Song, Siang Wun

    superf´icie. 2. Pintar com uma fina camada de material org^anico chamado "resist". Secar e"assar"no forno a estrutura de mol´eculas de parte (expostas) do resist. 4. Usar banho de solvente para tirar"resist"expostos (quebradi¸cos). 5. Usar ´acido hidroflu´orico que dissolve o ´oxido SiO2 mas n~ao ataca o "resist". 6

  19. 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

  20. First closed-loop visible AO test results for the advanced adaptive secondary AO system for the Magellan Telescope: MagAO's performance and status

    NASA Astrophysics Data System (ADS)

    Close, Laird M.; Males, Jared R.; Kopon, Derek A.; Gasho, Victor; Follette, Katherine B.; Hinz, Phil; Morzinski, Katie; Uomoto, Alan; Hare, Tyson; Riccardi, Armando; Esposito, Simone; Puglisi, Alfio; Pinna, Enrico; Busoni, Lorenzo; Arcidiacono, Carmelo; Xompero, Marco; Briguglio, Runa; Quiros-Pacheco, Fernando; Argomedo, Javier

    2012-07-01

    The heart of the 6.5 Magellan AO system (MagAO) is a 585 actuator adaptive secondary mirror (ASM) with <1 msec response times (0.7 ms typically). This adaptive secondary will allow low emissivity and high-contrast AO science. We fabricated a high order (561 mode) pyramid wavefront sensor (similar to that now successfully used at the Large Binocular Telescope). The relatively high actuator count (and small projected ~23 cm pitch) allows moderate Strehls to be obtained by MagAO in the “visible” (0.63-1.05 ?m). To take advantage of this we have fabricated an AO CCD science camera called "VisAO". Complete “end-to-end” closed-loop lab tests of MagAO achieve a solid, broad-band, 37% Strehl (122 nm rms) at 0.76 ?m (i’) with the VisAO camera in 0.8” simulated seeing (13 cm ro at V) with fast 33 mph winds and a 40 m Lo locked on R=8 mag artificial star. These relatively high visible wavelength Strehls are enabled by our powerful combination of a next generation ASM and a Pyramid WFS with 400 controlled modes and 1000 Hz sample speeds (similar to that used successfully on-sky at the LBT). Currently only the VisAO science camera is used for lab testing of MagAO, but this high level of measured performance (122 nm rms) promises even higher Strehls with our IR science cameras. On bright (R=8 mag) stars we should achieve very high Strehls (>70% at H) in the IR with the existing MagAO Clio2 (?=1-5.3 ?m) science camera/coronagraph or even higher (~98% Strehl) the Mid-IR (8-26 microns) with the existing BLINC/MIRAC4 science camera in the future. To eliminate non-common path vibrations, dispersions, and optical errors the VisAO science camera is fed by a common path advanced triplet ADC and is piggy-backed on the Pyramid WFS optical board itself. Also a high-speed shutter can be used to block periods of poor correction. The entire system passed CDR in June 2009, and we finished the closed-loop system level testing phase in December 2011. Final system acceptance (“pre-ship” review) was passed in February 2012. In May 2012 the entire AO system is was successfully shipped to Chile and fully tested/aligned. It is now in storage in the Magellan telescope clean room in anticipation of “First Light” scheduled for December 2012. An overview of the design, attributes, performance, and schedule for the Magellan AO system and its two science cameras are briefly presented here.

  1. DWeb3D: Um toolkit para facilitar a criac~ao e manipulac~ao de cenas 3D em X3D Felipe Quintella

    E-print Network

    Barbosa, Alberto

    DWeb3D: Um toolkit para facilitar a criac¸~ao e manipulac¸~ao de cenas 3D em X3D Felipe Quintella@tecgraf.puc-rio.br Resumo O padr~ao X3D ´e uma soluc¸~ao aberta, suas qualidades e problemas s~ao discutidos e e a complexidade do X3D ao lidar com essas quest~oes. Como tentativa de demonstrar que al- gumas das

  2. Active Object Recognition by Offline Solving of POMDPs Susana Brand~ao, Manuela Veloso and Jo~ao Paulo Costeira

    E-print Network

    Veloso, Manuela M.

    Active Object Recognition by Offline Solving of POMDPs Susana Brand~ao, Manuela Veloso and Jo be controlled in the sense of an active perception planning problem. One common approach consists of formulating be feasible in such an environment. S. Brand~ao is with the Department of Electrical and Computer Engineering

  3. 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.

  4. 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.

  5. Tibial shaft fractures treated with the AO unreamed tibial nail

    Microsoft Academic Search

    S Kutty; M Farooq; D Murphy; C Kelliher; F Condon; JP McElwain

    2003-01-01

    Background The AO unreamed tibial nail (UTN) has been used for both open and closed tibial fractures. The reported results have been\\u000a mixed. We evaluated its outcome in our unit.\\u000a \\u000a \\u000a Aim To assess the outcome of tibial shaft fractures treated with the AO UTN.\\u000a \\u000a \\u000a \\u000a \\u000a Methods Forty-eight patients underwent intramedullary nailing between 1995 and 2000 using the AO UTN. Follow-up details

  6. Visible AO Observations at Halpha for Accreting Young Planets

    NASA Astrophysics Data System (ADS)

    Close, L. M.; Follette, K.; Males, J. R.; Morzinski, K.; Rodigas, T. J.; Hinz, P.; Wu, Y.-L.; Apai, D.; Najita, J.; Puglisi, A.; Esposito, S.; Riccardi, A.; Bailey, V.; Xompero, M.; Briguglio, R.; Weinberger, A.

    2014-01-01

    We utilized the new high-order (250-378 mode) Magellan Adaptive Optics system (MagAO) to obtain very high-resolution science in the visible 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 (60s) r' (0.63?m) images are slightly coarser at FWHM = 23-29 mas (Strehl ~ 28%) with bright (R < 9 mag) guide stars. These are the highest resolution filled-aperture images published to date. Images of the young (~ 1 Myr) Orion Trapezium ?1 Ori A, B, and C cluster members were obtained with VisAO. In particular, the 32 mas binary ?1 Ori C 1 C 2 was easily resolved in non-interferometric images for the first time. Relative positions of the bright trapezium binary stars were measured with ~ 0.6-5 mas accuracy. In the second commissioning run we were able to correct 378 modes and achieved good contrasts (Strehl>20% on young transition disks at H?). We discuss the contrasts achieved at H? and the possibility of detecting low mass (~ 1-5 Mjup) planets (past 5AU) with our new SAPPHIRES survey with MagAO at H?.

  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. Galactic astronomy with AO: nearby star clusters and moving groups

    NASA Astrophysics Data System (ADS)

    Davidge, T. J.

    2014-08-01

    Observations of Galactic star clusters and objects in nearby moving groups recorded with Adaptive Optics (AO) systems on Gemini South are discussed. These include observations of open and globular clusters with the GeMS system, and high Strehl L' observations of the moving group member Sirius obtained with NICI. The latter data fail to reveal a brown dwarf companion with a mass >= 0.02M? in an 18 × 18 arcsec2 area around Sirius A. Potential future directions for AO studies of nearby star clusters and groups with systems on large telescopes are also presented.

  9. Four year experience with the AO Anterior Thoracolumbar Locking Plate

    Microsoft Academic Search

    J S Thalgott; M B Kabins; M Timlin; K Fritts; J M Giuffre

    1997-01-01

    For decades spinal surgeons have attempted to design simple, single stage anterior internal fixation systems for the thoracic and lumbar spine. Early devices presented both biomechanical and technical problems. The AO Anterior Thoracolumbar Locking Plate (ATLP) was designed to solve some of the problems encountered with early anterior instrumentation. The ATLP system is constructed in Commercially Pure titanium. It is

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

    E-print Network

    Oxford, University of

    aircraft efficiency) and so a study of the impact of aircraft engine emissions is highly relevant and alsoAO14: 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

  11. Polynomial Stochastic Hybrid Systems Jo~ao Pedro Hespanha

    E-print Network

    Hespanha, João Pedro

    Polynomial Stochastic Hybrid Systems Jo~ao Pedro Hespanha Center for Control Engineering stochastic hybrid systems (pSHSs), which generally correspond to stochastic hybrid systems with polynomial the accuracy of the results obtained through comparisons with Monte Carlo simulations. These examples include

  12. Anonymous signature scheme Chunbo Ma and Jun Ao

    E-print Network

    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

  13. 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

  14. Construc~ao Observavel de um Quorum de Nos N~ao-Sybil na Vizinhanca Radio de uma Rede Ad Hoc Sem Fios

    E-print Network

    Rodrigues, Luís E.T.

    Construc¸~ao Observ´avel de um Quorum de N´os N~ao-Sybil na Vizinhanc¸a R´adio de uma Rede Ad Hoc Quorum N~ao-Sybil (QNS), numa vizinhanc¸a r´adio de uma rede ad hoc sem fios (i.e. uma rede com um ´unico

  15. Sistemas Distribuidos e Redes de Sensores Comunicac~ao em Grupo

    E-print Network

    Rodriguez, Noemi

    Sistemas Distribu´idos e Redes de Sensores Comunica¸c~ao em Grupo abril de 2013 Comunica¸c~ao em grupo #12;Grupos em Aplica¸c~oes Distribu´idas exemplos: replica¸c~ao de servi¸cos clientes com estado compartilhado computa¸c~ao cient´ifica ... Primitiva de comunica¸c~ao em grupo um processo envia uma mensagem

  16. Sobre a viagem de Enrico Fermi ao Brasil em 1934

    E-print Network

    Caruso, Francisco

    2014-01-01

    Enrico Fermi was one of the greater physicists of the XX century. In 1934, he gave several lectures in Brazil. Invited by Theodoro Ramos to work in S\\~ao Paulo, he preferred to stay in Rome and went to the USA in 1938. However, Fermi recommended Gleb Wataghin to come in his place. Wataghin made history in Brazil, becoming one of the first Professors of the future S\\~ao Paulo University. Besides his relevance to the History of Science, Fermi eventually leaved an indelible mark on the creation and institutionalization of national scientific research due to the indication of Wataghin. Despite this fact, very little is known about Fermi's trip to Brazil. This work tries to reconstruct the fullest possible steps of the famous Italian physicist in our lands.

  17. On random walk de Lévy aplicado aos mapas de variâncias

    NASA Astrophysics Data System (ADS)

    Klafke, J. C.

    2003-08-01

    Uma pergunta que surge ao nos confrontarmos com os mapas de variâncias, ou s-Maps [Klafke, J. C. "Estudo da Difusão Caótica em Ressonâncias Asteroidais", Tese de Doutorado, IAG/USP, 2002] diz respeito ao conteúdo físico de tais representações do espaço de fase. Ou seja, o que representa as variâncias das ações obtidas para uma determinada condição inicial e como relacioná-las com o tempo de difusão das órbitas, supondo-se que estas de fato estejam envolvidas em um processo difusivo? Para discutirmos essa questão, lançamos mão da modelagem dos processos estocásticos subjacentes às variâncias determinadas e implementamos uma série de simulações do tipo Monte Carlo a partir das informações registradas nos s-Maps calculados para algumas ressonâncias asteroidais bem estudadas (p.ex. 3: 1, 2: 1 e 3: 2). Para tanto, temos usado uma função de densidade de probabilidade gaussiana ao definir os n passos que permitirão estabelecer uma relação direta entre o Mapa de Difusão e o Mapa de Variâncias. Contudo, os resultados obtidos até agora tem subestimado o tempo de difusão esperado para os fenômenos conhecidos. Tal se deve ao fato de que, no processo difusivo real, é possível existirem passos de comprimento consideravelmente maiores que a média estabelecida pelas distribuições gaussiana ou normal, sobretudo quando se cruza uma região caótica. Neste trabalho, apresentamos os resultados comparativos de simulações de Monte Carlo com base no random walk de Lévy [Klafter, J. et al. 2002. "Beyond Brownian motion", Phys. Today, Feb, 33-39.], o qual possibilita passos esporádicos de comprimento acima do valor médio (saltos) permitindo estabelecer uma escala de tempo mais próxima da esperada para a difusão.

  18. Dual-Frequency VSOP Observations of AO 0235+164

    E-print Network

    S. Frey; L. I. Gurvits; D. R. Altschuler; M. M. Davis; P. Perillat; C. J. Salter; H. D. Aller; M. F. Aller; H. Hirabayashi

    2000-07-24

    AO 0235+164 is a very compact, flat spectrum radio source identified as a BL Lac object at a redshift of z=0.94. It is one of the most violently variable extragalactic objects at both optical and radio wavelengths. The radio structure of the source revealed by various ground-based VLBI observations is dominated by a nearly unresolved compact component at almost all available frequencies. Dual-frequency space VLBI observations of AO 0235+164 were made with the VSOP mission in January-February 1999. The array of the Japanese HALCA satellite and co-observing ground radio telescopes in Australia, Japan, China and South Africa allowed us to study AO 0235+164 with an unprecedented angular resolution at frequencies of 1.6 and 5 GHz. We report on the sub-milliarcsecond structural properties of the source. The 5-GHz observations led to an estimate of T_B > 5.8 x 10^{13} K for the rest-frame brightness temperature of the core, which is the highest value measured with VSOP to date.

  19. Dual-Frequency VSOP Observations of AO 0235+164

    E-print Network

    Frey, S; Altschüler, D R; Davis, M M; Perillat, P; Salter, C J; Aller, H D; Aller, M F; Hirabayashi, H

    2000-01-01

    AO 0235+164 is a very compact, flat spectrum radio source identified as a BL Lac object at a redshift of z=0.94. It is one of the most violently variable extragalactic objects at both optical and radio wavelengths. The radio structure of the source revealed by various ground-based VLBI observations is dominated by a nearly unresolved compact component at almost all available frequencies. Dual-frequency space VLBI observations of AO 0235+164 were made with the VSOP mission in January-February 1999. The array of the Japanese HALCA satellite and co-observing ground radio telescopes in Australia, Japan, China and South Africa allowed us to study AO 0235+164 with an unprecedented angular resolution at frequencies of 1.6 and 5 GHz. We report on the sub-milliarcsecond structural properties of the source. The 5-GHz observations led to an estimate of T_B > 5.8 x 10^{13} K for the rest-frame brightness temperature of the core, which is the highest value measured with VSOP to date.

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

    SciTech Connect

    Stadermann, F.J.; Amari, S.; Foote, J.; Swan, P.; Walker, R.M.; Zinner, E. [Washington Univ., Saint Louis, MO (United States)

    1995-02-01

    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.

  1. 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.

  2. 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.

  3. As Moças de Isabel Câmara: A Subversão ao Drama Tradicional

    E-print Network

    Vieira de Andrade, Ana Lú cia

    2002-04-01

    Dois Perdidos numa Noite Suja. O impacto da peça ligou-me ao Fauzi primeiro, pois tivemos longas discussões em torno daquela obra prima e seu autor, Plínio Marcos. Foi um soco, uma libertação, uma sensação de alívio, saber que já existia um autor... que a marcou profundamente: Foi então que recebi uma carta, definitiva, de tia Emília, irmã de meu pai. Ela mora em Araruna, sertão da Paraíba.... Via-a apenas uma vez, quando estive por lá.... A carta dela foi o soco, a mesma revelação da peça de...

  4. Esquema hibrido para amostragem de mapas de iluminac~ao em

    E-print Network

    , photorealistic rendering of synthetic 3D scenes using illumination maps captured from real environments¸c~ao com ilumina¸c~ao real. Palavras-chave: Gr´aficos Tridimensionais e Realismo, Amostragem, Rende- riza

  5. ZAP: Um Algoritmo de Atribuic~ao Distribuida de Canais para Mitigac~ao de Interfer^encias em Redes com Radio Cognitivo

    E-print Network

    Wichmann, Felix

    Redes com R´adio Cognitivo Paulo R. Walenga Jr.1,2 , Mauro Fonseca1 , Anelise Munaretto3 , Aline´ida de canais de frequ^encia a enlaces em redes com r´adios cognitivos. Tais r´adios s~ao capazes de~ao-interferente com a utilizac¸~ao de um novo conceito chamado r´adio cognitivo. O r´adio cogni- tivo [Mitola-III e

  6. Fast Object Detection By Regression in Robot Soccer Susana Brand~ao

    E-print Network

    Veloso, Manuela M.

    Fast Object Detection By Regression in Robot Soccer Susana Brand~ao , Manuela Veloso, and Jo and investigate an offline learning approach to model such objects. ODR consists of two main phases: (i) offline¸~ao para a Ci^encia e Tecnologia. Susana Brand~ao holds a fellowship from the Carnegie Mellon

  7. SOLUC ~OES PARA CONTROLO VISUAL DE MOVIMENTO: APLICAC ~AO EM SEGUIMENTO

    E-print Network

    Barreto, Joao

    , movimento direita- esquerda tamb´em designado por "eye pan", e eleva¸c~ao, movimento cima- baixo tamb´emSOLUC¸ ~OES PARA CONTROLO VISUAL DE MOVIMENTO: APLICAC¸ ~AO EM SEGUIMENTO COM VIS~AO ACTIVA Provas . . . . . . . . . . . . . . . . . . . . . . . 7 1.1.1 Seguimento com o Olho Cicl´opico . . . . . . . . . . . . 9 1.1.2 Seguimento em Verg

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

    E-print Network

    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

  9. Correla\\c{c}\\~ao de longa-dura\\c{c}\\~ao e anal\\'ise bayesiana da evolu\\c{c}\\~ao temporal dos terremotos ao longo da falha de samambaia, nordeste do brasil

    E-print Network

    de Freitas, D B; Pereira, L L S; Pedro, L S; Atanazio, M G N; Vilar, C S

    2013-01-01

    A Bayesian approach is adopted to analyze the sequence of seismic events and their magnitudes near Jo\\~ao C\\^amara which occurred mainly from 1983 to 1998 along the Samambaia fault. In this work, we choose a Bayesian model for the process of occurrence times conditional on the observed magnitude values following the same procedure suggested by Stavrakakis and Tselentis (1987). The model parameters are determined on the basis of historical and physical information. We generate posterior samples from the joint posterior distribution of the model parameters by using a variant of the Metropolis-Hastings algorithm. We use the results in a variety of ways, including the construction of pointwise posterior confidence bands for the conditional intensity of the point process as a function of time, as well as, a posterior distribuition as a function of the mean of occurrence per unit time.

  10. 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.

  11. AO Real-time Control Systems for the ELT Era

    NASA Astrophysics Data System (ADS)

    Dipper, N. A.; Basden, A.; Geng, D.; Younger, E. J.

    2011-09-01

    Adaptive Optics systems for instruments on the next generation of astronomical telescopes will be of a significantly higher order than those for existing systems. The requirements for processing power for real-time computers to control such systems will be substantial and may well not be met by the simple application of the next generation of CPU based computers. We present here an overview of the various designs for future real-time computer systems that are being investigated at Durham involving the acceleration (or replacement) of CPU systems by GPU and FPGA based hardware. We address the ongoing argument of which of these technologies should be employed for which applications. We present our plans for the testing of these technologies both in the laboratory and on-sky in the CANARY AO demonstrator at the 4m William Herschel Telescope, along with initial results.

  12. Four year experience with the AO Anterior Thoracolumbar Locking Plate.

    PubMed

    Thalgott, J S; Kabins, M B; Timlin, M; Fritts, K; Giuffre, J M

    1997-05-01

    For decades spinal surgeons have attempted to design simple, single stage anterior internal fixation systems for the thoracic and lumbar spine. Early devices presented both biomechanical and technical problems. The AO Anterior Thoracolumbar Locking Plate (ATLP) was designed to solve some of the problems encountered with early anterior instrumentation. The ATLP system is constructed in Commercially Pure titanium. It is a low profile device indicated for use for unstable burst fractures in the anterior column; metastatic tumor management; and degenerative diseases of the thoracolumbar spine between levels T10 and L5. Implantation of the device involves direct anterior decompression with sagittal reduction and corpectomy. This is followed by grafting reconstruction, and plate fixation. This device has been implanted in 25 patients with an average follow-up of 38 months. There were five (5) broken screws in three (3) patients, and no broken plates. Implant related postoperative complications included two misplaced screws. Preliminary results indicate that the ATLP system seems to be a safe, low profile, MRI/CT compatible device that provides definitive single stage fixation of the anterior spinal column. PMID:9160452

  13. LDEF: Dosimetric measurement results (AO 138-7 experiment)

    NASA Technical Reports Server (NTRS)

    Bourrieau, J.

    1992-01-01

    One of the objectives of the AO 138-7 experiment on board the LDEF was a total dose measurement with Thermo Luminescent Detectors (TLD 100). Two identical cases, both including 5 TLDs inside various aluminum shields, are exposed to the space environment in order to obtain the absorbed dose profile induced. Radiation fluence received during the total mission length was computed, taking into account the trapped particles (solar maximum and solar minimum periods) and the cosmic rays; due to the magnetospheric shielding, the solar proton fluences are negligible on the LDEF orbit. The total dose induced by these radiations inside a semi-infinite plane shield of Al are computed with radiation transport codes. TLD reading are performed after flight; due to the mission duration increase, a post-flight calibration was necessary in order to cover the range of the flight induced dose. The results obtained, similar (+ or - 30 pct.) in both cases, are compared with the dose profile computation. In practice, these LDEF results, with less than a factor 1.4 between measurements and forecasts, reinforce the validity of the computation methods and models used for the long term evaluation of space radiation intensity on low inclination Earth orbits.

  14. EEV CCD39 wavefront sensor cameras for AO and interferometry

    NASA Astrophysics Data System (ADS)

    DuVarney, Raymond C.; Bleau, Charles A.; Motter, Garry T.; Shaklan, Stuart B.; Kuhnert, Andreas C.; Brack, Gary; Palmer, Dean; Troy, Mitchell; Kieu, Thangh; Dekany, Richard G.

    2000-07-01

    SciMeasure, in collaboration with Emory University and the Jet Propulsion Laboratory (JPL), has developed an extremely versatile CCD controller for use in adaptive optics, optical interferometry, and other applications requiring high-speed readout rates and/or low read noise. The overall architecture of this controller system will be discussed and its performance using both EEV CCD39 and MIT/LL CCID-19 detectors will be presented. Initially developed for adaptive optics applications, this controller is used in the Palomar Adaptive Optics program (PALAO), the AO system developed by JPL for the 200' Hale telescope at Palomar Mountain. An overview of the PALAO system is discussed and diffraction-limited science results will be shown. Recently modified under NASA SBIR Phase II funding for use in the Space Interferometry Mission testbeds, this controller is currently in use on the Micro- Arcsecond Metrology testbed at JPL. Details of a new vacuum- compatible remote CCD enclosure and specialized readout sequence programming will also be presented.

  15. 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.

  16. LDEF (Flight), AO038 : Interstellar Gas Experiment, Tray E12

    NASA Technical Reports Server (NTRS)

    1990-01-01

    LDEF (Flight), AO038 : Interstellar Gas Experiment, Tray E12 The flight photograph was taken from the Orbiter aft flight deck during the LDEF retrieval. During the mission, the tray surface was at an angle of approximately ninety-eight (98) degrees to the orbital velocity vector and therefore exposed to a lower atomic oxygen flux than if parallel with the velocity vector. A very light stain is present on the white paint dots on experiment tray clamps along the lower edge of the tray. The color of the white thermal control paint on the IGE has changed and now varies from white to differing shades of 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. The shadows from the tray sidewalls hide most of the dark stain in the upper right corner of the tray. A lighter stain coats the tray's upper side wall, the left side of the canister housing and the experiment baseplate. The insulation on the grid voltage cable that was transparent prior to launch is now a light tan color.

  17. 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.

  18. 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.

  19. 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.

  20. 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

  1. Degree Major Description TotalWhite Afr AmSchool Dept AOS Am Ind Asian Pac Isl Unknown

    E-print Network

    Saidak, Filip

    Degree Major Description TotalWhite Afr AmSchool Dept AOS Am Ind Asian Haw / Pac Isl Unknown Am Ind Asian Haw / Pac Isl Unknown Graduate Enrollment by School, Department, Major, AOS CodeSchool Dept AOS Am Ind Asian Haw / Pac Isl Unknown Graduate Enrollment by School, Department, Major, AOS Code

  2. 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.

  3. 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.

  4. Diferentes metodologias aplicadas ao ensino de astronomia no Ensino Médio

    NASA Astrophysics Data System (ADS)

    Albrecht, E.; Voelzke, M. R.

    2009-03-01

    O presente trabalho de intervenção foi realizado junto à Escola Estadual Colònia dos Pescadores na cidade de Caraguatatuba, com très turmas do terceiro ano do Ensino Médio, envolvendo 119 alunos com idades entre 16 e 19 anos. A fase inicial foi composta de um questionário de vinte questíes dissertativas e objetivas, aplicado pelo professor titular da sala, que era o mesmo nas très turmas, para diagnosticar nos educandos os conceitos prévios sobre Astronomia e, partindo destes realizar um trabalho de intervenção nas classes envolvidas utilizando, em cada uma, metodologias diferentes: (A) sob forma de seminários, elaborados e apresentados pelos educandos, no qual o educador faz apenas as intervençíes necessárias; (B) de forma tradicional, com auxílio de multimídias para desenvolvimento das aulas e a terceira (C) tradicional, fazendo uso exclusivo de lousa e giz. Ao final do trabalho os alunos responderam novamente o questionário inicial para diagnosticar dentre as très metodologias utilizadas qual apresentou melhores aplicaçíes, os resultados iniciais foram comparados com os finais. Quando questionados a respeito do significado de Astronomia observou-se inicialmente que os acertos na turma A foram de 100%, turma B: 64%, turma C: 84%, após a intervenção os acertos foram: 100%, 97% e 85% respectivamente, demonstrando que houve um avanço significativo na turma B, a turma A manteve seu índice e a turma C evoluiu, porém não tanto quanto a B. Quando interrogados sobre quantos planetas vocè acha que existem em nosso Sistema Solar? os acertos foram: turma A: 39%, turma B: 48% e turma C: 46%, após o desenvolvimento do trabalho os acertos foram 94%, 97% e 90% respectivamente. Dentro das respostas obtidas observa-se que a metodologia tradicional com o auxílio de multimeios, aplicada na turma B, demonstrou melhores resultados, sendo a mais significativa. Outra conclusão muito importante é que apesar de o tema Astronomia ser amplamente recomendado, este não é ensinado, nem no Ensino Fundamental, nem no Ensino Médio.

  5. 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.

  6. 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.

  7. Supplementary Figure 1 Schematics and characterization of our AO two-photon fluorescence microscope.

    E-print Network

    Cai, Long

    microscope. (a) Essential components of our AO two-photon fluorescence microscope: Ti:Sapphire laser in this paper, where the active area of the SLM (colored squares) is inscribed to the back pupil) Corrective wavefront in units of waves in (f). Crosses mark the neurons on which AO correction was carried

  8. Requirements for AO-ELT operation and ELT site monitor Andrei Tokovinin1,a

    E-print Network

    Tokovinin, Andrei A.

    Standard and advanced queue scheduling Extremely large telescopes (ELTs) will work with adaptive-optics (AO tomography. Nights good for some instruments are not so good for others, so there is a clear advantage to go will not be the best choice for ELTs, however. Their AO systems will use laser guide stars (LGSs) and tomography

  9. 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…

  10. AOS: an anonymous overlay system for mobile ad hoc networks Rui Zhang Yanchao Zhang Yuguang Fang

    E-print Network

    Latchman, Haniph A.

    AOS: an anonymous overlay system for mobile ad hoc networks Rui Zhang · Yanchao Zhang · Yuguang anonymous communications in mobile ad hoc networks (MANETs) is an effective coun- termeasure against malicious traffic analysis. This paper presents AOS, an Anonymous Overlay System for MA- NETs, which

  11. LDEF: Dosimetric measurement results (AO 138-7 experiment)

    NASA Technical Reports Server (NTRS)

    Bourrieau, J.

    1993-01-01

    One of the objectives of the AO 138-7 experiment on board the Long Duration Exposure Facility (LDEF) was a total dose measurement with Thermo Luminescent Detectors (TLD 100). Two identical packages, both of them including five TLD's inside various aluminum shields, are exposed to the space environment in order to obtain the absorbed dose profile. Radiation fluence received during the total mission length was computed, taking into account the trapped particles (AE8 and AP8 models during solar maximum and minimum periods) and the cosmic rays; due to the magnetospheric shielding the solar proton fluences are negligible on the LDEF orbit. The total dose induced by these radiations inside a semi infinite plane shield of aluminum are computed with the radiation transport codes available at DERTS. The dose profile obtained is in good agreement with the evaluation by E.V. Benton. TLD readings are performed after flight; due to the mission duration increase a post flight calibration was necessary in order to cover the range of the in flight induced dose. The results obtained, similar (plus or minus 30 percent) for both packages, are compared with the dose profile computation. For thick shields it seems that the measurements exceed the forecast (about 40 percent). That can be due to a cosmic ray and trapped proton contributions coming from the backside (assumed as perfectly shielded by the LDEF structure in the computation), or to an underestimate of the proton or cosmic ray fluences. A fine structural shielding analysis should be necessary in order to determine the origin of this slight discrepancy between forecast and in flight measurements. For the less shielded dosimeters, mainly exposed to the trapped electron flux, a slight overestimation of the dose (less than 40 percent) appears. Due to the dispersion of the TLD's response, this cannot be confirmed. In practice these results obtained on board LDEF, with less than a factor 1.4 between measurements and forecast, reinforce the validity of the computation methods and models used for the long term evaluation of the radiation levels (flux and dose) encountered in space on low inclination and altitude Earth orbits.

  12. 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

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

    NASA Astrophysics Data System (ADS)

    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

    2013-02-01

    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.

  14. GLAS/NAOMI: ground-layer AO at the William Herschel Telescope

    NASA Astrophysics Data System (ADS)

    Benn, Chris; Abrams, Don; Agocs, Tibor; Cano, Diego; Gregory, Tom; Guerra, Juan Carlos; Martin, Olivier; Morris, Tim; Myers, Richard; Rix, Samantha; Rutten, Rene; Skillen, Ian; Skvar?, Jure; Tulloch, Simon

    2008-07-01

    GLAS is an upgrade of the William Herschel Telescope's existing natural-guide-star (NGS) AO system NAOMI to incorporate a 20-W Rayleigh laser guide star (LGS) projected to an altitude of 15 km. It is currently being commissioned on-sky, and we review here the current status of the project. GLAS/NAOMI delivers dramatic improvements in PSF in both the near-IR (AO-corrected FWHM close to the diffraction limit, >~ 0.15 arcsec) and in the optical (factor of ~ 2 reduction in FWHM). The performance is similar to that with NGS, and is consistent with predictions from modelling. The main advantage over NGS AO is the large gain in sky coverage (from ~ 1% to ~ 100% at galactic latitude 40°). GLAS provides the first on-sky demonstration of closed-loop ground-layer AO (GLAO), and is the first Rayleigh LGS AO system to be offered for general use, at any telescope.

  15. Practical experience with AO PSF reconstruction at the Keck and Gemini telescopes

    NASA Astrophysics Data System (ADS)

    Jolissaint, Laurent; Neyman, Chris; Wizinowich, Peter; Christou, Julian

    2011-09-01

    Estimating the point spread function across the imaged field, for a given AO run, is critical for AO data reduction. In this talk I will describe our recent progress (Summer 2011) on PSF reconstruction for the Gemini North (ALTAIR) and Keck NGS based AO systems. I will shortly re-introduce the basic theory, but will put the emphasize on practical implementation issues we are facing at this two facilities, in particular how we handle and determine/calibrate the non-turbulent aberrations (telescope, instrument optics) whose amplitude can be as large as the turbulent aberrations.

  16. 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).

  17. The Association of Management and the International Association of Management (AoM / IAoM)

    NSDL National Science Digital Library

    1998-01-01

    The Association of Management and the International Association of Management (AoM/IAoM), publisher of the Journal of Management Systems (JMS), recently held its 16th Annual Conference in Chicago, Illinois to promote growth in management research and practice. AoM/IAoM is a non-profit organization of academicians and management practitioners, with divisions ranging from organizational and human resources to information systems and technology. Separate listervs exist for each division, and AoM/IAoM membership, publication, and conference information is available online.

  18. Degree Major Description TotalWhite Afr AmSchool Dept AOS Am Ind Asian/Pac Isl Hispanic Unknown UNCG 2008-09 Masters/Specialist Degree Recipients by School, Department, Major, AOS Code, and Ethnicity

    E-print Network

    Saidak, Filip

    Degree Major Description TotalWhite Afr AmSchool Dept AOS Am Ind Asian/Pac Isl Hispanic Unknown of 6 #12;Degree Major Description TotalWhite Afr AmSchool Dept AOS Am Ind Asian/Pac Isl Hispanic AOS Am Ind Asian/Pac Isl Hispanic Unknown UNCG 2008-09 Masters/Specialist Degree Recipients by School

  19. Degree Major Description TotalWhite Afr AmSchool Dept AOS Am Ind Asian/Pac Isl Hispanic Unknown UNCG 2008-09 Undergraduate Degree Recipients by School, Department, Major, AOS Code, and Ethnicity

    E-print Network

    Saidak, Filip

    Degree Major Description TotalWhite Afr AmSchool Dept AOS Am Ind Asian/Pac Isl Hispanic Unknown Description TotalWhite Afr AmSchool Dept AOS Am Ind Asian/Pac Isl Hispanic Unknown UNCG 2008-09 UndergraduateSchool Dept AOS Am Ind Asian/Pac Isl Hispanic Unknown UNCG 2008-09 Undergraduate Degree Recipients by School

  20. Keck AO survey of Io global volcanic activity between 2 and 5 ?m

    Microsoft Academic Search

    F. Marchis; D. Le Mignant; F. H. Chaffee; A. G. Davies; S. H. Kwok; R. Prangé; I. de Pater; P. Amico; R. Campbell; T. Fusco; R. W. Goodrich; A. Conrad

    2005-01-01

    We present in this Keck AO paper the first global high angular resolution observations of Io in three broadband near-infrared filters: Kc (2.3 ?m), Lp (3.8 ?m), and Ms (4.7 ?m). The Keck AO observations are composed of 13 data sets taken during short time intervals spanning 10 nights in December, 2001. The MISTRAL deconvolution process, which is specifically aimed

  1. Towards the Architectural Definition of the Health Watcher System with AO-ADL

    Microsoft Academic Search

    Monica Pinto; Nadia Gamez; Lidia Fuentes

    2007-01-01

    AO-ADL is an aspect-oriented architecture description language. The main contributions of AO-ADL are two. First contribution is the definition of a symmetric composition model, where functional and non-functional concerns are modeled by the same architectural block. Second contribution is the extension of the semantic of connectors with aspectual composition information. In this paper we describe the software architecture of the

  2. Coordenadas no plano As coordenadas (a, b) de um vetor V s~ao os coeficientes da

    E-print Network

    Dutenhefner, Francisco

    . #12;Rota¸c~ao do sistema de coordenadas Considere agora um outro sistema de coordenadas x y obtido de xy por uma rota¸c~ao de ^angulo . #12;Rota¸c~ao do sistema de coordenadas Considere agora um outro Considere agora um outro sistema de coordenadas x y obtido de xy por uma rota¸c~ao de ^angulo . Os vetores

  3. Functional analysis of AoAtg11 in selective autophagy in the filamentous fungus Aspergillus oryzae.

    PubMed

    Tadokoro, Takayuki; Kikuma, Takashi; Kitamoto, Katsuhiko

    2015-07-01

    Autophagy is a highly conserved cellular degradation process in eukaryotes and consists of both non-selective and selective types. Selective autophagic processes include pexophagy, mitophagy, and the cytoplasm-to-vacuole targeting (Cvt) pathway of yeast, in which particular vacuolar proteins, such as aminopeptidase I (Ape1), are selectively transported to vacuoles. Although selective autophagy has been mainly studied in the yeasts Saccharomyces cerevisiae and Pichia pastoris, there is evidence for selective autophagy in filamentous fungi; however, the details are poorly understood. In S. cerevisiae, Atg11 is a selective autophagy-specific protein that recognizes and transports substrates to the pre-autophagosomal structure (PAS). Here, we first identified an ATG11 homologue in the filamentous fungus Aspergillus oryzae and analyzed the localization of the corresponding protein, designated AoAtg11, fused to enhanced green fluorescent protein (EGFP). Imaging analysis revealed that AoAtg11-EGFP was localized to PAS-like structures. We next constructed an Aoatg11 disruptant of A. oryzae and showed that AoAtg11 is involved in pexophagy and mitophagy. In addition, AoAtg11 was found to be dispensable for non-selective autophagy and for transporting AoApe1 to vacuoles. Taken together, these results suggest that AoAtg11 is a selective autophagy-specific protein in A. oryzae, and has distinct molecular functions from that of S. cerevisiae Atg11. PMID:26058532

  4. Direito ao adicional noturno deve incidir sobre as horas prorrogadas O Tribunal Superior do Trabalho Assessoria de Comunicao Social A

    E-print Network

    Floeter, Sergio Ricardo

    Direito ao adicional noturno deve incidir sobre as horas prorrogadas O Tribunal Superior do a jurisprudência do TST (Súmula nº 60, item II) "não deixa a mínima dúvida de que o direito ao adicional noturno, obteve no Tribunal Regional do Trabalho da 4ª Região (RS) o reconhecimento ao direito de receber com o

  5. Degree Major Description TotalWhite Afr AmSchool Dept AOS Am Ind Asian Pac Isl Unknown

    E-print Network

    Saidak, Filip

    Degree Major Description TotalWhite Afr AmSchool Dept AOS Am Ind Asian Haw / Pac Isl Unknown Major Description TotalWhite Afr AmSchool Dept AOS Am Ind Asian Haw / Pac Isl Unknown Undergraduate. #12;Degree Major Description TotalWhite Afr AmSchool Dept AOS Am Ind Asian Haw / Pac Isl Unknown

  6. Degree Major Description TotalWhite Afr AmSchool Dept AOS Am Ind Asian Pac Isl Other

    E-print Network

    Saidak, Filip

    Degree Major Description TotalWhite Afr AmSchool Dept AOS Am Ind Asian Haw / Pac Isl Other Graduate Asian Haw / Pac Isl Other Graduate Enrollment by School, Department, Major, AOS Code, and Ethnicity Asian Haw / Pac Isl Other Graduate Enrollment by School, Department, Major, AOS Code, and Ethnicity

  7. Degree Major Description TotalWhite Afr AmSchool Dept AOS Am Ind Asian Pac Isl Other

    E-print Network

    Saidak, Filip

    Degree Major Description TotalWhite Afr AmSchool Dept AOS Am Ind Asian Haw / Pac Isl Other. #12;Degree Major Description TotalWhite Afr AmSchool Dept AOS Am Ind Asian Haw / Pac Isl Other Asian Haw / Pac Isl Other Undergraduate Enrollment by School, Department, Major, AOS Code, and Ethnicity

  8. Degree Major Description TotalWhite Afr AmSchool Dept AOS Am Ind Asian Pac Isl Unknown

    E-print Network

    Saidak, Filip

    Degree Major Description TotalWhite Afr AmSchool Dept AOS Am Ind Asian Haw / Pac Isl Unknown Am Ind Asian Haw / Pac Isl Unknown Undergraduate Enrollment by School, Department, Major, AOS Code Isl Unknown Undergraduate Enrollment by School, Department, Major, AOS Code, and Ethnicity,

  9. Degree Major Description TotalWhite Afr AmSchool Dept AOS Am Ind Asian Pac Isl Unknown

    E-print Network

    Saidak, Filip

    Degree Major Description TotalWhite Afr AmSchool Dept AOS Am Ind Asian Haw / Pac Isl Unknown Asian Haw / Pac Isl Unknown Graduate Enrollment by School, Department, Major, AOS Code, and Ethnicity Am Ind Asian Haw / Pac Isl Unknown Graduate Enrollment by School, Department, Major, AOS Code

  10. Frustum Culling Hibrido em CPU e GPU para Visualizac~ao de Modelos Massivos em Tempo Real

    E-print Network

    Barbosa, Alberto

    ´etrica de mode- los 3D para sua visualizac¸~ao. Com o advento da GPGPU (General-Purpose computation to re- duce the geometric complexity of 3D models for visualiza- tion. GPGPU (General~ao processadores origi- nalmente dedicados para c´alculos gr´aficos e s~ao altamente paralelizados. Nos ´ultimos

  11. Correction of eye-motion artifacts in AO-OCT data sets

    NASA Astrophysics Data System (ADS)

    Capps, Arlie G.; Zawadzki, Robert J.; Yang, Qiang; Arathorn, David W.; Vogel, Curtis R.; Hamann, Bernd; Werner, John S.

    2011-03-01

    Eye movements present during acquisition of a retinal image with optical coherence tomography (OCT) introduce motion artifacts into the image, complicating analysis and registration. This effect is especially pronounced in highresolution data sets acquired with adaptive optics (AO)-OCT instruments. Several retinal tracking systems have been introduced to correct retinal motion during data acquisition. We present a method for correcting motion artifacts in AOOCT volume data after acquisition using simultaneously captured adaptive optics-scanning laser ophthalmoscope (AOSLO) images. We extract transverse eye motion data from the AO-SLO images, assign a motion adjustment vector to each AO-OCT A-scan, and re-sample from the scattered data back onto a regular grid. The corrected volume data improve the accuracy of quantitative analyses of microscopic structures.

  12. An analysis on the physical process of the influence of AO on ENSO

    NASA Astrophysics Data System (ADS)

    Chen, Shangfeng; Yu, Bin; Chen, Wen

    2014-02-01

    The influence of the spring AO on ENSO has been demonstrated in several recent studies. This analysis further explores the physical process of the influence of AO on ENSO using the NCEP/NCAR reanalysis data over the period 1958-2010. We focus on the formation of the westerly wind burst in the tropical western Pacific, and examine the evolution and formation of the atmospheric circulation, atmospheric heating, and SST anomalies in association with the spring AO variability. The spring AO variability is found to be independent from the East Asian winter monsoon activity. The spring AO associated circulation anomalies are supported by the interaction between synoptic-scale eddies and the mean-flow and its associated vorticity transportation. Surface wind changes may affect surface heat fluxes and the oceanic heat transport, resulting in the SST change. The AO associated warming in the equatorial SSTs results primarily from the ocean heat transport in the face of net surface heat flux damping. The tropical SST warming is accompanied by anomalous atmospheric heating in the subtropical north and south Pacific, which sustains the anomalous westerly wind in the equatorial western Pacific through a Gill-like atmospheric response from spring to summer. The anomalous westerly excites an eastward propagating and downwelling equatorial Kelvin wave, leading to SST warming in the tropical central-eastern Pacific in summer-fall. The tropical SST, atmospheric heating, and atmospheric circulation anomalies sustain and develop through the Bjerknes feedback mechanism, which eventually result in an El Niño-like warming in the tropical eastern Pacific in winter.

  13. 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

  14. Rise of the Machines: Automated Laser Guide Star Adaptive Optics Observations of Thousands of Objects with Robo-AO

    NASA Astrophysics Data System (ADS)

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

    2013-01-01

    Robo-AO is the first fully automated laser guide star adaptive optics instrument. Robo-AO has completed thousands of automated AO observations at the visible diffraction limit for several scientific programs during its first semester of science observations. These programs include: the Ultimate Binarity Survey to examine stellar binarity properties across the main sequence and beyond; a survey of 1,000 Kepler objects of interest; the multiplicity of solar type stars; and several programs for high precision astrometric observations. A new infrared camera is under development for Robo-AO, and a clone of the system is in the planning stages. This presentation will discuss the Robo-AO instrument capabilities, summarize the science programs undertaken, and discuss the future of Robo-AO.

  15. Effect of turnoff time on characteristics of the output pulse in an AO Q-switched laser

    Microsoft Academic Search

    Wenchao Qiao; Shengzhi Zhao; Guiqiu Li; Kejian Yang; Ming Li; Jing An; Jing Wang

    2009-01-01

    A laser-end-diode-pumped actively Q-switched Nd:YVO4 laser with acoustic-optic (AO) modulator is realized. By changing the position of AO in the cavity for changing the transit time of the acoustic-wave, the effect of the AO turnoff time on the characteristics of the output Q-switched pulse is obtained. The experimental results show that the longer transit time leads to the wider pulse

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

    E-print Network

    Rodrigues, Luís E.T.

    HAMP- Protocolo de Difus~ao em Grupo Para Redes Com Padr~oes de Mobilidade Heterog´eneos Oksana´is Rodrigues INESC-ID / IST ler@ist.utl.pt Resumo--A difus~ao em grupo ´e ´util para suportar diferentes aplicac¸~oes em MANETs, incluindo a disseminac¸~ao de dados, descoberta de servic¸os, publicac

  17. AOS: an anonymous overlay system for mobile ad hoc networks Rui Zhang Yanchao Zhang Yuguang Fang

    E-print Network

    Zhang, Yanchao

    and quantitative analysis. Keywords Ad hoc networks Á Anonymous communication Á Onion routing Á Overlay 1 communications and secure routing in MANETs and enables providing both at the same time. Last but not least, AOS have to be left in clear to enable multi-hop routing. Attackers thus can learn packet sources

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

    E-print Network

    , Olga R.P. Bellon2 , Luciano Silva2 Ademir J. Menegazzo3 , M´arcia L.H. Thomaz3 e Vivian C. Ruzik3 1 Edward Richard Henry, por volta de 1890, que a identificac¸~ao atrav´es das impress~oes digitais passou

  19. Aerosol Observing Systems (AOS), New Capabilities for ASR Researchers Stephen R. Springston (srs@bnl.gov)

    E-print Network

    (MAOS) with an extended instrument suite, are coming on line as part of the ARM Climate Research AOS, again at the Site Collector Computer and at the ARM Data Management Facility. A system as part of StormVEx. Data from core instruments and two guest instruments are being recorded. Core

  20. MAT 103 --COMPLEMENTOS DE MATEM ATICA PARA CONTABILIDADE E ADMINISTRAC ~AO

    E-print Network

    Piccione, Paolo

    supondo agora que a, b R, a > 0, b > 0 e, m e n s~ao n´umeros inteiros, ou seja, m, n Z = {. . . , -3/n = (1/a)|m|/|n| . Mostre as igualdades do exerc´icio 3 supondo agora que a, b R, a > 0, b > 0 e, m e n

  1. Rastreamento de Multiplas Larvas utilizando Tecnicas de Vis~ao Computacional: Resultados Preliminares

    E-print Network

    Lewiner, Thomas (Thomas Lewiner)

    Grupo de Pesquisa INOVISAO para contagem de larvas vivas em testes de larvicidas para o mosquito daRastreamento de M´ultiplas Larvas utilizando T´ecnicas de Vis~ao Computacional: Resultados resultados preliminares de um experimento com filtros de part´iculas para rastreamento de m´ultiplas larvas

  2. MODELING AND ANALYSIS OF STOCHASTIC HYBRID SYSTEMS Jo~ao P. Hespanha

    E-print Network

    Hespanha, João Pedro

    of the results obtained is evaluated through comparisons with Monte Carlo simulations. I. INTRODUCTION Hybrid1 MODELING AND ANALYSIS OF STOCHASTIC HYBRID SYSTEMS Jo~ao P. Hespanha Center for Control@ece.ucsb.edu http://www.ece.ucsb.edu/~hespanha Abstract The author describes a model for Stochastic Hybrid Systems

  3. Stochastic Hybrid Systems with Renewal Transitions Duarte Antunes, Jo~ao P. Hespanha, and Carlos Silvestre

    E-print Network

    Hespanha, João Pedro

    Stochastic Hybrid Systems with Renewal Transitions Duarte Antunes, Jo~ao P. Hespanha, and Carlos Silvestre Abstract-- We consider Stochastic Hybrid Systems (SHSs) for which the lengths of times intervals between data transmissions and delays. I. INTRODUCTION A Hybrid System is a system with both

  4. Spectroscopy, dynamics, and c aos of the CS, molecule: Fourier transform and phase-space analysis

    E-print Network

    Spectroscopy, dynamics, and c aos of the CS, molecule: Fourier transform and phase-space analysis J sevenparameters.Analysis of the spectraby the statistical Fourier transform technique. P. Pique@ and M. Joyeux Laboratoire de Spectromktrie Physique, Universitt Joseph Fourier de Grenoble

  5. Stochastic Impulsive Systems Driven by Renewal Processes Jo~ao P. Hespanha and Andrew R. Teel

    E-print Network

    Hespanha, João Pedro

    Stochastic Impulsive Systems Driven by Renewal Processes Jo~ao P. Hespanha and Andrew R. Teel Abstract-- Stochastic impulsive systems are defined by a diffusion process with jumps triggered construct a model for such systems based on jump-diffusion equations and provide Lyapunov-based conditions

  6. A Connectionist Architecture for the Evolution Jo~ao M. Martins and Eduardo R. Miranda

    E-print Network

    Miranda, Eduardo Reck

    A Connectionist Architecture for the Evolution of Rhythms Jo~ao M. Martins and Eduardo R. Miranda Interdisciplinary Centre for Computer Music Research University of Plymouth, Plymouth, Devon PL4 8AA United Kingdom-organisation of internal rhythmic representations. The agents' architecture includes connection- ist models to process

  7. AO\\/NAO response to climate change: 1. Respective influences of stratospheric and tropospheric climate changes

    Microsoft Academic Search

    D. Rind; J. Perlwitz; P. Lonergan

    2005-01-01

    We utilize the GISS Global Climate Middle Atmosphere Model and eight 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)

  8. 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,Tucson, Arizona 85745 ABSTRACT The adaptive optics system for the Gemini South telescope, currently in the design, electronic and controls issues. Key words: Multi-conjugate adaptive optics, laser guide stars, adaptive

  9. AO 133 (Rev. 12/09) Bill of Costs UNITED STATES DISTRICT COURT

    E-print Network

    Shamos, Michael I.

    . By: Clerk of Court Deputy Clerk Date (See Exhibit 1) (See Exhibits 2 and 3) (See Exhibits 4 and 5AO 133 (Rev. 12/09) Bill of Costs UNITED STATES DISTRICT COURT for the __________ District , Date the Clerk is requested to tax the following as costs: Fees of the Clerk

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

    Microsoft Academic Search

    Ann F. Whitaker; Leighton E. Young

    1991-01-01

    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

  11. Stereo estimation of depth along virtual cut planes Michel Antunes and Jo~ao P. Barreto

    E-print Network

    Barreto, Joao

    through comparative experiments that SymStereo is partic- ularly well suited for recovering depth along by associating pixels in two calibrated images acquired from different viewpoints. The stereo ap- proaches canStereo estimation of depth along virtual cut planes Michel Antunes and Jo~ao P. Barreto Institute

  12. AO26: Testing the potential for space-based monitoring of air Candidate number: 463757

    E-print Network

    Oxford, University of

    AO26: Testing the potential for space-based monitoring of air pollution Candidate number: 463757 Atmospheric Sounding Interferome- ter (IASI) tracking ammonia is now possible via satellite on a global scale being emitted from this sec- tor; a combination of livestock waste, fertilisers and crops (Galloway et

  13. Nearly every normal modal logic is paranormal Jo~ao Marcos 1,2,3

    E-print Network

    Lisboa, Universidade Técnica de

    Nearly every normal modal logic is paranormal Jo~ao Marcos 1,2,3 http://geocities.com/jm logica/ 1-overcomplete; paracomplete logics are negation-incomplete yet non-over- complete. A paranormal logic is simply a logic to some latent paranormality: It is paracomplete with respect to a negation defined as an impossibility

  14. Nearly every normal modal logic is paranormal Jo~ao Marcos 1,2,3

    E-print Network

    Lisboa, Universidade Técnica de

    Nearly every normal modal logic is paranormal Jo~ao Marcos 1,2,3 http://www.geocities.com/jm logica logics are nega- tion-incomplete yet non-overcomplete. A paranormal logic is simply a logic that is both latent paranormality: It is paracomplete with respect to a negation defined as an impossibility operator

  15. An efficient variant of the RSA cryptosystem Cesar Alison Monteiro Paix~ao

    E-print Network

    An efficient variant of the RSA cryptosystem Cesar Alison Monteiro Paix~ao capaixao combination of two variants of RSA cryptosystem (MPrime and Rebalanced RSA) analysed by Boneh and Schacham [2 present an extension of the work of Boneh and Shacham on some variants of the RSA cryptosystem. We review

  16. Performance of a MEMS-based AO-OCT system using Fourier Reconstruction

    SciTech Connect

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

    2009-01-21

    Adaptive optics (AO) and optical coherence tomography (OCT) are powerful imaging modalities that, when combined, can provide high-resolution (3.5 {micro}m isotropic), 3-D images of the retina. The AO-OCT system at UC Davis has demonstrated the utility of this technology for microscopic, volumetric, in vivo retinal imaging. The current system uses an AOptix bimorph deformable mirror (DM) for low-order, high-stroke correction and a 140-actuator Boston Micromachines DM for high-order correction. Developments to improve performance or functionality of the instrument are on-going. Based on previous work in system characterization we have focused on improved AO control. We present preliminary results and remaining challenges for a newly implemented Fourier transform reconstructor (FTR). The previously reported error budget analysis is also reviewed and updated, with consideration of how to improve both the amount of residual error and the robustness of the system. Careful characterization of the AO system will lead to improved performance and inform the design of future systems.

  17. O Tempo como Modelo: A Aplicac~ao de L'ogicas Temporais

    E-print Network

    Vasconcelos, Wamberto

    ENGENHARIA DE SIS­ TEMAS E COMPUTA ¸ C ~ AO. Aprovada por: Profa. Sheila R. M. Veloso, D.Sc. (Presidente'arcia Fernandes, Marcos Villas, Mau Ling, Maur'icio Solar, Monica Vil­ lanueva, Morganna Diniz, Rui Chiou, Roseli Peixoto de Vasconcelos Setembro de 1989 Orientador: Sheila R. M. Veloso Programa: Engenharia de Sistemas e

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

    SciTech Connect

    Yin Naida [Key Laboratory of Biodiversity and Conservation of Aquatic Organisms, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, Hubei 430072 (China); Graduate University of Chinese Academy of Sciences, Beijing 100049 (China); Jin Xia; He Jiangyan [Key Laboratory of Biodiversity and Conservation of Aquatic Organisms, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, Hubei 430072 (China); Yin Zhan [Key Laboratory of Biodiversity and Conservation of Aquatic Organisms, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, Hubei 430072 (China); Graduate University of Chinese Academy of Sciences, Beijing 100049 (China)], E-mail: zyin@ihb.ac.cn

    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.

  19. 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

  20. Penso Concubina O Superior Tribunal de Justia negou a uma concubina o direito ao recebimento

    E-print Network

    Floeter, Sergio Ricardo

    Pensão Concubina O Superior Tribunal de Justiça negou a uma concubina o direito ao recebimento de companheira de homem casado, desde que separado de fato ou de direito, divorciado ou viúvo, o direito na://lfg.jusbrasil.com.br/noticias/966411/sexta-turma-do-stj-decide- concubina-nao-tem-direito-a-dividir-pensao-com-esposa #12;

  1. Displaying page layout variables Kent McPherson a.o.*

    E-print Network

    Displaying page layout variables Kent McPherson a.o.* 1995/06/25 1 Introduction This LATEX 2"package is a reimplementation of layout.sty by Kent McPherson. It defines the command \\layout which produces an overview of the layout of the current document. 2

  2. Displaying page layout variables Kent McPherson a.o. \\Lambda

    E-print Network

    Displaying page layout variables Kent McPherson a.o. \\Lambda 1995/06/25 1 Introduction This L A T E X2 '' package is a reimplementation of layout.sty by Kent McPherson. It defines the command ``layout which produces an overview of the layout of the current document. 2 The implementation This package

  3. Displaying page layout variables Kent McPherson a.o.*

    E-print Network

    Mintmire, John W.

    Displaying page layout variables Kent McPherson a.o.* 2000/09/25 1 Introduction This LATEX 2"package is a reimplementation of layout.sty by Kent McPherson. It defines the command \\layout which produces an overview of the layout of the current document. The command

  4. Analise do Impacto da Rede Social na Marcac~ao de Fotos como Favoritas no Flickr1

    E-print Network

    Cirne, Walfredo

    An´alise do Impacto da Rede Social na Marcac¸~ao de Fotos como Favoritas no Flickr1 Luiz Alves favoritos. Neste trabalho analisamos o impacto da rede de contatos na avaliac¸~ao de fotos utilizando dados da rede social Flickr1 , um dos mais importantes sites de compartilhamento de fotos, que possui milh

  5. BUSCA LOCAL PARA POS-PROCESSAMENTO EM RESULTADOS DE OTIMIZAC~AO MULTI-OBJETIVO EM REDES DE FILAS

    E-print Network

    Cruz, Frederico

    topologia pr´e-especificada no sistema de filas. Potenciais usu´arios destes modelos de otimiza fato, tais modelos podem auxiliar na compreens~ao e melhoria de v´arios sistemas reais, incluindo otimiza¸c~ao de redes de filas finitas, a capacidade total do sistema em ´areas de espera deve ser a menor

  6. [Degradation of azo dye acid orange 7(AO7) by heat, ZVI and heat/ZVI activated persulfate].

    PubMed

    Zhang, Cheng; Wan, Jin-Quan; Ma, Yong-Wen; Wang, Yan; Huang, Ming-Zhi

    2011-10-01

    Effects of temperatures, PS concentrations and ZVI dosages on AO7 decomposition were investigated in sole heat and ZVI activating systems. The degradation results of two systems were compared for selecting a better activating way for AO7 degradation and finally the two activating ways were combined for getting the optimal AO7 degradation efficiency. The degradation of AO7 by Heat/PS systems followed pseudo first-order kinetics. The reaction rates increased with increasing reaction temperatures (elevated from room temperature to 90 degrees C) and also increased when initial PS concentrations varied from 1 to 12 mmol x L(-1). For ZVI activating systems (ZVI/PS systems), the degradation rate of AO7 was the highest when ZVI dose was 0.2 g, and it reached to 95.6% within 90 min. Comparing ZVI/PS systems with Heat/PS systems, the results showed that the ZVI activation was a more effective way to activate PS than the heat activation for AO7 degradation. AO7 degradation processes by ZVI/heat/PS systems were two-stage pseudo first-order kinetic processes, and the combining of two activating ways significantly increased the reaction rates. By the addition of ZVI to the Heat/PS system, the apparent activation energy E(a) of AO7 degradation reduced from the original 130.26 kJ x mol(-1) to 27.70 kJ x mol(-1). PMID:22279907

  7. Agglomeratic olivine (AO) objects and Type II chondrules in ordinary chondrites: Accretion and melting of dust to form ferroan chondrules

    NASA Astrophysics Data System (ADS)

    Ruzicka, Alex; Floss, Christine; Hutson, Melinda

    2012-01-01

    Agglomeratic olivine objects (AO objects) and possibly related chondrules in three ordinary chondrites (NWA 4910 [LL3.1], NWA 3127 [LL3.1], Sahara 98175 [LL3.5]) were studied using petrographic and microanalytical techniques to evaluate the origins of these materials. AO objects are mixtures of fine-grained (?5-10 ?m-diameter) ferroan (Fa 12-35) olivine, troilite that is often concentrated towards the periphery of objects, pyroxene, feldspathic material, relict magnesian olivine and pyroxene grains, and relict chondrules. One micro-CAI with a grossite core was also found. AO objects commonly rim chondrules. AO objects show transitional variations in texture and chemistry with Type II chondrules, ranging from AO objects that are finer grained and show no evidence of melting (AO-U objects), to weakly melted and more melted AO objects (AO-WM and AO-M objects, respectively), to fine-grained Type II chondrules (olivine grain size ˜5-60 ?m), to coarse-grained Type II chondrules (olivine grain size ˜10-250 ?m across); S contents and Na/Al values are typically higher in AO objects than in Type II chondrules. The properties of AO objects and Type II chondrules are interpreted to reflect progressive heating of dust of quasi-chondritic composition, accompanied by grain coarsening during melting, partial loss of the most volatile elements (chiefly S, also Na) during evaporative melting, and back-reaction with gas, to form troilite-rimmed AO objects. Data-model comparisons suggest that progressive heating of chondritic dust to form AO objects and Type II chondrules could have occurred in a dusty environment to yield a transient, oxidizing gas of high pressure (˜10 -3 bar), with gas derived from vaporized dust being much (>500-1000× or even up to 10 4-10 5×) more abundant than ambient solar composition gas. AO objects are protochondrules, but are themselves composed of chondrule debris of different types, suggesting that they represent one step of a chondrule recycling process that also included chondrule disaggregation and additional chemical processing. Our data appear to be compatible with the nebular shock wave model for chondrule formation.

  8. Increasing sky coverage with the Gemini North ALTAIR/LGS AO system

    NASA Astrophysics Data System (ADS)

    Christou, Julian C.; Boccas, Maxime; Ebbers, Angelic; McDermid, Richard M.; Oram, Richard; Trujillo, Chadwick; Walls, Brian

    2012-07-01

    The Gemini North (GN) AO system, Altair, has been routinely operating in LGS mode since 2007. Due to the initial optical design, the NGS field-of-view (FoV) is limited to a radius ~ 25" which limits the potential science. To improve this, we have tested the AO/LGS operation using a peripheral wavefront sensor (PWFS) whose patrol field is ~ 4'-7' from the target. This expanded NGS FoV permits greater sky coverage but with decreased resolution, FWHM ~ 0.1" - 0.2" making this mode very suitable for non-imaging spectrographic and integral field unit observations. We present the hardware and software upgrades to PWFS and Altair as well as the software necessary for making this observing mode a routine and integral part of GN operations. Characterization and performance of this new operation mode, known as LGS+P1, are presented.

  9. CCD Photometry of the Intermediate Polars FO Aquarii and AO Piscium

    NASA Astrophysics Data System (ADS)

    Williams, Glen

    2003-05-01

    We present timings of the dominant photometric oscillations in the intermediate polars FO Aqr and AO Psc for five observing seasons from 1992 through 2002. Unfortunately, cycle-count ambiguities prevent us from finding unique ephemerides for these oscillations. Both FO Aqr and AO Psc are presently in a state of spin-up of the white dwarf's rotation. We also present constraints on the white dwarf's magnetic moment and the disk's mass transfer rate under the condition implied by the white dwarf's equilibrium spin period and then the condition implied by the current rate of spin-up. It is shown that in FO Aqr, the disk luminosity should have increased from 1987, when the white dwarf's rotation switched from a state of spin-down to spin-up, to the present. We find no evidence for a gradual brightening of the system, however.

  10. 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.

  11. Capitulo 39 Operadores Lineares N~ao-Limitados em Espacos de

    E-print Network

    Barata, João Carlos Alves

    ´ido de um produto escalar, definindo-o por (, ), ( , ) := , H + , H 1J´anos von Neumann (1903­1957). Von Neumann tamb´em adotou os nomes de Johann von Neumann e John von Neumann. 2052 JCABarata. Curso de~ao-limitados em espa¸cos de Hilbert foi desenvolvida originalmente por von Neumann1 no final dos anos 20 e no in

  12. Analise Matematica III -Turma especial Fichas 1 a 5 -Soluc~ao parcial

    E-print Network

    Granja, Gustavo

    uma subcobertura finita, tem-se K BN (0) pelo que K ´e limitado. 1 #12;Vamos agora ver que K ´e´a contida em K, ou seja K ´e fechado. Suponhamos agora que K ´e limitado e fechado. Come¸camos por provar o. Isto conclui a demonstra¸c~ao deste caso particular. Mostramos agora que dada uma cobertura aberta {U

  13. The effect of the instrument environment on the Altair AO system

    NASA Astrophysics Data System (ADS)

    Christou, Julian; Neichel, Benoit; Rigaut, Francois

    2011-09-01

    The Altair AO system at Gemini North has been in regular operation for many years. Over the past few years we have been routinely monitoring its performance looking at the telemetry circular buffers from the nightly tuning, in particular the residual tip-tilt (TT). We present analysis of these data which illustrate how the instrument support structure (ISS) environment affects the residual TT and how different components of the TT signal is affected by the instrument compliment.

  14. Zur Behandlung pertrochanterer Frakturen im hohen Alter: Osteosynthese mit AO-Winkelplatte und Palacos

    Microsoft Academic Search

    H. Tscherne; R. Szyszkowitz

    1969-01-01

    Zusammenfassung  Es wird ber die Kombinationsosteosynthese mit einer pertrochanteren AO-Winkelplatte und dem Polymerisationskunststoff Palacos\\u000a bei 138 frischen pertrochanteren Oberschenkelbrchen berichtet. Die Methode ist bei Patienten im hohen Alter, in schlechtem\\u000a Allgemeinzustand und mit fortgeschrittener Osteoporose angezeigt, da eine volle Belastung ab dem ersten postoperativen Tag\\u000a auch bei unstabilen Bruchformen mglich ist. Operationstechnik, Komplikationen und Nachuntersuchungsergebnisse werden beschrieben.

  15. Biodegradation of bisphenol A by cells and cell lysate from Sphingomonas sp. strain AO1

    Microsoft Academic Search

    Miho Sasaki; Jun-ichi Maki; Ko-ichi Oshiman; Yoshinobu Matsumura; Tetsuaki Tsuchido

    2005-01-01

    The capacity and pathway of bisphenol A [BPA; 2,2-bis(4-hydroxyphenyl)propane] degradation in Sphingomonassp. strain AO1, which was isolated from the soil of a vegetable-growing field in Japan, were investigated. The bacterial strain was able to grow in a basal mineral salt medium containing BPA as the sole carbon source (BSMB medium), and was able to degrade 115 µ g?ml-1 BPA in

  16. An Alternative AO Mode and Its Role on the Salinification of the Eurasian Basin

    NASA Astrophysics Data System (ADS)

    Zhang, X.; Walsh, J. E.; Ikeda, M.

    2002-12-01

    The Arctic climate system has been undergoing dramatic changes in recent decades. Two salient features in atmosphere and ocean are characterized by the decreasing of sea level pressure (SLP) over the polar cap (Walsh et al., 1996; Thompson and Wallace, 1998) and the warming and salinification in the Eurasian Basin (Steel and Boyd, 1998). In order to investigate the coupling or linkage of the changes in atmosphere and ocean in the Arctic, we proposed an alternative AO mode, which is obtained by EOF analysis with the SLP north of 62.5N. Then, we employed an Arctic coupled ocean/sea-ice model to explore the roles of the AO mode play in the salinification of the Eurasian Basin. Steel and Boyd (1998) speculated that the salinification in the Eurasian Basin is caused by a shift in the region influenced by western Siberian river runoff due to changes of atmosphere circulation and sea-ice drift. This means that the inflow of river waters from the Kara and Laptev Seas shifted from the Amundsen to the Makarov Basin. Our modeling results support this speculation by Steel and Boyd (1998). However, our simulation proposed other two more critical mechanisms. Changes of sea-ice development and oceanic freshwater transport driven by the AO mode play important roles in the salinification. In the positive AO phase, sea-ice growth strengthens over the eastern Eurasian Basin, the western Makarov Basin and the Laptev Sea, which leads to more brine rejection. The changed ocean circulation reduces the transport of clod freshwater from the Beaufort Sea/Canada Basin towards the Eurasian Basin. Quantitative diagnosis was performed in this study.

  17. An improved model with bending of laser beam for satellite-to-ground AO laser communication

    Microsoft Academic Search

    Jian Rong; Fang Li; Xiao-chun Zhong; Xue-ke Ding; Guan Gui

    2007-01-01

    Correcting scintillation for a slant path with adaptive optics (AO) has been studied. However, the models for solving this problem are all to treat the ray track as a straight line. Based on the engineering practical environment, in a low-earth-orbit (LEO) satellite-to-ground laser communication link, the properties of laser beam bending in the slant path will be studied in this

  18. MICRORGANISMOS ASSOCIADOS A SEMENTES DE SOJA SUBMETIDAS AO ARMAZENAMENTO, À ASSEPSIA E À RETIRADA DE TEGUMENTO

    Microsoft Academic Search

    ADILSON BIZZETTO; MARTIN HOMECHIN

    RESUMO - Determinou-se a presença de microrg a- nismos associados a sementes de soja (Glycine max (L.) Merrill), armazenadas durante oito meses nas temperaturas de 18 oC e 22oC. As avaliações foram realizadas bimes- tralmente, sendo as sementes submetidas ou não ao proce s- so de assepsia com hipoclorito de sódio, e retirada ou não do tegumento. Foram incubadas em

  19. Delta-WIND Solar Panel Repair and Move at Cape Canaveral Air Station, Hangar AO

    NASA Technical Reports Server (NTRS)

    1994-01-01

    This NASA Kennedy Space Center video release presents footage of workcrews moving the WIND solar panel in order to make repairs in Hangar AO prior to launch at Cape Canaveral Air Station, Sep. 13, 1994. WIND was launched on November 1, 1994 and is the first of two NASA spacecraft in the Global Geospace Science initiative and part of the International Solar Terrestrial Physics (ISTP) Project.

  20. OCam with CCD220, the Fastest and Most Sensitive Camera to Date for AO Wavefront Sensing

    Microsoft Academic Search

    Philippe Feautrier; Jean-Luc Gach; Philippe Balard; Christian Guillaume; Mark Downing; Norbert Hubin; Eric Stadler; Yves Magnard; Michael Skegg; Mark Robbins; Sandy Denney; Wolfgang Suske; Paul Jorden; Patrick Wheeler; Peter Pool; Ray Bell; David Burt; Ian Davies; Javier Reyes; Manfred Meyer; Dietrich Baade; Markus Kasper; Robin Arsenault; Thierry Fusco; José Javier Diaz Garcia

    2011-01-01

    For the first time, subelectron readout noise has been achieved with a camera dedicated to astronomical wavefront-sensing applications. The OCam system demonstrated this performance at a 1300 Hz frame rate and with 240 × 240 pixel frame size. ESO and JRA2 OPTICON jointly funded e2v Technologies to develop a custom CCD for adaptive optics (AO) wavefront-sensing applications. The device, called

  1. Building portfolios of stocks in the S\\\\~ao Paulo Stock Exchange using Random Matrix Theory

    Microsoft Academic Search

    Leonidas Sandoval Junior; Adriana Bruscato

    2012-01-01

    Using Random Matrix Theory, we build a covariance matrix between stocks of the BM&F-Bovespa (Bolsa de Valores, Mercadorias e Futuros de S\\\\~ao Paulo) which is cleaned of some of the noise due to the complex interactions between the many stocks and the finiteness of available data, and use a regression model in order to remove the market effect due to

  2. Isolation and Characterization of an Agaro-Oligosaccharide (AO)-Hydrolyzing Bacterium from the Gut Microflora of Chinese Individuals

    PubMed Central

    Li, Miaomiao; Li, Guangsheng; Zhu, Liying; Yin, Yeshi; Zhao, Xiaoliang; Xiang, Charlie; Yu, Guangli; Wang, Xin

    2014-01-01

    Agarose (AP) from red algae has a long history as food ingredients in East Asia. Agaro-oligosaccharides (AO) derived from AP have shown potential prebiotic effects. However, the human gut microbes responsible for the degradation of AO and AP have not yet been fully investigated. Here, we reported that AO and AP can be degraded and utilized at various rates by fecal microbiota obtained from different individuals. Bacteroides uniformis L8 isolated from human feces showed a pronounced ability to degrade AO and generate D-galactose as its final end product. PCR-DGGE analysis showed B. uniformis to be common in the fecal samples, but only B. uniformis L8 had the ability to degrade AO. A synergistic strain, here classified as Escherichia coli B2, was also identified because it could utilize the D-galactose as the growth substrate. The cross-feeding interaction between B. uniformis L8 and E. coli B2 led to exhaustion of the AO supply. Bifidobacterium infantis and Bifidobacterium adolescentis can utilize one of the intermediates of AO hydrolysis, agarotriose. Growth curves indicated that AO was the substrate that most favorably sustained the growth of B. uniformis L8. In contrast, ?-carrageenan oligosaccharides (KCO), guluronic acid oligosaccharides (GO), and mannuronic acid oligosaccharides (MO) were found to be unusable to B. uniformis L8. Current results indicate that B. uniformis L8 is a special degrader of AO in the gut microbiota. Because B. uniformis can mitigate high-fat-diet-induced metabolic disorders, further study is required to determine the potential applications of AO. PMID:24622338

  3. The Cedell method (cerclage wire and staple) leads to less reoperations than the AO method

    PubMed Central

    Berggren, Sara S; Tiderius, Carl Johan

    2015-01-01

    Background and purpose Fractures of the lateral malleolus often require open reduction and internal fixation (ORIF). Despite uneventful fracture healing, many patients will suffer from long-term detriments after ORIF, such as local tenderness that requires hardware removal. In Sweden, there are 2 major fixation methods, either the AO method (plate and screws) or the Cedell method (cerclage wire and staple). The purpose of this study was to establish whether there is a difference in extraction frequency between the 2 methods. Patients and methods We performed a retrospective comparative study of all isolated fractures through the lateral malleolus that were operated at Skåne University Hospital, Sweden, during the period January 2007 to December 2010. 347 patients fulfilled the inclusion criteria (dislocated Weber B isolated fractures of the lateral malleolus) and were categorized according to fixation method. The numbers of reoperations, with preceding indication, were established from the charts. The median follow-up time was 59 (38–86) months after the primary surgery. Results 22% of the 110 patients treated with the AO method underwent a reoperation, as compared to 8% of the 237 patients treated with the Cedell method (p < 0.001). The median time to extraction was 16 (4–55) months. Interpretation Less implant removal is needed with the Cedell method than with the conventional AO method. This favors the use of the Cedell method in uncomplicated Weber B lateral ankle fractures, provided that other clinical parameters are comparable. PMID:25417836

  4. 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.

  5. PHOTOMETRIC EVOLUTION OF SNe Ib/c 2004ao, 2004gk, AND 2006gi

    SciTech Connect

    Elmhamdi, Abouazza; Kordi, Ayman [Department of Physics and Astronomy, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451 (Saudi Arabia); Tsvetkov, Dmitry [Sternberg Astronomical Institute, University Ave. 13, 119992 Moscow (Russian Federation); Danziger, I. John [INAF, Osservatorio Astronomico di Trieste, Via G.B. Tiepolo 11, 34131 Trieste (Italy)

    2011-04-20

    Photometric observations of three core collapse supernovae (SNe 2004ao, 2004gk, and 2006gi), covering about 200 days of evolution, are presented and analyzed. The photometric behavior of the three objects is consistent with their membership in the envelope-stripped Type Ib/c class. Pseudobolometric light curves are constructed. The corresponding measured e-folding times are found to be faster compared to the {sup 56}Co decay (i.e., 111.3 days), suggesting that a proportion of {gamma}-rays increasing with time have escaped without thermalization, owing to the low-mass nature of the ejecta. SN 2006gi has almost identical post-maximum decline phase luminosities as SN 1999ex and found to be similar to both SNe 1999dn and 1999ex in terms of the quasi-bolometric shape, placing it among the fast decliner Ib objects. SN 2004ao appears to fit within the slow decliner Ib SNe. SNe 2004ao and 2004gk display almost identical luminosities in the [50-100] day time interval, similar to SN 1993J. A preliminary simplified {gamma}-ray deposition model is described and applied to the computed pseudobolometric light curves, allowing one to find a range in the ejecta and {sup 56}Ni masses. The optical and quasi-bolometric light curves and the B - V color evolution of SN 2004gk are found to show a sudden drop after day 150. Correlating this fact to dust formation is premature and requires further observational evidence.

  6. LDEF (Prelaunch), AO135 : Effect of Space Exposure on Pyroelectric Infrared Detectors, Tray E05

    NASA Technical Reports Server (NTRS)

    1984-01-01

    LDEF (Prelaunch), AO135 : Effect of Space Exposure on Pyroelectric Infrared Detectors, Tray E05 The prelaunch photograph was taken in SAEF II at KSC prior to installation of the integrated tray on the LDEF. The Space Exposure on Pyroelectric Infrared Detectors Experiment (AO135) consist of twenty detectors of three different types of materials, lithium-tantalate, strontium-barium-niobate and triglycine-sulfide. The Pyroelectric infrered detector experiment is an integral part of the Active Optical System Component Experiment (S0050) that contains 136 test specimen and is located in a six (6) inch deep LDEF peripheral experiment tray. The experiment tray is divided into six sections, each consisting of a 1/4 inch thick chromic anodized aluminum base plate and a 1/16th inch thick aluminum hat shaped structure for mounting the test specimen. The test specimen are typi- cally placed in fiberglass-epoxy retainer strip assemblies prior to installation on the hat shaped mounting structure. Five of the six sections are covered by a 1/8 inch thick anodized aluminum sun screen with openings that allowed 56 percent transmission over the central region. Two subexperiments, The Optical Materials and UV Detectors Experiment (S0050-01) consist of 15 optical windows, filters and detectors and occupies one of the trays six sub-sections and The Optical Substrates and Coatings Experiment (S0050-02 ) that includes 12 substrates and coatings and a secondary experiment, The Holographic Data Storage Crystal Experiment (AO044) with four crystals, are also mounted in the integrated tray. The experiment structure was assembled with non-magnetic stainless steel fasteners.

  7. Semi-Supervised Learning Techniques in AO Applications: A Novel Approach To Drift Counteraction

    NASA Astrophysics Data System (ADS)

    De Vito, S.; Fattoruso, G.; Pardo, M.; Tortorella, F.; Di Francia, G.

    2011-11-01

    In this work we proposed and tested the use of SSL techniques in the AO domain. The SSL characteristics have been exploited to reduce the need for costly supervised samples and the effects of time dependant drift of state-of-the-art statistical learning approaches. For this purpose, an on-field recorded one year long atmospheric pollution dataset has been used. The semi-supervised approach benefitted from the use of updated unlabeled samples, adapting its knowledge to the slowly changing drift effects. We expect that semi-supervised learning can provide significant advantages to the performance of sensor fusion subsystems in artificial olfaction exhibiting an interesting drift counteraction effect.

  8. Altair at Gemini North: Full Sky Coverage Laser AO Correction at Visible Wavelengths

    NASA Astrophysics Data System (ADS)

    Trujillo, Chadwick; Ball, Jesse; Boccas, Maxime; Cavedoni, Chas; Christou, Julian; Coulson, Dolores; Ebbers, Angelic; Emig, Kimberly; Jorgensen, Inger; Kang, Stacy; Lai, Olivier; Matulonis, Anthony; McDermid, Richard; Miller, Bryan; Neichel, Benoit; Oram, Richard; Rigaut, François; Roth, Kathy; Schneider, Thomas; Stephens, Andy; Trancho, Gelys; Walls, Brian; White, John; Gemini Software Team

    2013-12-01

    We present two recent upgrades to the Gemini North Adaptive Optics(AO) system, Altair. These two upgrades provide 100% sky coverage forlow performance AO suitable for improving the natural seeing byfactors of 2 to 3 from blue visible wavelengths (350 nm) through thenear infrared (2.5 micron wavelengths). The first upgrade, dubbed LGS + P1 "Super Seeing" mode allowscorrection of high order aberrations with an on-axis Laser Guide Star(LGS) while tip/tilt correction is performed with a more distantperipheral wavefront sensor (P1). Most currently operating LGS AOsystems are limited in their sky coverage, primarily due to tip/tiltstar availability. Although P1 provides sub-optimal tip/tiltcorrection due to its distance from the science source, its patrolradius allows operation in LGS + P1 mode anywhere in the sky fromdeclinations of +70 degrees to -30 degrees. This mode was offered forscience use at Gemini North in 2013A. We will present typicalperformance and use from its first semester in science operation,where we expect to improve image quality by a factor 2 to 3 overseeing limited images. The second upgrade is the commissioning of the AO system to correct atvisible wavelengths, which is expected to be completed in late 2013.In this mode, Altair will feed the Gemini Multi-Object Spectrograph(GMOS), which is an optical imager as well as a long-slit, multi-slitand integral field unit spectrograph. We intend to replace thecurrent Altair science dichroic with a sodium notch filter, passingonly the 589nm wavelength light from the LGS to the AO system. Therest of the spectrum from 400 nm to the GMOS red cutoff at 1.1 micronsis intended as science capable light. Tip/tilt correction will beperformed close to the science target with the GMOS on-instrumentwavefront sensor or with P1 as in the P1+LGS mode discussed above. Weexpect an image quality improvement of roughly a factor 2 in this modeover seeing limited observations. Since exposure time to reach a given signal-to-noise ratio scalesroughly as the square of the image quality, these two upgradesrepresent a substantial efficiency improvement which is available tonearly all targets normally observed at Gemini North.

  9. Optimization of an AO Q-switched solid-state Raman laser

    NASA Astrophysics Data System (ADS)

    Zhu, Feihu; Gong, Ke; Huo, Yujing

    2012-04-01

    An extension of the rate equation models for solid-state Raman laser is proposed and investigated with accounting for the dynamics of an acousto-optically (AO) Q-switch modulator and the effects of thermal lens provided by the pump beam. The improved model is aimed at outlining optimization strategies for wonderful laser performance with short pulse width and high peak power. A comparison between traditional intra-cavity and new couple-cavity configurations is made. The simulation results indicate that it is possible to realize an efficient sub-nanosecond coupled-cavity Raman laser by optimizing several important parameters.

  10. VSOP monitoring of the compact BL Lac object AO 0235+164

    E-print Network

    Frey, S; Gabuzda, D C; Salter, C J; Altschüler, D R; Perillat, P; Aller, M F; Aller, H D; Hirabayashi, H; Davis, M M

    2005-01-01

    In 1999, the highly compact and variable BL Lac object AO 0235+164 was identified as the highest brightness temperature active galactic nucleus observed with the VLBI Space Observatory Programme (VSOP), with T_B > 5.8 x 10^{13} K. The sub-milliarcsecond radio structure of this source has been studied with dual-frequency (1.6 and 5 GHz), polarization-sensitive VSOP observations during 2001 and 2002. Here we present the results of this monitoring campaign. At the time of these observations, the source was weakly polarized and characterized by a radio core that is clearly resolved on space-ground baselines.

  11. VSOP monitoring of the compact BL Lac object AO 0235+164

    E-print Network

    S. Frey; L. I. Gurvits; D. C. Gabuzda; C. J. Salter; D. R. Altschuler; P. Perillat; M. F. Aller; H. D. Aller; H. Hirabayashi; M. M. Davis

    2005-09-19

    In 1999, the highly compact and variable BL Lac object AO 0235+164 was identified as the highest brightness temperature active galactic nucleus observed with the VLBI Space Observatory Programme (VSOP), with T_B > 5.8 x 10^{13} K. The sub-milliarcsecond radio structure of this source has been studied with dual-frequency (1.6 and 5 GHz), polarization-sensitive VSOP observations during 2001 and 2002. Here we present the results of this monitoring campaign. At the time of these observations, the source was weakly polarized and characterized by a radio core that is clearly resolved on space-ground baselines.

  12. Rayleigh guide star AO demonstrator for the 4.2m William Herschel Telescope

    NASA Astrophysics Data System (ADS)

    Clark, Paul; Bissonauth, Nirmal; O'Byrne, John W.; Dunlop, Colin N.; Gregory, Thomas; Morris, Timothy J.; Myers, Richard M.; Saunter, Christopher D.; Wilson, Richard W.

    2003-02-01

    An experimental Adaptive Optics system utilizing a low-altitude Rayleigh Laser Guide Star is presented. The current status of the project is described together with plans for future work, with the ultimate goal of providing demonstration Rayleigh LGS AO science on the 4.2m William Herschel Telescope. The implementation of the demonstration system is described in detail as are the technical challenges encountered during the development of the current shared-launch based system. Other papers in this conference describe a proposal for a facility class LGS system for the WHT and the performance of the observatory's NAOMI adaptive optics system.

  13. 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.

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

    E-print Network

    C. E. Senkbeil; S. P. Ellingsen; J. E. J. Lovell; J. -P. Macquart; G. Cimò; D. L. Jauncey

    2007-12-07

    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.

  15. Behavior of molten Pb and 83 A/O Pb-17 A/O Li when impacted by a vertical column of water

    SciTech Connect

    Nelson, L.S.; Farahani, A.; Krueger, J.D.; Corradini, M.L. [Univ. of Wisconsin, Madison, WI (United States)

    1997-12-01

    Because water-cooled molten Pb-17 a/o Li eutectic is being considered as a breeder/blanket for nuclear fusion, we must understand the interactions that occur if this alloy inadvertently contacts liquid water. We have, therefore, compared the behavior of 120 g of the molten alloy with that of 140 g of molten lead, both at 600{degrees}C when impacted with a vertical 2.4 m-tall column of water at 25{degrees}C or 60{degrees}C. (Temperatures and weights are nominal.) The intent of this study was to determine differences between the fuel-coolant interaction (FCI) behaviors of a chemically reactive melt, the PbLi alloy, and of an inert material, Pb. H{sub 2} and aqueous solutions of LiOH, both potentially hazardous, were generated with the alloy, but not with the Pb. Although significant chemical reaction occurred with the alloy, no augmentation of the energetics was measured nor was there any indication of runaway metal ignition. The observations can be interpreted as the typical FCI phenomena seen in shock tube geometry, i.e., hydro-dynamic forced mixing of melt by water column impact driving thermal interaction at the melt-water interface. Chemical reactions seem to follow this melt-water contact, moderating, not augmenting, the energetics. 32 refs., 4 figs., 1 tab.

  16. Is it time to revisit the AO classification of fractures of the distal radius? Inter- and intra-observer reliability of the AO classification.

    PubMed

    Plant, C E; Hickson, C; Hedley, H; Parsons, N R; Costa, M L

    2015-06-01

    We conducted an observational radiographic study to determine the inter- and intra-observer reliability of the AO classification of fractures of the distal radius. Plain posteroanterior and lateral radiographs of 456 patients with an acute fracture of the distal radius were classified by a consultant orthopaedic hand specialist and two specialist trainees, and the k coefficient for the inter- and intra-observer reliability of the type, group and subgroup classification was calculated. Only the type of fracture (A, B or C) was found to provide substantial intra-observer reliability (k type 0.65). The inclusion of 'group' and 'subgroup' into the classification reduced the inter-observer reliability to fair (kgroup 0.29, ksubgroup = 0.28) and the intra-observer reliability to moderate (kgroup 0.53, ksubgroup 0.49). Disagreement was found to arise between specific subgroups, which may be amenable to clarification. Cite this article: Bone Joint J 2015; 97-B:818-23. PMID:26033063

  17. Integrac~ao do Servico de Diretorio LDAP com o Servico de Nomes CORBA Gustavo Scalco Isquierdo

    E-print Network

    Reverbel, Francisco

    Integrac¸~ao do Servic¸o de Diret´orio LDAP com o Servic¸o de Nomes CORBA Gustavo Scalco Isquierdo systems, middleware Resumo Este artigo apresenta uma abordagem para a integrac¸~ao do servic¸o de diret armazena num diret´orio LDAP as associac¸~oes entre nomes e refer^encias para objetos. As associac

  18. PR E-DESPACHO DE SISTEMAS DE ENERGIA ELETRICA VIA RELAXAC ~AO LAGRANGEANA E M ETODOS DE PONTOS INTERIORES

    E-print Network

    Oliveira, Aurélio R. L.

    . Experimentos num´ericos, para diversos cen´arios com o sistema teste IEEE30 s~ao apresentados e comparados com pot^encia ´otimo, Relaxac¸~ao Lagrangeana, M´etodo de pontos interiores, Fluxo em redes, Pr pot^encia, sujeito a restric¸~oes lineares representando o fluxo de pot^encia ativo e as metas de

  19. [Study on the degradation of AO7 by UV/K2S2O8, system: kinetics and pathways].

    PubMed

    Chen, Xiao-yang; Wang, Wei-ping; Zhu, Feng-xiang; Hong, Chun-lai; Xue, Zhi-yong

    2010-07-01

    The UV photolysis of S2O8(2-) is a novel advanced oxidation technologies (AOTs), which leads to the formation of strong oxidizing radicals, sulfate radicals (SO4(*-)). The effect of oxidant K2S2O8 concentration, the initial pH of solution and various inorganic anions (H2PO4-, HCO3-, NO3- and Cl-) were investigated using AO7, a kind of azo dye, as a model pollutant. The degradation kinetics of AO7 followed pseudo first-order kinetics and reaction rates related to PMS concentrations. When the initial concentration of AO7 was 0.14 mmol/L, the optimal molar ratio of oxidant K2S2O8 to pollutants AO7 was 20. The effect of initial pH had great effect on the AO7 degradation rate during UV/K2S2O8 system. Increasing system pH results in the formation of *OH from SO4(*-). The effects of four inorganic anions (H2PO4-, HCO3-, NO3- and Cl-) all had some negative effect on the degradation of AO7. Based on the results of GC/MS, three main intermediates (2-naphthalenol, coumarin and 1,2-benzenedicarboxylic acid) were identified, thus the degradation pathway for SO4(*-) induced by UV/K2S2O8 was proposed accordingly. PMID:20825022

  20. 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.

  1. Adaptive optics stochastic optical reconstruction microscopy (AO-STORM) using a genetic algorithm.

    PubMed

    Tehrani, Kayvan F; Xu, Jianquan; Zhang, Yiwen; Shen, Ping; Kner, Peter

    2015-05-18

    The resolution of Single Molecule Localization Microscopy (SML) is dependent on the width of the Point Spread Function (PSF) and the number of photons collected. However, biological samples tend to degrade the shape of the PSF due to the heterogeneity of the index of refraction. In addition, there are aberrations caused by imperfections in the optical components and alignment, and the refractive index mismatch between the coverslip and the sample, all of which directly reduce the accuracy of SML. Adaptive Optics (AO) can play a critical role in compensating for aberrations in order to increase the resolution. However the stochastic nature of single molecule emission presents a challenge for wavefront optimization because the large fluctuations in photon emission do not permit many traditional optimization techniques to be used. Here we present an approach that optimizes the wavefront during SML acquisition by combining an intensity independent merit function with a Genetic algorithm (GA) to optimize the PSF despite the fluctuating intensity. We demonstrate the use of AO with GA in tissue culture cells and through ~50µm of tissue in the Drosophila Central Nervous System (CNS) to achieve a 4-fold increase in the localization precision. PMID:26074617

  2. Facility class Rayleigh beacon AO system for the 4.2m William Herschel telescope

    NASA Astrophysics Data System (ADS)

    Rutten, René G.; Clark, Paul; Myers, Richard M.; Wilson, Richard W.; Bingham, Richard G.; Emsellem, Eric; Gregory, Thomas; Humphreys, Ronald A.; Knapen, Johan; Moretto, Gilberto; Morris, Simon L.; Talbot, Gordon

    2003-02-01

    A rationale is presented for the use of a relatively low-altitude (15km) Rayleigh Laser Guide Star to provide partial adaptive optics correction across a large fraction of the sky on the 4.2m William Herschel Telescope. The scientific motivation in relation to the available instrumentation suite is discussed and supported by model performance calculations, based on observed atmospheric turbulence distributions at the site. The proposed implementation takes the form of a laser system, beam diagnostics, tip-tilt mirror and beacon launch telescope, together with a range-gated wavefront sensor and processing system. It is designed to operate in conjunction with the telescope"s existing facility-class natural guide star AO system, NAOMI. Aspects of the proposed implementation are described as well as the technical features related to the system model and the error budget. In a separate paper the NAOMI AO system itself is presented. Other papers describe a demonstrator system and preliminary Rayleigh beacon wavefront sensing measurements at the site.

  3. Io volcanic activity captured in full motion with the Keck AO system

    NASA Astrophysics Data System (ADS)

    Marchis, F.; Le Mignant, D.; de Pater, I.; Prange, R.; Fusco, T.; Chaffee, F.; Keck Science Team

    2003-04-01

    Io was observed in December 2001 with the NIRC2 camera, mounted on the Keck II Adaptive Optics (AO) system. Fourteen Observations were performed on ten days in three broadband infrared filters K (2.2 ?m), L' (3.8 ?m) and Ms (4.7 ?m). The angular resolution achieved is 0.05" in K-band, i.e. 120-140 km on Io. Images were processed using MISTRAL to enhance their sharpness. The 14 images provide a complete survey of Io's surface during one full rotation. 26 hot spots were detected in Lp-band and roughly twice as many in Ms-band. Two active centers (Pele and Malik) were clearly seen in K-band indicating a higher temperature of lava. The L/M temperature (from 300 to 1200 K) and the surface area (from 5 to 90000 km^2) on each hot spot give indications about the nature of the volcanic area (fire fountain, lava lake or lava flow field). Comparison with previous Galileo/NIMS data of the most important active centers (Loki, Pele, Amirani, Surt...) will be shown. We will conclude describing how the future use of AO technique will help to monitor and understand this extraterrestrial and exotic volcanism.

  4. ShaneAO: wide science spectrum adaptive optics system for the Lick Observatory

    E-print Network

    Gavel, Donald; Dillon, Daren; Norton, Andrew; Ratliff, Chris; Cabak, Jerry; Phillips, Andrew; Rockosi, Connie; McGurk, Rosalie; Srinath, Srikar; Peck, Michael; Deich, William; Lanclos, Kyle; Gates, John; Saylor, Michael; Ward, Jim; Pfister, Terry

    2014-01-01

    A new high-order adaptive optics system is now being commissioned at the Lick Observatory Shane 3-meter telescope in California. This system uses a high return efficiency sodium beacon and a combination of low and high-order deformable mirrors to achieve diffraction-limited imaging over a wide spectrum of infrared science wavelengths covering 0.8 to 2.2 microns. We present the design performance goals and the first on-sky test results. We discuss several innovations that make this system a pathfinder for next generation AO systems. These include a unique woofer-tweeter control that provides full dynamic range correction from tip/tilt to 16 cycles, variable pupil sampling wavefront sensor, new enhanced silver coatings developed at UC Observatories that improve science and LGS throughput, and tight mechanical rigidity that enables a multi-hour diffraction- limited exposure in LGS mode for faint object spectroscopy science.

  5. Toward a large lightweight mirror for AO: development of a 1m Ni coated CFRP mirror

    NASA Astrophysics Data System (ADS)

    Thompson, S. J.; Doel, A. P.; Brooks, D.; Strangwood, M.

    2008-07-01

    We present our recent developments towards the construction of a large, thin, single-piece mirror for adaptive optics (AO). Our current research program aims to have completed fabrication and testing of a 1m diameter, nickel coated carbon-fibre reinforced cyanate ester resin mirror by the last quarter of 2009. This composite mirror material is being developed to provide a lightweight and robust alternative to thin glass shell mirrors, with the challenge of future large deformable mirrors such as the 2.5m M4 on the E-ELT in mind. A detailed analysis of the material properties of test mirror samples is being performed at the University of Birmingham (UK), the first results of which are discussed and presented here. We discuss the project progress achieved so far, including fabrication of the 1m flat moulds for the replication process, manufacturing and testing methods for 20 cm diameter sample mirrors and system simulations.

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

    SciTech Connect

    Deneva, J. S. [Arecibo Observatory, HC3 Box 53995, Arecibo, PR 00612 (United States); Stovall, K.; Martinez, J. G.; Jenet, F. [Center for Advanced Radio Astronomy, Department of Physics and Astronomy, University of Texas at Brownsville, Brownsville, TX 78520 (United States); McLaughlin, M. A.; Bates, S. D.; Bagchi, M. [Department of Physics, West Virginia University, 111 White Hall, Morgantown, WV 26506 (United States); Freire, P. C. C. [Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, D-53121 Bonn (Germany)

    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.

  7. Aspergillus oryzae AoSO Is a Novel Component of Stress Granules upon Heat Stress in Filamentous Fungi

    PubMed Central

    Huang, Hsiang-Ting; Maruyama, Jun-ichi; Kitamoto, Katsuhiko

    2013-01-01

    Stress granules are a type of cytoplasmic messenger ribonucleoprotein (mRNP) granule formed in response to the inhibition of translation initiation, which typically occurs when cells are exposed to stress. Stress granules are conserved in eukaryotes; however, in filamentous fungi, including Aspergillus oryzae, stress granules have not yet been defined. For this reason, here we investigated the formation and localization of stress granules in A. oryzae cells exposed to various stresses using an EGFP fusion protein of AoPab1, a homolog of Saccharomyces cerevisiae Pab1p, as a stress granule marker. Localization analysis showed that AoPab1 was evenly distributed throughout the cytoplasm under normal growth conditions, and accumulated as cytoplasmic foci mainly at the hyphal tip in response to stress. AoSO, a homolog of Neurospora crassa SO, which is necessary for hyphal fusion, colocalized with stress granules in cells exposed to heat stress. The formation of cytoplasmic foci of AoSO was blocked by treatment with cycloheximide, a known inhibitor of stress granule formation. Deletion of the Aoso gene had effects on the formation and localization of stress granules in response to heat stress. Our results suggest that AoSO is a novel component of stress granules specific to filamentous fungi. The authors would specially like to thank Hiroyuki Nakano and Kei Saeki for generously providing experimental and insightful opinions. PMID:23991062

  8. Wide Tertiary Companions to Nearby Spectroscopic Binaries: A Close Look with Gemini-North AO

    NASA Astrophysics Data System (ADS)

    Allen, P. R.; Close, L.

    2011-12-01

    We report on the preliminary findings of a multi-epoch, common proper motion (CPM) search for tertiary companions to known, nearby spectroscopic binary systems. Simulations of the star forming environment indicate that, in order to produce the very small separations of such systems, a third member can carry away angular momentum, tightening the binary. This third member typically has a low-mass and remains bound to the system. We use NIRI-Altair AO imaging on Gemini-North to search for close tertiary companions to a sample of 91 spectroscopic binaries. We collect the data in two narrow-band filters separated by approximately one year. The two filters are centered just outside of the 1.6 ?m methane feature (CH4short) and just inside it (CH4long). This allows for two forms of candidate identification: 1) CPM and 2) methane dropout if the object is a T dwarf. At this time, we have obtained and analyzed 60 multi-epoch fields. We confirm a previously known CPM companion and identify three sub-stellar candidates and two M dwarf candidates.

  9. Estimating the reduction of vibrations in MACAO and ALTAIR AO systems using H2 control synthesis

    NASA Astrophysics Data System (ADS)

    Guesalaga, Andrés; Haguenauer, Pierre; Gonte, Frederic; O'Neal, Jared; Neichel, Benoit; Lai, Olivier Lai; Trujillo, Chad; Guzman, Dani

    2013-12-01

    Vibrations and external disturbances of various origins (e.g. structural, wind, axis control) have been shown to degrade the image quality at the instrument focus of the telescopes. Furthermore, the next generation of extremely large telescopes (ELTs) and their associated adaptive optics (AO) systems will reach new levels of high angular resolution, thus reducing vibrations represents becomes highly desirable to ensure that the scientific instruments will take full advantage of this unprecedented resolution. We present a method that aims to mitigate the effect of vibrations at Paranal's MACAO and Gemini North's ALTAIR instruments. A frequency-based controller, based on the H2 synthesis technique [1,2], is used to maximize the performance of the tip and tilt closed-loop systems. The pseudo open-loop slopes are reconstructed from on-sky data and then used to find the controller that minimizes the variance of the tip-tilt residuals in an off-line simulation of the closed-loop system.

  10. Ultraviolet spectral behavior of AO Psc and V1223 Sgr from the HST and IUE satellites

    NASA Astrophysics Data System (ADS)

    Sanad, M. R.

    2015-03-01

    We present a spectroscopic study of two intermediate polar systems, AO Psc and V1223 Sgr observed with the Hubble Space Telescope Space Telescope Imaging Spectrograph (HST STIS) and International Ultraviolet Explorer (IUE) during the period 1980-2000. The reddening of two systems is determined from the 2200 Å feature. The ultraviolet emission lines are originating in the accretion disk as a result of existing an extra component of emission in the EUV/soft X-ray range with luminosity comparable to the accretion luminosity which reprocessed to produce the observed ultraviolet line strengths. Different spectra for both systems showing the variations in line fluxes at different orbital phases are presented. We concentrated on calculating the line fluxes of C IV 1550 Å & He II 1640 Å emission lines. From HST and IUE data, we derived an accretion luminosities and an accretion rates for two systems. Our results show that there are variations in line fluxes, accretion luminosities and accretion rates with time for two systems. These variations are attributed to the variations of both density and temperature as a result of a changing rate of mass transfer from the secondary star to the white dwarf. These results from the IUE and HST observations are consistent with the models of Ko et al. (Astrophys. J., 457:363K, 1996).

  11. Getting Lucky with Adaptive Optics: Fast AO Image Selection in the Visible with a Large Telescope

    E-print Network

    N. M. Law; C. D. Mackay; R. G. Dekany; M. Ireland; J. P. Lloyd; A. M. Moore; J. G. Robertson; P. Tuthill; H. Woodruff

    2008-05-13

    We describe the results from a new instrument which combines Lucky Imaging and Adaptive Optics to give the first routine direct diffraction-limited imaging in the visible on a 5m telescope. With fast image selection behind the Palomar AO system we obtained Strehl ratios of 5-20% at 700 nm in a typical range of seeing conditions, with a median Strehl of approximately 12% when 10% of the input frames are selected. At wavelengths around 700 nm the system gave diffraction-limited 35 milliarcsecond FWHMs. At 950 nm the output Strehl ratio was as high as 36% and at 500 nm the FWHM resolution was as small as 42 milliarcseconds, with a low Strehl ratio but resolution improved by factor of ~20 compared to the prevailing seeing. To obtain wider fields we also used multiple Lucky-Imaging guide stars in a configuration similar to a ground layer adaptive optics system. With eight guide stars but very undersampled data we obtained 300 milliarcsecond resolution across a 30X30 arcsec field of view in i' band.

  12. 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.

  13. Pol ticas de Hand-o com Balanceamento de Carga para Computa c~ao A. Santiago, A. Goldman

    E-print Network

    Goldman, Alfredo

    #19;adio atrav#19;es de Esta#24;c~oes R#19;adio Bases (ERBs). As quais de- vem estar espacialmente sofrem com o limite de espectro de frequ^encias dispon#19;#16;vel para canais de r#19;adio, este simultaneamente. Nestes sistemas os canais de r#19;adio s~ao os recursos primordiais para estabelecer a conex

  14. Optical and radio variability of the BL Lacertae object AO 0235+16: A possible 5-6 year periodicity

    Microsoft Academic Search

    C. M. Raiteri; M. Villata; H. D. Aller; M. F. Aller; J. Heidt; O. M. Kurtanidze; L. Lanteri; M. Maesano; E. Massaro; F. Montagni; R. Nesci; K. Nilsson; M. G. Nikolashvili; P. Nurmi; L. Ostorero; T. Pursimo; R. Rekola; A. Sillanpää; L. O. Takalo; H. Teräsranta; G. Tosti; T. J. Balonek; M. Feldt; A. Heines; C. Heisler; J. Hu; M. Kidger; J. R. Mattox; E. J. McGrath; A. Pati; R. Robb; A. C. Sadun; P. Shastri; S. J. Wagner; J. Wei; X. Wu

    2001-01-01

    The BL Lacertae object AO 0235+16 is well known for its extreme optical and radio variability. New optical and radio data have been collected in the last four years by a wide international collaboration, which confirm the intense activity of this source: on the long term, overall variations of 5mag in the R band and up to a factor 18

  15. JOURNAL DE PHYSIQUEIV Colloque C3, supplkmentau Journal de Physique 11, Volume 3,ao6t 1993

    E-print Network

    Boyer, Edmond

    in thin film technology. Remarkable improvements have been obtained in the cell performance of amorphous silicon solar cells employing a-SiC:H as a wide-gap window layer (1). Recently, Oguri and Arai (2JOURNAL DE PHYSIQUEIV Colloque C3, supplkmentau Journal de Physique 11, Volume 3,ao6t 1993 Physical

  16. Distributed Nesterov-like Gradient Algorithms Dusan Jakovetic, Jose M. F. Moura, and Jo~ao Xavier

    E-print Network

    Instituto de Sistemas e Robotica

    Distributed Nesterov-like Gradient Algorithms Dusan Jakoveti´c, Jos´e M. F. Moura, and Jo~ao Xavier/2009; and by ISR/IST plurianual funding (POSC program, FEDER). The work of J. M. F. Moura is partially supported. F. Moura is with the Department of Electrical and Com- puter Engineering, Carnegie Mellon University

  17. Na+ transport by the A1AO-ATP synthase purified from Thermococcus onnurineus and reconstituted into liposomes.

    PubMed

    Mayer, Florian; Lim, Jae Kyu; Langer, Julian D; Kang, Sung Gyun; Müller, Volker

    2015-03-13

    The ATP synthase of many archaea has the conserved sodium ion binding motif in its rotor subunit, implying that these A1AO-ATP synthases use Na(+) as coupling ion. However, this has never been experimentally verified with a purified system. To experimentally address the nature of the coupling ion, we have purified the A1AO-ATP synthase from T. onnurineus. It contains nine subunits that are functionally coupled. The enzyme hydrolyzed ATP, CTP, GTP, UTP, and ITP with nearly identical activities of around 40 units/mg of protein and was active over a wide pH range with maximal activity at pH 7. Noteworthy was the temperature profile. ATP hydrolysis was maximal at 80 °C and still retained an activity of 2.5 units/mg of protein at 45 °C. The high activity of the enzyme at 45 °C opened, for the first time, a way to directly measure ion transport in an A1AO-ATP synthase. Therefore, the enzyme was reconstituted into liposomes generated from Escherichia coli lipids. These proteoliposomes were still active at 45 °C and coupled ATP hydrolysis to primary and electrogenic Na(+) transport. This is the first proof of Na(+) transport by an A1AO-ATP synthase and these findings are discussed in light of the distribution of the sodium ion binding motif in archaea and the role of Na(+) in the bioenergetics of archaea. PMID:25593316

  18. Curso 6 -Introduo ao Uso do SPRING (Training Course in SPRING) Coordenadores: Srgio Rosim e Jussara de Oliveira Ortiz (INPE)

    E-print Network

    Curso 6 - Introdução ao Uso do SPRING (Training Course in SPRING) Coordenadores: Sérgio Rosim e: Português Vagas: 20 Natureza: Teórico/Prático (Dois alunos por computador) Resumo: O objetivo deste curso é no sistema. Para tanto, o curso será composto de apresentações teóricas e exercícios. Na parte teórica serão

  19. Lmite de prazas para o curso 2014-2015 ACCESO AO CUARTO CURSO DE GRAO OU A OUTROS

    E-print Network

    Fraguela, Basilio B.

    Límite de prazas para o curso 2014-2015 ACCESO AO CUARTO CURSO DE GRAO OU A OUTROS CURSOS DE TITULADOS UDC 2014-2015 2013-2014 Primeiro curso do grao en Empresariais 0 45 Cuarto curso do grao en Enfermaría (A Coruña) 10 10 Cuarto curso do grao en Enfermaría (Ferrol) 10 10 Cuarto curso do grao en

  20. Antnio Cruz Serra foi o nico candidato ao cargo de reitor da nova Universidade de Lisboa Reitor de megauniversidade

    E-print Network

    Instituto de Sistemas e Robotica

    António Cruz Serra foi o único candidato ao cargo de reitor da nova Universidade de Lisboa Reitor Técnica para a liderança da nova instituição e na bagagem traz a aposta na investigação, como forma de nova megaestrutura, que vai ter no seu conjunto 48 mil alunos em todos os graus de ensino. Marcelo

  1. Liquid freshwater transport and Polar Surface Water characteristics in the East Greenland Current during the AO02 Oden expedition

    Microsoft Academic Search

    Johan Nilsson; Göran Björk; Bert Rudels; Peter Winsor; Daniel Torres

    2008-01-01

    Dynamical features of the East Greenland Current (EGC) are synthesized from a survey conducted by the Swedish icebreaker Oden during the International Arctic Ocean – 02 expedition (AO-02) in May 2002 with emphasis on the liquid freshwater transport and Polar Surface Water. The data include hydrography and lowered acoustic doppler current profiler (LADCP) velocities in eight transects along the EGC,

  2. 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

  3. Reverse Engineering MAC Ao Tang, Jang-Won Lee, Jianwei Huang, Mung Chiang, and A. Robert Calderbank

    E-print Network

    Low, Steven H.

    Reverse Engineering MAC Ao Tang, Jang-Won Lee, Jianwei Huang, Mung Chiang, and A. Robert Calderbank Abstract-- This paper reverse-engineers backoff-based random-access MAC protocols in ad-hoc networks. We engineering TCP and BGP, this paper completes the recent efforts in reverse engineering layers 2-4 protocols

  4. Marching Cubes without Skinny Triangles Carlos A. Dietrich, Carlos E. Scheidegger, Jo~ao L. D. Comba, Luciana P. Nedel

    E-print Network

    Silva, Claudio T.

    Marching Cubes without Skinny Triangles Carlos A. Dietrich, Carlos E. Scheidegger, Jo~ao L. D triangles can lead to bad performance and numerical instabilities. Marching Cubes is the standard iso generates some bad triangles. Here we show how simple changes to Marching Cubes can lead to a drastically

  5. Fig. 1: Artist's vision of the E-ELT Fig. 2: Possible layout of SIMPLE coupled to an AO system

    E-print Network

    Fig. 1: Artist's vision of the E-ELT Fig. 2: Possible layout of SIMPLE coupled to an AO system Fig. 3: An alternative design combined with an optical spectrometer Fig. 4: Artist impression of an Earth-mass planet orbiting and M-dwarf in the habitable zone Fig. 5: The true atmospheric absorption (black

  6. Expression of Pisum sativum PsAO3 gene, which encodes an aldehyde oxidase utilizing abscisic aldehyde, is induced under progressively but not rapidly imposed drought stress.

    PubMed

    Zdunek-Zastocka, Edyta; Sobczak, Miros?aw

    2013-10-01

    Aldehyde oxidase (AO; EC 1.2.3.1) catalyzes the final step of abscisic acid (ABA) biosynthesis, which is the oxidation of abscisic aldehyde (ABAld) to ABA. Gene expression analyses indicate that the stress-induced Pisum sativum PsAO? isoform, which effectively uses ABAld as a substrate, is encoded by the PsAO3 gene. PsAO3 was heterologously expressed in Pichia pastoris and the recombinant PsAO3 protein revealed substrate preferences highly similar to the native PsAO? protein present in the pea leaves and roots. Both proteins prefer indole-3-aldehyde and naphthaldehyde as substrates, although high activities against abscisic aldehyde and citral were also observed. The Km values of PsAO3 for naphthaldehyde and abscisic aldehyde (4.6 and 5.1 ?M, respectively) were the lowest among the substrates tested. PsAO3 activity was almost completely inhibited by potassium cyanide, diphenyleneiodonium, and methanol. Rapidly imposed drought stress did not increase the level of PsAO3 mRNA or activity of any AO isoform, although an enhanced ABA accumulation and induction of PsNCED2 and -3 (9-cis-epoxycarotenoid dioxygenase; EC 1.13.11.51) expression, both in the pea roots and leaves, was observed. During a progressively induced drought, the level of PsAO3 transcript and PsAO? activity increased significantly in the roots and leaves, whereas ABA accumulation occurred only in the leaves where it was accompanied by induction of the PsNCED3 expression. Therefore, we suppose that next to NCED, also AO (mainly PsAO?) might be involved in regulation of the drought-induced ABA synthesis. However, while the "constitutive activity" of PsAO? is sufficient for the fast generation of ABA under rapid drought stress, the enhanced PsAO? activity is required for the progressive and long-term ABA accumulation in the leaves under progressive drought stress. PMID:23876699

  7. 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.

  8. 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.

  9. 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.

  10. Ground-based direct imaging of extra-solar planets supported by AO

    NASA Astrophysics Data System (ADS)

    Masciadri, Elena; Geissler, Kerstin; Kellner, Stephan; Brandner, Wolfgang; Henning, Thomas; Mundt, Reinhard; Close, Laird; Biller, Beth; Raga, Alejandro

    The detection of extra-solar planets made by direct imaging is an extremely challenging goal for astronomers due to the possibility to access the physical properties of planets and not only their existence. Using 8 m class telescopes joint with dedicated techniques (such as Simultaneous Differential Imaging aiming to suppress the speckle noise) it is possible, at present, to attain detection limit of 9-11 mag at 0.5 arcsec i.e. to access 3-10 MJ planets orbiting around young (100-200 Myr) nearby and late type stars. Searches for extra-solar planets carried out with the present technology are quite fundamental and critical not only for discovery of planets but also because it permits us to put constraints on theories of planets formation and migration. Besides, our understandings of the performances of sophisticated techniques such as the SDI is fundamental to plan new observational strategies, new generation instruments and telescopes. Speckles noise is, indeed, the main source of noise for observations in the NIR and visible and our ability in suppressing it is not so easily scaled at different parameters space. In this contribution I will present the main results that we obtained in on-going searches for planets carried out with NACO and NACO/SDI in the last years. A particular attention will be dedicated in comparing different observational strategies and in the employment of image processing techniques for recognizing, in an automatic way, planet features in deep images obtained with ground-based telescopes and AO facilities.

  11. Passaremos agora ao estudo de sistemas com mais de um grau de liberdade. Existe a um salto qualitativo muito grande devido ao fato de que, em geral, sistemas com mais de um grau de liberdade so

    E-print Network

    de Aguiar, Marcus A. M.

    Passaremos agora ao estudo de sistemas com mais de um grau de liberdade. Existe aí um salto;5 Quantização Semiclássica de Sistemas Integráveis 56 p q I == == : Determinamos agora a amplitude da (( )) (( )) I q t c I q i q I t , det exp , , == 2 1 2 Agora falta apenas superpor ondas do tipo acima

  12. 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 Scott Hamilton, da con- #12;sultora de aviação americana Leeham. Ao contrário do que podem sugerir os

  13. Holcombe, AO (2009). The Binding Problem. . In E. Bruce. Goldstein (Ed.), The Sage Encyclopedia of Perception. Sage. PRE-PRINT, NOT THE PUBLISHED VERSION

    E-print Network

    Holcombe, Alex O.

    2009-01-01

    Holcombe, AO (2009). The Binding Problem. . In E. Bruce. Goldstein (Ed.), The Sage Encyclopedia of Perception. Sage. PRE-PRINT, NOT THE PUBLISHED VERSION 1 The Binding Problem Objects have different features three elements. #12;Holcombe, AO (2009). The Binding Problem. . In E. Bruce. Goldstein (Ed.), The Sage

  14. Period Changes of AO Camelopardalis and AM Leonis and Their Implications for the Presence of Tertiary Components and the Evolutionary States of the Two Overcontact Binary Systems

    Microsoft Academic Search

    Sheng-Bang Qian; Jiajia He; Fuyuan Xiang; Xiyang Ding; Soonthornthum Boonrucksar

    2005-01-01

    AO Cam and AM Leo are two short-period overcontact binary systems whose physical properties are nearly the same. In the present paper, three CCD times of minimum light for AO Cam and two photoelectric eclipse times for AM Leo are presented. Combining the new determined eclipse times with others compiled from the literature, the behavior of their O-C variations were

  15. The potential of GPI extreme AO system to image and characterize exoplanets and asteroids

    NASA Astrophysics Data System (ADS)

    Marchis, Franck; Vega, David

    2014-11-01

    The Gemini Planet Imager (GPI) is a next-generation adaptive optics coronagraph designed for direct imaging and spectroscopy of extrasolar planets, polarimetry of circumstellar disks and solar system planets. It is the first such facility-class instrument deployed on a 8-m telescope, designed to achieve contrast levels of up to 10^7.On the first commissioning observations (2013B), we achieved an estimated H band Strehl ratio of 0.89 and a 5-sigma contrast of 10^6 at 0.75 arcseconds. Observations of Beta Pictoris (Macintosh et al. PNAS 2014) clearly detect the planet, Beta Pictoris b, in a single 60-second exposure with minimal post-processing. These observations were taken covering the H-band (1.65 ?m). A H-band spectrum of Beta Pic b presented in Chilcote et al. (2014) with a resolving power of ~45 and demonstrates the distinctive triangular shape of a cool substellar object with low surface gravity leading to an effective temperature of 1650+/-50 K and a surface gravity of log(g) = 4.0 +/- 0.25 (cgs units).We will also present the analysis of observations of (2) Pallas observed in direct imaging (without coronagraph) on March 22 2014 in Y, J, H, and K1 filters (from 0.95 to 2.19 ?m) spectroscopically with a resolution varying from 34 to 70. The 540-km asteroid is well resolved and irregular. An ellipse of 540±9 mas and 470±9 mas fits its silhouette. The surface of the asteroid is mostly featureless but small differences of colors is currently being analyzed. No moons with a diameter larger than 2 km and at least 480 km from Pallas were detected on these observations.These results show the power of a dedicated extreme AO with high-contrast imager, low resolution spectrograph and polarizer. A 600-star survey of young nearby stars led by B. Macintosh will begin in 2014B to produce a sample of directly imaged planets that spans a broad range of temperatures, ages, and masses and probes the range of semi-major-axes and stellar ages inaccessible to Doppler and transit surveys. Similarly a program to map ~30-40 large main-belt asteroids and search for companions around them will be initiated in 2015A. This work is funded by NASA NNX14AJ80G

  16. Laser guidestar uplink correction using a MEMS deformable mirror: on-sky test results and implications for future AO systems

    NASA Astrophysics Data System (ADS)

    Norton, Andrew P.; Gavel, Donald T.; Helmbrecht, Michael; Kempf, Carl; Gates, Elinor; Chloros, Kostas; Redel, Donnie; Kupke, Renate; Dillon, Daren

    2014-07-01

    By inserting a MEMS deformable mirror-based adaptive optics system into the beam transfer optics of the Shane 3-meter telescope at Mt. Hamilton, we actively controlled the wavefront of the outgoing sodium laser guidestar beam. It was possible to show that a purposefully aberrated beam resulted in poorer performance of the Adaptive Optics system located behind the primary, though bad seeing conditions prevented us from improving the system's performance over its nominal state. A silver-coated Iris AO deformable mirror was subjected to approximately 9.5 hours of exposure to a sodium laser guidestar of 3.5 Watts average output power and showed no signs of permanent damage or degradation in performance. Future applications of the uplink-AO system for correcting atmospheric turbulence and in generating custom laser guidestar asterisms are also discussed.

  17. 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.

  18. The Recent High State of the BL Lacertae Object AO 0235 and Cross-Correlations between Optical and Radio Bands

    Microsoft Academic Search

    M. Roy; I. E. Papadakis; E. Ramos-Colón; R. Sambruna; K. Tsinganos; J. Papamastorakis; M. Kafatos

    2000-01-01

    We present new optical (B,V,R,I) and radio (at 14.5, 8.5, and 4.8 GHz) observations of the gamma-ray-loud blazar AO 0235+164 obtained during the high state of 1997 December-1998 January. The data were combined with historical light curves from the literature to study correlated optical and radio variations over a time span of more than 20 years. Flux variability with large

  19. 1 Introduc~ao A Mec^anica Estatistica usa como premissas basicas o conhecimento de alguns detalhes mi-

    E-print Network

    Kik, Pieter

    a descri¸c~ao de propriedades e fen^omenos em escala termodin^amica, como equa¸c~oes de estado´iculas que formam um sistema pode mudar radi- calmente as propriedades termodin^amicas. Al´em de abrir: Termodin^amica Neste cap´itulo n´os nos preocuparemos em usar apenas conceitos e leis da Termodin^amica. O

  20. Characterization of OCam and CCD220: the fastest and most sensitive camera to date for AO wavefront sensing

    Microsoft Academic Search

    Philippe Feautrier; Jean-Luc Gach; Philippe Balard; Christian Guillaume; Mark Downing; Norbert Hubin; Eric Stadler; Yves Magnard; Michael Skegg; Mark Robbins; Sandy Denney; Wolfgang Suske; Paul Jorden; Patrick Wheeler; Peter Pool; Ray Bell; David Burt; Ian Davies; Javier Reyes; Manfred Meyer; Dietrich Baade; Markus Kasper; Robin Arsenault; Thierry Fusco; José Javier Diaz-Garcia

    2010-01-01

    For the first time, sub-electron read noise has been achieved with a camera suitable for astronomical wavefront-sensing (WFS) applications. The OCam system has demonstrated this performance at 1300 Hz frame rate and with 240×240-pixel frame rate. ESO and JRA2 OPTICON2 have jointly funded e2v technologies to develop a custom CCD for Adaptive Optics (AO) wavefront sensing applications. The device, called

  1. Radial artery pseudoaneurysm complication from use of AO\\/ASIF volar distal radius plate: A case report

    Microsoft Academic Search

    Khiem D Dao; Eric Venn-Watson; Alexander Y Shin

    2001-01-01

    A case of pseudoaneurysm of the radial artery after fixation of a distal radius using the AO\\/ASIF volar distal radius plate system is presented. This unusual complication resulted from inadequate fracture stabilization and plate preparation. Technical tips on plate shortening and preparation of the cut ends are emphasized. (J Hand Surg 2001;26A:448-453. Copyright © 2001 by the American Society for

  2. Scaling up of the Iris AO Segmented DM Technology for Atmospheric Correction Space-Based Situational Awareness

    Microsoft Academic Search

    M. Helmbrecht; M. He; C. Kempf; P. Rhodes

    2009-01-01

    Adaptive-optical correction of atmospheric turbulence requires deformable mirrors with hundreds to thousands of actuators. Since May of 2008, Iris AO has been developing microelectromechanical systems (MEMS) fabrication processes to support the manufacture of 500-3000 actuator DMs. The DM technology is based on a proven, commercially available, 111-actuator, 37-piston\\/tip\\/tilt segment DM. This poster will present an overview of the MEMS design

  3. Analysis of the AO-FDPC optical heterodyne technique for microwave time delay and phased array beamsteering applications

    Microsoft Academic Search

    William D. Jemison

    2002-01-01

    This paper presents a theoretical analysis of the application of the acousto-optic frequency-dependent phase compensated (AO-FDPC) optical heterodyne technique for microwave time delay applications and phased array beamsteering. A primary goal of the paper is to resolve open questions that have been associated with this interesting and highly referenced technique. The work presented here quantifies, for the first time, the

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

    PubMed Central

    Wu, Fayi; Katsir, Leron J.; Seavy, Margaret; Gaffney, Betty J.

    2005-01-01

    Coral allene oxide synthase (cAOS), a fusion protein with 8R-lipoxygenase in Plexaura homomalla, is a hemoprotein with sequence similarity to catalases. cAOS reacts rapidly with the oxidant peracetic acid to form heme compound I and intermediate II. Concomitantly, an electron paramagnetic resonance (EPR) signal with tyrosyl radical-like features, centered at a g-value of 2.004–2.005, is formed. The radical is identified as tyrosyl by changes in EPR spectra when deuterated tyrosine is incorporated in cAOS. The radical location in cAOS is determined by mutagenesis of Y193 and Y209. Upon oxidation, native cAOS and mutant Y209F exhibit the same radical spectrum, but no significant tyrosine radical forms in mutant Y193H, implicating Y193 as the radical site in native cAOS. Estimates of the side chain torsion angles for the radical at Y193, based on the ?-proton isotropic EPR hyperfine splitting, Aiso, are ?1 = 21 to 30° and ?2 = ?99 to ?90°. The results show that cAOS can cleave nonsubstrate hydroperoxides by a heterolytic path, although a homolytic course is likely taken in converting the normal substrate, 8R-hydroperoxyeicosatetraenoic acid (8R-HpETE), to product. Coral AOS achieves specificity for the allene oxide formed by selection of the homolytic pathway normally, while it inactivates by the heterolytic path with nonoptimal substrates. Accordingly, with the nonoptimal substrate, 13R-hydroperoxyoctadecadienoic acid (13R-HpODE), mutant Y193H is inactivated after turning over significantly fewer substrate molecules than required to inactivate native cAOS or the Y209F mutant because it cannot absorb oxidizing equivalents by forming a radical at Y193. PMID:12779342

  5. RESOLUC ~AO DO TESTE DE AMII DE 7 DE MAIO DE 2005 1. Calcule uma primitiva das seguintes func~oes

    E-print Network

    Granja, Gustavo

    RESOLUC¸ ~AO DO TESTE DE AMII DE 7 DE MAIO DE 2005 1. Calcule uma primitiva das seguintes fun¸c~oes x 3 + 2x2 , x 2 - x2 , sin(log x) 5x , x arctg x. Desenvolva a primeira fun¸c~ao em s´erie de pot desenvolvimento da primeira fun¸c~ao em s´erie de pot^encias de x ´e o seguinte: x 3 + 2x2 = x 3 1 1 + 2 3 x2 = x

  6. Primary progressive apraxia of speech (AOS) in a patient with Pick's disease with Pick bodies: a neuropsychological and anatomical study and review of literatures

    PubMed Central

    Uyama, Naoto; Yokochi, Fusako; Bandoh, Mitsuaki; Mizutani, Toshio

    2012-01-01

    A 56-year-old right-handed man suffered from progressive apraxia of speech (AOS), characterized by agrammatism and buccofacial apraxia. He also became mute at the later stages of the disease progression. At autopsy, the left precentral gyrus, pars opercularis, and hippocampus showed severe atrophy. Pick bodies and Pick cells were observed. In this report, we also review previous case reports of AOS. Pick's disease is among the most commonly associated of the major diseases. Brain lesions associated with AOS may be found in regions such as the precentral gyrus and the pars opercularis in the left hemisphere. PMID:22500674

  7. Removal of surfactants nonylphenol ethoxylates from municipal sewage-comparison of an A/O process and biological aerated filters.

    PubMed

    Gao, Dawen; Li, Zhe; Guan, Junxue; Li, Yifan; Ren, Nanqi

    2014-02-01

    The concentrations of nonylphenol ethoxylates (NPnEO, n=1 to 2) and nonylphenol (NP) in water and sludge samples were measured from a full scale sewage treatment plant (STP) with an Anaerobic/Oxic (A/O) and a Biological Aerated Filter (BAF) process. The A/O process was found to exhibit improved performance in comparison to the BAF process. Mean values of NP, NP1EO and NP2EO concentrations in influents from the STP were similar, ranging from 1.8 to 2.0×10(3)ngL(-1). In the A/O process, the removal efficiency of NP, NP1EO and NP2EO from the aqueous phase was 78%, 84%, and 89%, respectively. In contrast, the removal efficiencies of NP, NP1EO, and NP2EO were relatively lower for the BAF process, at 55%, 76%, and 79%, respectively. High concentrations of NP, NP1EO and NP2EO detected in the sludge samples had a maximum value of 2.7?gg(-1) dw, which indicates that improvement in the overall elimination of NP, NP1EO and NP2EO may be associated with adsorption by the sludge. To further investigate the fate of NP, NP1EO and NP2EO in the STP, our research assessed the degradation characteristics of NP by calculating its transformational loss in the STP. The results demonstrate that the quantity of NP measured in the effluent from the oxic unit increased by 32%, which indicates that NP1EO and NP2EO may undergo degradation in the oxic conditions. PMID:24268176

  8. Clinical Utility of Electrocochleography in the Diagnosis and Management of Meniere's Disease: AOS and ANS Membership Survey Data

    PubMed Central

    Nguyen, Linda T.; Harris, Jeffrey P.; Nguyen, Quyen T.

    2010-01-01

    Objective Evaluate the clinical utility of electrocochleography (ECoG) for diagnosis/treatment of Meniere’s disease among members of the American Otological Society (AOS) and American Neurotology Society (ANS). Subjects Clinically active members of the AOS/ANS. Main Outcome Measure Survey responses. Results A total of 143 responses were received from 344 possible respondents (41.6%). In suspected cases of Meniere’s disease, 45.5% of respondents did not use ECoG at all, 17.5 % used ECoG routinely, and 37.1% used it only in questionable cases. ECoG users differed widely in electrode approach and stimulus modality used, with extratympanic approach and click stimuli used most frequently. A majority of respondents (73.2%) believed that ECoG is a test of indeterminate value. Only 3.6% required an abnormal ECoG to diagnose endolymphatic hydrops. An abnormal test was a requirement to proceed with ablative therapy for just 8.6% of respondents. Still, 77.9% believe that ECoG findings do fluctuate with activity of the disorder, but only 18.0% agree that when the ECoG reverts to normal, one can predict remission of symptoms. Almost half of respondents (46.7%) reported that they have now stopped ordering ECoG due to variability in results and lack of correlation with their patients’ symptoms. Conclusion Among AOS/ANS members, there is low clinical utility of ECoG in diagnosis/management of Meniere’s disease. For approximately half of respondents, ECoG has no role in their clinical practice. ECoG was used routinely by only one in six respondents. Those who used ECoG differed widely in electrode placement and type of stimuli paradigm used. PMID:20104195

  9. Bases morfofisiológicas para maior tolerância dos híbridos modernos de milho a altas densidades de plantas

    Microsoft Academic Search

    Luís Sangoi; Milton Luiz de Almeida; Paulo Regis Ferreira da Silva; Gilber Argenta

    2002-01-01

    RESUMO O lançamento de híbridos de milho tolerantes ao aumento da densidade de plantas contribuiu para o incremento do potencial produtivo da cultura na segunda metade do século XX. Objetiva-se com esta revisão de literatura discutir características morfológicas, fisiológicas, fenológicas e alométricas que contribuíram para maior adaptação do milho a elevadas densidades de plantas. Os processos de seleção utilizados pelos

  10. Diode single-end-pumped AO Q-switched Nd:GdVO 4 266 nm laser

    Microsoft Academic Search

    F. Chen; W. W. Wang; J. Liu

    2010-01-01

    By simple extra-cavity frequency conversion, the performance of a diode single-end-pumped AO Q-switched Nd:GdVO4\\/KTP\\/BBO 266 nm laser was demonstrated. Under the incident pump power of 14.32 W, the maximum average output power at 266\\u000a nm was 374 mW at the repetition of 20 kHz; the opticaloptical conversion efficiency was 2.6%. The corresponding pulse width\\u000a was 5 ns, with the single-pulse

  11. OPEN REDUCTION AND INTERNAL FIXATION OF INTRA ARTICULAR AND UNSTABLE FRACTURES OF THE DISTAL RADIUS USING THE AO DISTAL RADIUS PLATE

    Microsoft Academic Search

    D. A. CAMPBELL

    2000-01-01

    This study reports the results of open reduction and internal fixation of 25 dorsally displaced distal radial fractures using a specifically designed plate for the distal radius, the AO pi plate (Synthes Ltd, Paoli, USA). Twenty-one of these fractures were complex and intra-articular (AO Type ‘C’). Measurement of range of motion of the affected wrist at an average follow-up of

  12. 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

  13. Preferential melt intercalation of clay in ABS\\/brominated epoxy resin–antimony oxide (BER–AO) nanocomposites and its synergistic effect on thermal degradation and combustion behavior

    Microsoft Academic Search

    Haiyun Ma; Zhengping Fang; Lifang Tong

    2006-01-01

    ABS\\/organo montmorillonite (OMT) nanocomposites and ABS\\/brominated epoxy resin–antimony oxide (BER–AO)\\/OMT nanocomposites were prepared via melt compounding. The dispersion of OMT in nanocomposites was investigated by wide-angle X-ray diffraction and transmission electron microscopy. The results revealed an intercalated structure in ABS\\/OMT nanocomposites and the OMT layers mainly distribute in SAN phase. However, a completely exfoliated structure was found in ABS\\/BER–AO\\/OMT nanocomposites

  14. Getting lucky with adaptive optics: diffraction-limited resolution in the visible with current AO systems on large and small telescopes

    NASA Astrophysics Data System (ADS)

    Law, N. M.; Dekany, R. G.; Mackay, C. D.; Moore, A. M.; Britton, M. C.; Velur, V.

    2008-07-01

    We have recently demonstrated diffraction-limited resolution imaging in the visible on the 5m Palomar Hale telescope. The new LAMP instrument is a Lucky Imaging backend camera for the Palomar AO system. Typical resolutions of 35-40 mas with Strehls of 10-20% were achieved at 700nm, and at 500nm the FWHM resolution was as small as 42 milliarcseconds. In this paper we discuss the capabilities and design challenges of such a system used with current and near future AO systems on a variety of telescopes. In particular, we describe the designs of two planned Lucky Imaging + AO instruments: a facility instrument for the Palomar 200" AO system and its PALM3K upgrade, and a visible-light imager for the CAMERA low-cost LGS AO system planned for the Palomar 60" telescope. We introduce a Monte Carlo simulation setup that reproduces the observed PSF variability behind an adaptive optics system, and apply it to predict the performance of 888Cam and CAMERA. CAMERA is predicted to achieve diffraction-limited resolution at wavelengths as short as 350 nm. In addition to on-axis resolution improvements we discuss the results of frame selection with the aim of improving other image parameters such as isoplanatic patch sizes, showing that useful improvements in image quality can be made by Lucky+AO even with very temporally and spatially undersampled data.

  15. 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. [Steward Observatory, The University of Arizona, 933 N Cherry Avenue, Tucson, AZ 85721 (United States)] [Steward Observatory, The University of Arizona, 933 N Cherry Avenue, Tucson, AZ 85721 (United States); Kopon, Derek [Max Planck Institute for Astronomy, Königstuhl 17, D-69117 Heidelberg (Germany)] [Max Planck Institute for Astronomy, Königstuhl 17, D-69117 Heidelberg (Germany); Puglisi, Alfio; Esposito, Simone; Riccardi, Armando; Pinna, Enrico; Xompero, Marco; Briguglio, Runa [INAF - Osservatorio Astrofisico di Arcetri, Largo E. Fermi 5, I-50125 Firenze (Italy)] [INAF - Osservatorio Astrofisico di Arcetri, Largo E. Fermi 5, I-50125 Firenze (Italy)

    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.

  16. Degradation of typical N-nitrosodimethylamine (NDMA) precursors and its formation potential in anoxic-aerobic (AO) activated sludge system.

    PubMed

    Wang, Lin; Li, Yongmei; He, Guodong

    2014-01-01

    N-nitrosodimethylamine (NDMA) is an emerging disinfection byproduct. Removal of its potential precursors is considered as an effective method to control NDMA. In this study, four typical NDMA precursors (dimethylamine (DMA), trimethylamine (TMA), dimethylformamide (DMFA) and dimethylaminobenzene (DMAB)) were selected, and their removal capacities by activated sludge were investigated. Batch experiments indicated that removal of NDMA precursors was better under aerobic condition than anoxic condition; and their specific degradation rates follow the order of DMA > TMA > DMFA > DMAB. In anoxic-aerobic (AO) activated sludge system, the optimal hydraulic retention time and sludge retention time were 10 h and 20 d, respectively, for the removal of both NDMA precursors (four selected NDMA precursors and NDMA formation potential (NDMA FP)) and nutrients. Our results also suggested that there was a positive correlation between NDMA FP and dissolved organic nitrogen (DON) in wastewater. The removal efficiency of NDMA FP was in the range of 46.8-72.5% in the four surveyed wastewater treatment plants except the one which adopted chemically enhanced primary process. The results revealed that the AO system had the advantage of removing NDMA FP. Our results are helpful for the knowledge of the removals of NDMA precursors during activated sludge treatment processes. PMID:25320860

  17. Simultaneous removal of nutrients from milking parlor wastewater using an AO2 sequencing batch reactor (SBR) system.

    PubMed

    Wu, Xiao; Zhu, Jun

    2015-01-01

    The feasibility of using a lab-scale, anaerobic-aerobic-anoxic-aerobic sequencing batch reactor ((AO)2 SBR) to simultaneously remove biological organics, nitrogen and phosphorus from dairy milking parlor wastewater was investigated in this study. Three hydraulic retention times (HRT = 2.1, 2.7, and 3.5 days) and three mixing-to-process time ratios (TM/TP = 0.43, 0.57, and 0.68) were evaluated as two controlling factors using a 3 × 3 experimental design to determine the optimal combination. Results showed that the HRT of 2.7 days with TM/TP = 0.57 was the best to achieve simultaneous nutrients removal for the influent with initial soluble chemical oxygen demand (SCOD) of about 2000 mg L(-1) (only 0.55 mg L(-1) NH4-N, < 0.1 mg L(-1) nitrate, and 0.14 mg L(-1) soluble phosphorus in the effluent). Good correlations between pH and ORP, and ORP and DO, were also obtained with correlation coefficients all higher than or equal to 0.975. These relationships could be used to develop real-time control strategies to optimize the duration of each operating phase in the (AO)2 SBR system to save energy and enhance treatment efficiency. PMID:25723066

  18. A pilot scale anoxic/oxic membrane bioreactor (A/O MBR) for woolen mill dyeing wastewater treatment.

    PubMed

    Zheng, Xiang; Fan, Yao-bo; Wei, Yuan-song

    2003-07-01

    A pilot-scale (10 m3/d) anoxic/oxic membrane bioreactor (A/O MBR) was tested for dyeing wastewater treatment of woolen mill without wasting sludge in 125 days operation. Results showed that the effluent quality was excellent, i.e. effluent COD less than 25 mg/L, BOD5 under 5 mg/L, turbidity lower than 0.65 NTU, and colour less than 30 DT, and met with the reuse water standard of China. The removal rates of COD, BOD5, colour, and turbidity were 92.4%, 98.4%, 74% and 98.9%, respectively. Constant-flux operation mode was carried out in this study, and backwash was effective for reducing membrane fouling and maintaining constant flux. Membrane fouling had heavy impact on energy consumption. More attention should be paid on pipe selection and design for the sidestream MBR system, too. PMID:12974303

  19. Swimming with ShARCS: comparison of on-sky sensitivity with model predictions for ShaneAO on the Lick Observatory 3-meter telescope

    NASA Astrophysics Data System (ADS)

    Srinath, Srikar; McGurk, Rosalie; Rockosi, Constance; Kupke, Renate; Gavel, Donald; Cabak, Gerald; Cowley, David; Peck, Michael; Ratliff, Christopher; Gates, Elinor; Dillon, Daren; Norton, Andrew; Reining, Marc

    2014-08-01

    The Lick Observatory's Shane 3-meter telescope has been upgraded with a new infrared instrument (ShARCS - Shane Adaptive optics infraRed Camera and Spectrograph) and dual-deformable mirror adaptive optics (AO) system (ShaneAO). We present first-light measurements of imaging sensitivity in the Ks band. We compare mea- sured results to predicted signal-to-noise ratio and magnitude limits from modeling the emissivity and throughput of ShaneAO and ShARCS. The model was validated by comparing its results to the Keck telescope adaptive optics system model and then by estimating the sky background and limiting magnitudes for IRCAL, the pre- vious infra-red detector on the Shane telescope, and comparing to measured, published results. We predict that the ShaneAO system will measure lower sky backgrounds and achieve 20% higher throughput across the JHK bands despite having more optical surfaces than the current system. It will enable imaging of fainter objects (by 1-2 magnitudes) and will be faster to reach a fiducial signal-to-noise ratio by a factor of 10-13. We highlight the improvements in performance over the previous AO system and its camera, IRCAL.

  20. Scribere Est Agere ou O Direito ao Grito: O Intelectual Oprimido e a Hora do Subalterno em A Hora da Estrela

    E-print Network

    Tosta, Antonio L.

    2009-01-05

    referente brasileiro. 2 Em “Oratio Pro Archia Poeta,” Cícero comenta que homens como Scipio Africano, Laelius, Lúcio Furius e Marcus Cato “certamente não teriam dedicado seu tempo aos estudos literários se estes não tivessem ajudado-lhes a entender como...Revista Iberoamericana , Vol. LXXV, Núm. 226, Enero-Marzo 2009, 243-260 SCRIBERE EST AGERE OU O DIREITO AO GRITO: O INTELECTUAL DEPRIMIDO E A HORA DO SUBALTERNO EM A HORA DA ESTRELA POR ANTONIO LUCIANO DE ANDRADE TOSTA The University of Illinois...

  1. A Diffraction-limited Survey for Direct Detection of Halpha Emitting/Accreting ExtraSolar Planets with the 6.5m Magellan Telescope and the MagAO Visible AO system

    NASA Astrophysics Data System (ADS)

    Close, Laird

    TECHNICAL BACKGROUND: An advanced adaptive secondary mirror (ASM) with 585 actuators was commissioned at the 6.5-m Magellan Telescope at one of the world’s best sites (Las Campanas Observatory; LCO) in Chile. By the end of the commissioning run (April 2013) the MagAO system was regularly producing the highest spatial resolution deep images to date (0.023” deep images at Halpha (0.656 microns); Close et al. 2013). This is due to its 378 corrective modes at 1kHz on a 6.5-m telescope. Strehl ratis>20% at Halpha were obtained in 75% of the seeing statistics at the site. We propose here to utilize MagAO’s absolutely unique ability to take Halpha, continuum (0.643 microns), and L’ (3.8 microns) thermal images (all simultaneously) to carry out a novel survey to: Discover a population of the lowest mass young accreting extrasolar planets imaged to date. to characterize the spatial distribution, and estimate accretion rates, of young extrasolar planets >5AU, to understand the influence of planets on transitional disk gaps. THEORY BACKGROUND: Extrasolar planets are very difficult to image directly since planets become very faint below ~8 Mjup (Jupiter masses) for ages >1 Myr and such massive planets are rare. There is a class of young stars that are still accreting yet have SED (and often imaging) evidence of a lack of dust and gas inside a r=5-140 AU “gap”. These “transitional disks” are believed to be transitioning into “disk free” stars. These gaps are believed to be maintained by planets that continuously clear (though scattering or accretion) the optically thin gaps. Indeed large >10 AU gaps (>few Hill spheres) must be maintained by multiple ~1 Mjup planets (Dodson-Robinson & Salyk 2011). Since gas must pass through each of these gaps to continuously supply the accreting star, simulations suggest that these “gap planets” are also crossing points for these gas streamers on their way to the star. These streamers “force-feed” these planets a steady diet of hydrogen gas. Such planets should then be quite bright in Halpha accretion emission. The key point is that: instead of a steep drop off in the luminosity of the planet’s atmosphere, the accretion luminosity of these planets will just linearly decrease with decreasing mass. At an accretion rate=6e-10 Msun/yr we find low mass (~1 Mjup) accreting gap planets are much (50-1000x) brighter (for 0-3.4 mag of Halpha extinction) in Halpha than at H band. PROOF-OF_CONCEPT: A 3 hour MagAO observation at Halpha of a transitional disk in April 2013 was made. The resulting deep diffraction-limited images discovered (at 10.5 sigma) an Halpha source that was 295% above the continuum just 0.083” from the star (edge of the inner 10 AU disk gap). We also detected (at 5 sigma) an excellent (though much fainter) ~1 Mjup mass Halpha planet candidate located auspiciously at the outer edge (145 AU) of the gap. If confirmed by our “second epoch” follow-up as common proper motion then this would be the lowest mass (~1 Mjup) planet ever imaged. SURVEY: Scaling off of this exciting success we propose to deeply image (120 min) all 14 nearby (D<250pc), bright (R<11 mag) , not edge-on (i<80 deg) , young (~5 Myr) transitional disks with MagAO simultaneously at Halpha and L’. In addition, we will use BrGamma instead of Halpha for 8 additional fainter (111 Mjup in mass, we integrate across our target list and find that, in the worst case of minimal masses (1+/-0.5 Mjup), and 3.4 mag extinction, at least seven ~1 Mjup planets should be discovered by this survey --meeting all three of our science goals above.

  2. 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.

  3. 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.

  4. Multi-wavelength observations of blazar AO 0235+164 in the 2008-2009 flaring state

    E-print Network

    Ackermann, 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; Johannesson, G; Johnson, A S; Katagiri, H; Kataoka, J; Knodlseder, 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; Raino, S; Rando, R; Rastawicki, D; Razzano, M; Readhead, A; Reimer, A; Reimer, O; Reyes, L C; Richards, J L; Sbarra, C; Sgro, 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; Moderski, R; Nalewajko, K; Sikora, M; Villata, M; Raiteri, C M; Aller, H D; Aller, M F; Arkharov, A A; Benitez, E; Berdyugin, A; Blinov, D A; Boettcher, M; Calle, O J A Bravo; Buemi, C S; Carosati, D; Chen, W P; Diltz, C; Di Paola, A; Dolci, M; Efimova, N V; Forn\\', E; Gurwell, M A; Heidt, J; Hiriart, D; Jordan, B; Kimeridze, G; Konstantinova, T S; Kopatskaya, E N; Koptelova, E; Kurtanidze, O M; Lahteenmaki, 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; Sillanpaa, A; Takahashi, T; Takalo, L O; Tornikoski, M; Trigilio, C; Troitsky, I S; Umana, G; Angelakis, E; Krichbaum, T P; Nestoras, I; Riquelme, D; Krips, M; Trippe, S; Arai, A; Kawabata, K S; Sakimoto, K; Sasada, M; Sato, S; Uemura, M; Yamanaka, M; Yoshida, M; Belloni, T; Tagliaferri, G; Bonning, E W; Isler, J; Urry, C M; Hoversten, E; Falcone, A; Pagani, C; Stroh, M

    2012-01-01

    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 {\\gamma} -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 {\\gamma} -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 th...

  5. 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.

  6. Ao judicial 930007202-1 j paga em fevereiro 10/02/2006 -2006 comea com mais uma boa notcia para um grupo de

    E-print Network

    Floeter, Sergio Ricardo

    correspondente ao período de férias), vantagens essas que deveriam ter sido pagas em até dois dias antes do ANADETE DE SOUZA PIROLO ANDRE LUIZ DIAS ANGELA OLINDA DALRI ANTONIO CARLOS DE FREITAS NORONHA ANTONIO PACHECO GREGORIO DIRCEIA PACHECO GREGORIO DJALMA DIAS FRANZONI DORIS DUTRA MORATO DORVALINO JORGE DA SILVA

  7. Safety Kernel for Cooperative Sensor-Based Systems Pedro Nobrega da Costa, Jo~ao Pedro Craveiro, Antonio Casimiro, and Jose Rufino

    E-print Network

    Paris-Sud XI, Université de

    of the system will be instrumental to manage the system behaviour and ensure safety. In this paper, we describeSafety Kernel for Cooperative Sensor-Based Systems Pedro N´obrega da Costa, Jo~ao Pedro Craveiro the architecture and role of such Safety Kernel in the context of a hybrid system architecture. The Safety Kernel

  8. Swimming with ShARCS: Comparison of On-sky Sensitivity With Model Predictions for ShaneAO on the Lick Observatory 3-meter Telescope

    E-print Network

    Srinath, Srikar; Rockosi, Constance; Kupke, Renate; Gavel, Donald; Cabak, Gerald; Cowley, David; Peck, Michael; Ratliff, Christopher; Gates, Elinor; Peck, Michael; Dillon, Daren; Norton, Andrew; Reining, Marc

    2014-01-01

    The Lick Observatory's Shane 3-meter telescope has been upgraded with a new infrared instrument (ShARCS - Shane Adaptive optics infraRed Camera and Spectrograph) and dual-deformable mirror adaptive optics (AO) system (ShaneAO). We present first-light measurements of imaging sensitivity in the Ks band. We compare measured results to predicted signal-to-noise ratio and magnitude limits from modeling the emissivity and throughput of ShaneAO and ShARCS. The model was validated by comparing its results to the Keck telescope adaptive optics system model and then by estimating the sky background and limiting magnitudes for IRCAL, the previous infra-red detector on the Shane telescope, and comparing to measured, published results. We predict that the ShaneAO system will measure lower sky backgrounds and achieve 20\\% higher throughput across the $JHK$ bands despite having more optical surfaces than the current system. It will enable imaging of fainter objects (by 1-2 magnitudes) and will be faster to reach a fiducial ...

  9. 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…

  10. Mechanistic insights into the catalytic reaction of plant allene oxide synthase (pAOS) via QM and QM/MM calculations.

    PubMed

    Somboon, Tuanjai; Ochiai, Jun; Treesuwan, Witcha; Gleeson, M Paul; Hannongbua, Supa; Mori, Seiji

    2014-07-01

    QM cluster and QM/MM protein models have been employed to understand aspects of the reaction mechanism of plant allene oxide synthase (pAOS). In this study we have investigated two reaction mechanisms for pAOS. The standard pAOS mechanism was contrasted with an alternative involving an additional active site molecule which has been shown to facilitate proton coupled electron transfer (PCET) in related systems. Firstly, we found that the results from QM/MM protein model are comparable with those from the QM cluster model, presumably due to the large active site used. Furthermore, the results from the QM cluster model show that the Fe(III) and Fe(IV) pathways for the standard mechanism have similar energetic and structural properties, indicating that the reaction mechanism may well proceed via both pathways. However, while the PCET process is facilitated by an additional active site bound water in other related families, in pAOS it is not, suggesting this type of process is not general to all closely related family members. PMID:24984079

  11. SHRP Scholarships Available for the 2014-15 Academic Year a/o April 8, 2014 (may be subject to change)

    E-print Network

    Cheng, Mei-Fang

    SHRP Scholarships Available for the 2014-15 Academic Year a/o April 8, 2014 (may be subject to change) Open to all SHRP students Stanley Bergen Endowed Scholarship Partial tuition, academic excellence & some financial need, NJ resident and US citizen. CV Prescription One scholarship; standard SHRP

  12. Uma experiência educacional de incentivo ao aleitamento materno e estimulação do bebê, para mães de nível sócio-econômico baixo: estudo preliminar

    Microsoft Academic Search

    Victoria Garcia-Montrone; Júlio C. de Rose

    1996-01-01

    Resumo Este estudo efetuou uma avaliação preliminar da eficácia de um programa educacio- nal de estímulo ao aleitamento materno, que inclui a introdução simultânea de técnicas de esti- mulação do bebê. O programa, elaborado por Garcia-Montrone (1992), foi aplicado a um grupo de mães de nível sócio-econômico baixo (grupo experimental). Tal programa foi avaliado atra- vés de sessões de observação

  13. O PROCESSO DECISÓRIO DE IMPLANTAÇÃO DE ESTRUTURA DE ARMAZENAGEM DE SOJA AO NÍVEL DE PROPRIEDADE RURAL NA REGIÃO DE SANTO ÂNGELO\\/RS

    Microsoft Academic Search

    Alberto Silva Dutra; Joao Armando Dessimon Machado; Regis Rathmann

    2008-01-01

    Considerando-se que existe um déficit na capacidade estática de armazenamento de grãos no Brasil, aliado a baixa margem de rentabilidade auferida pelos produtores de commodities agrícolas, notadamente a soja, bem como o fato de que a armazenagem em nível de propriedade rural pode vir a se constituir em um diferencial positivo ao produtor no momento da comercialização desta oleaginosa, buscou-se

  14. 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.

  15. A negative phase shift of the winter AO/NAO due to the recent Arctic sea-ice reduction in late autumn

    NASA Astrophysics Data System (ADS)

    Nakamura, Tetsu; Yamazaki, Koji; Iwamoto, Katsushi; Honda, Meiji; Miyoshi, Yasunobu; Ogawa, Yasunobu; Ukita, Jinro

    2015-04-01

    This paper examines the possible linkage between the recent reduction in Arctic sea-ice extent and the wintertime Arctic Oscillation (AO)/North Atlantic Oscillation (NAO). Observational analyses using the ERA interim reanalysis and merged Hadley/Optimum Interpolation Sea Surface Temperature data reveal that a reduced (increased) sea-ice area in November leads to more negative (positive) phases of the AO and NAO in early and late winter, respectively. We simulate the atmospheric response to observed sea-ice anomalies using a high-top atmospheric general circulation model (AGCM for Earth Simulator, AFES version 4.1). The results from the simulation reveal that the recent Arctic sea-ice reduction results in cold winters in mid-latitude continental regions, which are linked to an anomalous circulation pattern similar to the negative phase of AO/NAO with an increased frequency of large negative AO events by a factor of over two. Associated with this negative AO/NAO phase, cold air advection from the Arctic to the mid-latitudes increases. We found that the stationary Rossby wave response to the sea-ice reduction in the Barents Sea region induces this anomalous circulation. We also found a positive feedback mechanism resulting from the anomalous meridional circulation that cools the mid-latitudes and warms the Arctic, which adds an extra heating to the Arctic air column equivalent to about 60% of the direct surface heat release from the sea-ice reduction. The results from this high-top model experiment also suggested a critical role of the stratosphere in deepening the tropospheric annular mode and modulation of the NAO in mid to late winter through stratosphere-troposphere coupling.

  16. Deriving the true mass of an unresolved Brown Dwarf companion to an M-Dwarf with AO aided astrometry

    NASA Astrophysics Data System (ADS)

    Meyer, E.; Kürster, M.

    2011-07-01

    From radial velocity (RV) detections alone one does not get all orbital parameters needed to derive the true mass of a non-transiting, unresolved substellar companion to a star. Additional astrometric measurements are needed to calculate the inclination and the longitude of the ascending node. Until today only few true substellar companion masses have been determined by this method with the HST fine guidance sensor [1, 2]. We aim to derive the true mass of a brown dwarf candidate companion to an early M 2.5V dwarf with groundbased high-resolution astrometry aided by adaptive optics. We found this unique brown dwarf desert object, whose distance to the host star is only 0.42 AU, in our UVES precision RV survey of M dwarfs, inferring a minimum companion mass of 27 Jupiter masses [3]. Combining the data with HIPPARCOS astrometry, we found a probability of only 2.9% that the companion is stellar. We therefore observed the host star together with a reference star within a monitoring program with VLT/NACO to derive the true mass of the companion and establish its nature (brown dwarf vs. star). Simultaneous observations of a reference field in a globular cluster are performed to determine the stability of the adaptive optics (AO) plus detector system and check its suitability for such high-precision astrometric measurements over several epochs which are needed to find and analyse extrasolar planet systems. Based on observations collected at the European Southern Observatory, Paranal, Chile, programmes 381.C-0235, 281.C-5057 and 383.C-0248.

  17. Fluid inclusion characteristics and geological significance of the Xi'ao copper-tin polymetallic deposit in Gejiu, Yunnan Province

    NASA Astrophysics Data System (ADS)

    Liao, Shili; Chen, Shouyu; Deng, Xiaohu; Li, Pei; Zhao, Jiangnan; Liao, Ruanyingzi

    2014-01-01

    The newly discovered Xi'ao Cu-Sn polymetallic deposit is located in the inner alteration zone of the Laochang-Kafang granite edge in Gejiu, Yunnan Province. The mineralization process of this deposit can be divided into four stages. Cassiterite and chalcopyrite mainly formed at stages II and III, respectively. Fluid inclusions at different stages were studied by petrography, microthermometry, and laser Raman spectrometry. Five fluid inclusion types are observed. Microthermometry results revealed that the ore-forming fluid evolved from high temperature with low to intermediate salinity to low temperature with low salinity. At stage I, the fluid was under near-critical conditions and then separated into coexisting liquid and vapor phases at stage II. Finally, the fluid was boiling and immiscible at stage III. A meteoric fluid mixing process was also observed at this stage. Laser Raman spectra identified CH4 at the skarn and mineralization stages. Combined with other geological features, the deposit was concluded to have formed under a relatively reduced environment. The CO2 component abruptly increased at stage III and probably originated from the exterior. Fluorine may play an important role in mineralization. Cassiterite and chalcopyrite were mainly deposited at 340-440 and 300-400 °C under pressures of 18-50 and 12-36 MPa, respectively. Boiling and immiscibility are probably the main reason for mineral deposition. The deposit of cassiterite and chalcopyrite showed similar salinities but higher temperatures than other mineralization types of deposits in the Gejiu area. This finding indicated that the study deposit probably represents the high-temperature part of the Gejiu mineralization system, thereby benefiting mineral explorations in the Gejiu area.

  18. 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.

  19. Anais do XXXI Congresso da Sociedade Brasileira de Computac~ao, XI Workshop de Informatica Medica, Natal, RN, 19-22 de julho de 2011, ISSN 2175-2761

    E-print Network

    Baranauskas, José Augusto

    Anais do XXXI Congresso da Sociedade Brasileira de Computac¸~ao, XI Workshop de Inform´atica M´edica XXXI Congresso da Sociedade Brasileira de Computac¸~ao, XI Workshop de Inform´atica M´edica, Natal, RN ficou muito f´acil armazenar grandes quan- tidades de dados. Na ´area m´edica, esse crescimento ´e not

  20. Anais do XXXII Congresso da Sociedade Brasileira de Computac~ao, XII Workshop de Informatica Medica, Curitiba, PR, 16-19 de julho de 2012, ISSN 2175-2761

    E-print Network

    Baranauskas, José Augusto

    Anais do XXXII Congresso da Sociedade Brasileira de Computac¸~ao, XII Workshop de Inform´atica M´edica Sociedade Brasileira de Computac¸~ao, XII Workshop de Inform´atica M´edica, Curitiba, PR, 16-19 de julho de

  1. 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.

  2. High-resolution Images of Orbital Motion in the Orion Trapezium Cluster with the LBT AO System

    NASA Astrophysics Data System (ADS)

    Close, L. M.; Puglisi, A.; Males, J. R.; Arcidiacono, C.; Skemer, A.; Guerra, J. C.; Busoni, L.; Brusa, G.; Pinna, E.; Miller, D. L.; Riccardi, A.; McCarthy, D. W.; Xompero, M.; Kulesa, C.; Quiros-Pacheco, F.; Argomedo, J.; Brynnel, J.; Esposito, S.; Mannucci, F.; Boutsia, K.; Fini, L.; Thompson, D. J.; Hill, J. M.; Woodward, C. E.; Briguglio, R.; Rodigas, T. J.; Briguglio, R.; Stefanini, P.; Agapito, G.; Hinz, P.; Follette, K.; Green, R.

    2012-04-01

    The new 8.4 m LBT adaptive secondary AO system, with its novel pyramid wavefront sensor, was used to produce very high Strehl (gsim 75% at 2.16 ?m) near-infrared narrowband (Br?: 2.16 ?m and [Fe II]: 1.64 ?m) images of 47 young (~1 Myr) Orion Trapezium ?1 Ori cluster members. The inner ~41 × 53'' of the cluster was imaged at spatial resolutions of ~0farcs050 (at 1.64 ?m). A combination of high spatial resolution and high S/N yielded relative binary positions to ~0.5 mas accuracies. Including previous speckle data, we analyze a 15 year baseline of high-resolution observations of this cluster. We are now sensitive to relative proper motions of just ~0.3 mas yr-1 (0.6 km s-1 at 450 pc); this is a ~7 × improvement in orbital velocity accuracy compared to previous efforts. We now detect clear orbital motions in the ?1 Ori B 2 B 3 system of 4.9 ± 0.3 km s-1 and 7.2 ± 0.8 km s-1 in the ?1 Ori A 1 A 2 system (with correlations of P.A. versus time at >99% confidence). All five members of the ?1 Ori B system appear likely a gravitationally bound "mini-cluster." The very lowest mass member of the ?1 Ori B system (B 4; mass ~0.2 M ?) has, for the first time, a clearly detected motion (at 4.3 ± 2.0 km s-1 correlation = 99.7%) w.r.t. B 1. However, B 4 is most likely in a long-term unstable (non-hierarchical) orbit and may "soon" be ejected from this "mini-cluster." This "ejection" process could play a major role in the formation of low-mass stars and brown dwarfs. The LBT is an international collaboration among institutions in the United States, Italy, and Germany. LBT Corporation partners are: The University of Arizona on behalf of the Arizona University system; Istituto Nazionale di Astrofisica, Italy; LBT Beteiligungsgesellschaft, Germany, representing the Max-Planck Society, the Astrophysical Institute Potsdam, and Heidelberg University; The Ohio State University, and The Research Corporation, on behalf of The University of Notre Dame, University of Minnesota and University of Virginia.

  3. Characterization of AB74, ARS, AO7, and DR28 During the Electro-Fenton Process by Using Three-Dimensional Excitation and Emission Matrix Fluorescence Spectroscopy

    NASA Astrophysics Data System (ADS)

    Zhang, Y. H.; Lai, B.; Zhou, Y. X.; Wang, J. L.; Yang, P.

    2013-11-01

    The characteristics of Acid Blue 74 (AB74), Alizarin Red S (ARS), Acid Orange 7 (AO7) and Direct Red 28 (DR28) were investigated by using EEM fluorescence spectroscopy and UV-vis spectroscopy. The results suggest that the azo and anthraquinone dyes can be quickly distinguished from other dyes (such as AB74) according to their different total fluorescence intensity. During the decolorization process by the electro-Fenton technique, the total fluorescence intensity of the four dyes all would increase to their maximum value, but the fluorescence intensity increase in multiples of 12 (ARS), 61 (AO7), and 13 (DR28) times was much higher than that of AB74 (3 times). Furthermore, the different fluorescence intensities of the four dyes in the electro-Fenton process resulted mainly from their different chemical structure characteristics. Additionally, EEM spectroscopy can support much more information about the chemical structure characteristics of the dyes than the conventional UV-vis spectroscopy.

  4. The aggregate behavior of branch points: the use of branch point pairing to generate a hidden phase for closed-loop AO

    NASA Astrophysics Data System (ADS)

    Tewksbury-Christle, Carolyn M.; Oesch, Denis W.; Sanchez, Darryl J.; Kelly, Patrick R.

    2009-08-01

    Recent research has shown that branch points, as they appear in astronomical applications, have a rich collective behavior, showing, in particular, that branch point pairs have a well-defined, non-stoichastic velocity, and that once a branch point pairs location is measured, it can be tracked in open-loop adaptive optics operation. The research presented here uses this new information as a priori knowledge in closed-loop AO. Specifically, an algorithm was developed that measures branch point location and velocity at time tk and then uses this to estimate the phase contribution at time tk+n, giving it an effective memory of where branch points appear and allowing it to determine more accurately between real branch points and noise. The output of the new algorithm is used as a second input to the DM control law. Results of initial closed-loop AO tests will be presented.

  5. L. Cavique, C. Rego, I. Themido / Investigac~ao Operacional, 22 (2002) 1-18 1 Estruturas de vizinhanca e procura local no

    E-print Network

    Cavique, Luís

    2002-01-01

    L. Cavique, C. Rego, I. Themido / Investiga¸c~ao Operacional, 22 (2002) 1-18 1 Estruturas de vizinhan¸ca e procura local no problema da clique m´axima Lu´is Cavique § C´esar Rego Isabel Themido design´amos por Tabu Publicado postumamente. #12;2 L. Cavique, C. Rego, I. Themido / Investiga

  6. ~'''\\{'. .',',,',.f 'j>., ..'lo:-!'/,'~ ,~;!;~;'t:,~;,.,;c',;.,--".1.J','".,,';; ,.,':,<,,: '" :; ','" ,'.r',,' ','". BIOCYCLE AO (10): 44--(199J~.~~~~;;tfij~j

    E-print Network

    Tiquia-Arashiro, Sonia M.

    to have a compost or pellet, the material would have to be treat- ed for about another six weeks. Bio',,' ','". "'- ,.'--"';'-'~~=,,-":"':;";,,;"':.: BIOCYCLE AO (10): 44--(199§J~.~~~~;;tfij~j product coming out of the barns is not sta- ble compost sawdust in ,the barn each time," says Hoitink. "It is not by any means a mature compost.If youwanted

  7. 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 of about 100 square meters. To explain this behavior and provide a statistical physics approach to sea ice

  8. Comunicamos que encontra-se aberto o EDITAL N. 06/2014 NC, (http://www.nc.ufpr.br/) referente ao Teste de Suficincia em Lngua

    E-print Network

    Paraná, Universidade Federal do

    ://www.nc.ufpr.br/) referente ao Teste de Suficiência em Língua Estrangeira para os interessados em ingressar nos programas de pós-graduação "stricto sensu" oferecidos pela UFPR. Informamos que a Suficiência em Língua Inglesa é um requisito para o ingresso no Programa de Pós-graduação em Segurança Alimentar e Nutricional

  9. (19) COLfoPTERES AQUATIQUES D'ESPAGNE (C OLEOPTU(,'.) 133 SERRANO (A. R.), 1984. -Contribui((ao para 0 inventariayao dos cole6pteros de Portugal.

    E-print Network

    Ribera, Ignacio

    ((ao para 0 inventariayao dos cole6pteros de Portugal. B/afao Agr. Nacional Oeiras, 269 pp. SOLER (A. G.), 1972. - Los co/eop/eros aCl/a/ieos de las marismas del bajo Guadalquivir. - Resumen de Tesis Doctoral «Torres Sal{J) de co/eop/eros )' lepidop/eros de /odo el mundo. v"o/. 1. Diputaci6n Provincial de Valencia

  10. Integrate Remote Sensing and GIS: a primary study of adding remotely sensed image processing functions to ArcGIS8.3 using Matlab COM Builder and AO

    Microsoft Academic Search

    Shaobo Zhong; Yong Xue; Jianqin Wang; Yincui Hu; Ying Luo; Guoyin Cai; Shuhua Qi

    2006-01-01

    This paper systematically introduces the practice of adding remotely sensed image processing functions to ArcGIS8.3 using Matlab COM Builder and AO. We also compare the performance of our system with that of the proprietary RS software ERDAS IMAGE8.5. The performance of our system is a bit lower than ERDAS IMAGINE, but the availability of power functions, the high efficient development

  11. La fracture instable du radius distal et son traitement : comparaison de trois méthodes reconnues : fixateur externe, embrochage centromédullaire et plaque AO

    Microsoft Academic Search

    G. R Sennwald; D Della Santa

    2001-01-01

    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

  12. PALMAR PLATE FIXATION OF AO TYPE C2 FRACTURE OF DISTAL RADIUS USING A LOCKING COMPRESSION PLATE – A BIOMECHANICAL STUDY IN A CADAVERIC MODEL

    Microsoft Academic Search

    F. LEUNG; L. ZHU; H. HO; W. W. LU; S. P. CHOW

    2003-01-01

    The stability of palmar plate fixation using a locking compression T-plate was compared with that of a conventional palmar T-plate and a dorsal T-plate in a cadaveric model of an AO type C2 fracture of distal radius. The wrist axial load transmission through the radius was tested for each fixation. The results show that, under 100N axial load, the palmar

  13. Centre Te Ao Tamariki Early Childhood Learning Centre Sheila Walker Unit ChiLd'S NAmE/TE iNgoA o T TAmAiTi

    E-print Network

    Hickman, Mark

    TAmAiTi Sex Female/Kotiro male/Tane date of birth/Te rä whänau Child's address/Kainga NAmE oF pCentre Te Ao Tamariki Early Childhood Learning Centre Sheila Walker Unit ChiLd'S NAmE/TE iNgoA o TÖ other people who may collect you child please list anyone who is forbidden to have access to your child

  14. 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.

  15. Eco-friendly chitosan production by Syncephalastrum racemosum and application to the removal of acid orange 7 (AO7) from wastewaters.

    PubMed

    Batista, Anabelle C L; Silva, Marta C Freitas; Batista, Jefferson B; Nascimento, Aline Elesbão; Campos-Takaki, Galba M

    2013-01-01

    Due to the existence of new methodologies that have reduced the production costs of microbiological chitosan, this paper puts forward the use of agro-industrial residues in order to produce microbiological chitosan and to apply chitosan as an innovative resource for removing acid orange 7 (AO7) from wastewaters. The best culture conditions were selected by a full 24 factorial design, and the removal of the dye was optimized by a 23 central composite rotational design. The results showed that corn steep liquor (CSL) is an agro-industrial residue that can be advantageously used to produce microbiological chitosan with yields up to 7.8 g/kg of substrate. FT-IR spectra of the product showed typical peak distributions like those of standard chitosan which confirmed the extracted product was chitosan-like. The efficiency of removing low concentrations of AO7 by using microbiological chitosan in distilled water (up to 89.96%) and tap water (up to 80.60%) was significantly higher than the efficiency of the control (chitosan obtained from crustaceans), suggesting that this biopolymer is a better economic alternative for discoloring wastewater where a low concentration of the dye is considered toxic. The high percentage recovery of AO7 from the microbiological chitosan particles used favors this biopolymer as a possible bleaching agent which may be reusable. PMID:23884118

  16. Diffraction-limited Visible Light Images of Orion Trapezium Cluster with the Magellan Adaptive Secondary Adaptive Optics System (MagAO)

    NASA Astrophysics Data System (ADS)

    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.

    2013-09-01

    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 ?m) images are slightly coarser at FWHM = 23-29 mas (Strehl ~28%) with bright (R < 9 mag) guide stars. These are the highest resolution filled-aperture images published to date. Images of the young (~1 Myr) Orion Trapezium ?1 Ori A, B, and C cluster members were obtained with VisAO. In particular, the 32 mas binary ?1 Ori C 1 C 2 was easily resolved in non-interferometric images for the first time. The relative positions of the bright trapezium binary stars were measured with ~0.6-5 mas accuracy. We are now sensitive to relative proper motions of just ~0.2 mas yr-1 (~0.4 km s-1 at 414 pc)—this is a ~2-10 × improvement in orbital velocity accuracy compared to previous efforts. For the first time, we see clear motion of the barycenter of ?1 Ori B 2 B 3 about ?1 Ori B 1. All five members of the ?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 ?1 Ori B system (B 4; mass ~0.2 M ?) has a very clearly detected motion (at 4.1 ± 1.3 km s-1 correlation = 99.9%) w.r.t. B 1. Previous work has suggested that B 4 and B 3 are on long-term unstable orbits and will be ejected from this "mini cluster." However, our new "baseline" model of the ?1 Ori B system suggests a more hierarchical system than previously thought, and so the ejection of B 4 may not occur for many orbits, and B 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. This paper includes data gathered with the 6.5 m Magellan Telescopes located at Las Campanas Observatory, Chile.

  17. [Effects of dissolved oxygen in the oxic parts of A/O reactor on degradation of organic pollutants and analysis of microbial community for treating petrochemical wastewater].

    PubMed

    Ding, Peng-Yuan; Chu, Li-Bing; Zhang, Nan; Wang, Xing; Wang, Jian-Long

    2015-02-01

    Effects of dissolved oxygen (DO) on the biodegradation of organic pollutants were investigated using A/O reactors for the treatment of actual petrochemical wastewater. Two A/O reactors, DO were controlled at 2-3 mg x L(-1) in the oxic parts of reactor A and 5-6 mg x L(-1) of reactor B, were operated in parallel for comparison. The nearly a half of year operation results showed that the effluent COD in reactor A (72.5 ± 14.8 mg x L(-1)) was slightly higher than that in reactor B (68.7 ± 14.6 mg x L(-1)) at a HRT of 20 h. The average COD removal efficiencies were 67.0% and 68.8%, respectively. The effluent ammonium concentration was maintained at 0.8 mg x L(-1) and approximately 95% of ammonium removal was achieved. The effluent BOD, concentration was lower than 5 mg x L(-1). This indicated that the organic pollutants could be degraded thoroughly by the A/O processes, which were affected slightly by DO. Results of 454 pyrosequencing analysis of the sludge in oxic parts showed that at the phylum levels, sequences belonged to Proteobacteria, Planctomycetes and Bacteroidetes were abundant with 58.7% and 59.2%, 14.7% and 12.7%, 10.8% and 12.4% of total bacterial sequences in reactor A and B, respectively. Ammonium oxidation bacteria Nitrosomonas, nitrite oxidizing bacteria Nitrospira and obligate aerobic bacteria were highly enriched in reactor B with high DO levels, while the anaerobic denitrifiers Azospira and Acidovora were highly enriched in reactor A with low DO levels. The identified bacteria belonged to genera Novosphingobium, Comamonas, Sphingobium and Altererythrobacter were reported to degrade PAHs, chloronitrobenzene, pesticides and petroleum, which contributed to the degradation of petrochemical wastewater. PMID:26031089

  18. COPPER AMINE OXIDASE1 (CuAO1) of Arabidopsis thaliana contributes to abscisic acid- and polyamine-induced nitric oxide biosynthesis and abscisic acid signal transduction.

    PubMed

    Wimalasekera, Rinukshi; Villar, Corina; Begum, Tahmina; Scherer, Günther F E

    2011-07-01

    Polyamines (PA), polyamine oxidases, copper amine oxidases, and nitric oxide (NO) play important roles in physiology and stress responses in plants. NO biosynthesis as a result of catabolism of PA by polyamine oxidases and copper amine oxidases may explain in part PA-mediated responses. Involvement of a copper amine oxidase gene, COPPER AMINE OXIDASE1 (CuAO1), of Arabidopsis was tested for its role in stress responses using the knockouts cuao1-1 and cuao1-2. PA-induced and ABA-induced NO production investigated by fluorometry and fluorescence microscopy showed that the cuao1-1 and cuao1-2 are impaired in NO production, suggesting a function of CuAO1 in PA and ABA-mediated NO production. Furthermore, we found a PA-dependent increase in protein S-nitrosylation. The addition of PA and ABA also resulted in H(2)O(2) increases. cuao1-1 and cuao1-2 showed less sensitivity to exogenous ABA supplementation during germination, seedling establishment, and root growth inhibition as compared to wild-type. In response to ABA treatment, expression levels of the stress-responsive genes RD29A and ADH1 were significantly lower in the knockouts. These observations characterize cuao1-1 and cuao1-2 as ABA-insensitive mutants. Taken together, our findings extend the ABA signal transduction network to include CuAO1 as one potential contributor to enhanced NO production by ABA. PMID:21471330

  19. Stability of volar locking plate systems for AO type C3 fractures of the distal radius: biomechanical study in a cadaveric model

    Microsoft Academic Search

    Shuzo Kamei; Denju Osada; Kazuya Tamai; Nakayuki Kato; Morimitsu Takai; Masahiro Kameda; Yutaka Nohara

    2010-01-01

    Background  The purpose of the present study was to compare the relative stability of five volar locking plates (all of which are available\\u000a for the treatment of intraarticular fractures of the distal radius) under loading conditions simulating the physiological\\u000a forces that occur during early active mobilization.\\u000a \\u000a \\u000a \\u000a \\u000a Methods  Five plating techniques were applied to surgically simulated AO type C3.2 distal radius fractures in

  20. XXX SIMP OSIO BRASILEIRO DE TELECOMUNICAC ~OES -SBrT'12, 13-16 DE SETEMBRO DE 2012, BRASILIA, DF Codificac~ao de Video H.264/AVC em Tempo Real e

    E-print Network

    de Queiroz, Ricardo L.

    XXX SIMP ´OSIO BRASILEIRO DE TELECOMUNICAC¸ ~OES - SBrT'12, 13-16 DE SETEMBRO DE 2012, BRAS´ILIA, DF Codificac¸~ao de V´ideo H.264/AVC em Tempo Real e Restrita por Energia Tiago A. da Fonseca e Ricardo L. de Queiroz+ Resumo-- Comunicac¸~oes de v´ideo t^em demandado poder de computac¸~ao cada vez

  1. An Extreme-AO Search for Giant Planets around a White Dwarf --VLT/SPHERE performance on a faint target GD 50

    E-print Network

    Xu, S; Wahhaj, Z; Milli, J; Scicluna, P; Bertrang, G H -M

    2015-01-01

    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 mags at 0{\\farcs}2, 0{\\farcs}4 and 0{\\farcs}6 and beyond, respectively. We exclude any substellar objects more massive than 4.0 M$_\\textrm{J}$ at 6.2 AU, 2.9 M$_\\textrm{J}$ at 12.4 AU and 2.8 M$_\\textrm{J}$ at 18.6 AU and beyond. This is the ...

  2. 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. [Steward Observatory, University of Arizona, Tucson, AZ 85721 (United States); Puglisi, A.; Esposito, S.; Riccardi, A.; Pinna, E.; Xompero, M.; Briguglio, R. [INAF-Osservatorio Astrofisico di Arcetri, I-50125, Firenze (Italy); Uomoto, A; Hare, T., E-mail: lclose@as.arizona.edu [Carnegie Observatories, 813 Santa Barbara Street, Pasadena, CA 91101 (United States)

    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.

  3. NEARLY PERIODIC FLUCTUATIONS IN THE LONG-TERM X-RAY LIGHT CURVES OF THE BLAZARS AO 0235+164 AND 1ES 2321+419

    SciTech Connect

    Rani, Bindu; Gupta, Alok C. [Aryabhatta Research Institute of Observational Sciences (ARIES), Manora Peak, Nainital 263129 (India); Wiita, Paul J. [School of Natural Sciences, Institute for Advanced Study, Princeton, NJ 08540 (United States)], E-mail: bindu@aries.res.in, E-mail: acgupta30@gmail.com, E-mail: wiita@chara.gsu.edu

    2009-05-10

    We have performed a structure function analysis of the Rossi X-Ray Timing Explorer All-Sky Monitor data to search for variability in 24 blazars using data trains that each exceed 12 yr. Although 20 of them show nominal periods through this technique, the great majority of these 'periods' are clearly related to yearly variations arising from the instrument. Nonetheless, an apparently real periodic component of about 17 days was detected for the blazar AO 0235+164 and it was confirmed by discrete correlation function and periodogram analyses. For 1ES 2321+419, a component of variability with a near periodicity of about 420 days was detected by all of these methods. We discuss several possible explanations for these nearly periodic components and conclude that they most likely arise from the intersections of a shock propagating down a relativistic jet that possesses a helical structure.

  4. Levels, composition profiles and sources of polycyclic aromatic hydrocarbons in surface sediments from Nan'ao Island, a representative mariculture base in South China.

    PubMed

    Gu, Yang-Guang; Lin, Qin; Lu, Teng-Teng; Ke, Chang-Liang; Sun, Run-Xia; Du, Fei-Yan

    2013-10-15

    Levels, composition profiles and sources of 16 polycyclic aromatic hydrocarbons (PAHs) in surface sediments from Nan'ao Island, one of the largest mariculture bases in South China were investigated. The total PAHs concentrations ranged from 265.49 to 951.27 ng/g (dry weight) with a mean of 515.90 ng/g, and seven possible carcinogenic PAHs accounted for 76.94% of total PAHs. Among various mariculture sections, the highest PAHs level was found in the large seaweed culture; while the lowest concentration was detected in the abandoned culture. The composition of PAHs was characterized by low molecular weight PAHs, and Phe Ant and Pyr were the dominant constituent. PAHs may be mainly originated from petroleum and combustion of biomass and coal. Risk assessments suggested that the probability of adverse effect was lower than 25% and PAHs exposure was moderately carcinogenic. PMID:23941805

  5. 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

  6. 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...

  7. 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.

  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. FP6 ELT Design Study WP 9400: Novel AO Concepts for ELT W. Gaessler1, E. Diolaiti2, G. Love3,T. Butterley3, A. Goncharov4, S. Goodsell3, S. Kellner1,

    E-print Network

    Ribak, Erez

    will strongly depend on Adaptive Optics (AO) to employ its full diffraction limited capability, but current, Virtual Wavefront Sensor, Variable Wavefront sensor, FP6 1. INTRODUCTION Most of the current 4m to 10m to investigate new wavefront sensor concepts for such a telescope. The rational behind is that an ELT

  10. Anais do XXX Congresso da Sociedade Brasileira de Computac~ao, X Workshop de Informatica Medica, Belo Horizonte, MG, 20-23 de julho de 2010, ISSN 2175-2761

    E-print Network

    Baranauskas, José Augusto

    Anais do XXX Congresso da Sociedade Brasileira de Computac¸~ao, X Workshop de Inform´atica M´edica´atica M´edica, Belo Horizonte, MG, 20-23 de julho de 2010, ISSN 2175-2761 Gamberger et al. 2004, Molla et

  11. Constru»c~ao de conceitos de f¶‡sica moderna e sobre a natureza da ci^encia com o suporte da hiperm¶‡dia (Construction of concepts of modern physics and on the nature of science with the support of hypermedia)

    Microsoft Academic Search

    D. I. Machado; R. Nardi

    Apresentam-se os resultados de uma pesquisa sobre a constru»c~ao de conceitos de F¶‡sica Moderna e sobre a natureza da Ci^encia com o apoio da hiperm¶‡dia, que envolveu a produ»c~ao e avalia»c~ao de um software edu- cacional. A proposta didatica fundamentou-se na Teoria da Aprendizagem de Ausubel, em orienta»c~oes para a implementa»c~ao de sistemas hiperm¶‡dia educacionais e em abordagens derivadas da

  12. 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

  13. 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.

  14. A measurement of the systematic astrometric error in GeMS and the short-term astrometric precision in ShaneAO

    NASA Astrophysics Data System (ADS)

    Ammons, S. M.; Neichel, Benoit; Lu, Jessica; Gavel, Donald T.; Srinath, Srikar; McGurk, Rosalie; Rudy, Alex; Rockosi, Connie; Marois, Christian; Macintosh, Bruce; Savransky, Dmitry; Galicher, Raphael; Bendek, Eduardo; Guyon, Olivier; Marin, Eduardo; Garrel, Vincent; Sivo, Gaetano

    2014-08-01

    We measure the long-term systematic component of the astrometric error in the GeMS MCAO system as a function of field radius and Ks magnitude. The experiment uses two epochs of observations of NGC 1851 separated by one month. The systematic component is estimated for each of three field of view cases (15'' radius, 30'' radius, and full field) and each of three distortion correction schemes: 8 DOF/chip + local distortion correction (LDC), 8 DOF/chip with no LDC, and 4 DOF/chip with no LDC. For bright, unsaturated stars with 13 < Ks < 16, the systematic component is < 0.2, 0.3, and 0.4 mas, respectively, for the 15'' radius, 30'' radius, and full field cases, provided that an 8 DOF/chip distortion correction with LDC (for the full-field case) is used to correct distortions. An 8 DOF/chip distortion-correction model always outperforms a 4 DOF/chip model, at all field positions and magnitudes and for all field-of-view cases, indicating the presence of high-order distortion changes. Given the order of the models needed to correct these distortions (~8 DOF/chip or 32 degrees of freedom total), it is expected that at least 25 stars per square arcminute would be needed to keep systematic errors at less than 0.3 milliarcseconds for multi-year programs. We also estimate the short-term astrometric precision of the newly upgraded Shane AO system with undithered M92 observations. Using a 6-parameter linear transformation to register images, the system delivers ~0.3 mas astrometric error over short-term observations of 2-3 minutes.

  15. Analysis of LDEF experiment AO187-2 chemical and isotopic measurements of micrometeoroids by secondary ion mass spectrometry. Final report

    SciTech Connect

    Zinner, E.

    1995-11-01

    Experiment AO187-2, that was flown on board the Long Duration Exposure Facility (LDEF), was designed to measure the chemical and isotopic compositions of interplanetary dust impinging on the spacecraft from outer space. Information on the nature and composition of orbital debris was also anticipated. The spacecraft maintained a constant orientation with respect to its velocity vector thereby defining leading and trailing edges that faced respectively into and away from the direction of motion. Arrays of individual capture cells each 80.8 sq cm in size and totaling 237 in number were exposed on both the leading and trailing edges of LDEF. Each cell consisted of a pure Ge target surface slightly separated from a thin (2.5 micrometers) metallized plastic `entrance foil.` The basic concept was that incoming projectiles would penetrate the foil, strike the Ge target plate at high velocity producing a vapor-liquid cloud that would re-deposit material on the underside of the plastic foil. This material would then be analyzed using the sensitive surface analysis technique of Secondary Ion Mass Spectrometry (SIMS). In practice, most of the plastic entrance foils failed during the extended period of orbital exposure probably due to a combination of UV embrittlement, large densities of impact events and (for the leading edge) the effects of atomic oxygen erosion in orbit. However the foils failed gradually and most remained in place on the capture cells for a significant fraction of the duration of the flight. Because most of the impactors were small (less than 10 micrometers) they were heated and dispersed in traversing the entrance foils producing clouds of molten droplets and vapor that produced easily identifiable `extended impacts` on the Ge target plates.

  16. 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

  17. 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.

    COMPARISON OF TRAP STATES BETWEEN CIGSS/CdS/ZnO AND Cd PE CIGSS/ZnO CELLS P.K. Johnson, A.O. Pudov to current transport in CIGSS-based cells. These cells have p-n junctions formed by either chemical-bath cost. The best photovoltaic junctions are produced when a thin CdS layer is deposited by chemical-bath

  18. Study of the dependence of spin-orbit matrix elements on AO basis set composition for inner and valence shells: Results for the multiplet splitting of X 3? - and C 3? of SO and X 2? in SO +

    NASA Astrophysics Data System (ADS)

    Klotz, Rainer; Marian, Christel M.; Peyerimhoff, Sigrid D.; Hess, Bernd A.; Buenker, Robert J.

    1983-05-01

    The zero-field splitting for the X 3? - ground state of SO is calculated in various AO basis sets employing MRD CI wavefunctions and second-order perturbation theory. It is found that the spin-orbit matrix elements which couple various excited states with X 3? - are relatively stable as long as AO basis sets of roughly double-zeta quality are employed: considerable deviations appear if smaller AO basis sets are used. An analysis of the various contributions to the matrix element on the MO level demonstrates that the quality of the spin-orbit element is essentially governed by the flexibility with which the valence-shell MOs are described. Since little dependence on inner shells is noted, the concept of frozen-core CI calculations as normally used in electronic structure calculations can be carried over to the determination of spin-dependent properties. An analysis with respect to the convergence of the second-order perturbation sum as well as comparisons between MRD CI wavefunctions and single-configuration states in evaluating spin-orbit properties is also made. Calculations for spin-spin splitting in X 3? -, the zero-field splitting of the C 3? states and the X 2? ground state of SO + substantiate the conclusions drawn from the X 3? - state treatment. All calculated values are in excellent agreement with measured data, whenever these are available.

  19. Expression of Cry1Ac in transgenic tobacco plants under the control of a wound-inducible promoter (AoPR1) isolated from Asparagus officinalis to control Heliothis virescens and Manduca sexta.

    PubMed

    Gulbitti-Onarici, Selma; Zaidi, Mohsin Abbas; Taga, Ibrahim; Ozcan, Sebahattin; Altosaar, Illimar

    2009-07-01

    Expression of cry1Ac gene from Bacillus thuringiensis (Bt) was evaluated under the control of a wound-inducible AoPR1 promoter from Asparagus officinalis in transgenic tobacco plants. The leaves of transgenic plants were mechanically wounded to evaluate the activity of the AoPR1 promoter in driving the expression of Cry1Ac protein at the wound site. Our results indicate that mechanical wounding of transgenic plants was effective in inducing the expression of Cry1Ac protein. As a result of this induction, the accumulated levels of Cry1Ac protein increased during 6-72 h post-wounding period. The leaves of transgenic tobacco plants were evaluated for resistance against Heliothis virescens and Manduca sexta in insect bioassays in two different ways. The detached tobacco leaves were either fed directly to the insect larvae or they were first mechanically wounded followed by a 72 h post-wounding feeding period. Complete protection of mechanically wounded leaves of transgenic plants was observed within 24 h of the bioassay. The leaves of transgenic plants fed directly (without pre-wounding) to the larvae achieved the same level of protection between 24 and 72 h of the bioassay. PMID:19353306

  20. EVALUACIÓN DE DOS GENERACIONES DE HÍBRIDOS Y PROGENITORES DE SORGO TOLERANTES AL FRÍO. I: VARIABILIDAD GENÉTICA Y ADAPTABILIDAD EVALUATION OF TWO GENERATIONS OF COLD TOLERANT SORGHUM HYBRIDS AND PARENTAL LINES. I: GENETIC VARIABILITY AND ADAPTABILITY

    Microsoft Academic Search

    Humberto León-Velasco; Leopoldo E. Mendoza-Onofre; Fernando Castillo-González; Tarcicio Cervantes-Santana; Ángel Martínez-Garza

    2009-01-01

    In 1990, the first generation of cold tolerant experimental sorghum (Sorghum bicolor (L.) Moench) hybrids adapted to the Mexican High Central Valleys was evaluated, and in 1995, the second generation of hybrids was developed, with new B- and R- lines. With the purpose of evaluating genetic variability and adaptability of the two generations of hybrids and parental lines for grain

  1. New Compounds In 3Ti 2AO 10, In 6Ti 6BO 22, and Their Solid Solutions ( A: Al, Cr, Mn, Fe, or Ga; B: Mg, Mn, Co, Ni, Cu, or Zn): Synthesis and Crystal Structures

    NASA Astrophysics Data System (ADS)

    Brown, Francisco; Kimizuka, Noboru; Michiue, Yuichi; Mohri, Takahiko; Nakamura, Masaki; Orita, Masahiro; Morita, Kiyoshi

    1999-11-01

    New compounds, In3Ti2AO10 (A: Al, Cr, Mn, Fe, or Ga) and In6Ti6BO22 (B: Mg, Mn, Co, Ni, Cu, or Zn) were synthesized at and above 1000°C in air through solid-state reactions among the constituent cation oxide powders. They are isostructural with the monoclinic and/or orthorhombic In3Ti2FeO10 having a pyrochlore-related crystal structure with a commensurate or incommensurate modulated structure. The high-temperature phase is orthorhombic, and the low-temperature phase is monoclinic. The lattice constants of In3Ti2AO10 are as follows: In3Ti2AlO10 (1200°C): a(Å)=5.833(2), b(Å)=3.371(2), and c(Å)=12.060(6); In3Ti2AlO10 (1100°C): a(Å)=5.8368(7), b(Å)=3.3721(4), c(Å)=6.3402(8), and ?(°)=107.87(1); In3Ti2CrO10 (1200°C): a(Å)=5.9246(8), b(Å)=3.3562(5), c(Å)=6.3546(9), and ?(°)=108.10(1); In3Ti2GaO10 (1200°C): a(Å)=5.861(2), b(Å)=3.385(1), and c(Å)=12.094(4); In3Ti2GaO10 (1000°C): a(Å)=5.8742(9), b(Å)=3.3828(5), c(Å)=6.353(1), and ?(°)=107.87(1). In3Ti2AlO10 and In3Ti2GaO10 are polymorphic. The lattice constants of In6Ti6BO22 are as follows: In6Ti6MgO22 (1200°C): a(Å)=5.9236(7), b(Å)=3.3862(4), c(Å)=6.3609(7), and ?(°)=108.15(1); In6Ti6MnO22 (1200°C): a(Å)=5.9361(9), b(Å)=3.4031(5), c(Å)=6.3435(10), and ?(°)=108.26(1); In6Ti6CoO22 (1200°C): a(Å)=5.9243(5), b(Å)=3.3841(3), c(Å)=6.3495(6), and ?(°)=108.18(1); In6Ti6NiO22 (1200°C): a(Å)=5.9191(6), b(Å)=3.3729(3), c(Å)=6.3568(6), and ?(°)=108.13(1); In6Ti6CuO22 (1000°C): a(Å)=5.916(2), b(Å)=3.379(1), and c(Å)=12.029(4); In6Ti6ZnO22 (1200°C): a(Å)=5.9223(6), b(Å)=3.3830(3), c(Å)=6.3576(6), and ?(°)=108.16(1). In6Ti6BO22 (B: Mg, Mn, Co, Ni, or Zn) are monoclinic and In6Ti6CuO22 is orthorhombic. Solid solutions were synthesized in between In3Ti2AO10 (A: Al, Cr, Mn, Fe, or Ga) and In6Ti6BO22 (B: Mg, Mn, Co, Ni, Cu or Zn), and their lattice constants were determined. Temperature in the parenthesis means synthesis temperature, and all the lattice constants were measured at room temperature. The relationship between the unit cells of In3Ti2AO10, In6Ti6BO22, their solid solutions, and the constituent cation elements of A and B are discussed in terms of their tendency for site preference.

  2. 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

  3. AO Brief Sept 2012 Mary Aguilar

    E-print Network

    is finding problems with this area · Used when non-government activity funds travel · Ethics Official are allowed to use government airline fares · This does not pertain to non-NPS foreign military ­ MIPR funds of Travel ­ Purpose of Travel ­ Estimated cost #12;FY13 Contract City Pair Fares · 21 contracts vice 18

  4. Inflection in the Ao dialect of Yoruba

    E-print Network

    Taiwo, Oye

    2011-10-03

    long pronouns while those in (5) are third person long pronouns. These pronouns inflect for person. (6) a. mo máa ra mótò tuntun. I FUT buy car new ‘I will buy a new car’. b. mi ò ní... sentences. In other words, it inflects for negation. In the sentences in (11) below, the form of the future tense marker is á/yóò/máa in an affirmative sentence while it is ní in a negative sentence. (11) a. ?m? náà á/yóò/máa l? ní...

  5. ao~~~- a~ c5

    Center for Drug Evaluation (CDER)

    ... V1,>-1k 5~181: OcxIC+ 2e,-rb-1- N -c)Z--~~2 P-1 N f~l 1 U ' / ff ~~ f4!)V200 .:• PM I T ~ ' .., ry o~'~~~ i~~ . , v 1~G~~s~Q cA ^--T-1, Ii -FD M ...

  6. AO DAS A BONIFICAR 1975 -1989 30

    E-print Network

    Vásquez, Carlos

    de Capital Humano, estando presente: la Lic. Mailen Jiménez, por la Dirección de Gestión de Capital Humano, el Lic. Hernán Godoy, el Lic. Gabriel Rojas por el de Dpto. de Registro y Ordenamiento de Pago

  7. 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 concentrations to be inferred. 1 Introduction Aerosol research is a very active field, with particular bearing], and Pusechel at al [3], employed NASA ER-2 and DC-8 research aircraft mounted sampling devices. These aircraft

  8. Ao XI, N3 / 2002 Septiembre -Diciembre

    E-print Network

    Espigares, Tíscar

    floración otoñal, endémico del sur de la Península Ibérica y Norte de África (Argelia y Marruecos). En suelo #12;Año XI, Nº3 / 2002 Septiembre - Diciembre arcilloso. Ambas poblaciones se encuentran dentro de

  9. 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

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

    E-print Network

    Song, Siang Wun

    menor que 0.5mm, sem bateria, dotado de um pequeno r´adio-transponder e mem´oria para armazenar um n´umero de 128 bits. Um sinal de r´adio externo alimenta o chip que transmite o n´umero armazenado. Ficou

  11. LGS AO photon return simulations and laser requirements for the Gemini LGS AO program

    E-print Network

    as the Doppler and hyperfine broadening of the sodium D2 line, the sodium column density, atmospheric parameters: Laser Guide Star Adaptive Optics, photon return, sodium/laser interaction efficiency, laser power approval. All three LGS systems rely on the excitation of mesospheric sodium atoms to create the artificial

  12. The calibration of photographic and spectroscopic films: The response of 2aO film to small dosages of alpha particles from 3/10th's rad to 8 rads at energy levels 153 MeV, 79 MeV and 47 MeV

    NASA Technical Reports Server (NTRS)

    Hammond, E. C., Jr.; Peters, Kevin; Stober, AL

    1984-01-01

    The 2aO film, pre-exposed to a series of neutral density filters which on development under standard conditions will produce the standard H-D curve for that film, were then exposed to Alpha paricles with a dose range of 3/10ths rads to 8 rads while varying the energy of the particles using 153 MeV, 70 MeV, and 47 MeV, respectively. An analysis of the film shows that the 3/10th rad dose produces the lowest optical density changes at 70 MeV and 47 MeV. While the optical density readings for the darker patterns seem to oscillate and decrease when exposed to radiation dosages of 3/10th rads to 8 rads.

  13. Diterpene resin acid biosynthesis in loblolly pine (Pinus taeda): functional characterization of abietadiene/levopimaradiene synthase (PtTPS-LAS) cDNA and subcellular targeting of PtTPS-LAS and abietadienol/abietadienal oxidase (PtAO, CYP720B1).

    PubMed

    Ro, Dae-Kyun; Bohlmann, Jörg

    2006-08-01

    Diterpene resin acids are prominent defense compounds against insect pests and pathogens in conifers. Biochemical and molecular analyses in grand fir (Abies grandis), Norway spruce (Picea abies), and loblolly pine (Pinus taeda) have identified two classes of genes and enzymes that generate much of the structural diversity of terpenoid defense compounds: The terpenoid synthases (TPS) and cytochrome P450 monooxgenases (P450). Using a single substrate, geranylgeranyl diphosphate, families of single-product and multi-product diterpene synthases generate an array of cyclic diterpene olefins. These diterpenes are converted to diterpene resin acids by activity of one or more P450 enzymes. A few conifer diterpene synthases have previously been cloned and characterized in grand fir and in Norway spruce. We have also previously shown that the loblolly pine P450 abietadienol/abietadienal oxidase (PtAO) catalyzes multiple oxidations of several diterpene alcohols and aldehydes. Conifer diterpene synthases are thought to function in plastids while P450s can also be localized to plastids or to the endoplasmic reticulum (ER). Here, we show that a loblolly pine cDNA (PtTPS-LAS) encodes a typical multi-product conifer diterpene synthase that forms levopimaradiene, abietadiene, palustradiene, and neoabietadiene similar to the grand fir abietadiene synthase and Norway spruce levopimaradiene/abietadiene synthase. Subcellular targeting of PtTPS-LAS and PtAO to plastids and ER, respectively, was shown with green fluorescent fusion protein expression in tobacco cells. These data suggest that enzymes for conifer diterpene resin acid biosynthesis are localized to at least two different subcellular compartments, plastids and ER, requiring efficient transport of intermediates and secretion of diterpene resin acids into the extracelluar space. PMID:16497345

  14. Crime e ideologia: do Terceiro Reich ao assassinato de Moisés

    Microsoft Academic Search

    Verônica Martinelli

    2005-01-01

    Crime and ideology: from the Third Reich to the mur- der of Moses. This article refers to the conditions that make homi- cide morally acceptable as an instrument for social restoration. It also considers the way certain groups that legitimate evil and crime work. In order to reach these goals, it resorts to the model that Na- zism provides. The

  15. Measuring Geosynchronous Satellites from Stellar Appulses with AO

    NASA Astrophysics Data System (ADS)

    Drummond, J.; Reynolds, O.; Buckman, M.; Johnson, R.

    2014-09-01

    Despite the high relative speed between a geosynchronous satellite and passing background stars, we have made high precision positional measurements against faint stars in 20 ms exposures over a small field. In addition, we have obtained I and J magnitudes of these objects with differential photometry even through clouds. Examples will be shown.

  16. aula pratica: (Laboratorio) Deduc~ao natural em Isabelle

    E-print Network

    Lisboa, Universidade Técnica de

    > result(); val it = "[| ?A ==> ?B; ?A |] ==> ?B" : Thm.thm Use esta ideia agora para derivar: 1. Np R agora o back: > ba 1; Level 2 (1 subgoal) ([| (A-->C); (B-->C); B |] ==> C) 1. ([| (A-->C); (B-->C); B! val it = () : unit Use agora as ideias anteriores para derivar: 1. y(xQ(x, y)) Nc x(yQ(x, y)) 2. x

  17. ALTAIR/NIRI AO Imaging of Volcanic Eruptions on Io

    NASA Astrophysics Data System (ADS)

    de Pater, Imke; Trujillo, Chad; McGregor, Alistair; Adamkovics, Mate; Marchis, Franck; Hammel, Heidi; Davies, Ashley; Lopes, Rosaly; Williams, David; Leone, Giovanni; Wong, Michael; Matson, Dennis; Spencer, John; Vermeersen, Bert

    2011-08-01

    We propose to observe Io at 1-5 ?m on 8 nights in 2011B (every 45 deg in ionian longitude). This will take 1 hr per night. The J, H, K, L observations will be with ALTAIR/NIRI, the M observations with NIRI alone. These data will form part of a database characterizing Io?s volcanic activity, information that is crucial to gain a better understanding of the geophysics of this satellite. A first successful set of data was obtained in 2010B.

  18. ALTAIR/NIRI AO Imaging of Volcanic Eruptions on Io

    NASA Astrophysics Data System (ADS)

    de Pater, Imke; Trujillo, Chad; Marchis, Franck; Hammel, Heidi; Davies, Ashley; Williams, David; Leone, Giovanni; Wong, Mike; Adamkovics, Mate; Lopes, Rosaly; Matson, Dennis; Spencer, John

    2010-08-01

    We propose to observe Io at 1-5 micron on 8 nights in the 2010B semester (every 45 deg in ionian longitude). This will take 1 hr per night. The (narrowband) J, H, K, L observations will be with ALTAIR/NIRI, the M observations with NIRI alone. These data will form part of a database characterizing Io's volcanic activity, information that is crucial to gain a better understanding of the geophysics of this satellite.

  19. Subaru AO Coronagraphic and Direct Imaging of YSOs

    Microsoft Academic Search

    M. Tamura; M. Fukagawa; M. Hayashi

    2004-01-01

    A cold near-infrared stellar coronagraph combined with adaptive optics (CIAO) is introduced. As an open-use instrument on the Subaru 8.2-m telescope, it has been used for several star formation studies with high spatial resolutions (from natural seeing of about 0.6 arcsec down to 0.07 arcsec with adaptive optics). A brief explanation is described of the instrument as well as its

  20. PROJETO: INTEGRAO DE ALUNOS ESTRANGEIROS Ao ACOLHER ACOLHIMENTO DE ALUNOS

    E-print Network

    Paraná, Universidade Federal do

    TEMPO ­ #12;ACOLHER 1. Dados Pessoais Nome completo Sexo Data de nascimento Endereço residencial: Sexo Nacionalidade 5. Disponibilidade para o programa? Finais de #12;semana Feriados Período de férias

  1. MAC 412 Organizac~ao de Computadores Agosto de 2005

    E-print Network

    Song, Siang Wun

    processadores (como o Mark I) tinham ciclos da ordem de 0.5 segundos · Processador hoje: v´arios GHz - menos de · (pode chegar a 113.072 processadores) · LINPACK: 136,8 TFLOPS · Velocidade pico: 183,5 TFLOPS · Velocidade pico: 183,5 TFLOPS · Tecnologia CMOS de 0,25 micron Em novembro/2005 sai uma nova TOP500 e tudo

  2. Towards Tool-supported Update of Pointcuts in AO Refactoring

    Microsoft Academic Search

    Jan Wloka; Fraunhofer First

    Abstract Aspect-oriented programming,(AOP) is often intro- duced as an extension to a programming,language. The new modularization mechanisms are provided by new language constructs, such as the pointcut and the advice. Pointcuts specify where and when an advice is executed and thereby refer to other program elements and structures to express the execution conditions. During the evolution of a program these

  3. instructions i 52-1308-00 Edition AO

    E-print Network

    Lebendiker, Mario

    Desalting column characteristics. Matrix Sephadex G-25 Medium Particle size range 85­260µm Bed volume: 8 filter may occur. This does not affect the performance of the column. Fig 1. Removal of NaCl from albumin albumin (25 mg) dissolved in 2.5 ml 0.5M NaCl solution. A total of 23.8 mg albumin was recovered in 3.5 ml

  4. O DIREITO À EDUCAÇÃO FÍSICA E AO ESPORTE

    Microsoft Academic Search

    Manoel Tubino

    2005-01-01

    The right for physical education and sport The objective of the present study is to bring up the discussion about Rights and the History of Humanities to physical education and sports practice. The issue human rights had its beginning during French Revolution (1789) and It was consolidated with the Human Right Declaration (1948) made by the United Nation Organization (ONU).

  5. AO imaging and infrared spectroscopy of exoplanet host stars

    NASA Astrophysics Data System (ADS)

    Skillen, I.; Pollacco, D.

    2013-05-01

    The telescopes of the ORM, La Palma have gained a worldwide reputation in the discovery and characterisation of exoplanets, which demonstrates the powerful synergy that exists between small, mid-size and large facilities such as SuperWASP, the WHT and GTC, in this rapidly evolving field. We outline a WHT programme of near-infrared adaptive optics imaging with NAOMI/INGRID, and near-infrared spectroscopy with LIRIS, of exoplanet host stars to search for associated stellar and brown dwarf companions.

  6. OK8a.o o o I?. Permeability, Porosity,

    E-print Network

    of Chalk Samples from Erslev, Mors, Denmark Lars Carlsen, Walther Batsberg, Bror Skytte Jensen, and Peter, POROSITY, DISPERSION1 -, DIFFUSION-, AND SORPTION CHARACTERISTICS OF CHALK SAMPLES FROM ERSLEV, MORS. A series of chalk samples from the cretaceous forma- tion overlying the Erslev «;alt dome have been studied

  7. Spectral Domain Optical Coherence Tomography for Glaucoma (An AOS Thesis)

    PubMed Central

    Schuman, Joel S.

    2008-01-01

    Purpose Optical coherence tomography (OCT) is a rapidly evolving, robust technology that has profoundly changed the practice of ophthalmology. Spectral domain OCT (SD-OCT) increases axial resolution 2- to 3-fold and scan speed 60- to 110-fold vs time domain OCT (TD-OCT). SD-OCT enables novel scanning, denser sampling, and 3-dimensional imaging. This thesis tests my hypothesis that SD-OCT improves reproducibility, sensitivity, and specificity for glaucoma detection. Methods OCT progress is reviewed from invention onward, and future development is discussed. To test the hypothesis, TD-OCT and SD-OCT reproducibility and glaucoma discrimination are evaluated. Forty-one eyes of 21 subjects (SD-OCT) and 21 eyes of 21 subjects (TD-OCT) are studied to test retinal nerve fiber layer (RNFL) thickness measurement reproducibility. Forty eyes of 20 subjects (SD-OCT) and 21 eyes of 21 subjects (TD-OCT) are investigated to test macular parameter reproducibility. For both TD-OCT and SD-OCT, 83 eyes of 83 subjects are assessed to evaluate RNFL thickness and 74 eyes of 74 subjects to evaluate macular glaucoma discrimination. Results Compared to conventional TD-OCT, SD-OCT had statistically significantly better reproducibility in most sectoral macular thickness and peripapillary RNFL sectoral measurements. There was no statistically significant difference in overall mean macular or RNFL reproducibility, or between TD-OCT and SD-OCT glaucoma discrimination. Surprisingly, TD-OCT macular RNFL thickness showed glaucoma discrimination superior to SD-OCT. Conclusions At its current development state, SD-OCT shows better reproducibility than TD-OCT, but glaucoma discrimination is similar for TD-OCT and SD-OCT. Technological improvements are likely to enhance SD-OCT reproducibility, sensitivity, specificity, and utility, but these will require additional development. PMID:19277249

  8. AO DE MODELOS DE SISTEMAS CONTINUOS VIA DESIGUALDADES

    Microsoft Academic Search

    MATRICIAIS LINEARES; J. C. Geromel; R. G. Egas; F. R. R. Kawaoka

    In this paper, model reduction of continuous time linear systems is revisited. The main objective is to define a convex programming problem expressed in terms of linear matrix inequalities which provides a good suboptimal solution to the model reduction problem. The quality of the proposed suboptimal solution is assessed through comparisons, performed via simulation, with the already classical balanced truncation

  9. Ingeniera en Sistemas de Computacin PRIMER AO PRIMER CUATRIMESTRE

    E-print Network

    Maguitman, Ana Gabriela

    Programación 5946 Simulación Modelos Estadísticos para Ciencias de la Computación Sistemas Operativos ModelosIngeniería en Sistemas de Computación Plan 2007 PRIMER AÑO PRIMER CUATRIMESTRE Correlatividad para Formales y Autómatas Lenguajes Formales y Autómatas 7820 Modelos Estadísticos para Ciencias de la

  10. AO DE MODELOS DE SISTEMAS DISCRETOS VIA DESIGUALDADES MATRICIAIS LINEARES

    Microsoft Academic Search

    J. C. Geromel; F. R. R. Kawaoka; R. G. Egas

    In this paper, model reduction of discrete time linear systems is revisited. The main objective is to define a convex programming problem expressed in terms of linear matrix inequalities (LMIs) which provides a good suboptimal solution to the model reduction problem. The quality of the proposed suboptimal solution is assessed through comparisons, performed via simulation, with the already classical balanced

  11. RELAO DOS CANDIDATOS CLASSIFICADOS AO MESTRADO/ 2014 ORDEM DE CLASSIFICAO

    E-print Network

    Oliveira de Moura 11 Guilherme Samprogna Mohor 12 Cláudio Montalvão Rodrigues 13 Wendell Max Barbosa Fialho 14 Flavio Augusto Farias D'Oliveira 15 Ingrid Monteiro Peixoto de Souza 16 Paulo Mauricio Moura de

  12. 30 ao^ut 2012 Differential imaging in heterogeneous media

    E-print Network

    optimization, local 2 Error minimization (Tarantola-Valette) Compressive sensing algorithms (OM, PPPA,...) V , 2008) Travel time change - Tarantola-Valette algorithm Ballistic wave propagation Tarantola

  13. AGENDA PBLICA AO VII, N 12, Diciembre 2008-Enero 2009

    E-print Network

    Rapaport, Iván

    características propias del desarrollo político y administrativo de cada país. (Sánchez, 2008). Este nuevo la elección pública. (Letelier, 2004), el proceso de globalización en sus vertientes económica

  14. AGENDA PBLICA AO VII, N 12, Diciembre 2008-Enero 2009

    E-print Network

    Rapaport, Iván

    seriamente en nuevos períodos de cambio administrativo. Diego Barría Traverso realiza su tesis doctoral Estatuto Docente. A continuación se presentan tres ejemplos de procesos de reforma del Estado2 , especialmente del ámbito administrativo, ocurridos desde finales del siglo XIX, en adelante. Con ellos se

  15. AGENDA PBLICA AO VII, N 12, Diciembre 2008-Enero 2009

    E-print Network

    Rapaport, Iván

    aumento de las complejidades sociales, los problemas públicos, progresivamente, exigen una visión más problemas sociales. Existe abundante evidencia que refleja esta necesidad en diversos ámbitos de la política variables tan disímiles como la educación, la calidad de las viviendas, el ingreso promedio, la conformación

  16. An AO* Algorithm for Planning with Continuous Resources Emmanuel Benazera

    E-print Network

    Mausam

    to visit a single rock, but in future mis- sions, multiple rock visits in a single communication cycle goal (e.g., photographing some interesting rock). The rover attempts to carry this out, and, when done

  17. Subaru AO Coronagraphic and Direct Imaging of YSOs

    NASA Astrophysics Data System (ADS)

    Tamura, M.; Fukagawa, M.; Hayashi, M.; Sdps/Ciao Teams

    2004-09-01

    A cold near-infrared stellar coronagraph combined with adaptive optics (CIAO) is introduced. As an open-use instrument on the Subaru 8.2-m telescope, it has been used for several star formation studies with high spatial resolutions (from natural seeing of about 0.6 arcsec down to 0.07 arcsec with adaptive optics). A brief explanation is described of the instrument as well as its current main project of systematic surveys of disks and young companions around T Tauri stars and Herbig Ae/Be stars. In particular, observations of HL Tau are presented in some details. Our images of HL Tau show several new circumstellar features including the presence of a red H-K color region of ~150 AU, probably corresponding to the small circumstellar disk. The observations of a high density stellar cluster of MWC 137 are also reported. It appears to be a cluster of very low-mass stars around Herbig Be star or a cluster of B stars around a supergiant.

  18. Câncer de mama e sofrimento psicológico: aspectos relacionados ao feminino

    Microsoft Academic Search

    Lucia Cecilia da Silva

    2008-01-01

    The incidence of breast cancer in Brazil and all over the world has been rising and affected women at an earlier age. Treatment involves mastectomy, chemotherapy and radiotherapy whose side effects might compromise self-esteem, body image and feminine identity of the sick to various degrees. Moreover, in current society, cancer has acquired meanings associated with guilt, punishment, deterioration, pain and

  19. Difficulties of First Years Elementary School Teachers with the Teaching of Astronomy. (Breton Title: Dificuldades de Professores dos Anos Iniciais do Ensino Fundamental em Relação ao Ensino da Astronomia. ) Dificultades de LOS Profesores de los Primeros Años de la Escuela Primaria en Relación a la Enseñanza de la Astronomía

    NASA Astrophysics Data System (ADS)

    Langhi, Rodolfo; Nardi, Roberto

    2005-12-01

    This paper reports Primary School teachers' discourses analysis about their difficulties related to the teaching of Astronomy. It reports partial data of a master's level research carried out in the last two years, named "An exploratory study for inserting Astronomy in primary school teachers' education" (LANGHI, 2004). The study took into consideration students' and teachers' common sense conceptions about astronomical phenomena, conceptual mistakes in textbooks, and Astronomy's suggestions given by the PCN (Parâmetros Curriculares Nacionais – The Brazilian National Curriculum Standards). The paper aims to characterize teachers' difficulties, in order to provide subsides to the implementation of an initial or continuing education program. This study is justified by the fact that courses plans like these only will be adapted to the teacher's (and students') reality, if there is a primary investigation about what the teachers really need to know about Astronomy. This fact was possible here by the enunciations interpretation of a teachers' sample using semi-structured interviews, according to discourse analysis procedures. The research outcomes show difficulties related to factors like: those of personal order, methodological, on teacher's formation, educational infrastructure and other related to information sources for educators. Este artigo, que relata as dificuldades de professores em relação ao ensino da Astronomia, faz parte de um estudo exploratório para a inserção da Astronomia na formação de professores dos anos iniciais do Ensino Fundamental. Esse estudo leva em consideração as concepções alternativas de alunos e professores sobre fenômenos astronômicos, os erros conceituais em livros didáticos e as sugestões de conteúdos de Astronomia constantes nos PCN (Parâmetros Curriculares Nacionais). Caracterizar as dificuldades dos professores é a questão central deste texto, apontando para o objetivo de contribuir com subsídios para um futuro programa de formação continuada neste tema. O estudo se justifica mediante o fato de que planejamentos de cursos como estes só se adequarão à realidade do professor (e do aluno) se houver uma investigação antecipada sobre o que os docentes precisam saber e saber fazer a respeito da Astronomia, o que se concretizou em nosso caso pela interpretação dos discursos de uma amostra de professores coletados através de entrevistas semi-estruturadas, utilizando para interpretação os princípios e métodos da análise do discurso em sua linha francesa. Os resultados da pesquisa indicaram dificuldades de ordem pessoal, metodológica, de formação, de infra-estrutura e outras relacionadas às fontes de informações para docentes. Este artículo que relata las dificultades de los profesores en relación a la enseñanza da laAstronomía es parte de un estudio preliminar para la implantación dela Astrnomía enla formación de profesores de ls primeros años del ciclo primario.El estudio considera las concepciones alternativas de alumnos y profesores respecto a los fenómenos astronómicos, los errores conceptuales en los libros didácticos y las sugerencias de contenidos de Astronomía que constan en los Parámetros Curriculares Nacionales del Brasil. Caracterizar las dificultades de los profesores constituye la cuestión central de este texto, apuntando para el objetivo de contribuir para un futuro programa de educación contínua en este tema. El estudio se justifica mediante el hecho que la planificación de cursos de este tipo solo se adecuarán a la realidade del profesor (y del alumno) si existe una investigación anterior a respecto de lo que los docentes precisan saber y saber realizar en Astronomía, lo cual se concretó en nuestro caso por medio de la interpretación de los discursos de una muestra de profesores obtenidos através de entrevistas semiestructuradas, utilizand para esta interpretación los principios y métodos de análisis del discurso en su línea francesa. Los resultados mostraron dificultades de orden personal, metodológic

  20. Comparative effects of technical-grade and a commercial formulation of glyphosate on the pigment content of periphytic algae.

    PubMed

    Vera, María S; Juárez, Ángela B; Pizarro, Haydée N

    2014-10-01

    We investigated the potentially different effects of one of the most commonly used glyphosate formulations in Argentina, Glifosato Atanor(®), and the technical-grade glyphosate on the pigment content, as biomass indicators of the algal fraction in a freshwater periphytic community. A laboratory bioassay was carried out in 250-ml beakers. Two treatments were used: technical-grade glyphosate acid and Glifosato Atanor(®) (isopropylamine salt of glyphosate 48 % w/v), which were at a concentration of 3 mg active ingredient per liter. Treatments and the control (without herbicide) were replicated in triplicate. The concentrations of chlorophyll a and b and carotenes were determined at 0, 2, 6, 10, 24, 48, 96 and 192 h after herbicide addition. A significant increase in pigment content was observed for both herbicides after a 2-day exposure. Moreover, the formulation had little or no effect compared to the active ingredient, suggesting that the additives of Glifosato Atanor(®) may not enhance glyphosate toxicity. PMID:25129051

  1. ESTIMATIVAS DA AREA DE ATRAC~AO DE SISTEMAS N~AO LINEARES COM INCERTEZAS VARIANTES NO TEMPO POR MEIO DE UMA CLASSE DE

    E-print Network

    Pota, Himanshu Roy

    on the mean value theorem in conjunction to an approximation technique of convex sets to obtain this LDI differential inclusions, linear matrix inequalities Resumo-- Este artigo prop~oe utilizar uma classe particular forma de inclus~oes diferenciais lineares ou LDIs (do ingl^es, linear differential in- clusions), sendo

  2. sid.inpe.br/mtc-m19/2012/08.29.15.46-RPQ IDENTIFICAC~AO DE AREAS DE PRESERVAC~AO

    E-print Network

    Hammerton, James

    Juliana S. dos Santos; Marcos Adami; Alessandro F. Palmeira Andr´e M. S. A. Luz; Claudia D. Alves; Daniela Aguiar Juliana S. dos Santos; Marcos Adami; Alessandro F. Palmeira Andr´e M. S. A. Luz; Claudia D. Alves; Let´icia A. Macedo Madalena N. Pereira; Magog A. Carvalho; M´arcio P. de Mello Marco Aur´elio S

  3. Dissertac~ao para obtenc~ao do grau de Mestre em Matematica pelo INSTITUTO NACIONAL DE MATEMATICA PURA E APLICADA

    E-print Network

    , such as the type of mapping. An example is 3D photography, where the texture comes from images of the object. In this work, we investigate the problem of building and manipulating texture atlases for 3D photography maps that is suited to 3D photography. Projective texture atlas serves as a foundation for an attribute

  4. MAC0122 PROVA DE RECUPERAC ~AO 27/2/2004 1. [2 pontos] Considere a seguinte func~ao de hashing

    E-print Network

    Kohayakawa, Yoshiharu

    ; } Suponha que o tamanho M da tabela que est´a sendo usada ´e 1024. O usu´ario percebe que muitas colis uma cadeia de caracterers T como entrada e devolve o trecho repetido mais comprido neste texto. Por tempo basicamente proporcional a n log n, onde n ´e o n´umero de caracteres em T, (b) ele gasta uma

  5. Degree Major Description TotalNew TransferSchool Dept AOS Continuing Returning Graduate Enrollment by AOS Code, School, Department, Major, and Admission Status, Spring 2010

    E-print Network

    Saidak, Filip

    (MA-Clinical)AS PSY G183 0 0 44 0 MA PSYC Psychology(MA-Developmental)AS PSY G812 0 0 33 0 MAPHD PSYC Psychology(PHD-Generl Expmntl)AS PSY G184 0 0 55 0 PHD PSYC Psychology(PHD-Clinical)AS PSY G185 0 0 2020 0 PHD PSYC Psychology(PHD-Developmental 0 65 0 76 MA PSYC Psychology(MA Only-Gen Exprtl)AS PSY G182 0 0 77 0 MA PSYC Psychology

  6. Degree Major Description 2006 2007Schoo Dept AOS 2008 2009 2010 Graduate Enrollment by School, Department, Major, and AOS Code Fall 2006 to Fall 2010

    E-print Network

    Saidak, Filip

    Psychology(MA-Social)AS PSY G811 0 0 1 0 0 MA PSYC Psychology(MA-Developmental)AS PSY G812 0 0 1 2 1 MAPHD PHD PSYC Psychology(PHD-Social)AS PSY G797 0 0 2 1 2 PHD PSYC Psychology(PHD-Developmental)AS PSY G798 Psychology(MA)AS PSY G182 12 16 11 8 11 MA PSYC Psychology(MA-Clinical)AS PSY G183 19 16 13 4 1 MA PSYC

  7. BBSO AO-308 Adaptive Optics Adaptive optics (AO) is a technique that corrects in real time for image distortions caused by motions in the Earth' s

    E-print Network

    are effectively flat. When propagating through the Earth's atmosphere, turbulent "bubbles" of air at differing for image distortions caused by motions in the Earth' s atmosphere. The Big Bear Solar Observatory (BBSO with seeing conditions. Wavefront Distortion Optical wavefronts traveling between the Sun and Earth

  8. Study of meteoroid impact craters on various materials (AO 138-1). Attempt at dust debris collection with stacked detectors (AO 138-2)

    NASA Technical Reports Server (NTRS)

    Mandeville, Jean Claude

    1991-01-01

    Part of the Long Duration Exposure Facility (LDEF) tray allocated to French experiments, known as FRECOPA payload, was devoted to the study of dust particles. Two passive experiments were flown: one composed of a set of glass and metallic samples and one composed of multilayer thin foils detectors. In addition to these experiments, a broad variety of materials were exposed to the bombardment of microparticles and provide more data. Thick target experiment comprises selected metallic (Al, Au, Cu, W, Stainless Steel) 250 microns thick and glass surfaces 1.5 mm thick. Crater size distribution from these thick target experiments enable, with the aid of lab calibrations by solid particle accelerators, the evaluation of the incident microparticle flux in the near earth environment. The aim of the multiple foil penetration and collection experiment is primarily to study the feasibility of multilayer thin film detectors acting as energy sorters in order to collect micrometeoroids, if not in their original shape, at least as 'breakup' fragments suitable for chemical analysis. Foil thicknesses range from 0.75 to 5 microns of Al.

  9. A Ao ka Po A Po ke Ao (Until Night Becomes Day, Until Day Becomes Night): Revolution: A Journey of Self-Reflection

    ERIC Educational Resources Information Center

    Kim, C. Mamo

    2013-01-01

    C. Mamo Kim is a Native Hawaiian leader and political activist in Hawai'i. In 1986 she began healing people of diseases from which their doctors had already pronounced they would be imminently dying or chronically doomed to suffer. By merely placing her hands on or near the body she was able to completely reverse the diseases or chronic…

  10. Análise de Associação por Todo o Genoma para Identificar Locos Relacionados ao Lucro Líquido, à Vida Produtiva e ao Escore de Células Somáticas na raça Jersey1

    Technology Transfer Automated Retrieval System (TEKTRAN)

    A genome scan was conducted in the US Jersey population to identify QTL affecting net merit, productive life, and somatic cell score. Data used at this study were DHI records from the national database of the Animal Improvement Programs Laboratory, USDA (Beltsville, MD). DNA was acquired for 2,380 a...

  11. Project 1640: the world's first ExAO coronagraphic hyperspectral imager for comparative planetary science

    E-print Network

    -contrast spectral-imaging effort involving a coordinated set of instrumentation and software, built at AMNH, JPL is the first of its kind of instrumentation, designed to image and characterize planetary systems around nearby decades old, started with the discovery of planets orbiting pulsars using extremely precise pulse time

  12. P2, FUNDAMENTOS DA MATEMATICA, MA 148 (10/07/2014) SUGEST~AO DE GAVARITO

    E-print Network

    Torres, Fernando

    (x) = x - a. Agora x y = G(F(x)F(y)) = F(x)F(y) - a = (x + a)(y + a) - a . Pelo tanto 1 1 = (1 + a)2. Logo ¯y2 = ¯0 e logo ¯y = ¯0. Isto mostra que y ´e par. (b) Agora mostraremos que z ´e par. Trabalhando temos 3x + 42 = 5z . Agora trabalhando em Z4: ¯( - 1)x = ¯1. Se x for impar, teriamos ¯3 = ¯( - 1) = ¯1

  13. An alise Matem atica III -Turma especial Fichas 1 a 5 -Solu c~ao parcial

    E-print Network

    Granja, Gustavo

    K #19;e limitado. 1 #12; Vamos agora ver que K #19;e fechado. Suponhamos que existe um ponto x que;e fechado. Suponhamos agora que K #19;e limitado e fechado. Come#24;camos por provar o resultado caso particular. Mostramos agora que dada uma cobertura aberta fU#11; g de K, existe #15; > 0 tal que

  14. Dvidas fiscais j no tiram bolsa aos estudantes Os 4.192 estudantes do superior a

    E-print Network

    Instituto de Sistemas e Robotica

    motivo têm, agora, 30 dias parafazê-10. Isto porque, o diploma que prevê a revogação desta norma passam agora a receber este apoio com retroactivos desde Setembro, esclareceu o Ministério da Educação que vão, agora, apresentar a sua candidatura podem apresentar "requerimento de atri- buição de bolsa

  15. Discovery of 9 New Companions to Nearby Young M Stars with the Altair AO System

    E-print Network

    Daemgen, S; Reid, I N; Close, L M; Daemgen, Sebastian; Siegler, Nick; Close, Laird M.

    2006-01-01

    We present results of a high-resolution, near-infrared survey of 41 nearby, young (= M6 very low-mass, VLM) populations. We find that the separation distribution of the binaries in this sample peaks at 13+14-9 AU, which is consistent with previous measurements of early-M binaries. Hence, early-M binaries seem to occur in--on average--tighter systems than G binaries. At the same time they are significantly wider than field VLM binary stars. The distribution of mass ratios q of primary and secondary stars was found to show an intermediate distribution between the strongly q-->1 peaked distribution of field VLM systems and the almost flat distribution of earlier-type stars. Consequently, we show evidence for relatively young, early-M binaries representing a transition between the well known earlier star distributions and the recently examined field VLM population characteristics. Despite the fact that this survey was dedicated to the search for faint brown dwarf and planetary mass companions, all planetary mass ...

  16. Discovery of 9 New Companions to Nearby Young M Stars with the Altair AO System

    E-print Network

    Sebastian Daemgen; Nick Siegler; I. Neill Reid; Laird M. Close

    2006-12-30

    We present results of a high-resolution, near-infrared survey of 41 nearby, young (Altair natural guide star adaptive optics system at the Gemini North telescope. Twelve of the objects appear to be binaries, 7 of which are reported here for the first time. One triple system was discovered. Statistical properties are studied and compared with earlier (F to K) and later (>= M6 very low-mass, VLM) populations. We find that the separation distribution of the binaries in this sample peaks at 13+14-9 AU, which is consistent with previous measurements of early-M binaries. Hence, early-M binaries seem to occur in--on average--tighter systems than G binaries. At the same time they are significantly wider than field VLM binary stars. The distribution of mass ratios q of primary and secondary stars was found to show an intermediate distribution between the strongly q-->1 peaked distribution of field VLM systems and the almost flat distribution of earlier-type stars. Consequently, we show evidence for relatively young, early-M binaries representing a transition between the well known earlier star distributions and the recently examined field VLM population characteristics. Despite the fact that this survey was dedicated to the search for faint brown dwarf and planetary mass companions, all planetary mass candidates were background objects. We exclude the existence of physical companions with masses greater than 10 Jupiter masses (M_Jup) at separations of >~40 AU and masses greater than 24 M_Jup for separations >~10 AU around 37 of the 41 observed objects.

  17. The Role of Omega-3 Dietary Supplementation in Blepharitis and Meibomian Gland Dysfunction (An AOS Thesis)

    PubMed Central

    Macsai, Marian S.

    2008-01-01

    Purpose Blepharitis and meibomian gland dysfunction (MGD) are common sources of complaints from patients. To evaluate the effect on ocular symptoms, ocular findings, and serum and meibomian gland contents, patients with blepharitis and MGD were prospectively evaluated to determine the effects of dietary supplementation with omega-3 fatty acids. Methods In a prospective randomized placebo-controlled masked trial, patients with simple obstructive MGD and blepharitis, who had discontinued all topical medications and tetracyclines, received oral omega-3 dietary supplementation consisting of two 1000-mg capsules 3 times a day. Patients were examined every 3 months for 1 year with the Ocular Surface Disease Index (OSDI) objective clinical measures, including tear production and stability, ocular surface and meibomian gland health, and biochemical plasma, red blood cell (RBC), and meibum evaluation. Primary outcome measures were change in tear breakup time (TBUT), meibum score, and overall OSDI score at 1 year. Results At 1 year, the omega-3 group had a 36% and 31% reduction in their omega-6 to omega-3 fatty acid ratios in RBCs and plasma, respectively (P = .3), whereas the placebo group demonstrated no change. At 12 months, the omega-3 group had an improvement in TBUT, OSDI score, and meibum score. Changes in meibum content were observed in the omega-3 group (P = .21); the level of meibum saturated fatty acids decreased. Conclusions This trial demonstrated a decrease in the RBC and plasma ratios of omega-6 to omega-3 in patients taking omega-3 dietary supplementation, as compared to controls, and improvements in their overall OSDI score, TBUT, and meibum score. This is the first demonstration of an induced change in the fatty acid saturation content in meibum as a result of dietary supplementation with omega-3 fatty acids. PMID:19277245

  18. Baixo peso ao nascer em duas coortes de base populacional no Sul do Brasil

    Microsoft Academic Search

    Bernardo L. Horta; Fernando C. Barros; Ricardo Halpern; Cesar G. Victora

    1996-01-01

    Low birthweight infants (under 2500 g) are much more likely to have severe diseases or die in the first year of life. This study's objective was to compare occurrence of low birthweight, preterm births, and intrauterine growth retardation in two cohorts born in the years 1982 and 1993 in Pelotas, Southern Brazil. All hospital births (corresponding to over 99% of

  19. Foil perforation particulate impact records on LDEF MAP AO023: Incident mass distributions

    NASA Technical Reports Server (NTRS)

    Mcdonnell, J. A. M.; Sullivan, K.

    1991-01-01

    An array of multiple foils varying from 1.5 to 3.0 microns exposed on Long Duration Exposure Facility's (LEDF's) geocentrically stabilized exposure platform provides perforation distributions which relate to particulate flux mass distributions and impact velocity in LDEF's orbital reference frame. The application of physical modeling enables a preliminary separation into orbital and interplanetary components, both of which have differing velocities and hence penetration effectiveness. Thin foil hypervelocity calibration data and parametric penetration formulae developed to relate target hole diameter to projectile dimensions are critically examined and a new formula offered for the ballistic limit situation. Incorporating projectile density, target density, and target strength and dimensional scaling from submicron particulates to centimeter scale data, it contrast very significantly with previous formulae in the interpretation of space impact data. Perforation flux distributions for the leading, trailing, and space pointing faces and associated mass distributions for the two populations are presented.

  20. Phase relationships in Nb-18.7 a/o Si in-situ composite

    SciTech Connect

    Cockeram, B.; Lipsitt, H.A.; Inivasan, R.; Weiss, I.

    1991-12-31

    This study will identify the crystallographic orientation relationships between the niobium and silicide phases in the cast, the cast and extruded, and the directionally solidified (DS) materials. Habit plane relationships will be experimentally identified and compared with atom site models of the crystallographic planes.

  1. Debris Disk Science with the Palomar ExAO System: First Results

    NASA Astrophysics Data System (ADS)

    Wahl, Matthew; Metchev, Stanimir; Patel, Rahul; Serabyn, Eugene; Mawet, Dimitri; Dekany, Richard; Roberts, Jennifer; Burruss, Rick; Bouchez, Antonin; Truong, Tuan; Baranec, Christoph; Guiwits, Stephen; Hale, David; Angione, John; Trinh, Thang; Zolkower, Jeffry; Shelton, J. Christopher; Palmer, Dean; Henning, John; Croner, Ernest; Troy, Mitchell; McKenna, Dan; Tesch, Jonathan

    2014-01-01

    We present first imaging results from the PALM-3000 adaptive optics system and PHARO camera on the Hale 5 m telescope. Observations using a vector vortex coronagraph have given us direct detections of the two-ring dusty debris system around the star HD 141569. Our observations reveal the inner clearing in the disk to unprecedentedly small angular separations, and are the most sensitive yet at the H and K bands. We are for the first time able to measure and compare the colors of the scattered light in the inner and outer dust rings, and find that the outer ring is significantly bluer than the inner ring.

  2. Side 1 av 3 AoC1 underskelse hsten 2006 Avsluttende test

    E-print Network

    Natvig, Lasse

    dersom kun en av enhetene tilkoblet bussen kan være bussmaster A4) Hva er sant når det gjelder gangen A5) Hva er rett når det gjelder arbitrering? [ ] Under arbitrering kodes signalene som skal sendes1) Hva vil verdien til R1 være etter følgende instruksjon: MOV R1, 17? Svar her [_______] B2) Hva

  3. Side 1 av 3 AoC1 underskelse hsten 2006 Innledende test

    E-print Network

    Natvig, Lasse

    arbitrering A4) Hva er sant når det gjelder kommunikasjon over en buss? [ ] Flere enheter kan kommunisere med adr VAR1 16 VAR2 8 VAR3 10 TABELL 11 B1) Hva vil verdien til R1 være etter følgende instruksjon: MOV R1, 17? Svar her [_______] B2) Hva vil verdien til R1 være etter følgende instruksjon: MOV R1, [R4

  4. Per: Chirapaq celebra 25 aos con un foro sobre "Derechos de los Pueblos Indgenas"

    E-print Network

    Islas, León

    Perú: Chirapaq celebra 25 años con un foro sobre "Derechos de los Pueblos Indígenas celebrará su 25 aniversario con el foro público internacional: "Derechos de los Pueblos Indígenas: Avances y la Nación Cree, ex parlamentario y miembro del Mecanismo de Expertos sobre los Derechos de los

  5. Congreso Internacional 1810-2010: 200 aos de Iberoamrica -2339 DERECHOS HUMANOS Y SEGURIDAD

    E-print Network

    Paris-Sud XI, Université de

    Congreso Internacional 1810-2010: 200 años de Iberoamérica - 2339 DERECHOS HUMANOS Y SEGURIDAD globalizaciones contra- hegemónicas ­visiones de los derechos humanos desde los contextos; la indivisibilidad trabajo de defensa del ejercicio de derechos humanos, especialmente de un #12;2340 - XIV Encuentro de

  6. Congreso Internacional 1810-2010: 200 aos de Iberoamrica -2321 LA TUTELA DE LOS DERECHOS

    E-print Network

    Paris-Sud XI, Université de

    Congreso Internacional 1810-2010: 200 años de Iberoamérica - 2321 LA TUTELA DE LOS DERECHOS Los derechos humanos constituyen un todo indivisible que deriva de la dignidad de la persona. Sin sobre la exigibilidad de los derechos de primera y de segunda generación. Mientras los derechos civiles

  7. New Frontiers AO: Advanced Materials Bi-propellant Rocket (AMBR) Engine Information Summary

    NASA Technical Reports Server (NTRS)

    Liou, Larry C.

    2008-01-01

    The Advanced Material Bi-propellant Rocket (AMBR) engine is a high performance (I(sub sp)), higher thrust, radiation cooled, storable bi-propellant space engine of the same physical envelope as the High Performance Apogee Thruster (HiPAT(TradeMark)). To provide further information about the AMBR engine, this document provides details on performance, development, mission implementation, key spacecraft integration considerations, project participants and approach, contact information, system specifications, and a list of references. The In-Space Propulsion Technology (ISPT) project team at NASA Glenn Research Center (GRC) leads the technology development of the AMBR engine. Their NASA partners were Marshall Space Flight Center (MSFC) and Jet Propulsion Laboratory (JPL). Aerojet leads the industrial partners selected competitively for the technology development via the NASA Research Announcement (NRA) process.

  8. 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

    ...Operations Center (NOC), Research Triangle Park, NC; Amended Certification Regarding...Operations Center (NOC), Research Triangle Park, North Carolina. The notice was...Operations Center (NOC), Research Triangle Park, North Carolina...

  9. Hypervelocity impact microfoil perforations in the LEO space environment (LDEF, MAP AO-023 experiment)

    NASA Technical Reports Server (NTRS)

    Mcdonnell, J. A. M.; Stevenson, T. J.

    1992-01-01

    The Microabrasion Foil Experiment comprises arrays of frames, each supporting two layers of closely spaced metallic foils and a back-stop plate. The arrays, deploying aluminum and brass foil ranging from 1.5 to some 30 microns were exposed for 5.78 years on NASA's LDEF at a mean altitude of 458 km. They were deployed on the North, South, East, West, and Space pointing faces; results presented comprise the perforation rates for each location as a function of foil thickness. Initial results refer primarily to aluminum of 5 microns thickness or greater. This penetration distribution, comprising 2,342 perforations in total, shows significantly differing characteristics for each detector face. The anisotropy confirms, incorporating the dynamics of particulate orbital mechanics, the dominance of incorporating extraterrestrial particulates penetrating thicknesses greater than 20 microns in Al foil, yielding fluxes compatible with hyperbolic geocentric velocities. For thinner foils, a disproportionate increase in flux of particles on the East, North, and South faces shows the presence of orbital particulates which exceed the extraterrestrial component perforation rate at 5 micron foil thickness by a factor of approx. 4.

  10. JOURNALDE PHYSIQUEIV Colloque C3, supplkmentau Journal de Physique11,Volume3, ao6t 1993

    E-print Network

    Paris-Sud XI, Université de

    and depends critically on the volatility and stability of the precursor materials which must be transformed. Thin and thick films with high critical temperatures and critical currents have been obtained (Tc>80K and reproducibility of the film deposition process are often degraded. Effective strategies to solve this problem

  11. MARKETING DE BANANA: PREFERÊNCIAS DO CONSUMIDOR QUANTO AOS ATRIBUTOS DE QUALIDADE DOS FRUTOS1

    Microsoft Academic Search

    FERNANDO CÉSAR AKIRA; URBANO MATSUURA; JANE IARA PEREIRA DA COSTA; MARÍLIA IEDA DA SILVEIRA

    RESUMO - O Brasil produz aproximadamente seis milhões de toneladas por ano de banana (Musa spp.), com consumo médio da ordem de 35 kg\\/ habitante \\/ ano. A aceitação da banana deve-se, principalmente, a seus aspectos sensoriais, valor nutricional e conveniência. A identificação das necessidades e desejos dos clientes consiste em uma atividade crítica do marketing. O objetivo deste trabalho

  12. ANÁLISE DOS VALORES DOS PRODUTORES RURAIS FRENTE À COOPERATIVA AO QUAL ESTÃO ASSOCIADOS

    Microsoft Academic Search

    Fabricio Oliveira Leitao; Marlon Vinicius Brisola

    2008-01-01

    A gestão empresarial tem avançado em sua forma de atuação, deixando de lado uma postura convencional de busca de lucro e rentabilidade para um enfoque preferencialmente voltado à sustentabilidade de seus negócios e de seus acionistas. Uma cooperativa não tem a perspectiva de distribuir riquezas para os acionistas, uma vez que trabalha com foco no desenvolvimento social do ambiente em

  13. [Analysis of novel style biological fluidized bed A/O combined process in dyeing wastewater treatment].

    PubMed

    Wei, Chao-Hai; Huang, Hui-Jing; Ren, Yuan; Wu, Chao-Fei; Wu, Hai-Zhen; Lu, Bin

    2011-04-01

    A novel biological fluidized bed was designed and developed to deal with high-concentration refractory organic industrial wastewater. From 12 successful projects, three cases of dyeing wastewater treatment projects with the scale of 1200, 2000 and 13000 m3/d respectively were selected to analyze the principle of treating refractory organic wastewater with fluidized bed technology and discuss the superiority of self-developed biological fluidized bed from the aspects of technical and economic feasibility. In the three cases, when the hydraulic retention time (HRT) of biological system were 23, 34 and 21. 8 h, and the volume loading of influents (COD) were 1.75, 4.75 and 2.97 kg/(m3 x d), the corresponding COD removal were 97.3%, 98.1% and 95.8%. Furthermore the operating costs of projects were 0.91, 1.17 and 0.88 yuan per ton of water respectively. The index of effluent all met the 1st grade of Guangdong Province wastewater discharge standard. Results showed that the biological fluidized bed had characteristics of shorter retention time, greater oxygen utilization rate, faster conversion rate of organic pollutants and less sludge production, which made it overcome the shortcomings of traditional methods in printing and dyeing wastewater treatment. Considering the development of technology and the combination of ecological security and recycling resources, a low-carbon wastewater treatment process was proposed. PMID:21717746

  14. Project 1640: the world's first ExAO coronagraphic hyperspectral imager for comparative planetary science

    NASA Astrophysics Data System (ADS)

    Oppenheimer, Ben R.; Beichman, Charles; Brenner, Douglas; Burruss, Rick; Cady, Eric; Crepp, Justin; Hillenbrand, Lynne; Hinkley, Sasha; Ligon, E. R.; Lockhart, Thomas; Parry, Ian; Pueyo, Laurent; Rice, Emily; Roberts, Lewis C.; Roberts, Jennifer; Shao, Michael; Sivaramakrishnan, Anand; Soummer, Rémi; Vasisht, Gautam; Vescelus, Fred; Wallace, J. Kent; Zhai, Chengxing; Zimmerman, Neil

    2012-07-01

    Project 1640, a high-contrast spectral-imaging effort involving a coordinated set of instrumentation and software, built at AMNH, JPL, Cambridge and Caltech, has been commissioned and is fully operational. This novel suite of instrumentation includes a 3388+241-actuator adaptive optics system, an optimized apodized pupil Lyot coronagraph, an integral field spectrograph, and an interferometric calibration wave front sensor. Project 1640 is the first of its kind of instrumentation, designed to image and characterize planetary systems around nearby stars, employing a variety of techniques to break the speckle-noise barrier. It is operational roughly one year before any similar project, with the goal of reaching a contrast of 10-7 at 1 arcsecond separation. We describe the instrument, highlight recent results, and document on-sky performance at the start of a 3-year, 99-night survey at the Palomar 5-m Hale telescope.

  15. M S MOLECULARES Rumo aos limites da miniaturiza o - (Molecular Magnets - towards the limits of miniaturization)

    SciTech Connect

    Reis, Mario S [Universidade Federal Fluminense, Brasil; Moreira Dos Santos, Antonio F [ORNL

    2010-01-01

    Por s culos, acreditou-se que o magnetismo s se manifestava em metais, como aqueles contendo ferro; hoje, a imagem mais comum de um m talvez seja a daquelas plaquinhas flex veis coladas geladeira com propagandas dos mais diversos tipos. O leitor conseguiria imaginar um material puramente org nico daqueles que formam os seres vivos como magn tico? E m s do tamanho de mol culas? fato: ambos existem. Esses novos materiais, conhecidos como magnetos moleculares, descobertos e desenvolvidos em v rios laborat rios do mundo, j re nem longa lista de aplica es, do tratamento do c ncer a refrigeradores ecol gicos, passando pela transmiss o de eletricidade sem perda de calor e a fabrica o de computadores extremamente velozes.

  16. CINTAL -Centro de Investigac~ao Tecnologica do Algarve Universidade do Algarve

    E-print Network

    Jesus, Sérgio M.

    level UNCLASSIFIED Distribution list IH(1), NURC(1), HLS(1), NRL(1), SiPLAB(2), CINTAL (1) Attached Research (HLS); FCT (Portugal) for the funding provided under projects UAB (POCI/MAR/59008/2004) and RADAR system . . . . . . . . . . . . . . . . . 36 3.1.3 The HLS signal generation system

  17. A ground-layer AO system demonstrator for the William Herschel Telescope

    NASA Astrophysics Data System (ADS)

    Morris, Timothy J.; Berry, Paul; Butterley, Timothy; Clark, Paul; Dunlop, Colin N.; Myers, Richard M.; Saunter, Christopher D.; Wilson, Richard W.

    2004-10-01

    An experimental Ground Layer Adaptive Optics system utilizing a low-altitude Rayleigh Laser Guide Star is presented. This demonstrator is designed for the GHRIL Nasmyth platform of the 4.2m William Herschel Telescope, where it uses a low-altitude (~4km) focused-spot 523nm Rayleigh-scatter beacon, launched from behind the secondary mirror using an independent beam launch telescope. A novel range-gate is used to select the LGS return altitude for wavefront sensing, whilst wavefront correction uses a 97-actuator continuous phase sheet deformable mirror and separate tip-tilt mirror. The performance can be monitored on-axis and off-axis. These and other aspects of the demonstration system are described in detail, including optical design, laser launch technique, laboratory performance, and a preliminary assessment of potential on-sky performance.

  18. La Baha de Montevideo: 150 aos de modificacin de un paisaje costero y subacutico1

    E-print Network

    Boyer, Edmond

    , Uruguay. Abstract The bay of Montevideo is the sector of the Uruguayan shore having the most complex Plata, Uruguay. 1 Este artículo es una síntesis de la Tesis de Licenciatura en Geografía defendida por más. La primera es de reciente desarrollo en el Uruguay

  19. Supervisory Control of Families of Stabilizing Controllers \\Lambda Jo~ao Hespanha y

    E-print Network

    Hespanha, João Pedro

    a fast response, but if the vehicle is tracking an underwater pipeline to look for leaks, it is important problems this is not likely. Consider for example the control of an autonomous underwater vehicle [1

  20. Evolution of Neural Networks Using Weight Mapping Jo~ao Carlos Figueira Pujol and Riccardo Poli

    E-print Network

    Fernandez, Thomas

    programming evolves a map­ ping function to adapt the weights, whereas a genetic algorithm­based approachJ.Pujol,R.Polig@cs.bham.ac.uk PHONE: (+44)(0121) 414 37 39 Abstract The application of genetic programming to the evolution of neural of a good mechanism for encoding the weights. In this work, a hybrid method is introduced, where genetic

  1. A thermochemical pretreatment process to produce xylooligosaccharides (XOS), arabinooligosaccharides (AOS) and mannooligosaccharides (MOS) from lignocellulosic biomasses.

    PubMed

    Otieno, Daniel O; Ahring, Birgitte K

    2012-05-01

    Efficient and high yield production of xylooligosaccharides, arabinooligosaccharide and mannooligosaccharides from biomasses is a significant boost to the nutraceutical and pharmaceutical industry. These organic compounds, also known as prebiotics, promote the growth of intestinal probiotic microorganisms thus improving the hosts' overall immune system. This work aimed at designing a thermochemical pretreatment of biomasses leading to production of high prebiotic yields and assessing the liquor quality based on resultant oligomer-monomer constituents. Four biomasses, namely Miscanthus sinensis, Panicum virgatum, Calamagrostis acutiflora and Bagasse, each having a dry weight xylan content of ? 20% were used. Identification and quantification using HPLC and ion chromatography systems showed xylooligomer yields of 65.0%, 84.2%, 87.9% and 92.3%, respectively. The xylooligomers also showed a degree of polymerization ranging from 2 to 25. These results demonstrate the potential of a low cost, pretreatment process of biomasses which may be suitable for a commercial scale production of prebiotics. PMID:22425397

  2. Aspectos da satisfação das mulheres com a assistência ao parto: contribuição para o debate

    Microsoft Academic Search

    Rosa Maria Soares Madeira Domingues; Elizabeth Moreira dos Santos; Maria do Carmo Leal

    2004-01-01

    Abstract The objective of this study was,to evaluate fac- tors associated,with women’s,satisfaction with vaginal,delivery ,at the ,Leila Diniz Maternity Hospital in Rio de Janeiro, Brazil. A cross-sec-

  3. Aspectos da satisfação das mulheres com a assistência ao parto: contribuição para o debate

    Microsoft Academic Search

    Rosa Maria Soares; Madeira Domingues; Elizabeth Moreira dos Santos

    The objective of this study was to evaluate fac- tors associated with women's satisfaction with vaginal delivery at the Leila Diniz Maternity Hospital in Rio de Janeiro, Brazil. A cross-sec- tional study was conducted from March 1 to 30, 1999, using interviews with women who had undergone vaginal delivery. In order to analyze women's satisfaction, the following were used: (a)

  4. Congreso Internacional 1810-2010: 200 aos de Iberoamrica -2581 ORGANIZACIONES INDGENAS

    E-print Network

    Paris-Sud XI, Université de

    cosmovisión y de su manera de entender el mundo en América Latina y en otras partes del mundo. Dichas demandas Antonio Alejo Jaime USC España La globalización enmarca hoy el contexto en el que las organizaciones, simbólicamente marcada por los festejos de los 500 años del Encuentro de dos Mundos, venimos asistiendo

  5. Santa Fe Institute Working Paper 04-08-025 arxiv.org:/abs/nlin.AO/0408039

    E-print Network

    Crutchfield, Jim

    in Collective Adaptation Yuzuru Sato,1, Eizo Akiyama,2, and James P. Crutchfield1, 1 Santa Fe Institute, 1399 equations that describe collective adaptation, starting from a discrete-time stochastic microscopic model. The behavior of each agent is a dynamic balance between adaptation that locally achieves the best action

  6. Santa Fe Institute Working Paper 0408025 arxiv.org:/abs/nlin.AO/0408039

    E-print Network

    Crutchfield, Jim

    in Collective Adaptation Yuzuru Sato, 1, # Eizo Akiyama, 2, + and James P. Crutchfield 1, # 1 Santa Fe Institute#erential equations that describe collective adaptation, starting from a discrete­time stochastic microscopic model. The behavior of each agent is a dynamic balance between adaptation that locally achieves the best action

  7. Proposta de um Modelo RBC para Construção de um Sistema de Apoio ao Diagnóstico Médico

    Microsoft Academic Search

    Renata de Paiva Silva; Edilson Ferneda; Lourdes Mattos Brasil; Ana Paula; Benardi da Silva; Hervaldo Sampaio Carvalho

    The IACVIRTUAL project (Artificial Intelligence Applied in the Modelling and Implementation of a Virtual Medical Office) proposes an intel- ligent system to simulate a Web-based Medical Office conceived to support (i) patients who are interested in following their medical reports, (ii) profession- als interested in decisions support systems for diagnosis and treatment, and (iii) students interested in learning by following

  8. W.I. Fushchych, Scientific Works 2002, Vol. 4, 216230. AO(n) n n-1

    E-print Network

    Nikitin, Anatoly

    = F(||), F -- , (1) - A ~G(1, n) [5], : Pa = -a, Jab = xbb - xba, Ga = ta + xa 2ki ( - ), T = t, M = 1 2ki ( - ) (a, b = 1, 2, . . . , n). : [Jab, Jcd] = adJbc + bcJad - acJbd - bdJac, [Pa, Pb] = [Ga, Gb] = 0, [Pa, Jbc] = abPc - acPb, [Ga, Jbc] = abGc - acGb, [T, Jab] = 0, [T, Pa] = 0, [T

  9. Degree Major Description TotalWomen MenSchoo Dept AOS Graduate Enrollment by School, Department,

    E-print Network

    Saidak, Filip

    Design 55 0AS IAR G454 MS IARC Interior Architecture 43 1AS IAR G455 MS IARC Museum Studies (MS) 22 0AS Community Economic Dev (MPA) 52 3AS PSC G816 Department total 8052 28 MA PSYC Psychology(MA Only-Gen Exprtl) 107 3AS PSY G182 MA PSYC Psychology(MA-Clinical) 11 0AS PSY G183 MA PSYC Psychology

  10. Ao. Univ.-Prof. Dr. Alois Panholzer Institut fr Diskrete Mathematik und Geometrie

    E-print Network

    Kuba, Markus

    of recursive algorithms and recursive structures. Granted research budget (Austrian Part): 6.000 Euro of the FWF funded Austrian research network Analytic combinatorics and probabilistic number theory. Granted funded French-Austrian Amadée-project Combinatorial analysis of data structures. Granted research budget

  11. End-to-end communication test on variable length packet structures utilizing AOS testbed

    NASA Technical Reports Server (NTRS)

    Miller, Warner H.; Sank, V.; Fong, Wai; Miko, J.; Powers, M.; Folk, John; Conaway, B.; Michael, K.; Yeh, Pen-Shu

    1994-01-01

    This paper describes a communication test, which successfully demonstrated the transfer of losslessly compressed images in an end-to-end system. These compressed images were first formatted into variable length Consultative Committee for Space Data Systems (CCSDS) packets in the Advanced Orbiting System Testbed (AOST). The CCSDS data Structures were transferred from the AOST to the Radio Frequency Simulations Operations Center (RFSOC), via a fiber optic link, where data was then transmitted through the Tracking and Data Relay Satellite System (TDRSS). The received data acquired at the White Sands Complex (WSC) was transferred back to the AOST where the data was captured and decompressed back to the original images. This paper describes the compression algorithm, the AOST configuration, key flight components, data formats, and the communication link characteristics and test results.

  12. Optimal Communication Logics in Networked Control Systems Yonggang Xu Jo~ao P. Hespanha

    E-print Network

    Hespanha, João Pedro

    to be deterministic. I. INTRODUCTION In recent years Networked Control Systems (NCS) emerged as a playground an NCS struc- ture for spatially distributed processes in continuous-time. In this control architecture problem includes a quadratic term on the estimation error and a linear term on the communication cost

  13. PRUEBA DE ACCESO A LA UNIVERSIDAD PARA MAYORES DE 25 AOS Asignatura GEOGRAFA

    E-print Network

    Escolano, Francisco

    , general en todas las edades, ha sido muy intensa entre los jóvenes. Esta disminución de las bodas no ha lleguen a la edad de la jubilación). Menos jóvenes que, probablemente, no tendrán dificultades para mapa indique: a) Las cuatro provincias españolas con menor porcentaje de jóvenes. b) ¿Qué provincia de

  14. Los bebs de hasta un ao de edad y hasta 20 libras

    E-print Network

    ASIENTOS DE SEGURIDAD SÍ SALVAN VIDAS La ley de Texas dice que bebés y niños menores de 4 años de edad y deLos bebés de hasta un año de edad y hasta 20 libras de peso, deben de utilizar los asientos de HACIA ATRAS Los niños de más de un año de edad y entre las 20 y 40 libras de peso, pueden utilizar

  15. Congreso Internacional 1810-2010: 200 aos de Iberoamrica -1873 EL APROVECHAMIENTO TURSTICO

    E-print Network

    Paris-Sud XI, Université de

    economías, y si cumplen los requisitos para poder considerarlo sostenible. Desarrollo local y las prácticas desarrollo sostenible, 1. El Plan Director de las Áreas Naturales Protegidas no está publicado. Es un innegable su historia y su desarrollo. En épocas recientes, el aprovechamiento de estos recursos a nivel

  16. Ambiente Hipertexto para Apoio ao Planejamento e Elaboração de Cursos de Treinamento Segundo a Metodologia TRAINAIR

    Microsoft Academic Search

    José Maria Parente de Oliveira; Clovis Torres Fernandes

    1998-01-01

    The design and implementation of a hypertext environment for supporting the development of training courses according to the TRAINAIR Methodology, named TrainTool, is presented in this paper. The purpose of this environment is to improve the process of handling, storing, and retrieving information compiled during a course preparation. To specify such a supporting environment, a model for modeling hypertext applications

  17. Team Description for RoboCup 2014 Jo~ao Pessoa, Brasil

    E-print Network

    Visser, Arnoud

    ;1 Introduction The Dutch Nao Team consists of students and staff members from three Dutch universities. The Dutch,00 Universities registration contribution e1600,00 Total e4080,00 Table 1: An overview of the Dutch Nao Team has cooperated in several leagues with other universities, for instance, 1 See for an overview http

  18. Educação ambiental aplicada aos resíduos sólidos na cidade de Olinda, Pernambuco - um estudo de caso

    Microsoft Academic Search

    Liliane Gadelha da Costa SOARES; Alexandra Amorim; Maria Helena Paranhos

    Environmental education is the main instrument of transformation, being essential for the development of a critical cons- cience in relation to the environment, generating compromise and responsibility of the population towards the actions of sanitation and health. Environmental education has being used as an instrument to decide about the problems associated with solid residues, since generation, collection, transport and disposal

  19. Room acoustic auralization with Ambisonics J.-D. Polack and F. Le~ao Figueiredo

    E-print Network

    Boyer, Edmond

    architectural designs. The measurements were carried out with a Soundfield microphone, in order to afterward to realise the auralization, then moves on to the subjective tests realised with the system. Statistical, architectural, or acoustic interest. Statistical analysis of the measured acoustical indices is presented

  20. J. Phys. III France (1991) 1359-1376 Ao0T 1991, PAGE 1359 Classification

    E-print Network

    Boyer, Edmond

    1991-01-01

    'un mklange gazeux. 2.I LE RisouE HYDROGtNE. Le 28 mars 1979, § la centrale de Three Mile Island 2, se centrale, mdme I distance. Ces incidents peuvent dtre : d'origine interne, I la suite d'un accident de

  1. Higher Irradiance and Photodynamic Therapy for Age-Related Macular Degeneration (An AOS Thesis)

    PubMed Central

    Miller, Joan W.

    2008-01-01

    Purpose Photodynamic therapy (PDT) using verteporfin was the first pharmacologic therapy for neovascular age-related macular degeneration and changed the treatment paradigm for a major, blinding disease. The experimental work in the nonhuman primate was essential in developing treatment parameters for verteporfin PDT that could successfully occlude choroidal neovascularization with limited injury to the neural retina. Early in the preclinical primate studies, we hypothesized that higher irradiances could be used for ocular PDT than had been used in dermatology and other applications, which typically utilized an irradiance of 150 to 200 mW/cm2. We set out to test the feasibility of irradiances up to 1800 mW/cm2. Methods PDT was applied to normal monkey eyes using verteporfin/benzoporphyrin derivative (BPD) (2 mg/kg) mixed with low-density lipoprotein in DMSO, and 692-nm light, with a spot size 1250?m, fluence approximately 50 J/cm2, and irradiance varying from 150 (treatment time, 6 minutes) to 1800 mW/cm2 (treatment time, 30 seconds). Photocoagulation lesions were applied using 514-nm and 692-nm laser light without drug, with irradiance of 18,750 to 200,000 mW/cm2 and spot size of 500 ?m. Treatment effect was evaluated by fundus photography, angiography, and light and electron microscopy with collagen denaturation as a marker of thermal injury. Results Verteporfin/BPD PDT at irradiances of 150 to 1800 mW/cm2 showed no collagen denaturation in contrast to photocoagulation lesions without dye (irradiance 10-fold and higher). Conclusions Verteporfin PDT could safely be performed at higher irradiances, permitting a clinically practical therapy. Ultimately, clinical trials demonstrated that verteporfin PDT could limit moderate vision loss in neovascular age-related macular degeneration. Although anti-VEGF therapy has replaced PDT as a first-line therapy, PDT may still have a role, perhaps in combination therapies. Further investigations to optimize drug delivery and to better understand the molecular mechanisms of PDT effects in both choroidal neovascularization and retina will improve its application in macular diseases. PMID:19277246

  2. EL ACUFERO DE LA VEGA DE GRANADA: 40 AOS DE MEDIDAS A. Castillo(1)

    E-print Network

    Castillo, Antonio

    EL ACUÍFERO DE LA VEGA DE GRANADA: 40 AÑOS DE MEDIDAS DE NIVELES A. Castillo(1) , V.M. Robles detrítico de la Vega de Granada, uno de los más importantes de Andalucía (200 km2 y 160 hm3 /a), ha sufrido piezométricos, y permita al mismo tiempo un adecuado flujo ambiental al río Genil. Palabras clave: acuífero Vega

  3. Congreso Internacional 1810-2010: 200 aos de Iberoamrica -509 DESARROLLO TEXTIL EN LA CIUDAD

    E-print Network

    Boyer, Edmond

    Josep María Delgado Ribas hace una tipología para los emigrantes catalanes y de acuerdo al tiempo de, tiempo con que, en principio, contaban los sobrecargos para proceder a la venta de los géneros embarcados años ­tiempo máximo permitido por la R.O. de 12 de agosto de 1790- y que venía a coincidir con el

  4. Congreso Internacional 1810-2010: 200 aos de Iberoamrica -2259 LA INMIGRACIN EN EL MARCO

    E-print Network

    Boyer, Edmond

    latinoamericanos de origen de los inmigrantes y los Estados miembros de la Unión Europea de destino. Por lo que se International Organization for Migration, May, 2004 y Joao Peixoto, J. «A Socio-Political View of International

  5. Compositional analysis of projectile residues on LDEF instrument AO187-1

    NASA Technical Reports Server (NTRS)

    Bernhard, Ronald P.; Horz, F.

    1992-01-01

    Impact craters greater than 30 microns and associated projectile residues were analyzed by Scanning Electron Microscopy (SEM) and Energy Dispersive X-ray Analysis (EDXA). Objectives were to analyze a statistically significant number of projectiles to evaluate their chemical variability and possible clustering into discrete particle types. Bay A11 exposed six collector surfaces of anodized 1100-T4 (greater than 99 percent pure) aluminum sheets, 0.32 cm thick, yielding an exposed surface area of 1.1 sq. m. Four of the six panels have been retained at JSC, and were optically scanned, one (A11E00E) was prepared for SEM/EDX analysis. Bay A03 was occupied by high purity (99.99 percent) gold sheets, 0.5 mm thick, yielding an exposed surface area of 0.85 sq. m. Sample processing included the optical scanning (6X), labeling, and dislodging (by a punch-die device) of each individual impact greater than 75 microns for the aluminum and 30 microns for the gold. The 209 craters were dislodged form A11E00E, having crater diameters up to 3500 microns. Optical examination of the gold surfaces detected 238 craters, 198 of which were retained at JSC and analyzed via SEM/EDX. The analytical procedures included maximizing the geometric efficiency (take-off angles), using relatively long count times (500-1000 sec) and sufficiently high accelerating currents (25-30Kev). Despite diligent examination, a large number of craters did not exhibit measurable signals above background. Detectable resides were classified as either micrometeoritic or as man-made debris.

  6. AO05: Ash detection and characterisation in IASI data Candidate number: 249038

    E-print Network

    Oxford, University of

    of the properties of the plume are extracted including: optical depth, the cloud top height and the effective radius an effect on climate change. Ash released in volcanic explosion can drift up to 30 km high, staying in the upper troposphere for many days or weeks (Mastin et al., 2009). Parti- cles with small radii tend

  7. Teoria de Resposta ao Item na análise de uma prova de estatística em universitários

    Microsoft Academic Search

    Claudette Maria Medeiros Vendramini; Anelise Silva Dias

    2005-01-01

    This study aimed to use the Item Response Theory to analyze the 15 multiple-choice questions of a statistics test presented in the statistics graphics or tables form. The 414 university students were selected by convenience from two private universities, predominantly psychology students (91.5%). The university students were 80% female and with 16-53 years old, mean 24.4 and standard deviation 7.4.

  8. XMM-Newton X-ray Observatory Guest Observer program (AO-1) at CASA

    NASA Technical Reports Server (NTRS)

    Skinner, Stephen L.

    2003-01-01

    In this research program, we obtained and analyzed X-ray observations of the Wolf-Rayet (WR) star WR 110 (HD 165688) using the XMM-Newton space-based observatory. Radio observations were also obtained using the Very Large Array (VLA) radio telescope located in New Mexico and operated by the Natl. Radio Astronomy Observatory (NRAO). This star was targeted for observations primarily because it is believed to be a single WR star without a companion. Single WR stars are thought to emit X-rays from cool plasma in shocks distributed throughout their powerful stellar winds. However, there has been little observational work done to test this idea since single WR stars are relatively weak X-ray sources and have been difficult to detect with previous generation telescopes. The launch of XMM-Newton provides a new telescope that is much more sensitive than its predecessors, allowing single WR stars to be studied in detail for the first time. X-ray emission was clearly detected from WR 110. Analysis of its spectrum yields a surprising result. Its X-ray emitting plasma is distributed over a range of temperatures and is dominated by relatively cool plasma with a characteristic temperature T is approximately 6 million K. Such plasma can be explained by existing theoretical wind shock models. However, the spectrum also shows hotter plasma whose temperature is uncertain but is thought to be in excess of T approximately 30 million K. The origin of this hotter plasma is yet unknown, but possible mechanisms are identified

  9. Resistência ao Cisalhamento do Compósito Carbono Reforçado com Fibras de Carbono\\/Tecido tipo Twill

    Microsoft Academic Search

    J. C. Dias

    2004-01-01

    The prediction of the strength of structures made of composites materials is the great importance when designing with Carbon Fiber Reinforced Carbon composite-CRFC\\/twill. This paper addresses the issue of the measurement of in-plane shear strengths of CRFC\\/twill composites from Iosipescu specimens. Among the important design parameters for this composite is the in-plane shear strength. The purpose of this present paper

  10. Tendência histórica de preços pagos ao produtor na pecuária do Rio Grande do Sul, Brasil

    Microsoft Academic Search

    Renato Santos de Souza; João Garibaldi Almeida Viana; Anderson Bortoli

    2006-01-01

    This work analyses the historical evolution of prices paid to farmers of main animal derived products from the state of Rio Grande do Sul for the last three decades, emphasizing tendencies that occurred since the 90s, and mainly after the monetary stabilization obtained in 1994 with the \\

  11. INADIMPLÊNCIA AO CRÉDITO RURAL NA FRUTICULTURA IRRIGADA DO PÓLO PETROLINA-JUAZEIRO Leonardo Ferraz Xavier

    Microsoft Academic Search

    2008-01-01

    Resumo O presente trabalho estuda a utilização do crédito rural na fruticultura irrigada do Pólo Petrolina-Juazeiro. A análise dos dados da pesquisa realizada junto a produtores do Pólo e o estudo econométrico permitiram a definição das principais variáveis associadas à inadimplência e à estimativa da regressão logística que explica o fenômeno. Os resultados alcançados sugerem que a inadimplência no Pólo

  12. Progress report on the ultra heavy cosmic ray experiment (AO178)

    NASA Technical Reports Server (NTRS)

    Thompson, A.; Osullivan, D.; Bosch, J.; Keegan, R.; Wenzel, K.-P.; Jansen, F.; Domingo, C.

    1993-01-01

    The Ultra Heavy Cosmic Ray Experiment (UHCRE) is based on a modular array of 192 side-viewing solid state nuclear track detector stacks. These stacks were mounted in sets of four in 48 pressure vessels employing sixteen peripheral Long Duration Exposure Facility (LDEF) trays. The extended duration of the LDEF mission has resulted in a greatly enhanced scientific yield from the UHCRE. The geometry factor for high energy cosmic ray nuclei, allowing for Earth shadowing, was 30 sq m-sr, giving a total exposure factor of 170 sq m-sr-y at an orbital inclination of 28.4 degrees. Scanning results indicate that about 3000 cosmic ray nuclei in the charge region with Z greater than 65 were collected. This sample is more than ten times the current world data in the field (taken to be the data set from the HEAO-3 mission plus that from the Ariel-6 mission) and is sufficient to provide the world's first statistically significant sample of actinide (Z greater than 88) cosmic rays. Results to date are presented including details of ultra-heavy cosmic ray nuclei, analysis of pre-flight and post-flight calibration events and details of track response in the context of detector temperature history. The integrated effect of all temperature and age related latent track variations cause a maximum charge shift of +/- 0.8 e for uranium and +/- 0.6 e for the platinum-lead group. The precision of charge assignment as a function of energy is derived and evidence for remarkably good charge resolution achieved in the UHCRE is considered. Astrophysical implications of the UHCRE charge spectrum are discussed.

  13. Congreso Internacional 1810-2010: 200 aos de Iberoamrica -1349 TICA Y ESTTICA TRAS EL DESAFO

    E-print Network

    Paris-Sud XI, Université de

    artístico y social, por la explosión que hizo volar el conjunto de viviendas protegidas Pritt-Igoe en 1972,seapoyabaenlosgrandesparadigmasosistemasdepensamiento políticos, sociales, científicos y religiosos. Desde ese momento de crisis deja de ser posible hablar de

  14. PRUEBA DE ACCESO A LA UNIVERSIDAD PARA MAYORES DE 25 AOS Asignatura GEOGRAFA

    E-print Network

    Escolano, Francisco

    intenso ha generado en algunos sectores sociales actitudes xenófobas y algunos temores sobre posibles vivienda. Es posible que la crisis económica reduzca la llegada de extranjeros, pero en un país de baja

  15. Seminario Informal (mas Formal!) 2005 Verificac ~ao Formal em PVS do Sistema KB2D

    E-print Network

    Ayala-Rincón, Mauricio

    ;3o Semin´ario Informal (mas Formal!) 2005 GTC - Departamento de Matem´atica Problema TCAS - Traffic Formal!) 2005 GTC - Departamento de Matem´atica Problema TCAS - Traffic Alert and Collision Avoidance Matem´atica Problema TCAS - Traffic Alert and Collision Avoidance System. RR3D - Algoritmo de Resoluc

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

    E-print Network

    Dinner, Aaron

    a set of trajectories, each of which consists of a series of points in a many-dimensional phase space. To interpret these data and construct analytic theories that allow generalization and con- nection or by exhaustive exploration14,15 for only the simplest of systems. Consequently, the coordinates that provide

  17. Avaliação dos riscos associados ao uso do xilol em laboratórios de anatomia patológica e citologia

    Microsoft Academic Search

    Irapuan Oliveira Pinheiro; Glícia Torres Calazans; Márcia Silva

    In this study a diagnosis of occupational exposure related to xylol use by technicians in cytology and anatomic pathology was carried out in eight laboratories which care for the population of Recife and towns in the interior of the state of Pernambuco. Data were obtained by multiple choice questionnaires. Emphasis was given to information concerning occupational health and perception of

  18. O CAMINHO DA LOUCURA E A TRANSFORMAÇÃO DA ASSISTÊNCIA AOS PORTADORES DE

    Microsoft Academic Search

    Helena de Fátima Bernardes

    This paper departs from new psychiatry concepts and practices crossing the context of collective mental health, considering the historical development that favors the understanding for the construction of new social and technical ways of dealing with madness, mental disease and human suffering. It also emphasizes that mental health care went through various changes, from institutionalization to Psychosocial Care Services, bringing

  19. Variáveis associadas ao câncer de mama em usuárias de unidades básicas de saúde

    Microsoft Academic Search

    Valéria Fernandes de Souza; Evandro Silva; Freire Coutinho

    An epidemiological survey in ten family health units in the municipality of Teresópolis, Rio de Janeiro State, Brazil, in 2003, investigated the distribution pattern of breast cancer risk fac- tors. 698 women 25 to 88 years of age were in- terviewed (112 rural and 586 urban). As for fac- tors associated with breast cancer, 36.1% were 50 years or older,

  20. A Gestão Estratégica das Instituições de Ensino Superior: uma contribuição ao melhor desempenho no caso brasileiro

    Microsoft Academic Search

    Alfredo Colenci Júnior; Ana Lúcia Spigolon; Marco Anselmo de Godoi; Maria Elizete Luz Sáes

    Resumo: O crescimento no número de instituições de Ensino Superior no Brasil tem provocado inadequações, decorrentes da má gestão e do baixo comprometimento em relação à qualidade do processo educacional. O não alinhamento da educação superior com políticas de desenvolvimento e a falta de uma efetiva regulamentação institucional, no atendimento às demandas regionais, representam uma grave dispersão de esforços e

  1. RESOLUCIN DO CONCURSO DE ACCESO AO USO DAS HORTAS COMUNITARIAS DA UNIVERSIDADE DA CORUA

    E-print Network

    Fraguela, Basilio B.

    Torre Vaamonde 27 Antonio Madrid López 28 Fátima Freire Castro 29 Margarita Echevarría Canoura 30 JOSE Gayoso Gonzalez 35 Yaiza Blanco Garcia 36 Ero Lombao Blanco 37 Natasha Faith Martínez Taylor 38 CATARINA MARIA GONZALEZ GONZALEZ 39 Marcos Blanco Puga 40 Oscar Trashorras Polin 41 Fátima Andrade Pombo 42 Reyes

  2. Cooperative pursuit with sensing limitations Shaunak D. Bopardikar Francesco Bullo Jo~ao P. Hespanha

    E-print Network

    Hespanha, João Pedro

    ]. The algorithm SPHERES enables the pursuers to capture an evader initially located inside their convex hull and a single evader in an unbounded, planar environment in which each player has limited-range sensing and the evader strategy. We then propose a novel cooperative pursuit algorithm and show that the problem

  3. Facility class Rayleigh beacon AO system for the 4.2m William Herschel telescope

    Microsoft Academic Search

    René G. Rutten; Paul Clark; Richard M. Myers; Richard W. Wilson; Richard G. Bingham; Eric Emsellem; Thomas Gregory; Ronald A. Humphreys; Johan Knapen; Gilberto Moretto; Simon L. Morris; Gordon Talbot

    2003-01-01

    A rationale is presented for the use of a relatively low-altitude (15km) Rayleigh Laser Guide Star to provide partial adaptive optics correction across a large fraction of the sky on the 4.2m William Herschel Telescope. The scientific motivation in relation to the available instrumentation suite is discussed and supported by model performance calculations, based on observed atmospheric turbulence distributions at

  4. A ground-layer AO system demonstrator for the William Herschel Telescope

    Microsoft Academic Search

    Timothy J. Morris; Paul Berry; Timothy Butterley; Paul Clark; Colin N. Dunlop; Richard M. Myers; Christopher D. Saunter; Richard W. Wilson

    2004-01-01

    An experimental Ground Layer Adaptive Optics system utilizing a low-altitude Rayleigh Laser Guide Star is presented. This demonstrator is designed for the GHRIL Nasmyth platform of the 4.2m William Herschel Telescope, where it uses a low-altitude (~4km) focused-spot 523nm Rayleigh-scatter beacon, launched from behind the secondary mirror using an independent beam launch telescope. A novel range-gate is used to select

  5. Synergy between glyphosate- and cypermethrin-based pesticides during acute exposures in tadpoles of the common South American toad Rhinella arenarum.

    PubMed

    Brodeur, Julie Céline; Poliserpi, María Belén; D'Andrea, María Florencia; Sánchez, Marisol

    2014-10-01

    The herbicide glyphosate and the insecticide cypermethrin are key pesticides of modern management in soy and corn cultures. Although these pesticides are likely to co-occur in ephemeral ponds or aquatic systems supporting amphibian wildlife, the toxicological interactions prevailing in mixtures of these two pesticides have been little studied. The current study evaluated the toxicity of equitoxic and non-equitoxic binary mixtures of glyphosate- and cypermethrin-based pesticides to tadpoles of the common South American toad, Rhinella arenarum. Two different combinations of commercial products were tested: glyphosate Glifosato Atanor®+cypermethrin Xiper® and glyphosate Glifoglex®+cypermethrin Glextrin®. When tested individually, the formulations presented the following 96 h-LC50s: Glifosato Atanor® 19.4 mg ae L(-1) and Glifoglex 72.8 mg ae L(-1), Xiper® 6.8 mg L(-1) and Glextrin® 30.2 mg L(-1). Equitoxic and non-equitoxic mixtures were significantly synergic in both combinations of commercial products tested. The magnitude of the synergy (factor by which toxicity differed from concentration addition) was constant at around twofold for all tested proportions of the glyphosate Glifoglex®+cypermethrin Glextrin® mixture; whereas the magnitude of the synergy varied between 4 and 9 times in the glyphosate Glifosato Atanor®+cypermethrin Xiper® mixture. These results call for more research to be promptly undertaken in order to understand the mechanisms behind the synergy observed and to identify and quantify the extent of its environmental impacts. PMID:25048890

  6. The LSTS Toolchain for Networked Vehicle Systems* Jose Pinto1, Paulo S. Dias1, Ricardo Martins1, Jo~ao Fortuna1, Eduardo Marques2 and Jo~ao Sousa1

    E-print Network

    Marques, Eduardo R. B.

    -source software toolchain developed by the Underwater Systems and Technology Laboratory (LSTS) for supporting the objectives to that device. 1 Underwater Systems and Technology Laboratory (LSTS), Faculdade de Engenharia da of the operator on the right was to obtain an underwater sidescan survey at a remote location, this should

  7. Lista de las veinticinco especies de inters para el proyecto piloto MoSI de cinco aos y sus tendencias poblacionales de veintitres aos (P = regular y relativamente comn, O = irregular o poco comn). Nombres en

    E-print Network

    DeSante, David F.

    -2002 2 TPM TPM TPM TPM TPM TPM Empidonax traillii Neg.** P P E. minimus Neg.** P O P P O E. oberholseri programa MoSI incluyen las siguientes: E. flaviventris, E. difficilis/occidentalis, V. bellii, Troglodytes

  8. EDUCAÇÃO AO AR LIVRE: UM ESTUDO SOBRE AS CONTRIBUIÇÕES DA EDUCAÇÃO EXPERIENCIAL AO AR LIVRE PARA O PROCESSO DE EDUCAÇÃO AMBIENTAL. Outdoor Education: a study on the contributions of outdoor experiential education to the process of environmental education

    Microsoft Academic Search

    Caetano Moreira; FALCÃO NETO; Edmilson Montenegro FONSECA; Signe Dayse

    The search for the natural environment is not a new phenomenon. The interest in the practice of outdoor activities in well preserved environments or even with a few changes caused by humans, has been a reality since the 19th century. Since then, humankind has developed tools in order to decrease the impacts caused by these activities in the environment, and

  9. Degree Major Description TotalWhite Afr AmSchool Dept AOS Am Ind Asian UNCG 2009-10 Doctoral Degree Recipients by School, Department, Major, AOS Code, and Ethnicity

    E-print Network

    Saidak, Filip

    1 PHD EXSS Exercise & Sport Science PHDHE KIN G320 2 1 3 PHD KINS Applied Neuromechanics PHDHE KIN G Geography (PHD)AS GEO G746 3 51 1 Department total 3 1 51 PHD PSYC Psychology(PHD-Clinical)AS PSY G185 6 71 PHD PSYC Psychology(PHD-Cognitive)AS PSY G799 2 2 PHD PSYC Psychology(PHD-Developmental)AS PSY G798 1

  10. JOURNAL DE PHYSIQUE IV Colloque C3,supplkmentau Journal de Physique 11, Volume3, aoOt 1993

    E-print Network

    Paris-Sud XI, Université de

    acetylene, boron trichloride, ammonia and hydrogen as input gases. Compositions are located in the ternary intercalation products, sothe carbon-boron-nitrogencompoundsoffer a greatinterestfor material scienceresearch;196 JOURNAL DE PHYSIQUE IV Another aspect is the improvement of the carbon oxidation resistance that could

  11. Adapted Dynamic Meshes for Deformable Surfaces Fernando de Goes Felipe P. G. Bergo Alexandre X. Falc~ao Siome Goldenstein

    E-print Network

    Adapted Dynamic Meshes for Deformable Surfaces Fernando de Goes Felipe P. G. Bergo Alexandre X intro- duce a framework for constructing and maintaining a time- varying adapted mesh structure for computation. The solution for this problem is to use adapted meshes. Mesh adaptation is an area of intense

  12. Cambios en cobertura e ndices de vegetacin de los mangles en el rea de La Parguera durante 70 aos

    E-print Network

    Gilbes, Fernando

    imágenes, ENVI. Además, se utilizaron fotos aéreas (1936 y 1977) e imágenes del sensor IKONOS Parguera del 2001 y 2006 también se utilizarán fotos aéreas del 1936 y 1977 para la misma aérea de la Parguera. Para esto el primer paso y el mas importante es la búsqueda de las imágenes o fotos

  13. JOURNALDE PHYSIQUEIV ColloqueC3, supplementauJournaldePhysique11,Volume3,aoDt1993

    E-print Network

    Boyer, Edmond

    transition metal oxides and their impact on solar energyutilization K.A. GESHEVAand D.S. GOGOVA Central, Bulgaria Abstract. The paper presents results concerning CVD thin films of transition metals (W and Mo conversion of solar energy into heat. Transition metal trioxides thin films, known as electrochromic

  14. 3D face recognition from multiple images: a shape-from-motion approach Manuel Marques and Jo~ao Costeira

    E-print Network

    Instituto de Sistemas e Robotica

    -friendly face recognition system, was concentrated on dealing with the following main issues: il- lumination3D face recognition from multiple images: a shape-from-motion approach Manuel Marques and Jo of the approach. 1. Introduction Face recognition has attracted significant attention in commercial and research

  15. A navegação na bacia do Paraná e a integração do antigo sul de Mato Grosso ao mercado nacional

    Microsoft Academic Search

    Paulo Roberto Cimó Queiroz

    2004-01-01

    This paper deals with the commercial navigation in the Upper Paraná basin, within the former southern territory of Mato Grosso State (in present days, Mato Grosso do Sul State), during the XX century’s first half. It focuses especially the region located southwards the Noroeste do Brasil Railway’s track, a region characterized by activities of cattle ranching and erva-mate (Ilex paraguariensis)

  16. Morphological evolution of z ~ 1 galaxies from deep K-band AO imaging in the COSMOS deep field

    Microsoft Academic Search

    D. Rouan; G. Soucail; O. Le Fèvre; L. Tasca; T. Contini

    2007-01-01

    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~mum) band with typical V˜14 guide stars and 3 h integration time per field. Observed fields are selected within the COSMOS

  17. Uso de imagens LANDSAT como subsídio ao estudo da dispersão de sedimentos na região da foz do rio São Francisco

    Microsoft Academic Search

    João Antonio Lorenzzetti; Eduardo Negri

    The construction of a sequence of water reservoirs along the lower São Francisco river basin has caused a severe change in the supply of water and sediments to the coastal zone. We present in this paper a first attempt to use Landsat data to estimate de Suspended Sediment Content (SSC) of the coastal plume. A simple log model proposed by

  18. Projet de Note aux Comptes Rendus (17 ao^ut 2012) A Cramer-Rao inequality for non differentiable

    E-print Network

    Coudière, Yves

    .rochet@gmail.com Abstract. We compute a variance lower bound for unbiased estimators in statistical models. The construction`ele param´etrique est sup´erieure `a l'inverse de l'information de Fisher. Ce r´esultat datant de 1945 [6 of the bound is related to the original Cram´er-Rao bound, although it does not require the differentiability

  19. JOURNAL DE PHYSIQUEIV ColloqueC3,suppfBmentauJournal de Physique11,Volume3,aoGt 1993

    E-print Network

    Boyer, Edmond

    silicon layers (0.4 pm in thickness) were directly depositedon n+ monocrystalline silicon by thermal (consistingof a thermal SiO, layer of thickness of 150nrn grown on monocrystalline silicon)in order to avoid HTO) Si02. Silicon dioxide obtained by the surface reaction between SiH,Cl, and N,O at 900°C on LPCVD

  20. A Keck LGS AO Search for Brown Dwarf and Planetary Mass Companions to Upper Scorpius Brown Dwarfs

    E-print Network

    Biller, Beth; Liu, Michael; Close, Laird; Dupuy, Trent

    2011-01-01

    We searched for binary companions to 20 young brown dwarfs in the Upper Scorpius association (145 pc, 5 Myr, nearest OB association) with the the Laser Guide Star adaptive optics system and the facility infrared camera NIRC2 on the 10 m Keck II telescope. We discovered a 0.14" companion (20.9+-0.4 AU) to the <0.1 MJup object SCH J16091837-20073523. From spectral deconvolution of integrated-light near-IR spectroscopy of SCH1609 using the SpeX spectrograph (Rayner et al. 2003), we estimate primary and secondary spectral types of M6+-0.5 and M7+-1.0, corresponding to masses of 79+-17 MJup and 55+-25 MJup at an age of 5 Myr and masses of 84+-15 MJup and 60+-25 MJup at an age of 10 Myr. For our survey objects with spectral types later than M8, we find an upper limit on the binary fraction of <9% (1-sigma) at separations of 10 -- 500 AU. We combine the results of our survey with previous surveys of Upper Sco and similar young regions to set the strongest constraints to date on binary fraction for young subste...

  1. Visita cinco museos que formen parte de la Institucin Smithsonian para celebrar los 100 aos de las Girl Scouts.

    E-print Network

    Mathis, Wayne N.

    las Girl Scouts. Juliette Gordon Low de Edward Hughes, 1887 u Galería Nacional del Retrato, Americanos del Siglo XX: 1900-1930, 3er piso -- Juliette Gordon Low fundó las Girl Scouts en 1912 y creía en la. ¿Qué valores de las Girl Scouts pusiste en práctica? ¿Sabías qué...? Anna Maria Chávez es la líder de

  2. Opto-Mechanical Design of ShaneAO: the Adaptive Optics System for the 3-meter Shane Telescope

    E-print Network

    Ratliff, Christopher; Gavel, Donald; Kupke, Renate; Dillon, Daren; Gates, Elinor; Deich, William; Ward, Jim; Cowley, David; Pfister, Terry; Saylor, Mike

    2014-01-01

    A Cassegrain mounted adaptive optics instrument presents unique challenges for opto-mechanical design. The flexure and temperature tolerances for stability are tighter than those of seeing limited instruments. This criteria requires particular attention to material properties and mounting techniques. This paper addresses the mechanical designs developed to meet the optical functional requirements. One of the key considerations was to have gravitational deformations, which vary with telescope orientation, stay within the optical error budget, or ensure that we can compensate with a steering mirror by maintaining predictable elastic behavior. Here we look at several cases where deformation is predicted with finite element analysis and Hertzian deformation analysis and also tested. Techniques used to address thermal deformation compensation without the use of low CTE materials will also be discussed.

  3. Opto-mechanical design of ShaneAO: the adaptive optics system for the 3-meter Shane Telescope

    NASA Astrophysics Data System (ADS)

    Ratliff, C.; Cabak, J.; Gavel, D.; Kupke, R.; Dillon, D.; Gates, E.; Deich, W.; Ward, J.; Cowley, D.; Pfister, T.; Saylor, M.

    2014-07-01

    A Cassegrain mounted adaptive optics instrument presents unique challenges for opto-mechanical design. The flexure and temperature tolerances for stability are tighter than those of seeing limited instruments. This criteria requires particular attention to material properties and mounting techniques. This paper addresses the mechanical designs developed to meet the optical functional requirements. One of the key considerations was to have gravitational deformations, which vary with telescope orientation, stay within the optical error budget, or ensure that we can compensate with a steering mirror by maintaining predictable elastic behavior. Here we look at several cases where deformation is predicted with finite element analysis and Hertzian deformation analysis and also tested. Techniques used to address thermal deformation compensation without the use of low CTE materials will also be discussed.

  4. Antifungal Activity of a Phytoterpenoid (AOS-A) Isolated from Artabotrytis odoratissimus on Spore Germination of Some Fungi

    PubMed Central

    Singh, D. K.; Basha, S. Ameer; Sarma, B. K.; Pandey, V. B.

    2006-01-01

    Phytoterpenoid isolated from Artabotrytis odoratissimus inhibited spore germination of some plant pathogenic as well as saprophytic fungi e.g. Alternaria alternata, A. solani, Cercospora sp., Curvularia maculans, C. pennisetti, Fusarium udum, Helminthosporium echinochlova, H. frumentacie, H. penniseti and Ustilago cynodontis. In Curvularia maculans and H. frumentacie, spore germination was completely inhibited at 2000 ppm. However, Curvularia maculans and C. pennisetti showed considerable sensitivity to this chemical even at 500 ppm. PMID:24039483

  5. JOURNAL DE PHYSIQUE Colloque C5, supplement au nos, Tome 46, aoQt 1985 page C5-607

    E-print Network

    Paris-Sud XI, Université de

    a drop-weight machine a t s t r a i n rates of ca. 5 x lo3 s-'. A novel technique using heat sensitive temperature associe B une deformation rapide. Abstract - A direct impact Kolsky bar has been used t o obtain a r l i e s t days of S p l i t Hopkinson Pressure Bar (SHPB) testing / I / , l i t t l e data

  6. Art.1a-O Cunculodo cursode Fisioterapia-Bacharelado,realizadonosperodosmatunoe vespertino, constitudopelos seguintesmdulos,prticaseducavas,prticaspr-

    E-print Network

    Paraná, Universidade Federal do

    RESOLVE: Art.1a- O Cunículodo cursode Fisioterapia- BachareladoODO B.I.rNTRODUçÃOÀrrSrOrenAPtAil MorfoÍuncionalll EstratégiasMetodológicas- FisioterapiaÍuncionalll FisioterapiaAquática TerapíaManualAvançada E. FUNDAMENTOSTEóRICOSPRÁilCOS5" PERíODO E.l. AVALIAç

  7. Ao. Prof. Dr. Robert Weber ad personam: born in Vienna, Austria, 1958, June 27, married, 1 child

    E-print Network

    Schuh, Harald

    , Geodynamics 2001-2002 Analysis Coordinator of the International GPS Service (IGS) 1999-2003 Chair of the IAG-Group 6/4 `Solid Earth Tides in Space Geodetic Techniques ­ GPS/GLONASS` 2003-2007 Chair of the IAG SG 1 Network RTK and Atmosphere Monitoring' since 2003 Chair of the IGS-GNSS Working Group since 2001 Member

  8. Feature Detection and Matching in Images with Radial Distortion Miguel Lourenco, Jo~ao P. Barreto and Abed Malti

    E-print Network

    Barreto, Joao

    -of-view. This article proposes modifications to the Scale Invariant Feature Transform (SIFT), that improve the repeata outperforms explicit distortion correction using image rectification. I. INTRODUCTION The Scale-Invariant Feature Transform (SIFT) [1] enables keypoint detection and description in conventional perspec- tive

  9. 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

    ...Flood Control Project, Wailuku, Maui, HI AGENCY: Department of the Army, U.S...Flood Control Project, Wailuku, Maui, HI. This effort is being proposed under Section...CEPOH-PP-C), Building 230, Fort Shafter, HI 96858- 5440. Submit electronic...

  10. Effect of space exposure of some epoxy matrix composites on their thermal expansion and mechanical properties (AO 138-8)

    NASA Technical Reports Server (NTRS)

    Jabs, Heinrich

    1991-01-01

    The experiment objectives are: to detect a variation of the coefficient of thermal expansion (CTE) of composite samples; to detect an evolution of mechanical properties; to compare the behavior of two epoxy resins. The CTE is measured by interferometric method in a vacuum chamber. The following mechanical tests are achieved on the samples: interlaminar shear strength; flexural strength; flatwise tensile strength. The results are reported.

  11. "2011 -Ao del Trabajo Decente, la Salud y Seguridad de los Trabajadores" Buenos Aires, 30 de noviembre de 2011

    E-print Network

    Maguitman, Ana Gabriela

    profesionales técnicos. Éstos se entrevistaron con autoridades, docentes, alumnos y personal administrativo de miembros de todos los comités de pares, se brindaron informes sobre las carreras en proceso de evaluación y proceso de acreditación y el Profesorado en Computación (R.M.2053/98). La matrícula total de las tres

  12. "2011 -Ao del Trabajo Decente, la Salud y Seguridad de los Trabajadores" Buenos Aires, 30 de noviembre de 2011

    E-print Network

    Maguitman, Ana Gabriela

    profesionales técnicos. Éstos se entrevistaron con autoridades, docentes, alumnos y personal administrativo de miembros de todos los comités de pares, se brindaron informes sobre las carreras en proceso de evaluación y deberá someterse a una segunda fase del proceso de acreditación. Como resultado de la evaluación que en

  13. Learning Consensus in Adversarial Environments Kyriakos G. Vamvoudakis, Luis R. Garcia Carrillo, Jo~ao P. Hespanha

    E-print Network

    California at Santa Barbara, University of

    of California, Santa Barbara, CA 93106-9560 USA ABSTRACT This work presents a game theory-based consensus disturbance to the dynamics. Given the presence of enemy components and the possibility of malicious cyber making framework that is robust to possible cyber attacks, which has an advantage over centralized

  14. Name: Antonio Carlos Gardel Leit~ao Adresse: Friedr. Wilh. v. SteubenStr. 90, App. 1

    E-print Network

    Leitão, Antonio

    S (September 1993) Seit Oktober 1993 Doktorand in der Arbeitsgruppe Informatik der Johann Wolfgang Goethe) Hochschulbildung: M¨arz 1986 ­ Dezember 1989 BSc. in Informatik an der Bundesuniversit¨at von Rio de Ja- neiro (Brasilien) Titel der BSc. Thesis: Die nichtlineare Schr¨odinger Glei- chung und die Ausbreitung von LASER

  15. Microwelding (or cold-welding) of various metallic materials under the ultra-vacuum LDEF experiment AO 138-10

    NASA Technical Reports Server (NTRS)

    Assie, Jean-Pierre; Conde, Eric

    1992-01-01

    The FRECOPA experimentation, as part of the Long Duration Exposure Facility (LDEF) mission, of mechanical and electrical parts of spacecraft in space ultra-vacuum has demonstrated freedom from any cold welding including microweld effects. This, as theorized, is due to integrity in space of the earthly grown oxygen layer. A further experimentation, a dynamic one this time, could provide a wealth of scientific data, yielding reliable material selecting criteria.

  16. Asunto : OFERTA DE CURSOS DE INGLS DE VERANO PARA CHICOS DE 4 A 18 AOS CON DESCUENTOS EXCLUSIVOS

    E-print Network

    Oro, Daniel

    Asunto : OFERTA DE CURSOS DE INGLÉS DE VERANO PARA CHICOS DE 4 A 18 AÑOS CON DESCUENTOS EXCLUSIVOS a chicos de 4 a 18 años, las propuestas más originales en sus cursos residenciales de inglés y deportes durante el verano. Estos intensivos programas lingüísticos, únicos en Europa, son cursos residenciales y

  17. SPATIOTEMPORAL MODELING SEPARABILITY NONSEPARABILITY IRISH WIND DATA EXTENDING THE MODEL CONCLUSIONS MODELOS ESPACO-TEMPORAIS N ~AO

    E-print Network

    Liu, I-Shih

    SPATIOTEMPORAL MODELING SEPARABILITY NONSEPARABILITY IRISH WIND DATA EXTENDING THE MODEL SEPARABILITY NONSEPARABILITY IRISH WIND DATA EXTENDING THE MODEL CONCLUSIONS 1 SPATIOTEMPORAL MODELING Introduction Covariance modeling 2 SEPARABILITY Properties and definition 3 NONSEPARABILITY Mixture approach

  18. esde que Johnvon Neumanny OskarMorgensten crearan la teora de juegos en los a~os cuarenta,

    E-print Network

    Colet, Pere

    uno menor, como la posesión ilegal de armas. Ante esta situación, el juez ofrece a cada uno de los dos confiesa, os encerraremos por posesión de armas 1 año. Finalmente. si ambos confesáis, seréis condenados

  19. Adaptando Vericador es de Modelos para a Gerac ‚ ò ao Autom· atica de Objetivos de Teste para Sistemas Reativos

    Microsoft Academic Search

    Daniel Aguiar da Silva; D. L. Machado

    Test purposes are properties that specify behaviours an implementa- tion under test (IUT) should exhibit. Such properties are usually specied th- rough analyses performed over a model for the IUT. When performed over for- mal specications, these analyses can be automated through formal techniques, such as model checking. This paper presents the adaption of the algorithms of a model checker

  20. Laura Navarro Noriega Sntesis profesional Casi veinte aos de experiencia en el rea de educacin artstica y ambiental

    E-print Network

    Medellín, Rodrigo

    . CURSO DE VERANO DE EDUCACION AMBIENTAL. Creación, organización y coordinación del 1er y 2º cursos de Danza del Conjunto Cultural Ollin Yoliztli. · Realización del proyecto de Investigación "LA EDUCACION EDUCACION MUSICAL INFANTIL. Sala Hermilo Novelo del Conjunto Cultural Ollin Yoliztli, del 22 al 25 de

  1. La celebracin de los quince aos como rito de salida de la infancia para las chicas en el Per

    E-print Network

    detrimento de la familia y del parentesco, en particular a través de las fiestas juveniles y los viajes al vida de las chicas porque introduce un corte en la continuidad del tiempo en relación con cierto orden finalizando los estudios en el colegio (Olthoff, 2006: 128). Este artículo descifra en un primer tiempo la

  2. SIMS chemical analysis of extended impact features from the trailing edge portion of experiment AO187-2

    NASA Technical Reports Server (NTRS)

    Amari, Sachiko; Foote, John; Simon, Charles; Jessberger, Elmar K.; Lange, Gundolf; Stadermann, Frank; Swan, Pat; Walker, Robert M.; Zinner, Ernst

    1992-01-01

    One hundred capture cells from the trailing edge, which had lost their cover foils during flight, were optically scanned for extended impact features caused by high velocity projectiles impinging on the cells while the foils were still intact. Of the 53 candidates, 24 impacts were analyzed by secondary ion mass spectroscopy for the chemical composition of the deposits. Projectile material was found in all impacts, and at least 75 percent of them appear to be caused by interplanetary dust particles. Elemental ratios are fractionated, with refractory elements enriched in the impacts relative to interplanetary dust particles collected in the stratosphere. Although this could be due to systematic differences in the compositions, a more likely explanation is volatility fractionation during the impact process.

  3. Degree Major Description TotalSchool Dept AOS UNCG 2009-10 Doctoral Degree Recipients By Term

    E-print Network

    Saidak, Filip

    Exer. & Sport Sci(ED D) 11HE KIN G319 EDD KINS Kinesiology (ED D) 11HE KIN G335 PHD EXSS Exercise GEOG Geography (PHD) 51 2 2AS GEO G746 Department total 51 2 2 PHD PSYC Psychology(PHD-Clinical) 75 2AS PSY G185 PHD PSYC Psychology(PHD-Cognitive) 21 1AS PSY G799 PHD PSYC Psychology(PHD-Developmental) 11

  4. Tendência histórica de preços pagos ao produtor na agricultura de grãos do Rio Grande do Sul, Brasil

    Microsoft Academic Search

    Renato Santos de SouzaI; João Garibaldi Almeida Viana

    2007-01-01

    This research examines the historical evolution of prices paid to farmers for the most important agricultural products in Rio Grande do Sul for the last three decades, by giving special attention to the changes in prices that occurred since the nineties, and mainly after the monetary stabilization obtained with the \\

  5. [The Juniper Gardens Parent Cooperative Nursery.] Final Progress Report for OEO CAP Grant CG-8474 A/O.

    ERIC Educational Resources Information Center

    Juniper Gardens Children's Project, Kansas City, MO.

    Thirty children and their mothers from a poverty area of Kansas City enrolled in a Head Start parent cooperative nursery school. The mothers actively participated in a parent-training program consisting of tutorial training in which a series of lessons designed to teach preacademic concepts and skills to the children was presented to the mothers.…

  6. Non--Monotonic reasoning about and within spatial Joaquim N. Apar'icio Jo~ao P. Santos

    E-print Network

    Dix, Juergen

    of spatial autocorrelation. The consideration of time in spatial data has been accounted for different types technology is still missing. Validation is always necessary with field data or alternative data sources objects and relations among them, as well as reasoning with them are still missing. The image

  7. JOURNALDEPHYSIQUEIV Woque C3,suppl6mentauJournal de Physique 11,Volume 3, aoGt1993

    E-print Network

    Paris-Sud XI, Université de

    ). 1. INTRODUCTION Silicon carbide has attracted considerable interest in several fields of science, because the material is directly obtained by thermal decomposition of raw gases. Alkyl-silicon compounds:1993345 #12;330 JOURNALDE PHYSIQUEIV 2. ELABORATION OF THE COATINGS A vertical hot-wall CVD reactor was used

  8. Fatores Intervenientes Associados ao Abandono do Futsal em Adolescentes Intervenients factors related to futsal dropout among adolescents

    Microsoft Academic Search

    Pedro Curi Hallal; Rafael Ribeiro Nascimento; Luíse Hackbart; Aírton José Rombaldi

    HALLAL, P.C., NASCIMENTO, R.R., HACKBART, L. ROMBALDI, A.J. Intervenients factors related to futsal dropout among adolescents. R. bras. Ci.e Mov. 2004; 12(3): 27-32. Regular sports practice is a common behavior during childhood and early adolescence, but a marked decline is observed after this period. This study aims to detect some psychological factors related to the futsal dropout among adolescents. One

  9. Multifrequency Observations of the Gamma-Ray Blazar 3C 279 in Low-State during Integral AO-1

    E-print Network

    W. Collmar; M. Böttcher; V. Burwitz; T. Courvoisier; S. Komossa; P. Kretschmar; E. Nieppola; K. Nilsson; T. Ojala; K. Pottschmidt; M. Pasanen; T. Pursimo; A. Sillanpää; L. Takalo; M. Tornikoski; H. Ungerechts; E. Valtaoja; R. Walter; R. Webster; M. Whiting; K. Wiik; I. Wong

    2004-10-12

    We report first results of a multifrequency campaign from radio to hard X-ray energies of the prominent gamma-ray blazar 3C 279 during the first year of the INTEGRAL mission. The variable blazar was found at a low activity level, but was detected by all participating instruments. Subsequently a multifrequency spectrum could be compiled. The individual measurements as well as the compiled multifrequency spectrum are presented. In addition, this 2003 broadband spectrum is compared to one measured in 1999 during a high activity period of 3C 279.

  10. Stimulatory effect of Leonurus artemisia (I-Mu Ts'ao) on the contraction of human myometrium in vitro

    Microsoft Academic Search

    Y. C. Kong; K. H. Ng

    1974-01-01

    Résumé Leonurus artemisiae, l'agripaume chinoise, est applicable comme émmenagogue selon une tradition millénaire chinoise. L'élément efficient est la léonurine. L'extrait de léonurine par l'alcool méthanolique acidifié a un effet stimulant dans la myométrie humaine in vitro.

  11. Refractive Outcomes of Three-Port Lens-Sparing Vitrectomy for Retinopathy of Prematurity (An AOS Thesis)

    PubMed Central

    Holz, Eric R.

    2009-01-01

    Purpose: To study the refractive outcomes of 3-port lens-sparing vitrectomy (LSV) for subtotal retinal detachments due to retinopathy of prematurity (ROP). Lens-sparing vitrectomy may provide superior refractive outcomes by limiting induced myopia of prematurity. Methods: This is a retrospective, consecutive, nonrandomized, comparative (paired eye) study. Entrance criteria were previous complete ablative laser for threshold ROP in both eyes, followed by LSV in one eye for stage 4A traction retinal detachment. Both eyes then maintained complete retinal attachment. Main outcome variables were cycloplegic refraction, keratometry, and biometric values for axial length, lens thickness, and anterior chamber depth. Results: Nine patients met inclusion criteria. Lens-sparing vitrectomy eyes were significantly less myopic than control eyes (?6.78 D vs ?10.33 D, P < .005). The reduction in myopia in LSV eyes was predominantly due to increased anterior chamber depth (3.81 mm ± 0.217 vs 2.96 mm ± 0.232, P < .005). There was a minor contribution from reduced corneal power in LSV eyes (43.89 D ± 0.253 vs 44.20 D ± 0.265, P < .005). There was a minor negative impact from increased lens thickness in LSV eyes (3.85 ± 0.32 mm vs 3.74 ± 0.31, P < .005). There was no significant difference in axial length or lens power between the LSV and control groups. Conclusions: The data demonstrate that infant eyes undergoing 3-port LSV for stage 4A ROP develop less myopia than fellow eyes treated with laser alone. The difference is due to posterior displacement of the lens-iris diaphragm with a smaller contribution from reduced corneal power. The reduction in myopia may improve functional outcomes following 3-port LSV for stage 4A ROP. PMID:20126504

  12. JOURNAL DE PHYSIQUEIV ColloqueC3,supplementau Journal de Physique 11,Volume 3, aoQt1993

    E-print Network

    Boyer, Edmond

    in CVD processes. It was found that such accessible and inexpensive lanthanide 6-diketonates ~ O(H20, pH 7 ) Hydrolysis and decomposition of these compounds occur when heated: L n ( a c decomposition of Y(acacI3 3H20 was shown to give Y4(acac)10(OH)2[41. The mixed ligand complex formation have

  13. Inhibidores de la Síntesis de Aminoácidos Aromáticos

    NSDL National Science Digital Library

    En esta lección se detallarán los procesos bioquímicos que son afectados por los herbicidas que inhiben la síntesis de aminoácidos en las plantas. Se describirá también la importancia de los aminoácidos y las proteínas. De igual manera, se presentará un estudio detallado del herbicida glifosato [N-(fosfonometil)-glicina], incluyendo los avances hechos por la biotecnología.

  14. JOURNAL DE PHYSIQUE Colloque C5, supplbment au n08, Tome 46, aoQt 1985 page C5-343

    E-print Network

    Paris-Sud XI, Université de

    PHENOMENOLOGIQUE D'ECAILLAGE D'UN VERRE PYREX J. Cagnoux Centre d'Etudes de Gramat, 46500 Gramat, France &sum& - L'haillage d'un verre pyrex est &6lis6 dans le cadre de la &- nique de l'endcmmgement . Un nod&le ph6 cau- s8s h une cible en verre, et plus particuli&rmnt un verre pyrex, par l'inpact de projectiles anh

  15. PROVES D'ACCS A LA UNIVERSITAT PER A MAJORS DE 25 ANYS PRUEBAS DE ACCESO A LA UNIVERSIDAD PARA MAYORES DE 25 AOS

    E-print Network

    Escolano, Francisco

    . LEXETEXT Ein Brief Liebe Claudia, jetzt lebe ich schon 2 Monate in der Schweiz. Vieles ist hier anders als seit 3 Monaten in der Schweiz: _________________________ (Zeile: ___________). b) Ulla kocht sehr gut es nach 1,2,3,4 weiter? (a, b oder c?) (4X0,5=2P): 1) In der Schweiz gibt es nach dem Essen immer a

  16. Intravitreous Bevacizumab in the Treatment of Macuar Edema from Branch Retinal Vein Occlusion and Hemisphere Retinal Vein Occlusion (An AOS Thesis)

    PubMed Central

    Fish, Gary Edd

    2008-01-01

    Purpose To compare intravitreous bevacizumab to other current treatments of branch retinal vein occlusion (BRVO) and hemisphere retinal vein occlusion (HRVO) with consideration to visual outcome, cost, convenience, and risk of treatment. Methods This is a retrospective chart review from a large referral retina practice. The data comprise 56 patients with BRVO and HRVO treated by intravitreous bevacizumab, with and without intravitreous triamcinolone acetonide. Initial visual acuities at the time of first bevacizumab injection, best acuities through the follow-up time, final acuity at last visit before review, initial macular thickness, and final macular thickness were measured. Changes in vision and thickness were calculated, as were the percentage of eyes improving, stabilizing, and worsening. Results The data were compared to composite data derived from several current treatments of BRVO. The subgroup of 39 eyes that received only bevacizumab without triamcinolone acetonide had the most improvement in vision. The median change in visual acuity was 1.5 lines (P = .012) over a mean follow-up of 8.8 months. Twenty-three eyes (59%) improved visually, with 20 eyes (51%) improving 2 or more lines. These results are similar to those for eyes that received argon grid laser and chorioretinal anastomosis, but are worse than in eyes that received arteriovenous adventitial sheathotomy, macular decompression surgery, and intravitreous triamcinolone acetonide. Conclusions Visual benefit from intravitreous bevacizumab compares well against laser treatments for BRVO and HRVO but not as well opposed to surgical techniques and intravitreous triamcinolone acetonide. Intravitreous bevacizumab injection has a risk, cost, and convenience profile that is favorable. PMID:19277242

  17. Fatores limitantes ao crescimento do capim-Tanzânia em um sistema agrossilvipastoril com eucalipto, na região dos Cerrados de Minas Gerais

    Microsoft Academic Search

    Carlos Mauricio Soares de Andrade; Rasmo Garcia; Laércio Couto; Odilon Gomes Pereira

    2001-01-01

    A study was conducted in an agrosilvopastoral system, constituted by Eucalyptus urophylla and Panicum maximum cv. Tanzânia-1, to verify the hypothesis that there were other factors, besides the low light availability, affecting the norma l growth of the grass, four years after its introduction in the system. A NPK fertilization field trial was carry out, using the randomi zed block

  18. JOURNAL DE PHYSIQUE Colloque C5, supplCment au n08, Tome 46, aoQt 1985 page C5-405

    E-print Network

    Paris-Sud XI, Université de

    s composites renforces par des tissus de carbone, Kevlar ou verre sont presentees. On determine l e dbformation. Al'inverse du comportement des composites carbone e t Kevlar, on observe dans l e cas des, Kevlar and glass fibre woven-reinforced polyester resin compo- sites and the variation of modulus

  19. The Visual Difficulties of Selected Artists and Limitations of Ophthalmological Care During The 19th and Early 20th Centuries (An AOS Thesis)

    PubMed Central

    Ravin, James G.

    2008-01-01

    Purpose To investigate the effects of eye diseases on several important artists who have been given little attention from a medical-historical viewpoint. The examples chosen demonstrate problems artists have had to face from different types of eye disease, including cataract, glaucoma, and retinal diseases. The ophthalmological care provided is described in terms of scientific knowledge at the time. Methods Investigation of primary and secondary source material. Discussion with art historians and ophthalmic historians. Examination of work by the artists. Results Artists can be markedly affected by ocular diseases that change their ability to see the world. The individuals described here worked during the 19th century and first half of the 20th century. Homer Martin suffered from cataracts, and his works reveal changes in details and color as he aged. Henri Harpignies, who had an extremely long career, undoubtedly had cataracts and may also have had macular degeneration. Angle-closure glaucoma blinded Jules Chéret. Auguste Ravier suffered from neovascular glaucoma in one eye and was able to work with his remaining eye, which developed a cataract. Louis Valtat suffered from what was in all likelihood open-angle glaucoma, but specific changes due to this disease are not apparent in his work. Roger Bissière developed glaucoma and did well following filtration surgery. George Du Maurier lost one eye from what was probably a retinal detachment and later suffered from a central retinal problem in the other eye. Conclusions Diseases of the eye may profoundly influence artists by altering their perception of the world. The specific effects may vary, depending on the disease, its severity, and the psychology of the artist. Cataracts typically affect an artist’s ability to depict color and detail. The effect of glaucoma generally depends on whether central vision is preserved. Disease that affects the center of the retina has a substantial effect on an artist’s ability to depict fine details. Ophthalmological care was limited during the lifetimes of the artists under consideration, by comparison to 21st century standards. When medical or surgical therapy was ineffective, the most important thing a physician could offer these artists was consolation against anxiety and depression. PMID:19277248

  20. REU, Sorocaba, SP, v. 36, n. 3, p. 43-75, dez. 2010 43A REGIO DO JARI, DO EXTRATIVISMO AO AGRONEGCIO: AS CONTRADIES DO

    E-print Network

    Paris-Sud XI, Université de

    EXTRACTIVISM TO AGRO-BUSINEES: THE CONTRADICTIONS OF ECONOMIC DEVELOPMENT IN THE AMAZON FOREST. A CASE STUDY as a region dominated by the extractivism of natural forest resources, the Jari river region lives a radical

  1. ISBN Titulo Autor Ao Enlace a texto completo 9780123735539 Encyclopedia of Marine Mammals 2009 http://www.sciencedirect.com/science/book/9780123735539

    E-print Network

    Autonoma de Madrid, Universidad

    ://www.sciencedirect.com/science/book/9780080448626 9780080556093 Wildland Fires and Air Pollution Andrzej Bytnerowicz, Michael Arbaugh, Allen Riebau://www.sciencedirect.com/science/book/9780080952017 9780123736314 Models for Planning Wildlife Conservation in Large Landscapes Joshua Millspaugh

  2. 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

    Wiegner, Tracy N.

    . United Nations Declaration on the Rights of Indigenous Peoples VII. Native Hawaiians at the University will not succeed without the support and commitment of collective minds and spirits. This plan lays out a path Introduction He keiki mea kupuna ­ It shows that the child has a grandparent. This lelo Noeau (wise saying

  3. Cyclic Crack Growth Testing of an A.O. Smith Multilayer Pressure Vessel with Modal Acoustic Emission Monitoring and Data Assessment

    NASA Technical Reports Server (NTRS)

    Ziola, Steven M.

    2014-01-01

    Digital Wave Corp. (DWC) was retained by Jacobs ATOM at NASA Ames Research Center to perform cyclic pressure crack growth sensitivity testing on a multilayer pressure vessel instrumented with DWC's Modal Acoustic Emission (MAE) system, with captured wave analysis to be performed using DWCs WaveExplorerTM software, which has been used at Ames since 2001. The objectives were to document the ability to detect and characterize a known growing crack in such a vessel using only MAE, to establish the sensitivity of the equipment vs. crack size and / or relevance in a realistic field environment, and to obtain fracture toughness materials properties in follow up testing to enable accurate crack growth analysis. This report contains the results of the testing.

  4. Comparação do desempenho funcional de crianças portadoras de síndrome de Down e crianças com desenvolvimento normal aos 2 e 5 anos de idade

    Microsoft Academic Search

    Marisa Cotta Mancini; Priscila Carvalho e Silva; Sabrina Corrêa Gonçalves; Simone de Medeiros Martins

    2003-01-01

    Comparison of functional performance among children with Down Syndrome and children with age- Comparison of functional performance among children with Down Syndrome and children with age- Comparison of functional performance among children with Down Syndrome and children with age- Comparison of functional performance among children with Down Syndrome and children with age- appropriate development at 2 and 5 years of

  5. JOURNAL DE PHYSIQUE Colloque C5, suppl6ment au nos, Tome 46, aoQt 1985 page C5-219

    E-print Network

    Paris-Sud XI, Université de

    OF OPTO-ELECTRONIC COMPONENTS FOR THE REGISTRATION OF CRACK TIP BEHAVIOUR UNDER DYNAMICAL LOADING hitherto not possible. The same capacity, however, asks for multiple redundant EMP-free steering on dynamic fracture mechanics performed with the aid of this machine, as well as with several opto-electronic

  6. PROVES D'ACCS A LA UNIVERSITAT PER A MAJORS DE 25 ANYS PRUEBA DE ACCESO A LA UNIVERSIDAD PARA MAYORES DE 25 AOS

    E-print Network

    Escolano, Francisco

    whether violent teenagers are created by a violent childhood. Hamsters have in their brains the same show that when the brain chemistry in young hamsters is affected by fear, the hamsters become, unemployment, affected, treated, findings, pets, blamed, imprisonment, fell, carried out, sentenced, brains

  7. JOURNAL DE PHYSIQUE Colloque C5, suppldment au n08, Tome 46, aoDt 1985 page C5-25 7

    E-print Network

    Paris-Sud XI, Université de

    of elastic-plastic solid Ill]. Atluri e t al. 112-151 presented a moving-singular-element procedure determined the dynamic fracture toughness, KID: VS the crack speed, g, relations for various specimens PHYSIQUE In this paper, the dynamic crack propagation in finite elastic solid is analyzed by using

  8. 1pAO5. Calibration trials with multibeam sonars. Dezhang Chu, Kenneth G. Foote Woods Hole Oceanogr. Inst., Woods Hole, MA

    E-print Network

    Russell, Daniel A.

    , Arthur Sale School of Computing, Univ. of Tasmania, Sandy Bay Campus, Hobart 7005, Tasmania, Australia, bart@sonardata.com , and Tim Pauly Sonardata Pty. Ltd., Tasmania, Australia Simulation and modeling

  9. JOURNAL DE PHYSIQUE Coiloque C5, suppl6ment au n08, Tome 46, aoOt 1985 page C5-591

    E-print Network

    Paris-Sud XI, Université de

    machine has its advantages and disadvantages: drop weight testing machines attain very large sizes if high TESTING WITH A LARGE SCALE 33 MJ ROTATING DISK IMPACT MACHINE K. Kussmaul, C. Zimermann and W. I s s l e r or explosive energy storage. From this, the following machine designs have emerged: - drop weight or pendulum

  10. European Photovoltaic Solar Energy Conference, Valencia, Spain, 6-10 September 2010, 2AO.1.6 INDUSTRIALLY RELEVANT Al2O3 DEPOSITION TECHNIQUES

    E-print Network

    for the second half-reaction: in the thermal ALD process, water vapor is injected into the deposition chamber2O3 rear passivation and 20.7% for cells with thermal ALD-Al2O3. Additionally, we evaluate three-assisted as well as thermal ALD) is li- mited to extremely low deposition rates (

  11. arXiv:1110.6470v1[astro-ph.HE]28Oct2011 The Interplanetary Network Supplement to the Fermi GBM Catalog -An AO-2

    E-print Network

    California at Berkeley, University of

    rate of 325/year does not include magnetar bursts, to which the IPN is also sensitive. We have now 158 GBM bursts with one or two distant spacecraft, and triangulated them to annuli or error boxes×10-7 erg cm-2 , or 1 photon cm-2 s-1 , and detects about 325 cosmic gamma-ray bursts per year. Due

  12. arXiv:1010.4201v1[physics.ao-ph]20Oct2010 Universality of rain event size distributions

    E-print Network

    Neelin, J. David

    of avalanche-like rainfall events [1, 2] and by the nature of the transition to convection in the atmosphere [3 of scale-free avalanche size distributions is reproducible using data from different locations and whether is rainfall. The statistics of rainfall thus contain information about the process of convection and the decay

  13. Response of osteoblastic cells to titanium submitted to three different surface treatments Resposta de células osteoblásticas ao titânio submetido a três diferentes tratamentos de superfície

    Microsoft Academic Search

    Adriana Soares Santiago; Euler Araújo dos Santos; Márcia Soares Sader; Marcelo Felippe Santiago; Gloria de Almeida Soares

    In the complex process of bone formation at the implant-tissue interface, surface properties are rel- evant factors modulating osteoblastic function. In this study, commercially pure titanium (cp Ti) samples were prepared with different surface characteristics using chemical attack with a sulfuric acid\\/hydrochloric acid based solution (treatment A); chemical attack plus anodic oxidation using phosphoric acid (treatment B); and chemical attack

  14. JOURNAL DE PHYSIQUE Colloque C5,supplCrnent au nos,Tome 46,aoQt 1985 page C5-273

    E-print Network

    Paris-Sud XI, Université de

    . Cooper and 0. ~ullum* SRI IntemationaZ, 333 Ravenswood Avenue, Menlo Park, California 94025, U.S.A. R6sum cylindres et des essais d'impact et de pgnbtra- tion de projectiles, afin d'obtenir des indications pour le l'ampleur et la nature de l'endommagement dans la cible pour un domaine de vitesses d'impact. Par

  15. JOURNAL DE PHYSIQUE ColloqueC5, supplCmentau n08,Tome 46,aoQt 1985 page C5-455

    E-print Network

    Paris-Sud XI, Université de

    OF DYNAMIC FLOW CURVE OF METALS A T AMBIENT AND ELEVATED TEMPERATURES BY ROD IMPACT TECHNIQUES* D.C. Erlich and P. chartagnac** SRI InternationaZ, 333 Ravenswood Avenue, Menlo Park, California 94025, U.S.A. ~6sum de section circulaire est percut& k haute vitesse et le profil dgforrng rgsultant de l'impact est

  16. 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

    1894 DESIGN DE UM SISTEMA DE SUPORTE À DECISÃO BASEADO EM MODELOS PARA O TRATAMENTO DE ÁGUA Waldir RESUMO Neste artigo apresentamos uma aplicação da tecnologia de sistemas baseados em modelos dentro do ambiciosa, escolhemos sistemas com base em modelos. Algumas suposições fundamentais de nosso trabalho são

  17. J pHYS NFRANCE 7 ( 1997) colloqueC3, Suppltment au Journal de Physique I11 d'aoQt 1997

    E-print Network

    Paris-Sud XI, Université de

    iron, and 4340 steel, quenched and tempered at 650°C. Punching-shear experiments are performed were tested under punching-shear deformation (Figure 1) utilizing a compressive split Hopkinson bar (CSHB) to generate shear strain rates of roughly 45,000 s-'. The specimen is sheared between a punch

  18. J. PHYS IV FRANCE 7 (1997) ColloqueC3, Supplement au Journal de Physique I11 d'aoM 1997

    E-print Network

    Paris-Sud XI, Université de

    1997-01-01

    with the charge detonation front travel (shown with an arrow in Fig. la) and rotational motion about the sample into this effect have suggested some materials engineering applications and a vortex model for the structure that the cavity formation produced some negative effects from the engineering standpoint and also was a physical

  19. Dynamic turning of 13 cm robot comparing tail and differential drive A.O. Pullin N.J. Kohut D. Zarrouk and R. S. Fearing

    E-print Network

    Fearing, Ron

    with only 2 drive motors and mass of 35 grams including battery and control electronics. For some surface in reaching spaces which are inaccessible for larger robots or are dangerous for people, such as search. Corresponding author: pullin@eecs.berkeley.edu, Dept. of Mechanical Engineering, University of California

  20. 20`eme Congr`es Francais de Mecanique Besancon, 29 ao^ut au 2 septembre 2011 Commande basee vision d'ecoulements fluides

    E-print Network

    Paris-Sud XI, Université de

    ´ee vision d'´ecoulements fluides R. Tatsambon Fomena, C. Collewet Cemagref, 17 avenue de Cucill´e, 35 044 of a fluid flow. This approach does not require the use of an observer to estimate the flow state. Indeed, dense flow velocity maps can be obtained via mature optical flow techniques dedicated to flow

  1. Characteristics of sodium guidestars created by the 50-watt FASOR and first closed-loop AO results at the Starfire Optical Range

    Microsoft Academic Search

    Craig A. Denman; Jack D. Drummond; Mark L. Eickhoff; Robert Q. Fugate; Paul D. Hillman; Steven J. Novotny; John M. Telle

    2006-01-01

    A computer-automated cw sodium guidestar FASOR (Frequency Addition Source of Optical Radiation) producing a single frequency 589-nm beam with up to 50 W for mesospheric beacon generation has been integrated with the 3.5-m telescope at the Starfire Optical Range, Kirtland AFB, New Mexico. Radiance tests have produced a peak guidestar V1 magnitude = 5.1 (~7000 photons\\/s\\/cm2 at zenith) for 30

  2. Degree Major Description TotalFull-time Part-timeSchool Dept AOS FTE Graduate Enrollment by Area of Study Code, School, Department,

    E-print Network

    Saidak, Filip

    PSYC Psychology(MA-Developmental) 10 1AS PSY G812 0.25 MAPHD PSYC Psychology(MA/PHD-Clinical) 1815 3AS Psychology(PHD-Social) 20 2AS PSY G797 1.50 PHD PSYC Psychology(PHD-Developmental) 41 3AS PSY G798 3.25 PHD Psychology(MA Only-Gen Exprtl) 119 2AS PSY G182 10.25 MA PSYC Psychology(MA-Clinical) 10 1AS PSY G183 0.75 MA

  3. Boletn informativo de la Coordinacin de la Investigacin Cientfica Ciudad Universitaria, 6 de diciembre de 2007, ao VII, no. 81 Nuevo Atlas Nacional de Mxico

    E-print Network

    Lovley, Derek

    mercado de trabajo establece la cadena de ese proceso de desigualdades, bajos salarios y escasos ingresos Secretario Administrativo Dr. René Drucker Colín Coordinador de la Investigación Científica El faro, la luz

  4. Observability of linear systems under adversarial attacks* Michelle S. Chong1, Masashi Wakaiki1 and Jo~ao P. Hespanha1

    E-print Network

    Hespanha, João Pedro

    systems can be especially vulnerable to cyber attacks; most particularly remote sensors that can field, in particular in the areas of fault detection and identification (FDI) [7] and game theory [5]. Some of the recent work on the cyber security of control systems has been focused on the effect

  5. JOURNAL DE PHYSIQUE Colloque C5, supplkrnent au n08,Tome 46, aoOt 1985 page C5-475

    E-print Network

    Boyer, Edmond

    s : interpr6tation de l'hugoniot et des chemins de d6capression et msure directe de l'onde de ci- saill-nt. La premiere hplique des impacts nomux, l a d e u x i h des impacts in- c l i n k . La traduction sur l'hugoniot, le ph&&e se traduit par un d&oublanent du front de choc et donc m "coude" sur l'hugoniot. La position

  6. Langmuir 1990,6, 1023-1030 1023 Table 111. Ao, Aso,and K for the Lipid Mixtures GDNT and

    E-print Network

    .4. Conclusions The hydrolyzed lipids GDNTand GDGTextracted from the thermoacidophile S.acidocaldarius do not form/area isotherms of the hydrolyzed lipid mix- tures are representative of liquid-expanded films. The isotherms of the lipids is in an n-shaped configuration is not needed to explain the data. The responses of the hydrolyzed

  7. Hard X-ray pulse profile and period evolution of AO535 + 26 and GX 1 + 4 as observed by the Franco-Soviet Signe satellite experiments

    NASA Astrophysics Data System (ADS)

    Refloch, A.; Chambon, G.; Niel, M.; Vedrenne, G.; Rakhmaninov, Ch. Iu.

    1986-11-01

    The source GX 1 + 4 and an outburst from the recurrent X-ray transient A0535+26 were observed in 1977 December by collimated detectors aboard the Prognoz 6 satellite (Signe 2MP experiment) in the energy range 28-308 keV and aboard the Signe 3 satellite between 27 and 108 keV. The temporal evolution of the pulsation period of these sources (107.22 s and 103.89 s respectively), the variations of the pulsed and total fluxes, and the light curves are given. A temporary disk model for A0535+26 is proposed.

  8. The use of tibial Less Invasive Stabilization System (LISS) plate [AO-ASIF] for the treatment of paediatric supracondylar fracture of femur: a case report

    PubMed Central

    2010-01-01

    Paediatric supracondylar fractures of the femur are not common. The treatment options depend on the age of child, the site of the fracture, the pattern of injury and the surgeon's preference. We report a case of an 11-year old boy who sustained a comminuted displaced supracondylar fracture of the femur and was treated with indirect reduction and internal fixation with the Less Invasive Stabilization System (LISS) tibial plate. PMID:20167094

  9. 21`eme Congr`es Francais de Mecanique Bordeaux, 26 au 30 ao^ut 2013 Strain field measurements in polycrystalline tantalum

    E-print Network

    Paris-Sud XI, Université de

    behaviour (a) (b) Fig. 1 ­ Tensile test at room temperature for three strain rates = 10-4 s-1, = 10-3 s-1 and 10-2 s-1. (a) Complete tensile test, (b) zoom on the first ten percent. The macroscopic stress

  10. Presentacin Entre los das 3 y 14 de junio del ao 1992, se celebr la Conferencia de las Naciones Unidas sobre Medio

    E-print Network

    Escolano, Francisco

    Unidas (ONU) para promover el desarrollo sostenible entendido como mejora de la calidad de vida de la el Desarrollo Sostenible gracias a la aprobación del programa de la Agenda 21 que se fué ejecutando 3400 Fax: (+34) 96 590 3464 Agenda 21UA. Medio Ambiente y Desarrollo Sostenible #12;

  11. Units of Assessment (UOAs) For RAE 2008 there are 15 main panels (A-O) split into 67 Units of Assessment (UOAs).

    E-print Network

    Engineering and Mineral & Mining Engineering 26 Chemical Engineering 27 Civil Engineering 28 Mechanical Biological Sciences 16 Agriculture, Veterinary and Food Science E 17 Earth Systems and Environmental Sciences Research 23 Computer Science and Informatics G 24 Electrical and Electronic Engineering 25 General

  12. New Extinction and Mass Estimates of the Low-mass Companion 1RXS 1609 B with the Magellan AO System: Evidence of an Inclined Dust Disk

    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 P.; Rodigas, Timothy J.; Hinz, Philip; Puglisi, Alfio; Xompero, Marco; Briguglio, Runa

    2015-07-01

    We used the Magellan adaptive optics system to image the 11 Myr substellar companion 1RXS 1609 B at the bluest wavelengths to date (z? and Ys). Comparison with synthetic spectra yields a higher temperature than previous studies of {T}{eff}=2000+/- 100 {{K}} and significant dust extinction of {A}V={4.5}-0.7+0.5 mag. Mass estimates based on the DUSTY tracks gives 0.012–0.015 {M}? , making the companion likely a low-mass brown dwarf surrounded by a dusty disk. Our study suggests that 1RXS 1609 B is one of the ?25% of Upper Scorpius low-mass members harboring disks, and it may have formed like a star and not a planet out at ?320 AU. This paper includes data gathered with the 6.5 m Magellan Clay Telescope at Las Campanas Observatory, Chile.

  13. On the Efficiency of Durable State Machine Replication Alysson Bessani1, Marcel Santos1, Jo~ao Felix1, Nuno Neves1, Miguel Correia2

    E-print Network

    Correia, Miguel

    - sources: parallel logging, sequential checkpointing, and collaborative state transfer. We show the benefits of these techniques experimentally by implementing them in an open-source replication library failures that occur in data centers, causing thousands of servers to crash simultane- ously [13, 15, 30, 33

  14. The potential for oligosaccharide production from the hemicellulose fraction of biomasses through pretreatment processes: xylooligosaccharides (XOS), arabinooligosaccharides (AOS), and mannooligosaccharides (MOS).

    PubMed

    Otieno, Daniel Obed; Ahring, Birgitte Kiaer

    2012-10-01

    Hemicellulosic oligosaccharides are sugar molecules that contain xylose, mannose, and arabinose in variable concentrations ranging from 3 to 10 molecules. These medium and long chain sugars can be classified as non-digestible carbohydrates, thus playing an important role in gastrointestinal health as prebiotics. Their physiological benefits, primarily stimulation of the proliferation of lactic acid bacteria and bifidobacteria in the colon informs their significance as high value nutraceuticals in the food and pharmaceutical industry. In addition they are well known as useful components of important pharmaceutical products. There are two main ways of producing these sugars from biomass, which include enzymatic and non-enzymatic pretreatments. Each of the two processes has advantages and disadvantages. Enzymatic processes are associated with high costs, higher concentration of monomeric sugars, and low oligosaccharide yields while thermo-chemical processes are usually associated with undesirable byproducts such as furfural and lower oligosaccharide yields. In this paper we discuss the benefits and constraints for optimization of different methods for the production of oligosaccharides from biomass. PMID:22940180

  15. J pHYSN FRANCE 7 (1997) ColloqueC3, Supplkment au Journal de Physique I11d'aoQt 1997

    E-print Network

    Boyer, Edmond

    1997-01-01

    . A theoretical formulation based on a quasi-harmonic normal mode representation of the scattered wave energy-harmonic normal model description of the scattering wave energy is developed and compared with phenomenological within the heterogeneous microstructure. An approach to modeling dispersive wave propagation

  16. New Extinction and Mass Estimates of the Low-mass Companion 1RXS 1609 B with the Magellan AO System: Evidence of an Inclined Dust Disk

    E-print Network

    Wu, Ya-Lin; Males, Jared R; Barman, Travis S; Morzinski, Katie M; Follette, Katherine B; Bailey, Vanessa P; Rodigas, Timothy J; Hinz, Philip; Puglisi, Alfio; Xompero, Marco; Briguglio, Runa

    2015-01-01

    We used the Magellan adaptive optics system to image the 11 Myr substellar companion 1RXS 1609 B at the bluest wavelengths to date (z' and Ys). Comparison with synthetic spectra yields a higher temperature than previous studies of $T_\\mathrm{eff}=2000\\pm100\\mathrm{K}$ and significant dust extinction of $A_V=4.5^{+0.5}_{-0.7}$ mag. Mass estimates based on the DUSTY tracks gives 0.012-0.015 Msun, making the companion likely a low-mass brown dwarf surrounded by a dusty disk. Our study suggests that 1RXS 1609 B is one of the 25% of Upper Scorpius low-mass members harboring disks, and it may have formed like a star and not a planet out at 320 AU.

  17. Coordinate expression of AOS genes and JA accumulation: JA is not required for initiation of closing layer in wound healing tubers

    Technology Transfer Automated Retrieval System (TEKTRAN)

    Wounding induces a series of coordinated physiological responses essential for protection and healing of the damaged tissue. Wound-induced formation of jasmonic acid (JA) is important in defense responses in leaves, but comparatively little is known about the induction of JA biosynthesis and its ro...

  18. J. PHYS IV FRANCE 7 (I 997) ColloqueC3, Supplement au Journal de Physique I11d'aoQt 1997

    E-print Network

    Boyer, Edmond

    in the transmitter, the temperature distribution in the furnace, and the positions of the spalling sites of an extensive series of spalling tests with alumina ceramic bars at temperature up to 1500°C, conducted performance ceramics. Numerous tests of the same kind of ceramic bars had been conducted earlier at room

  19. 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

    : Weather and Climate Weather varies day to day and seasonally; it is the condition of the atmosphere the energy radiated from land and ocean surfaces, regulating temperatures and keep Earth habitable. (A: EARTH AND SPACE SCIENCE: Understand the Earth and its processes, the solar system, and the universe

  20. JOURNAL DE PHYSIQUE ColloqueC5,supplmentau n08,Tome 46,aoQt 1985 page C5-307

    E-print Network

    Boyer, Edmond

    is to achieve a better metallurgical under- standing of the adiabatic shear phenomenon that arrnor steels adiabatique que l'on a rencontré à proximité des impacts. Article published online by EDP Sciences