Sample records for tolerante ao glifosato

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

    E-print Network

    Rodrigues, Luís E.T.

    redes de grande escala geogr´afica. Estas redes destinguem-se das redes locais principalmente pelas suas desempenho aceit´avel sobre este tipo de redes. A grande maioria das redes de grande-escala hoje existentes s~ao constitu´idas por aglomerados de redes locais interligados por redes ponto-a-ponto. Para oferecer comunicac

  2. Avaliação de clones de batata tolerantes ao calor

    Microsoft Academic Search

    Alexsandro L. Teixeira; César A. Brasil; César A. T. Benavente

    Evaluation of heat tolerant potato clones. In Brazil there are no cultivars recommended for high temperatures since most of the current cultivars were introduced from temperate countries. The objective of this study was to evaluate the behavior of potato clones under heat stress concerning tuber yield, tubers' dry matter content and qualitative traits of tubers. The experiment was carried out

  3. 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

  4. Unstructured Jo~ao Leit~ao

    E-print Network

    Bonaventure, Olivier

    for Unstructured Overlay Networks Doctoral School Day in Cloud Computing Jo~ao Leit~ao INESC-ID / IST - Lisbon, Bittorrent. VOIP: Skype. IPTV: PPLive. Internet Anonymity: TOR. #12;Topology Management for Unstructured, Gnutella, Bittorrent. VOIP: Skype. IPTV: PPLive. Internet Anonymity: TOR. #12;Topology Management

  5. OPTIMIZAC ~ AO EM REDES

    E-print Network

    Pascoal, Marta Margarida Braz

    OPTIMIZAC¸ ~ AO EM REDES UMA VIS ~ AO GLOBAL Deolinda Dias Rasteiro, Jose Luis Santos, Marta Braz; Optimiza¸c~ao em Redes ­ Uma Vis~ao Global N = fv 1 ; : : : ; v n g j f1; : : : ; ng ­ conjunto de n'os (v; j) Rede (N ; A) ­ grafo (N ; A) com um v'ertice inicial s e um v'ertice terminal t, a cujos arcos

  6. Geratrizes. Dedu c ao

    E-print Network

    Barata, João Carlos Alves

    Capâ?? �tulo 6 Funâ?º câ? oes Geratrizes. Produtâ?? orias Complexas Conteâ?? udo 6.1 Funâ?º câ? oes Geratrizes, as chamadas funâ?º câ? oes geratrizes e as produtâ?? orias complexas infinitas. Trata­se de dois temas nâ? ao de variâ?? avel complexa. Funâ?º câ? oes geratrizes, introduzidas na Seâ?º câ? ao 6.1, pâ?? agina 258

  7. [AO classification of fractures].

    PubMed

    Tanaka, Tadashi

    2003-10-01

    In the AO classification, the diagnosis of a fracture is expressed by its location (bone and segment) and morphological features, which is characterized by the hierarchical organization into triad. This classification is comprehensive and very useful in a daily clinical practice. PMID:15775205

  8. Towards MDD Transformations from AO Requirements into AO Architecture

    Microsoft Academic Search

    Pablo Sánchez; José Magno; Lidia Fuentes; Ana Moreira; João Araújo

    2006-01-01

    Aspect-Oriented (AO) Software Development has been created to offer improved separation of concerns mechanisms. AO concepts first appeared at the programming level and are now being addressed at the early stages of the software\\u000a development life cycle. Currently, there are several AO approaches available for the various software development phases,\\u000a but each one usually encompasses a single phase of the

  9. 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

  10. The JMB Electronics AO Syllabus.

    ERIC Educational Resources Information Center

    Gough, C. E.

    1983-01-01

    Provides background information on and a brief description of the content and aims of the AO syllabus in electronics. The syllabus is divided into six sections: (1) measurement/instruments; (2) materials, devices, and transducers; (3) digital electronics; (4) analog electronics; (5) electronic systems; and (6) electronics impact on…

  11. 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.

  12. Motivac~ao O -Calculus

    E-print Network

    Ayala-Rincón, Mauricio

    Introduzido por Alonzo Church [Chu32] Daniel Lima Ventura Redu¸c~ao do Sujeito para C´alculos de SEs com Tipos Bruijn C´alculos de Substitui¸c~oes Expl´icitas O -Calculus Introduzido por Alonzo Church [Chu32] Kleene´alculos de Substitui¸c~oes Expl´icitas O -Calculus Introduzido por Alonzo Church [Chu32] Kleene e Rosser

  13. Comparing Dynamic AO Systems Ruzanna Chitchyan

    E-print Network

    understand weather and how do the specific AO change support mechanisms (e.g. total, actual, or collected weather and how do the specific AO change support mechanisms affect dynamic system reconfigurability reconfiguration solutions unsatisfactory, dynamic AO research with Java has resorted to byte-code modification (e

  14. Uma Implementac~ao Concorrente de Redes Neurais PCA para Compress~ao de Imagens

    E-print Network

    Pereira, Marcone Corrêa

    Uma Implementac¸~ao Concorrente de Redes Neurais PCA para Compress~ao de Imagens Willian Y. Honda1 dados. Considerando uma rede neural que aproxima os resultados da PCA cl´assica, a principal contribuic¸~ao deste trabalho consiste em apresentar um modelo de implementac¸~ao concorrente para essa rede. Um estudo

  15. Aerosol Observing System (AOS) Handbook

    SciTech Connect

    Jefferson, A

    2011-01-17

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

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

    E-print Network

    Natário, José

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

  17. The Administration on Aging (AoA)

    NSDL National Science Digital Library

    1998-01-01

    The Administration on Aging, U.S. Department of Health and Human Services has a Web page. It contains information about AoA and its programs, information about resources for practitioners, statistical information on the aging, and information for consumers (older persons and their families) including how to obtain services and electronic booklets on aging related issues. It also includes a link to AoA's National Aging Information Center and extensive links to other aging related Web resources.

  18. Standard Triaxial Ellipsoid Asteroids from AO Observations

    NASA Astrophysics Data System (ADS)

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

    2008-09-01

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

  19. ATST and Solar AO state of art

    NASA Astrophysics Data System (ADS)

    Rimmele, Thomas; Woeger, Friedrich; Marino, Jose

    2013-12-01

    The 4 meter aperture Advanced Technology Solar Telescope (ATST) is an ELT for solar astronomy, and as such will address a broad range of science questions that require its AO system to operate in several different observing scenarios. We review the science drivers that lead to the most demanding ATST AO system requirements, such as high Strehl ratios at visible wavelengths, MCAO correction, and photon starved, extended FOV wavefront sensing using large, faint structures at the limb of the Sun. Within the context of exisiting high-order AO systems for solar telescopes we present an overview over the current ATST AO system design and capabilities. Finally, we will describe the widely used post-facto image processing techniques of AO corrected solar imaging and spectroscopic data that are required to achieve the desired spatial resolution especially at the short end (380 nm) of the visible spectrum over ATST's full FOV. We will lay out how these techniques will be supported in the AO system to help ATST achieve its scientific goals.

  20. The Subaru Coronagraphic Extreme-AO Project

    NASA Astrophysics Data System (ADS)

    Martinache, Frantz; Guyon, Olivier

    2009-08-01

    The Subaru Coronagraphic Extreme AO (SCExAO) Project is an upgrade to the newly commissioned coronagraphic imager HiCIAO for the Subaru Telescope, in the context of a massive survey for exoplanets and disks called SEEDS. SCExAO combines a high-performance coronagraph PIAA coronagraph and non-redundant aperture masking interferometry to a MEMS-based wavefront control system to be used in addition to the 188- actuator Subaru Adaptive Optics (AO188) system. The upgrade is designed as a flexible platform with easy access to both pupil and image planes to allow quick implementation of new high-angular resolution techniques, using a combination of interferometry and coronagraphy. The SCExAO system will enhance SEEDS by offering access to smaller separations and improved PSF calibration, and will therefore allow high quality follow-up observations of challenging SEEDS candidates. SCExAO will also enable new science investigations requiring high contrast imaging of the innermost (< 0.2 arc second) surrounding of stars.

  1. The Subaru Coronagraphic Extreme AO Project

    NASA Astrophysics Data System (ADS)

    Martinache, F.; Guyon, O.

    2010-10-01

    The Subaru Coronagraphic Extreme AO (SCExAO) Project is an upgrade to the newly commissioned coronagraphic imager HiCIAO for the Subaru Telescope, in the context of a massive survey for exoplanets and disks called SEEDS. SCExAO combines a high-performance coronagraph PIAA coronagraph and non-redundant aperture masking interferometry to a MEMS-based wavefront control system to be used in addition to the 188-actuator Subaru Adaptive Optics (AO188) system. The upgrade is designed as a flexible platform with easy access to both pupil and image planes to allow quick implementation of new high-angular resolution techniques, using a combination of interferometry and coronagraphy. The SCExAO system will enhance SEEDS by offering access to smaller separations and improved PSF calibration, and will therefore allow high quality follow-up observations of challenging SEEDS candidates. SCExAO will also enable new science investigations requiring high contrast imaging of the innermost (< 0.2 arcsecond) surrounding of stars.

  2. 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.

  3. MEMS Deformable Mirrors in Astronomical AO

    NASA Astrophysics Data System (ADS)

    Bierden, Paul; Cornelissen, Steven; Lam, Charlie; Bifano, Thomas

    2011-09-01

    As the development of adaptive optics instrumentation for Extremely Large Telescopes continues, the need for specialized deformable mirror grows. We report on the development of Boston Micromachines' micro-electromechanical (MEMS) deformable mirrors to meet these needs and the needs of other astronomical AO projects. Specific DM technologies will be discussed including the 4092 element continuous membrane mirror designed and built for the Gemini Planet Imager as well as a 2000 actuator DM being built for general high contrast astronomical AO applications. Also discussed will be a project to design and manufacture a 1021 hexagonal segment (3063 actuator) tip-tilt-piston DM for NASA's Planet Finding Mission. Design considerations, improvements in reliability, and device characteristics will be discussed. Performance results and plans for future mirrors development and how they fit into AO for ELT will be presented.

  4. Uma Comparac~ao Experimental de Metodos de Imputac~ao de Valores Desconhecidos

    E-print Network

    Batista, Gustavo

    ¸~ao ­ Universidade de S~ao Paulo Laborat´orio de Intelig^encia Computacional ­ LABIC Caixa Postal 668, 13560-970 ­ S artificially and treated by 9 different methods. We have evaluated the influence of the treatment methods

  5. Classificac~ao Associativa Utilizando Selec~ao e Construc~ao de Regras: um Estudo Comparativo

    E-print Network

    Batista, Gustavo

    ; e GARSS, que aplica algoritmo gen´etico para selecionar um subconjunto de regras que maxi- mize a medida AUC. Neste trabalho, apresentamos o MORLEA, que utiliza um algoritmo gen´etico multi-objetivo para~ao semelhante a do algoritmo C4.5 Abstract. Associative classification is a hybrid approach that has been veri

  6. Cap'itulo 1 Introduc~ao

    E-print Network

    Earl Hurd desenvolve o conceito de Cel Animation. 1923 Walt Disney utiliza a t'ecnica de combinar primeira vez, combinava som e imagens. 1928 Walt Disney cria o primeiro cartoon com som sincronizado. Personalidades importantes da nossa era, como Thomas Edison, George Eastman, Winsor McCay, Irm~aos Warner e Walt

  7. 1, 1756, 2005 Optimal sites for AO

    E-print Network

    Paris-Sud XI, Université de

    , and M. Dima Alfred Wegener Institute for Polar and Marine Research, Bremerhaven, Germany Received: 15) phe- nomenon (Thompson and Wallace, 1998; Thompson et al., 2000). The AO is the domi- nant mode and Wallace, 1998). The climate impacts are seen over the North Pacific, the North Atlantic, and over

  8. Characterization of an AO-OCT system

    SciTech Connect

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

    2007-07-26

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

  9. Exercicios de Calculo Numerico Zero de Func~ao

    E-print Network

    Cabral, Marco

    pelo menos uma raiz, que n~ao pode ser determinada usando o M´etodo da Bisse¸c~ao. 2. D^e um exemplo de fun¸c~ao f(x), que tenha pelo menos uma raiz, onde o M´etodo de Newton-Raphson n~ao converge. 3. A equa¸c~ao x2 - 7x + 12 = 0 tem 3 e 4 como ra´izes. Considere a fun¸c~ao de itera¸c~ao dada por (x) = x2

  10. Upgrading the Keck AO wavefront controllers

    NASA Astrophysics Data System (ADS)

    Johansson, Erik M.; van Dam, Marcos A.; Stomski, Paul J.; Bell, James M.; Chin, Jason C.; Sumner, Roger C.; Wizinowich, Peter L.; Biasi, Roberto; Andrighettoni, Mario; Pescoller, Dietrich

    2008-07-01

    This paper describes the recent upgrade performed on the W. M. Keck Observatory Adaptive Optics (AO) systems, in which the wavefront sensors and wavefront controllers were replaced with components based on new technology. The performance of the upgraded system has yielded an increase in limiting guide star magnitude, an increased Strehl ratio for both Laser Guide Star (LGS) and Natural Guide Star (NGS) modes, and has significantly improved reliability and maintainability compared to the original system. Moreover, the controller is scalable, allowing for future upgrades and improvements as needed. We present an overview of the project; describe the basic architecture of the new wavefront sensor and controller; discuss some of the unique features of the system, including the closed loop mirror positioning system, custom wavefront sensor optics, and full-frame-rate telemetry server; and conclude with results from engineering and science tests of the new controller on the Keck II AO system.

  11. AO wavefront sensing detector developments at ESO

    NASA Astrophysics Data System (ADS)

    Downing, Mark; Kolb, Johann; Baade, Dietrich; Iwert, Olaf; Hubin, Norbert; Reyes, Javier; Feautrier, Philippe; Gach, Jean-Luc; Balard, Philippe; Guillaume, Christian; Stadler, Eric; Magnard, Yves

    2010-07-01

    The detector is a critical component of any Adaptive Optics WaveFront Sensing (AO WFS) system. The required combination of fast frame rate, high quantum efficiency, low noise, large number and size of pixels, and low image lag can often only be met by specialized custom developments. ESO's very active WFS detector development program is described. Key test results are presented for newly developed detectors: a) the e2v L3Vision CCD220 (the fastest/lowest noise AO detector to date) to be deployed soon on 2nd Generation VLT instruments, and b) the MPI-HLL pnCCD with its superb high "red" response. The development of still more advanced laser/natural guide-star WFS detectors is critical for the feasibility of ESO's EELT. The paper outlines: a) the multi-phased development plan that will ensure detectors are available on-time for EELT first-light AO systems, b) results of design studies performed by industry during 2007 including a comparison of the most promising technologies, c) results from CMOS technology demonstrators that were built and tested over the past two years to assess and validate various technologies at the pixel level, their fulfillment of critical requirements (especially read noise and speed), and scalability to full-size. The next step will be towards Scaled-Down Demonstrators (SDD) to retire architecture and process risks. The SDD will be large enough to be used for E-ELT first-light AO WFS systems. For full operability, 30-50 full-scale devices will be needed.

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

    NASA Astrophysics Data System (ADS)

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

    2013-12-01

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

  13. 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.

  14. Diferentes Metodologias Aplicadas ao Ensino de Astronomia

    NASA Astrophysics Data System (ADS)

    Albrecht, E.; Voelzke, M. R.

    2007-08-01

    Espera-se que o educando ao final da educação básica, adquira uma compreensão atualizada das hipóteses, modelos e formas de investigação sobre a origem e evolução do Universo em que vive. O presente trabalho tem como principal objetivo compreender dentre três práticas pedagógicas adotadas no Ensino de Astronomia, na terceira série do Ensino Médio, da Escola Estadual Colônia dos Pescadores, qual melhor cumpre o papel de formação e aprendizagem para vida. A pesquisa preliminar foi através de um questionário onde o intuito foi diagnosticar o conhecimento já existente acerca do tema em questão. O questionário é composto de vinte questões dissertativas e objetivas, onde os educandos das três turmas envolvidas o responderam. Este trabalho utiliza as seguintes metodologias: a tradicional, onde o professor é um repassador de informações, fazendo uso exclusivo de lousa e giz; a segunda também de forma tradicional, porém com auxílio de multimídia para desenvolvimento das aulas e aterceira sob forma de seminários, elaborados e apresentados pelos educandos, no qual o educador faz apenas as intervenções necessárias. Ao final do trabalho os alunos responderão novamente o questionário inicial para diagnosticar dentre as três metodologias utilizadas qual apresentou melhor resultado. Os resultados preliminares obtidos, já podem ser observados e, dos 119 alunos entrevistados, as respostas obtidas são as mais diversas e evidenciam que a grande maioria nunca teve em sua vida escolar o tema Astronomia. Ao serem questionados se já haviam estudado Astronomia as respostas foram: turma A: sim 43%; turma B: sim: 21%; turma C: sim: 24%. Porém quando questionados a respeito do significado de Astronomia observou-se que: turma A: 100% de acertos; turma B: 64% acertos; turma C: 84% de acertos, demonstrando claramente a aprendizagem em diferentes esferas, não dependendo unicamente da escola. Até o presente momento, verificou-se que há interesse em estudar o tema Astronom! ia entre os educandos.

  15. Deformac~ao e Metamorfose de Imagens usando Simulac~ao de

    E-print Network

    ¸c~oes feitas nesta tese. Agrade¸co a minha fam´ilia, minha m~ae Nunila, meu pai Mariano e meu ir- m~ao Mario, Emilio, Anderson, Maria e Leo Carvalho. (Falta gente eu sei, desculpem, a lista ´e grande e tal vez posso

  16. Cold Friends of Hot Jupiters: AO Survey

    NASA Astrophysics Data System (ADS)

    Ngo, Henry; Knutson, H. A.; Hinkley, S.; Crepp, J. R.; Batygin, K.; Howard, A. W.; Johnson, J. A.; Morton, T. D.; Muirhead, P. S.

    2013-10-01

    “Hot Jupiters” are a class of gas giant planets found in extrasolar systems at very small orbital distances (?0.05 AU). We know that these planets could not have formed at their present locations, but must instead have migrated in from beyond the ice line. One class of proposed migration mechanisms for these planets involve gravitational perturbations from a distant stellar companion. These same processes also provide a natural explanation for the existence of a subset of hot Jupiters that have been observed to have orbits that are highly misaligned with respect to their star's spin axis and/or have large orbital eccentricities. In the "Cold Friends" survey, we search for stellar companions around 51 stars known to host hot Jupiters in order to determine whether stellar companions play an important role in hot Jupiter migration. Our survey consists of a population of stars with planets that have eccentric and/or misaligned orbits as well as a control population of planets with well-aligned and circular orbits. This project searches for companion stars (the "Cold Friends") in three detection modes: radial velocity monitoring, high resolution IR spectroscopy (presented by D. Piskorz et al. at this meeting), and adaptive optics (AO) imaging at infrared wavelengths (presented here). The AO mode is sensitive to the most distant companions (separations of 50-200 AU and beyond) while the other modes are effective at finding companions at smaller separations. We present the results of our AO survey and discuss the binary fraction found in our sample. Out of our total sample of 51 stars, 19 candidate companions (many of which have not been observed before) were directly imaged around 17 stars. We also describe follow-up photometry and astrometry of all detected companions to determine whether or not they are gravitationally bound to the primary planet-hosting star. If such companions are common, it would suggest that perturbations from stellar companions may play a significant role in the evolution of hot Jupiter systems.

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

    E-print Network

    Song, Siang Wun

    Series Cluster Xeon 3.06GHz 1024 processadores (3,755 TFLOPS Linpack) · Posi¸c~ao 97 - Beowulf Cluster HP Xeon 3,06 GHz 1.300 processadores (3,739 TFLOPS Linpack) · Posi¸c~ao 118 - Beowulf Cluster HP Xeon 3,06 GHz 1Series Cluster Xeon 3.06GHz 1024 processadores (3,755 TFLOPS Linpack) · Posi¸c~ao 97 - Beowulf Cluster HP Xeon 3

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

    E-print Network

    Kohayakawa, Yoshiharu

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

  19. The NAO, the AO, and Global Warming: How Closely Related?

    Microsoft Academic Search

    J. L. Cohen; M. Barlow

    2004-01-01

    The North Atlantic Oscillation (NAO) and closely related Arctic Oscillation (AO) strongly affect Northern Hemisphere (NH) surface temperatures with patterns similar to the global warming trend. The NAO and AO have been in a positive trend for much of the 1970s and 1980s with historic highs in the early 1990s, and it has been suggested that they contribute significantly to

  20. Course Material Model in A&O Learning Environment

    Microsoft Academic Search

    Jarkko Levasma; Ossi Nykänen

    2000-01-01

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

  1. Robo-AO: Performance and Characterization at Palomar Observatory

    NASA Astrophysics Data System (ADS)

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

    2013-01-01

    Hosted at the Palomar 60-inch telescope, Robo-AO is the world's first completely autonomous, laser-beacon supported adaptive optics (AO) system, delivering diffraction-limited images in the visible and IR wavelengths. With simultaneous turbulence monitoring using a MASS-DIMM instrument, we have characterized the performance of Robo-AO as a function of local seeing, turbulence profile, laser return power and the brightness of the tip-tilt star. We shall present the various AO metrics: The full-width at half maxima of the point spread function, the Strehl ratio, the isoplanatic angle and their variations with the atmospheric and operating conditions. Strategies for optimizing robotic AO observations based on varying conditions will be discussed.

  2. 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.

  3. Zeros Reais de Func~oes Reais Introduc~ao

    E-print Network

    Gomes Ruggiero, Márcia A.

    : Dada a fun¸c~ao f : D obter D tal que f() = 0. Dizemos que: ´e um zero de f ou uma raiz da equa 2 #12;Como obter as ra´izes reais de uma equa¸c~ao? Atrav´es de m´etodos iterativos: · a partir de parada seja atingido. O processo de obten¸c~ao das ra´izes ´e realizado em duas fases: FASE I: Localiza

  4. SCExAO: First Results and On-Sky Performance

    NASA Technical Reports Server (NTRS)

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

    2013-01-01

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

  5. O CONSELHO AO SOBERANO E A TEORIA POLÍTICA

    Microsoft Academic Search

    Geraldo Alves; Teixeira Júnior

    Resumo: O pensamento político sistematizado em teoria freqüentemente pretendeu servir de conselho ao soberano. O tipo de conselho que se ofe- rece, no entanto, deveria em todos os casos adaptar-se à \\

  6. Anomalous Eurasian snow extent and the wintertime AO

    E-print Network

    Lundgren, Elizabeth Whitin

    2009-01-01

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

  7. Instituto de Fisica Universidade de S~ao Paulo

    E-print Network

    Nussenzveig, Alberto

    Transpar^encia Induzida Eletromagneticamente: Experimentos e Teorias Jos´e Gabriel Aguirre G´omez Tese de Abril de 2004 #12;P´agina: 2 #12;Conte´udo 1 Introdu¸c~ao 17 2 Descri¸c~oes do campo eletromagn´etico 21 2.1 Introdu¸c~ao . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 2.2 Campo

  8. From AO Methodologies to MAS Infrastructures: The SODA Case Study

    Microsoft Academic Search

    Ambra Molesini; Enrico Denti; Andrea Omicini

    In the last years, research on agent-oriented (AO) methodologies and multi-agent system (MAS) infrastructures has developed\\u000a along two opposite paths: while AO methodologies have essentially undergone a top-down evolution pushed by contributions from\\u000a heterogeneous fields like human sciences, MAS infrastructures have mostly followed a bottom-up path growing from existing\\u000a and widespread (typically object-oriented) technologies. This dichotomy has produced a conceptual

  9. Adelailson Peixoto da Silva Extrac~ao de Malhas

    E-print Network

    ´os­gradua¸c~ao em Inform´atica Rio de Janeiro Outubro de 2002 #12;Adelailson Peixoto da Silva Extra¸c~ao de Malhas: Prof. Marcelo Gattass Co­Orientador: Prof. Luiz Carlos Pacheco R. Velho Rio de Janeiro Outubro de 2002´ifico -- PUC­Rio Rio de Janeiro, 04 de Outubro de 2002 #12;Todos os direitos reservados. ´E proibida a reprodu

  10. Linguagens para Programac~ao Paralela October 26, 2010

    E-print Network

    Rodriguez, Noemi

    estruturas de dados Linguagens para Programa¸c~ao Paralela #12;flat data-parallelism: HPF/Fortran90 opera 1.0 to each element of A A = SQRT(A) ! Computes square root of each element of A L = A .EQ. B ! Sets¸c~ao Paralela #12;Exemplo F77 C diferen¸cas finitas program f77_finite_diff real X(100,100), New(100,100) do i

  11. Linguagens para Programac~ao Paralela November 26, 2009

    E-print Network

    Rodriguez, Noemi

    estruturas de dados Linguagens para Programa¸c~ao Paralela #12;flat data-parallelism: HPF/Fortran90 opera 1.0 to each element of A A = SQRT(A) ! Computes square root of each element of A L = A .EQ. B ! Sets¸c~ao Paralela #12;Exemplo F77 C diferen¸cas finitas program f77_finite_diff real X(100,100), New(100,100) do i

  12. LGS AO Science Impact: Present and Future Perspectives

    E-print Network

    Michael C. Liu

    2008-07-10

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

  13. Computac~ao evolucionaria para otimizac~ao din^amica de par^ametros de EFuNNs

    E-print Network

    Yao, Xin

    ¸~ao evolucion´aria. Uma das abordagens faz uso de um algoritmo gen´etico e a outra faz uso de uma estrat algoritmo de aprendizado. A pri- meira variac¸~ao utiliza um algoritmo gen´etico (AG), conforme o and Miikkulainen, 2002]. Exemplos de tarefas que podem ser realizadas atrav´es de algoritmos evolucion´arios s

  14. Desenvolvimento de Serviços Tolerantes a Intrusões Usando Máquinas Virtuais 1

    Microsoft Academic Search

    Valdir Stumm Júnior; Lau Cheuk Lung; Miguel Correia; Joni da Silva Fraga; Jim Lau

    Much research aiming to design practical algorithm s to support Byzantine Fault-Tolerant distributed applications h as been made in recent years. These solutions are designed to make the app lications resistant to successful attacks against the system, thereby maki ng services tolerant to intrusions. Recently, some of these studies have co nsidered the use of virtual machines for building an

  15. Beyond the Blur: Construction and Characterization of the First Autonomous AO System, and, An AO Survey of Magnetar Proper Motions

    NASA Astrophysics Data System (ADS)

    Tendulkar, Shriharsh Prakash

    Adaptive optics (AO) corrects distortions created by atmospheric turbulence and delivers diffraction-limited images on ground-based telescopes. The vastly improved spatial resolution and sensitivity has been utilized for studying everything from the magnetic fields of sunspots upto the internal dynamics of high-redshift galaxies. This thesis about AO science from small and large telescopes is divided into two parts: Robo-AO and magnetar kinematics. In the first part, I discuss the construction and performance of the world's first fully autonomous visible light AO system, Robo-AO, at the Palomar 60-inch telescope. Robo-AO operates extremely efficiently with an overhead < 50s, typically observing about 22 targets every hour. We have performed large AO programs observing a total of over 7,500 targets since May 2012. In the visible band, the images have a Strehl ratio of about 10% and achieve a contrast of upto 6 magnitudes at a separation of 1??. The full-width at half maximum achieved is 110-130 milli-arcsecond. I describe how Robo-AO is used to constrain the evolutionary models of low-mass pre-main-sequence stars by measuring resolved spectral energy distributions of stellar multiples in the visible band, more than doubling the current sample. I conclude this part with a discussion of possible future improvements to the Robo-AO system. In the second part, I describe a study of magnetar kinematics using high-resolution near-infrared (NIR) AO imaging from the 10-meter Keck II telescope. Measuring the proper motions of five magnetars with a precision of upto 0.7 milli-arcsecond/yr -1, we have more than tripled the previously known sample of magnetar proper motions and proved that magnetar kinematics are equivalent to those of radio pulsars. We conclusively showed that SGR 1900+14 and SGR 1806-20 were ejected from the stellar clusters with which they were traditionally associated. The inferred kinematic ages of these two magnetars are 6 +/- 1.8 kyr and 650 +/-3 00 yr respectively. These ages are a factor of three to four times greater than their respective characteristic ages. The calculated braking index is close to unity as compared to three for the vacuum dipole model and 2.5--2.8 as measured for young pulsars. I conclude this section by describing a search for NIR counterparts of new magnetars and a future promise of polarimetric investigation of a magnetars' NIR emission mechanism.

  16. 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.

  17. High-Performance CCSDS AOS Protocol Implementation in FPGA

    NASA Technical Reports Server (NTRS)

    Clare, Loren P.; Torgerson, Jordan L.; Pang, Jackson

    2010-01-01

    The Consultative Committee for Space Data Systems (CCSDS) Advanced Orbiting Systems (AOS) space data link protocol provides a framing layer between channel coding such as LDPC (low-density parity-check) and higher-layer link multiplexing protocols such as CCSDS Encapsulation Service, which is described in the following article. Recent advancement in RF modem technology has allowed multi-megabit transmission over space links. With this increase in data rate, the CCSDS AOS protocol implementation needs to be optimized to both reduce energy consumption and operate at a high rate.

  18. Comprehensive thermoelectric properties of n- and p-type 78a/o Si - 22a/o Ge alloy

    NASA Technical Reports Server (NTRS)

    Raag, V.

    1978-01-01

    The time and temperature dependence of the thermoelectric properties on n- and p-type 78 a/o Si - 22 a/o Ge alloy are presented in detail for the range of temperatures of zero to 1000 C and operating times up to twelve years. The mechanisms responsible for the time dependence of the properties are discussed and mathematical models used in the derivation of the property values from experimental data are presented. The thermoelectric properties for each polarity type of the alloy are presented as a function of temperature for various operating times.

  19. Early Visible Adaptive Optics Science Results from MagAO's VisAO Camera in Simultaneous Differential Imaging (SDI) Mode: Disks and Point Sources

    NASA Astrophysics Data System (ADS)

    Follette, Kate; Close, Laird; Wu, Ya-Lin; Males, Jared; Morzinski, Katie; Kopon, Derek

    2013-07-01

    We report on early science results from the newly-commissioned Magellan AO (MagAO) system's VisAO camera in Simultaneous Differential Imaging (SDI) mode. The MagAO Adaptive Secondary Mirror's high actuator pitch allow us to achieve AO correction into the visible wavelength regime, and VisAO is the first visible light science camera behind a large (d>6m) telescope AO system. This opens up an interesting new region of parameter space to high contrast, high spatial resolution science. As a natural guide star system, MagAO is optimized for circumstellar science, including both point source detection and high resolution imaging of circumstellar disks. Early SDI science results include the first circumstellar disk imaged in silhouette from the ground, high-resolution images of a binary propylid in Orion and high contrast images of an accreting point source at small separation.

  20. FSE IPSE (2015 AO Admission) Faculty of Science and Engineering

    E-print Network

    Kaji, Hajime

    , "enterprising spirit" which is the philosophy of the university, and a high motivation to learn. SchoolFSE IPSE (2015 AO Admission) Faculty of Science and Engineering School of Fundamental Science and Engineering School of Creative Science and Engineering School of Advanced Science and Engineering WASEDA

  1. FSE IPSE (2014 AO Admission) Faculty of Science and Engineering

    E-print Network

    Kaji, Hajime

    is the philosophy of the university, and a high motivation to learn. School of Fundamental Science and Engineering a new world of this age. School of Fundamental Science and Engineering seeks for students of highFSE IPSE (2014 AO Admission) Faculty of Science and Engineering School of Fundamental Science

  2. Introduction The accessory olfactory system (AOS) has been well

    E-print Network

    Ronquist, Fredrik

    -studied peripheral sensory organ for the AOS is the vomeronasal organ (VNO). Sexual dimorphism in the reptilian) in the vomeronasal organ (VNO) has been richly explored, while that of reptiles, and in particular, the stinkpot detector for odor information concerning social organization and reproductive status (Halpern and Martínez

  3. PEDIDOS DE ADMISSO AOS PROGRAMAS DE PS-GRADUAO

    E-print Network

    ____________________________________________________ Seção de Pós-Graduação Pontifícia Universidade Católica do Rio de Janeiro Rua Marquês de São Vicente, 225 CEP ­ 22453-900 ­ Rio de Janeiro - RJ #12;PEDIDOS DE ADMISSÃO AOS PROGRAMAS DE PÓS-GRADUAÇÃO FOLHA DE REFERÊNCIA OBSERVAÇÃO Preencha o item

  4. Segmentac~ao e Classificac~ao de Padr~oes Visuais Baseadas em Campos Receptivos e Inibitorios

    E-print Network

    Lewiner, Thomas (Thomas Lewiner)

    ´elite. Enquanto a I-PyraNet foi aplicada sobre um problema de detecc¸~ao de faces. Ambos alcanc¸aram bons--The human visual system is one of the most fascinating mechanisms from nature. It is through the visual system that humans are able to accomplish their most basic tasks, like watching TV, until the most

  5. Departamento de Ci^encia da Computac~ao IME-USP MAC 110 --Introduc~ao `a Computac~ao

    E-print Network

    Reverbel, Francisco

    -- Primeiro Semestre de 2007 Segundo Exerc´icio-Programa Prazo de entrega: at´e 15 de maio de 2007. Ra´izes de Equa¸c~oes Quadr´aticas Escreva um programa em C que calcula as ra´izes de equa¸c~oes quadr´aticas. Seu programa deve ler um real > 0 que define a precis~ao para c´alculo de ra´izes quadradas, um inteiro n 1 e

  6. Departamento de Ci^encia da Computac~ao IME-USP MAC0115 Introduc~ao `a Computac~ao para Ci^encias Exatas e Tecnologia

    E-print Network

    Reverbel, Francisco

    ´icio-Programa Prazo de entrega: at´e 16 de outubro de 2011. Ra´izes de Equa¸c~oes Quadr´aticas Escreva um programa em C que calcula as ra´izes de equa¸c~oes quadr´aticas. Seu programa deve ler um real > 0 que define a precis~ao para c´alculo de ra´izes quadradas, um inteiro n 1 e os coeficientes reais a, b e c de n equa

  7. modelado y analisis del transporte del herbicida glifosato

    E-print Network

    2001-03-12

    (2) Departamento de Ingeniería del Terreno, Universidad Politécnica de Cataluña (España). (3) Department of ... tools for the study of water and contaminant transport in the unsaturated zone. ..... Dynamics of Fluids in Porous Media. Esevier ...

  8. Intelligent vibration control of ELTs and large AO hardware

    NASA Astrophysics Data System (ADS)

    Pott, J.-U.; Kürster, M.; Trowitzsch, J.; Borelli, J.; Rohloff, R.-R.; Herbst, T.; Böhm, M.; Keck, A.; Ruppel, T.; Sawodny, O.

    2012-07-01

    MPIA leads the construction of the LINC-NIRVANA instrument, the MCAO-supported Fizeau imager for the LBT, serves as pathfinder for future ELT-AO imagers in terms of size and technology. In this contribution, we review recent results and significant progress made on the development of key items of our stratgey to achieve a piston stability of up to 100nm during a science exposure. We present an overview of our vibration control strategies for optical path and tip-tilt stabilization, involving accelerometer based real-time vibration measurements, vibration sensitive active control of actuators, and the development of a dynamical model of the LBT. MPIA also co-develops the E-ELT first-light NIR imager MICADO (both SCAO and MCAO assisted). Our experiences, made with LINC-NIRVANA, will be fed into the MICADO structural AO design to reach highest on-sky sensitivity.

  9. Speckle Imaging with VLT/NACO No-AO Mode

    NASA Astrophysics Data System (ADS)

    Rengaswamy, S.; Girard, J.; de Wit, W.-J.; Boffin, H.

    2014-03-01

    Long-exposure stellar images recorded with large ground-based telescopes are blurred due to the turbulent nature of the atmosphere. The VLT employs active and adaptive optics (AO) systems to compensate for the deleterious effects of the atmosphere in real time. The speckle imaging technique provides an alternative way to achieve diffraction-limited imaging by post-processing a series of short-exposure images. The use of speckle imaging with the no-AO mode of NACO at the VLT is demonstrated. Application of this technique is particularly suited to the J-band and it provides versatile high angular resolution imaging under mediocre conditions and/or in imaging extended objects. The implementation of this mode underlines the continuing attractiveness of NACO at the VLT.

  10. Real-time control system verification for ELT AO systems

    NASA Astrophysics Data System (ADS)

    Basden, Alastair; Myers, Richard; Morris, Tim; Bharmal, Nazim; Bitenc, Urban; Dipper, Nigel; Reeves, Andrew; Gendron, Eric; Rousset, Gérard; Hubert, Zoltan; Vidal, Fabrice; Matin, Olivier; Gratadour, Damien; Chemla, Fanny

    2013-12-01

    ELT AO systems have demanding computational requirements for real-timecontrol. These systems are required to be fully tested and robustbefore commissioning so that valuable on-sky time is not wasted. Inthis talk I will report recent work at Durham on our ELT AO real-timecontrol system, algorithms that we use to improve robustness, anddevelopment of an end-to-end testing environment that will allow fulltesting of real-time control systems, including both Monte-Carlosimulation and hardware approaches. The talk will include experiencegained with CANARY, how the robustness of this system has beenimproved, and our experience operating with four laser guide stars. Workcarried out in this area on the DRAGON test-bench will also bedescribed.

  11. LDEF results for polymer matrix composite experiment AO 180

    NASA Technical Reports Server (NTRS)

    Tennyson, R. C.

    1992-01-01

    This report represents a summary of the results obtained to-date on a polymer matrix composite experiment (AO 180) located at station D-12, about 82 deg off the 'ram' direction. Different material systems comprised of graphite, boron, and aramid (Kevlar) fiber reinforcements were studied. Although previous results were presented on in-situ thermal-vacuum cycling effects, particularly dimensional changes associated with outgassing, additional comparative data will be shown from ground-based tests on control and flight samples. The system employed was fully automated for thermal-vacuum cycling using a laser interferometer for monitoring displacements. Erosion of all three classes of materials due to atomic oxygen (AO) will also be discussed, including angle of incidence effects. Data from this experiment will be compared to published results for similar materials in other LDEF experiments. Composite materials' erosion yields will be presented on an AO design nomogram useful for estimating total material loss for given exposure conditions in low Earth orbit (LEO). Optical properties of these materials will also be compared with control samples. A survey of the damage caused by micrometeoroids/debris impacts will be addressed as they relate to polymer matrix composites. Correlations between hole size and damage pattern will be given. Reference to a new nomogram for estimating the number distribution of micrometeoroid/debris impacts for a given space structure as a function of time in LEO will be addressed based on LDEF data.

  12. Physical characteristics of the Blazar AO 0235+164

    NASA Astrophysics Data System (ADS)

    Vol'vach, A. E.; Larionov, M. G.; Vol'vach, L. N.; Lähteenmäki, A.; Tornikoski, M.; Aller, M. F.; Aller, H. D.; Sasada, M.

    2015-02-01

    Long series of multi-frequency monitoring data of the active galactic nucleus (AGN) AO 0235+164 from the radio to the gamma-ray are analyzed. AO 0235+164 may be a close binary system comprised of two supermassive black holes (SMBHs). A harmonic analysis has established the presence of orbital and precessional periods of two and eight years, respectively. These values are close to the analogous periods found in other AGNs that have been proposed to be close SMBH binary systems in a stage of their evolution close to coalescence. A cross-correlation analysis is used to find the time delay between corresponding flares occurring in different wavebands. The empirical dependence found earlier for a number of other AGNS relating the delay in the flux variations with the frequency is observed for this object, and has the form of an inverse logarithmic dependence, providing evidence that the flux variability of AGNs at centimeter and shorter wavelengths is intrinsic. The standard picture of jet activity of AGNs supposes plasma formations that move from the central regions along outflows, becoming optically thin at longer and longer wavelengths as they do so. The physical and dynamical characteristics of AO 0235+164 suggest it is a close binary with SMBHs with similar masses of the order of 1010 M ?. This is one of the most massive systems of two SMBHs. The velocities of the companion and central black hole about their common center of mass are estimated to be 104 and 5×103 km/s. The results obtained suggest that observed bright AGNs form a relatiavely rare population among massive elliptical galaxies, due to their narrowly directed emission and their short lifetimes.

  13. LDEF (Postflight), AO201 : Interplanetary Dust Experiment, Tray C03

    NASA Technical Reports Server (NTRS)

    1990-01-01

    LDEF (Postflight), AO201 : Interplanetary Dust Experiment, Tray C03 The IDE mounting plate and the detector frames are coated with a brown stain similiar to that seen on the other experiments in this and other trays located nearby. The stain seems to be slightly darker along the lower edge of the solar sensor mounting plate. The colors and designs seen on the detectors are reflections of the surrounding area. The thin brown film on the detectors metallic surface has resulted in a duller reflection of a technician, in the upper left, and other items.

  14. Bolsas das embaixadas permitem estudar, da Colmbia ao Japo

    E-print Network

    Instituto de Sistemas e Robotica

    decorrem até dia2s de junho. Ao DN, Natsuki Konagaya, segunda secretário para a Informação e Assuntos Culturais da embaixada deste país em Lisboa, explicou que o número de lugares por país varia de ano para ano, não definindo para já um limite. "Ainda não sabemos quantas pessoas serão da parte de Portugal. O ano

  15. Maratona de Programac~ao ACM ICPC 2005 1 Brincadeira

    E-print Network

    anos. Entrada A entrada cont´em v´arios casos de teste. A primeira linha de um caso de teste cont´em um ´unico inteiro 1 N 10000 que indica o n´umero de vezes que os amigos tiraram par-ou-´impar. A segunda `Alice ganhou X e Beto ganhou Y', onde X 0 e Y 0. A sa´ida deve ser escrita na sa´ida padr~ao. Exemplo

  16. Intramedullary locking femoral nails. Experience with the AO nail.

    PubMed Central

    Fogarty, A. B.; Yeates, H. A.

    1991-01-01

    The AO interlocking nail was introduced to the Ulster Hospital, Dundonald in 1988 and since then has been used in over 50 patients with femoral shaft fractures. We have reviewed 45 patients with 46 femoral shaft fractures treated between June 1988 and April 1990. These included four compound fractures and 13 comminuted fractures. The results compare favourably with other series. The union rate was 98% and there were no instances of deep infection. The alternative treatment methods available are discussed along with a review of the relevant literature. Images Fig 3 Fig 5 PMID:1785145

  17. 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 postflight photograph was taken in the KSC SAEF II facility after the experiment was removed from the LDEF. The brown stains are still very prominent and appear to be the same as in the flight photograph. The openings in the base plate for the grid voltage cable connector mounts are thought to be the source of the darker brown stains around the connectors. The covers have been installed on the canister housings to protect the space exposed hardware. The contamination stain provides an out- line of tray clamp block locations on the experiment tray flanges.

  18. 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 postflight photograph was taken in the KSC SAEF II facility after the experiment was removed from the LDEF. The brown stains are still very prominent and appear to be the same as in the flight photograph. The openings in the base plate for the grid voltage cable connector mounts are thought to be the source of the darker brown stains around the connectors. The covers have been installed on the canister housings to protect the space exposed hardware. The contamination stain provides an out- line of tray clampblock locations on the experiment tray flanges.

  19. CCM0118 --Computac~ao I Curso de Ci^encias Moleculares --Turma 22 --Segundo Semestre de 2012

    E-print Network

    Reverbel, Francisco

    aninhamento de chamadas. #12;Quest~ao 2 (2,0 pontos) Escreva uma fun¸c~ao com prot´otipo float raiz aproxima¸c~ao de raiz c´ubica de x com precis~ao . A aproxima¸c~ao deve ser obtida por meio da sequ^encia r

  20. Titanium alloys (AoN) and their involvement in osseointegration

    PubMed Central

    Danza, Matteo; Zollino, Ilaria; Candotto, Valentina; Cura, Francesca; Carinci, Francesco

    2012-01-01

    Background: Osseointegration is essential for a long-term successful and inflammation-free dental implant. Such a result depends on osteoblastic cells growth and differentiation at the tissue-implant interface. The aim of this study was to compare two different AoN titanium layers (GR4 and GR5) to investigate which one had a greater osteoconductive power using human osteoblasts (HOb) culture at two different time-points. Materials and Methods: The expression levels of some bone-related (ALPL, COL1A1, COL3A1, SPP1, RUNX2, and SPARC) were analyzed using real time reverse transcription-polymerase chain reaction (real time RT-PCR). Results: Real-time RT-PCR data showed that after 3 days of treatment with TiA4GR, the genes up-regulated were COL3A1, ALPL, SPP1, and RUNX2. Moreover, no difference in gene expression was noticed 4 days later. On the other hand, the genes that overexpressed after 3 days of treatment with AoN5GR were ALPL, SPP1, and RUNX2. In both cases, the expression of COL1A1 and SPARC was negatively regulated. Conclusion: Our data showed that both titanium surfaces led to osteoblasts recruitment, maturation, and differentiation, thus promoting osseointegration at the tissue-implant interface. PMID:23814585

  1. New Results from the AO327 Drift Pulsar Survey

    NASA Astrophysics Data System (ADS)

    Deneva, Julia S.; Stovall, K.; McLaughlin, M.; Bates, S.; Freire, P.; Martinez, J.; Jenet, F.; Bagchi, M.

    2014-01-01

    The Arecibo 327 MHz drift pulsar survey (AO327) has operated since 2010 and aims to cover the entire Arecibo sky (declinations of -1 to 38 degrees). We present details on the progress of the survey and a new set of discoveries over the past year. Phase 1 of AO327 targets declinations of -1 to 28 degrees and is 55% complete; Phase 2 will target declinations of 28 to 38 degrees. The survey is expected to be completed in 2017. Out of a total of 28 new pulsars, 12 were found in 2013, including three millisecond pulsars. PSR J2234+06 has a rotation period of 3.58 ms and is in a 32-day orbit in a binary system with a white dwarf companion. This pulsar is bright and a very stable rotator, making it suitable for inclusion in Pulsar Timing Arrays. The orbit of J2234+06 has an eccentricity of 0.13, which cannot be accounted for by stellar evolution but may be explained by an origin in a subsequently disrupted hierarchical triple, or by an exchange interaction. PSR J0509+08 has a period of 4.06 ms and is in a 4.9-day binary system with a white dwarf companion. This pulsar is also a candidate for inclusion in PTAs.

  2. Robo-AO: autonomous and replicable laser-adaptive-optics and science system

    NASA Astrophysics Data System (ADS)

    Baranec, C.; Riddle, R.; Ramaprakash, A. N.; Law, N.; Tendulkar, S.; Kulkarni, S.; Dekany, R.; Bui, K.; Davis, J.; Burse, M.; Das, H.; Hildebrandt, S.; Punnadi, S.; Smith, R.

    2012-07-01

    We have created a new autonomous laser-guide-star adaptive-optics (AO) instrument on the 60-inch (1.5-m) telescope at Palomar Observatory called Robo-AO. The instrument enables diffraction-limited resolution observing in the visible and near-infrared with the ability to observe well over one-hundred targets per night due to its fully robotic operation. Robo-AO is being used for AO surveys of targets numbering in the thousands, rapid AO imaging of transient events and long-term AO monitoring not feasible on large diameter telescope systems. We have taken advantage of cost-effective advances in deformable mirror and laser technology while engineering Robo-AO with the intention of cloning the system for other few-meter class telescopes around the world.

  3. LDEF (Postflight), AO201 : Interplanetary Dust Experiment, Tray H11

    NASA Technical Reports Server (NTRS)

    1990-01-01

    LDEF (Postflight), AO201 : Interplanetary Dust Experiment, Tray H11 The Interplanetary Dust Experiment hardware has a thin brown stain on the exposed surfaces. A deeper brown stain, probably from the material underneath the small electrical cover plate of the detector frame, can be seen in the upper right corner of some of the detectors. Stain that was seen on the solar sensor base plate in the flight photograph cannot be seen because of reflected light. The colors seen in the detector's mirror like surface are reflections of the surrounding area. A dark spot seen on a detector in the third row from the top in the flight photograph, was not found in a postflight inspection. A close inspection of this photograph does reveal several impact damage locations.

  4. LDEF (Postflight), AO201 : Interplanetary Dust Experiment, Tray C09

    NASA Technical Reports Server (NTRS)

    1990-01-01

    LDEF (Postflight), AO201 : Interplanetary Dust Experiment, Tray C09 The postflight photograph was taken prior to the experiment tray being removed from the LDEF. The tray corner clamp blocks are un-anodized aluminum and that alone accounts for the major difference in color between the corner clamp blocks and the center clamp blocks. The IDE mounting plate and the detector frames and detectors seem to be in excellent condition. Close inspection of the photograph reveals several locations where impacts on detector surfaces are visible. A faint gold or tan stain can be seen around several of the fasteners and in a rectangular configuration, near the center, along the bottom edge of the detector mounting plate. Stains can also be seen near the top right edge of the solar sensor, on the mounting plate, and around the extreme edges of the solar sensor baseplate. The colors and designs seen on the detectors are reflections of the surrounding area.

  5. 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.

  6. Marco ao ra aoor Dii i ii Dii i i

    E-print Network

    Baioletti, Marco

    A Marco ao ra aoor Dii i ii Dii i i i i i i i i i i i ii i i ii A E E E 1 1 n n i i i i i i i i i i ii i i i i i ii i i i i i i i i i i i i i i ii i i i i i ii i i i i i i ii i ii i i ii i i E i i i i i E i i i i i i ii ii E i i i ii i i i i i ii i ii i i ii ii ii i i ii i i ii ii ii i i A A i i i ii

  7. IDENTIFICAC ~AO E RASTREAMENTO EM TEMPO REAL DE M ULTIPLOS AGENTES AUT ^ONOMOS

    E-print Network

    Zhang, Richard "Hao"

    - treamento em tempo real de objetos durante o jogo. Diversos experimentos reais s~ao realizados para~ao, v´arios experimentos t^em sido realizados visando `a construc¸~ao de um time completo de rob^os com^o deve carregar uma bola de ping-pong colorida que ´e usada como o uniforme ou camiseta do time. O campo

  8. Encapsulamento e libera»c~ao de nanopart¶‡culas em magnetolipossomas recobertos com colesterol

    Microsoft Academic Search

    E. R. Cintra; A. F. Bakuzis; F. S. Ferreira; E. M. Lima; Faculdade de Farmacia

    2007-01-01

    A utiliza»c~ao de nanoestruturas magneticas no carreamento de drogase certamente uma das aplica»c~oes mais interessantes da Nanotecnologia. Neste caso temos uma aplica»c~ao de medicamentos local utilizando vetores espec¶‡flcos, como por exemplo, acoplando anticorpos a moleculas adsorvidas na superf¶‡cie de nanopart¶‡culas, ou ainda, utilizando gradiente de campo magnetico numa posi»c~ao espec¶‡flca do corpo do paciente. Esse tipo de estrategia conta com

  9. LDEF (Postflight), AO201 : Interplanetary Dust Experiment, Tray G10

    NASA Technical Reports Server (NTRS)

    1990-01-01

    LDEF (Postflight), AO201 : Interplanetary Dust Experiment, Tray G10 The IDE experiment appears to be in excellent condition in the postflight photograph. All bond joints seem to have survived the space environment and the experiment hardware seems to be intact. The direction and intensity of the artificial light source has caused hot spots and reflections that tend to wash out the brown stain on the exposed surfaces. A close inspection of individual detectors reveal locations where impacts have occurred and damage is present. In the detector layout in the lower left corner of the tray, two detectors continue to show the discolorations observed in the flight photograph. A triangular shape can be seen in the detector located in the second horizontal row from the bottom and the second vertical row from the left. The other detector, located in the third horizontal row from the bottom and the fourth vertical row from the left has an irregular shaped, very faint, discolora tion. The blue color in the detectors metallic surface is caused by reflections of the surrounding area.

  10. 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.

  11. LDEF (Postflight), AO201 : Interplanetary Dust Experiment, Tray B12

    NASA Technical Reports Server (NTRS)

    1990-01-01

    LDEF (Postflight), AO201 : Interplanetary Dust Experiment, Tray B12 The postflight photograph shows little change of the exposed surfaces when compared with the prelaunch photograph. Although not noticable in the photograph, a light coating of contamination was seen on all experiment surfaces in this location. The difference in colors of the IDE detectors, located on the right hand mounting plate, is a result of the reflected surroundings and not related to space exposure. A close observation of the detector surfaces reveal that some damage has occured from meteroid and/or debris impacts. One impact crater can be seen, upper right quadrant, on the detector located in the sixth (6th) row down from the top and the fifth (5th) row from the right. Other impacts, smaller in size, show as small white dots on the detector surface. The solar sensor seems to have changed little, if any. However, the color of the solar array baseplate, showing indications of contamination, appears to be darker than the detector mounting plate. The center section cover plate shows little change when compared with the pre-launch photograph. However, during inspection, a light coat of the brown contamination has been observed on all surfaces. The color of the bonding material (RTV) used to secure several thin specimen, sapphire, to individual mounting plates has changed from pink to gold. At one location, that of a single specimen, the bonding material is more gray than gold in color. This has been attributed to the specimen being considerably thicker. The EPDS thermal cover in the right hand side of the tray shows a light coating of brown contamination on the Chemglaze II A-276 white paint.

  12. Multiconjugate AO system for 8-m class telescopes

    NASA Astrophysics Data System (ADS)

    Brusa, Guido; Riccardi, Armando; Esposito, Simone; Femenia, Bruno; Carbillet, Marcel

    2000-07-01

    Adaptive optics systems for the current generation of astronomical telescopes are being designed and developed at the present time with different goals and related complexities. In order to make the best use of such systems more and more projects are considering introducing at least one artificial reference star. It is a fact that for 8 m class telescopes a single artificial star will only give benefit in the last part of the NIR region of the spectrum (essentially H and K bands). To push the performances of such systems to shorter wavelengths and/or worse seeing it is required to have more than one reference star. It is known that the multi-reference, multi-conjugate adaptive optics systems (MCAO) could provide great advantages in mitigating the effect of the limited range of the artificial reference stars (the so-called cone effect) while in the mean time enlarging the corrected field of view of an AO system. We are currently approaching the problem of designing such a system from both practical and theoretical point of view and carefully comparing several possible solutions: multiple sodium laser guide stars, multiple Rayleigh back-scattering laser guide stars, hybrid system using both types of stars. The first type of stars has the advantage of having the highest range achievable today but currently the lasers required to produce this type of stars have a limited available power, high costs and low reliability. On the other hand the lasers required for Rayleigh guide stars do not suffer from these limitations but the ranges achieved are lower. Given these limitations we think that a system that would use either a constellation of Rayleigh stars or a hybrid with a single sodium star could be a good compromise between the various choices. In this paper we present some preliminary evaluation results of an MCAO system that would use a constellation of off-axis Rayleigh stars plus an on-axis Rayleigh or sodium star.

  13. 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.

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

    PubMed Central

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

    2015-01-01

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

  15. 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…

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

    E-print Network

    Torres, Fernando

    empenhava nesses estudos, Arthur Cayley publicou um trabalho que consagrou os oct^onions, a partir de entO Algoritmo de Cayley-Dickson e Alguns Teoremas de Classifica¸c~ao MM445 Vladmir Sicca Gon~ao conhecidos como n´umeros de Cayley. Posteriormente, Dickson publica um trabalho em que apresenta um algoritmo

  17. 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.

  18. The impacts of AO and ENSO on the Great Lakes ice cover

    Microsoft Academic Search

    X. Bai; J. Wang

    2008-01-01

    The impacts of ENSO (El Nino and South Oscillation) and Arctic Oscillation (AO) on the Great Lakes ice cover were investigated using ice observations for winters 1963-2008, and NCEP reanalysis data. Signatures of ENSO and AO were found in the Great Lakes ice cover. However, the impacts are nonlinear and asymmetric. Strong El Nino events are often associated with least

  19. AO-308: the high-order adaptive optics system at Big Bear Solar Observatory

    NASA Astrophysics Data System (ADS)

    Shumko, Sergey; Gorceix, Nicolas; Choi, Seonghwan; Kellerer, Aglaé; Cao, Wenda; Goode, Philip R.; Abramenko, Volodymyr; Richards, Kit; Rimmele, Thomas R.; Marino, Jose

    2014-08-01

    In this paper we present Big Bear Solar Observatory's (BBSO) newest adaptive optics system - AO-308. AO-308 is a result of collaboration between BBSO and National Solar Observatory (NSO). AO-308 uses a 357 actuators deformable mirror (DM) from Xinetics and its wave front sensor (WFS) has 308 sub-apertures. The WFS uses a Phantom V7.3 camera which runs at 2000 Hz with the region of interest of 416×400 pixels. AO-308 utilizes digital signal processors (DSPs) for image processing. AO-308 has been successfully used during the 2013 observing season. The system can correct up to 310 modes providing diffraction limited images at all wavelengths of interest.

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

    NASA Astrophysics Data System (ADS)

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

    2014-12-01

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

  1. 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.

  2. 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.

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

    PubMed

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

    2013-01-01

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

  4. 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

  5. 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).

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

    E-print Network

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

    2007-01-01

    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).

  7. The comparison of photometric data from CrAO and VizieR catalogues

    NASA Astrophysics Data System (ADS)

    Shlyapnikov, A. A.

    2007-04-01

    The results of photographic, photoelectric, television and CCD observations in CrAO in comparison with other data are reported. The estimate of accuracy for different methods of photometry of 1677 objects is presented.

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

    E-print Network

    Cruz, Frederico

    Redes de Filas Finitas Dependentes do Estado Guilherme D. Carvalho, Renato A. Nascimento & Frederico R´iculos, baseado em filas finitas configuradas em redes, acoplado ao modelo do ´otimo do sistema, que ´e um dos tr´afego faz sentido e ´e robusta. Palavras-chave: Redes de filas, filas finitas, sistemas estoc

  9. Programac~ao concorrente e paralela 2010.2 Exercicio MPI

    E-print Network

    Rodriguez, Noemi

    raiz ´e r ´e a probabilidade de r somado ao custo das sub-´arvores esquerda e direita. O mesmo se, precisamos selecionar um dos n´os como raiz de forma que a soma da sua probabilidade com a soma das sub¸c~ao tendo um n´o r como raiz, e aplic´a-la em todos os n´os para encontrar o menor custo. Esse algoritmo

  10. ADAPTAO DO FORETHOUGHT AO FREEBSD Antnio Alves, Gonalo Quadros e Edmundo Monteiro

    E-print Network

    Monteiro, Edmundo

    1 ADAPTA��O DO FORETHOUGHT AO FREEBSD António Alves, Gonçalo Quadros e Edmundo Monteiro. Este trabalho descreve a adaptação para o sistema operativo FreeBSD ao abrigo de um acordo entre o protocolares tendo sido construídos e testados novos mecanismos (em ambiente FreeBSD) para esse efeito. 1

  11. Von Neumann e a previs~ao num'erica de tempo e clima

    E-print Network

    Kohayakawa, Yoshiharu

    ~oes de tempo acuradas para 24, 48, at'e cerca de 120 horas, em n'ivel mundial. Tal fato pode ser contrastado com as previs~oes prec'arias de 40 anos atr'as, quando teve in'icio a moderna era de previs~ao num com um modelo de 'area limitada de 70 km de resolu¸c~ao, 50 n'iveis na vertical e passos de integra

  12. Paula Salgado Lucena Rodrigues Um Sistema de Gerac~ao de Express~oes Faciais

    E-print Network

    Rio de Janeiro Dezembro de 2007 #12;Paula Salgado Lucena Rodrigues Um Sistema de Gera¸c~ao de Express Centro T´ecnico Cient´ifico -- PUC­Rio Rio de Janeiro, 20 de Dezembro de 2007 #12;Todos os direitos´atica pela PUC-Rio (Pon- tif´icia Universidade Cat´olica do Rio de Janeiro). Ao longo do Doutorado atuou como

  13. UM METODO DE OCULTAMENTO DE ERROS EM TRANSMISS~AO DE Ana Luisa de Araujo Santos

    E-print Network

    de Queiroz, Ricardo L.

    UNIVERSIDADE FEDERAL DO RIO DE JANEIRO COMO PARTE DOS REQUISITOS NECESS´ARIOS PARA A OBTENC¸ ~AO DO GRAU DE Mattoso Maia, Ph.D. RIO DE JANEIRO, RJ - BRASIL MARC¸O DE 2006 #12;SANTOS, ANA LU´ISA DE ARAUJO Um M´etodo de Ocultamento de Erros em Transmiss~ao de V´ideo [Rio de Janeiro] 2006 X, 91 p. 29,7 cm (COPPE

  14. On the relationship between age-of-air (AoA) changes and changes in residual circulation and eddy mixing

    NASA Astrophysics Data System (ADS)

    Riese, Martin; Mueller, Rolf; Stiller, Gabriele; Konopka, Paul; Ploeger, Felix

    We analyze the effects of the stratospheric residual circulation and eddy mixing on the variability of mean age of air (AoA) within the framework of the isentropic zonal mean continuity equation, based on AoA simulations with the Lagrangian chemistry transport model CLaMS. We find that throughout the stratosphere the effects of residual circulation and eddy mixing on AoA are opposite and cancel to a large degree, with the net AoA changes resulting from this delicate balance. Mixing increases AoA equatorwards of about 40 deg N, by mixing in aged mid-latitude air, and decreases AoA at higher latitudes. In the tropical and polar upper stratosphere AoA variability is dominated by the residual circulation. In the subtropics and midlatitudes AoA variability is dominated by eddy mixing and AoA is not a unique proxy for varibility in the residual circulation. The simulated AoA change during the last decade (2002-2012) shows a nonuniform pattern, with a significant AoA increase in the NH consistent with recent satellite observations obtained by MIPAS-Envisat, and decreasing AoA in the lowest stratosphere.

  15. Parameterising E-ELT AO PSFs for detailed science simulations for HARMONI

    NASA Astrophysics Data System (ADS)

    Zieleniewski, Simon; Thatte, Niranjan

    2013-12-01

    With the first ELTs around the corner it is becoming ever more important to determine observational strategies and assess the prospective success of observing programs prior to making the observations. To this end, scientific simulations need to become more refined to understand the criteria required for a specific science case. We address the science simulations for HARMONI, an AO assisted first light integral field spectrograph (IFS) for the E-ELT. AO PSFs vary markedly as a function of wavelength and type of AO system used, so there is need to create detailed PSFs across all IFS wavelength channels for accurate simulations. Detailed AO simulations have shown that for LTAO on the E-ELT, Strehl ratios can vary from 0.5E-3 in V-band up to 0.5 in K-band. Using a single PSF for an entire datacube (especially with large instantaneous wavelength coverage) could introduce misleading features into simulated observations using HARMONI. We have developed a method to parameterize detailed PSFs using analytical models, which can then be interpolated as a function of wavelength. This allows us to create accurate, but computationally inexpensive, AO PSF datacubes for HARMONI simulations. This shall be developed to cover LTAO, SCAO and GLAO/no-AO PSFs for a range of observing parameters.

  16. Progress towards wind predictive control on ShaneAO: test bench results

    NASA Astrophysics Data System (ADS)

    Rudy, Alexander R.; Srinath, Srikar; Poyneer, Lisa; Ammons, S. M.; Gavel, Don; Kupke, Renate; Dillon, Darren; Rockosi, Constance

    2014-07-01

    The identification and prediction of time-varying wavefront errors in adaptive optics (AO) systems promises fainter limiting guide star magnitudes and improved temporal bandwidth errors. In a new UCSC-LLNL collaboration, we aim to demonstrate the power of predictive Fourier controllers for AO in the laboratory and on-sky. We have used the Fourier Wind Identification technique to measure wind velocities at several telescopes, and now have demonstrated the identification of frozen flow turbulence with a translating phase screen on a laboratory test bench. Here, we present identification of the wind direction and velocity using telemetry data from a laboratory testbed simulating the ShaneAO system geometry. Our wind identification system uses a Fourier decomposition technique to identify the correlated movement of the atmosphere from WFS telemetry data, which are then used to construct a Kalman filter for real-time operation. We demonstrate the use of an LQG controller with the ShaneAO system architecture, and show that the effects of frozen flow turbulence can be easily identified in laboratory telemetry. We describe the adaptations made to the LQG controller to integrate it into the dual-DM architecture of the ShaneAO system, and demonstrate that these modifications produce stable and well-understood AO correction in the laboratory.

  17. Building a reliable, scalable and affordable RTC for AO instruments on ELTs

    NASA Astrophysics Data System (ADS)

    Gratadour, Damien; Sevin, Arnaud; Perret, Denis; Brule, Julien

    2013-12-01

    Addressing the unprecedented amount of computing power needed by the ELTs AO instruments real-time controllers (RTC) is one of the key technological developments required for the design of the next generation AO systems. Throughput oriented architectures such as GPUs, providing orders of magnitude greater computational performance than high-end CPUs, have recently appeared as attractive and economically viable candidates since the fast emergence of devices capable of general purpose computing. However, using for real-time applications a I/0 device which cannot be scheduled nor controlled internally by the operating system but is sent commands through a closed source driver comes with a number of challenges. Building on the experience of almost real-time end-to-end simulations using GPUs, and relying on the development of the COMPASS platform, a unified and optimized framework for AO simulations and real-time control, our team has engaged into the development of a scalable, heterogeneous GPU-based prototype for an AO RTC. In this paper, we review the main challenges arising when utilizing GPUs in real-time systems for AO and rank them in terms of impact significance and available solutions. We present our strategy, to mitigate these issues including the general architecture of our prototype, the real-time core and additional dedicated components for data acquisition and distribution. Finally, we discuss the expected performance in terms of latency and jitter on the basis of realistic benchmarks and focusing on the dimensioning of the MICADO AO module RTC.

  18. Sequence of the 165Kilobase Catabolic Plasmid pAO1 from Arthrobacter nicotinovorans and Identification of a pAO1Dependent Nicotine Uptake System

    Microsoft Academic Search

    Gabor L. Igloi; Roderich Brandsch

    2003-01-01

    The 165-kb catabolic plasmid pAO1 enables the gram-positive soil bacterium Arthrobacter nicotinovorans to grow on the tobacco alkaloid L-nicotine. The 165,137-nucleotide sequence, with an overall GC content of 59.7%, revealed, besides genes and open reading frames (ORFs) for nicotine degradation, a complete set of ORFs for enzymes essential for the biosynthesis of the molybdenum dinucleotide cofactor, as well as ORFs

  19. Toward an experimental validation of new AO concepts for future E-ELT instrumentation

    NASA Astrophysics Data System (ADS)

    El Hadi, K.; Fusco, T.; Le Roux, B.

    2012-07-01

    For the last few years, LAM has been carrying out several R&D activities in Adaptive Optics (AO) instrumentation for Extremely Large Telescopes (ELTs). In the European ELT framework, a multi-purpose AO bench is developed to allow the experimental validation of new instrumental concepts dedicated to the next generation of ELTs. It is based on the use of a Shack-Hartmann wave-front sensor in front of a 140 actuators micro-deformable mirror (Boston Micromachines), dedicated to “low orders” modes, while a Pyramid wave-front sensor (PWFS) will be combined to a Liquid Crystal Spatial Light Modulator for “high orders” correction. Both systems could be merged in a two stages AO concept allowing to study the coupling of a telescope pre-correction using a dedicated large M4 deformable mirror and a post focal high order AO system. Analysis and optimisation of the spatial and temporal splits of the AO correction between the two systems is therefore essential. Finally, we will use the world’s fastest and most sensitive camera system OCAM (developed at LAM) coupled with the pyramid , to demonstrate the concept of a fast and hyper-sensitive PWFS (up to 100x100 sub-pupils) dedicated to the first generation instruments for ELTs.

  20. Requirements Modeling with the Aspect-oriented User Requirements Notation (AoURN): A Case Study

    NASA Astrophysics Data System (ADS)

    Mussbacher, Gunter; Amyot, Daniel; Araújo, João; Moreira, Ana

    The User Requirements Notation (URN) is a recent ITU-T standard that supports requirements engineering activities. The Aspect-oriented URN (AoURN) adds aspect-oriented concepts to URN, creating a unified framework that allows for scenario-based, goal-oriented, and aspect-oriented modeling. AoURN is applied to the car crash crisis management system (CCCMS), modeling its functional and non-functional requirements (NFRs). AoURN generally models all use cases, NFRs, and stakeholders as individual concerns and provides general guidelines for concern identification. AoURN handles interactions between concerns, capturing their dependencies and conflicts as well as the resolutions. We present a qualitative comparison of aspect-oriented techniques for scenario-based and goal-oriented requirements engineering. An evaluation carried out based on the metrics adapted from literature and a task-based evaluation suggest that AoURN models are more scalable than URN models and exhibit better modularity, reusability, and maintainability.

  1. Up-regulated expression of AOS-LOXa and increased eicosanoid synthesis in response to coral wounding.

    PubMed

    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

  2. The Algorithmics of Solitaire-Like Games Roland Backhouse, Wei Chen, Jo~ao F. Ferreira1

    E-print Network

    Backhouse, Roland

    The Algorithmics of Solitaire-Like Games Roland Backhouse, Wei Chen, Jo~ao F. Ferreira1 School@cs.nott.ac.uk (Wei Chen), joao@joaoff.com (Jo~ao F. Ferreira) 1Funded by Funda¸c~ao para a Ci^encia e a Tecnologia-person games, which we call "replacement-set games", inspired by earlier work by Chen and Backhouse

  3. Repruducibility of tronzo and ao/asif classifications for transtrochanteric fractures

    PubMed Central

    Behrendt, Christian; Faleiro, Thiago Batista; Schulz, Renata Da Silva; Silva, Bianca Ortiz Da; Paula, Erivaldo Queiróz De

    2014-01-01

    Objective: To assess the reproducibility of Tronzo and AO/ASIF classifications for transtrochanteric fractures, in order to determine the most appropriate classification for clinical application, and to evaluate the influence of the level of experience of the observers in the agreement between evaluations. Methods: We selected 30 radiographic images of transtrochanteric fractures of the femur, which were presented to two groups of observers, one formed by expert physicians and the other by resident physicians. Results: When evaluated together, Tronzo classification obtained a Kappa value of 0.44. The same classification assessed by the expert group obtained a value of 0.46, while the group of residents' value was 0.44. Evaluating the AO/ASIF classification of the complete pool analysis the value found was 0.42. For the same classification, analyzed by the expert group, obtained a value of 0.41, and by the group of residents, the Kappa value achieved was 0.42. However, when analyzed in its simplified form, the AO/ASIF classification obtained Kappa values of 0.70 (pooled analysis), 0.68 (experts) and 0.72 (residents), considered concurrent. Conclusion: The AO/ASIF simplified classification showed substantial reproducibility and is, therefore, recommended as the most suitable for clinical application. The level of experience of the observers did not influence significantly the agreement between evaluations. Level of Evidence III, Diagnostic Study - Investigating a Diagnostic Test. PMID:25328437

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

    NASA Technical Reports Server (NTRS)

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

    2002-01-01

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

  5. Extrac~ao de Propriedades Sociais em Redes Veiculares Felipe Cunha13

    E-print Network

    Paris-Sud XI, Université de

    Extrac¸~ao de Propriedades Sociais em Redes Veiculares Felipe Cunha13 , Aline Viana3 , Thiago atestar que as Redes Veiculares apresentam comportamento social. Os re- sultados comprovam a exist^encia de rotinas e propriedades sociais nas Redes Veiculares. Finalizando, discute-se sobre novas

  6. Proxy Key Re-encapsulation Mechanism for Group Communications Chunbo Ma and Jun Ao

    E-print Network

    - 1 - Proxy Key Re-encapsulation Mechanism for Group Communications Chunbo Ma and Jun Ao School of Information and Communication, Guilin University of Electronic and Technology, Guilin, Guangxi, 541004, P. R scheme is poor. The key encapsulation is a crucial part in hybrid encryption mechanism, which allows

  7. Equilibrium of Heterogeneous Congestion Control Ao Tang Jiantao Wang Steven H. Low

    E-print Network

    -- When heterogeneous congestion control protocols that react to different pricing signals share the same and congestion prices. Often, interesting and counter- intuitive behaviors arise only in a network setting where1 Equilibrium of Heterogeneous Congestion Control Protocols Ao Tang Jiantao Wang Steven H. Low EAS

  8. Improvement of phase diversity algorithm for non-common path calibration in extreme AO context

    NASA Astrophysics Data System (ADS)

    Robert, Clélia; Fusco, Thierry; Sauvage, Jean-François; Mugnier, Laurent

    2008-07-01

    Exoplanet direct imaging with a ground-based telescope needs a very high performance adaptive optics (AO) system, so-called eXtreme AO (XAO), a coronagraph device, and a smart imaging process. One limitation of AO system in operation remains the Non Common Path Aberrations (NCPA). To achieve the ultimate XAO performance, these aberrations have to be measured with a dedicated wavefront sensor placed in the imaging camera focal plane, and then pre-compensated using the AO closed loop process. In any events, the pre-compensation should minimize the aberrations at the coronagraph focal plane mask. An efficient way for the NCPA measurement is the phase diversity technique. A pixel-wise approach is well-suited to estimate NCPA on large pupils and subsequent projection on the deformable mirror with Cartesian geometry. However it calls for a careful regularization for optimal results. The weight of the regularization is written in close-form for un-supervised tuning. The accuracy of NCPA pre-compensation is below 8 nm for a wide range of conditions. Point-by-point phase estimation improves the accuracy of the Phase Diversity method. The algorithm is validated in simulation and experimentally. It will be implemented in SAXO, the XAO system of the second generation VLT instrument: SPHERE.

  9. Scaling of stochasticity in gene cascades Abhyudai Singh and Jo~ao Pedro Hespanha

    E-print Network

    Hespanha, João Pedro

    first quantify stochastic noise in a single gene GeneX which expresses a protein X. We consider a simpleScaling of stochasticity in gene cascades Abhyudai Singh and Jo~ao Pedro Hespanha Abstract-- Stochastic fluctuations in protein levels are in- evitable due to the probabilistic nature of gene expression

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

    E-print Network

    . Intelig^encia artificial. 2. Semi´otica. 3. Agentes inteligentes. 4. Redes Neurais (Computa¸c~ao). 5 cognitivos capazes de atuar nos mais diversos ambientes e dom´inios. Palavras-chave: intelig^encia artificial networks in the construction of intelligent agents Palavras-chave em Ingl^es: Artificial intelligence

  11. 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.

  12. 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.

  13. Categorização das imagens referentes ao tema equilíbrio químico nos livros aprovados pelo PNLEM

    Microsoft Academic Search

    Gustavo Bizarria Gibin; Keila Bossolani Kiill; Luiz Henrique Ferreira

    Resumo: O presente artigo apresenta uma análise de aspectos das ilustrações referentes ao conteúdo de equilíbrio químico presentes nos seis livros aprovados pelo Programa Nacional do Livro Didático para o Ensino Médio (PNLEM). Os aspectos estudados foram: a finalidade das ilustrações na seqüência didática; o grau de iconicidade; a relação da ilustração com o texto principal; a funcionalidade e as

  14. LDEF (Prelaunch), AO180 : The Effect of Space Environment Exposure on the Properties of Polymer Matr

    NASA Technical Reports Server (NTRS)

    1984-01-01

    LDEF (Prelaunch), AO180 : The Effect of Space Environment Exposure on the Properties of Polymer Matrix Composite Materials, Tray D12 The prelaunch photograph shows the positions of the three (3) LDEF experiments in a three (3) inch deep tray. The AO023 experiment is located in the left one third (1/3rd) section, the AO180 experiment occupies the center one third (1/3rd) section plus the lower one half (1/2) of the right section and the AO019 experiment is shown in the top right section of the tray. The Polymer Matrix Composite Materials experiment is an active experiment that occupies one half (1/2) of the tray's exposed surface area and contains a data acquisition and recording system. The experiment consist of sixty-two (62) composite tubes with aluminum end fittings, forty-five (45) flat composite coupons with aluminum retainer blocks, and one (1) stainless steel calibration tube. The fasteners used to assemble the experiment were non-magnetic stainless steel. The test samples were manufactured from different epoxy matrix composites containing carbon, boron and aramide (Kevlar) reinforcements. A custom data acquisition system was designed to record and store the data from sixteen (16) thermal/strain gauges on a magnetic tape cassette. The data system and batteries to power the system are located beneath the aluminum base plates.

  15. A INTERNET COMO UM MEIO FACILITADOR DA FORMAÇÃO DE PROFESSORES AO LONGO DA VIDA

    Microsoft Academic Search

    Maria José Machado

    1. Introdução Começaremos por enunciar alguns princípios\\/convicções adquiridos ao longo dos anos através de experiências ligadas à Formação de Professores e neste caso no domínio da Tecnologias de Informação e Comunicação (TIC). Poderemos resumir estes princípios\\/convicções da seguinte maneira: - Não é possível manter um sistema educativo actualizado e dinâmico sem que os professores e outros agentes intervenientes no processo

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

    E-print Network

    Instituto de Sistemas e Robotica

    ARTIGO INTERNET Programa da troika "tem de ir evoluindo ao longo do tempo", diz Fernando Ulrich in http://www.oje.pt/ Data: 2011-9-20 Link: http://www.oje.pt/noticias/nac ... Programa da troika "tem de tempo" e que os justos não podem pagar pelos pecadores a nível de cortes. Falando à margem da

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

    E-print Network

    Backhouse, Roland

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

  18. 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

  19. 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

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

    E-print Network

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

  1. 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)

  2. ESO photometric and astrometric analysis program for AO: a programmatic and numerical analysis

    NASA Astrophysics Data System (ADS)

    Currie, Douglas G.; Bonaccini, Domenico; Diolaiti, Emiliano; Tordo, Sebastien; Naesgarde, Katrin; Liwing, Johan; Bendinelli, Orazio; Parmeggiani, Gianluigi; Close, Laird M.

    2000-07-01

    The European Southern Observatory is currently developing an array of software analysis packages to perform Photometry and Astrometry (P&A) on both stellar and diffuse objects observed with Adaptive Optics (AO) Systems. As they are complete, the component programs of ESO-PAPAO will be made available to AO observers using ADONIS on the 3.6 meter telescope at La Silla and, later, those using the various AO systems being developed for the 8.2 meter VLT telescopes at Paranal, such as NAOS- CONICA and MACAO-SINFONI. The performances of the ESO-PAPAO package are being extensively quantified; both to support their use in astrophysical analysis and as a guide for the definition of AO observing programs. The algorithms are being developed in IDL. A user interface allows immediate access to the ESO-PAPAO by observers not familiar with IDL. We will describe the objectives of the ESO-PAPAO; the calibrated ADONIS data sets that have been collected for distribution to contributors to the ESO-PAPAO program, and the methods and results of numerical tests of photometric precision in comparisons of the various different analysis packages. In particular, the STARFINDER program, developed at the University of Bologna in a collaborative effort with ESO, has been applied to data from ADONIS at La Silla, UHAO at Mauna Kea, and HST. Results from the analysis of this astronomical AO data will be presented -- photometric precision of 0.02 to 0.05 magnitudes, and astrometric precision of approximately 0.1 pixel in crowded fields with strong isoplanatic effects.

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

    E-print Network

    Saidak, Filip

    2009-10 Masters/Specialist Degree Recipients by School, Department, Major, AOS Code, and Ethnicity HawDegree Major Description TotalWhite Afr AmSchool Dept AOS Am Ind Asian Multi_ Racial Unknown UNCG 2009, race categories have been modified to align with new required federal definitions, as reported

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

    E-print Network

    Cruz, Frederico

    BUSCA LOCAL PARA P´OS-PROCESSAMENTO EM RESULTADOS DE OTIMIZA¸C~AO MULTI-OBJETIVO EM REDES DE FILAS otimiza¸c~ao de redes de filas finitas, a capacidade total do sistema em ´areas de espera deve ser a menor algoritmo simulated annealing foi desenvolvido, especialmente para redes de filas finitas, produzindo solu

  5. Sistemas Distribuidos e Redes de Sensores Aula 6: Outros Padr~oes disseminac~ao e roteamento

    E-print Network

    Rodriguez, Noemi

    Sistemas Distribu´idos e Redes de Sensores Aula 6: Outros Padr~oes ­ dissemina¸c~ao e roteamento abril de 2013 Sistemas Distribu´idos e Redes de Sensores #12;Padr~oes de programas distribu´idos padr 1991, 49-90. Sistemas Distribu´idos e Redes de Sensores #12;Nota¸c~ao Andrews canais desacoplamento em

  6. The Latin Music Database: Uma Base de Dados Para a Classificac~ao Automatica de G^eneros Musicais

    E-print Network

    Kent, University of

    base de dados nova e in´edita, que foi originalmente criada para experimentos relacionados forma a permitir que a base seja utilizada em outros experimentos. Essa quest~ao s´o foi recentemente cient´ifica ao inv´es de terem sem uso limitado a dois ou tr^es experimentos, como normalmente acontece

  7. Identificac~ao da Doenca de Chagas Baseada em Analise de Sinais de Variabilidade da Frequ^encia Cardiaca

    E-print Network

    Carvalho, João Luiz

    Identifica¸c~ao da Doen¸ca de Chagas Baseada em An´alise de Sinais de Variabilidade da Frequ¸c~ao A doen¸ca de Chagas afeta severamente a funcionalidade do sistema nervoso. A an´alise de sinais da

  8. Actividades de Inovação e a Capacidade Inovadora das Empresas Portuguesas: Evidências Empíricas ao Nível do sector dos Serviços

    Microsoft Academic Search

    Maria José Silva; Gastão Sousa e Jacinta Moreira

    2010-01-01

    Esta investigação visa analisar o grau de importância das actividades de inovação na capacidade inovadora empresarial, no âmbito das empresas de serviços portuguesas. A revisão da literatura considera três abordagens fundamentais ao nível da inovação dos serviços: assimilação, demarcação e síntese. Adicionalmente, apresenta-se a abordagem sistémica com o objectivo de identificar os principais determinantes da inovação, ao nível das actividades

  9. 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.

  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. The Megaplasmid pAO1 of Arthrobacter Nicotinovorans and Nicotine Catabolism

    Microsoft Academic Search

    Petra Ganas; Gabor L. Igloi; Roderich Brandsch

    \\u000a The 165-kb megaplsmid pAO1 of Arthrobacter nicotinovorans enables its host to grow on nicotine as carbon, nitrogen and energy source. The plasmid has a modular structure with DNA\\u000a segments flanked by mobile genetic elements. The presence of gene modules specific for l-nicotine, d-nicotine and ?-N-methylami-nobutyrate catabolism, for the biosyntheses of the molybdenum cofactor required by the molybdenum enzymes of the

  12. Lateral fixation of AO type-B2 ankle fractures: the Acutrak plus compression screw technique

    Microsoft Academic Search

    Yih-Shiunn Lee; Tzu-Liang Hsu; Chien-Rae Huang; Shih-Hao Chen

    2010-01-01

    The Acutrak plus compression screw (APCS) (Acumed Inc., Beaverton, OR, USA) is an intramedullary implant which can achieve\\u000a stable fixation with minimum soft tissue dissection. The characteristics of the APCS include fully-threaded length, headless,\\u000a cannulated, and variable thread pitch. Twenty-three patients with AO type-B2 ankle fractures treated with lateral fixation\\u000a by an APCS were retrospectively reviewed. Evaluation of postoperative roentgenograms

  13. Lateral fixation of open AO type-B2 ankle fractures: the Knowles pin versus plate

    Microsoft Academic Search

    Yih-Shiunn Lee; Shu-Wen Chen

    2009-01-01

    Forty-seven patients with open lateral malleolar (AO type-B2) fractures treated with copious irrigation and radical debridement,\\u000a reduction, and immediate fixation by Knowles pins or lateral plates were retrospectively reviewed with an average follow-up\\u000a period of 29 months. The 47 patients were divided into two groups, based on the method of treatment. The Knowles pin group\\u000a included 25 patients. The plate group

  14. Integration, tests and laboratory performance of SAXO, the VLT-SPHERE extreme AO system

    NASA Astrophysics Data System (ADS)

    Petit, C.; Fusco, T.; Sauvage, J.-F.; Sevin, A.; Suarez, M.; Charton, J.; Baudoz, P.; Beuzit, J.-L.; Buey, T.; Dohlen, K.; Feautrier, P.; Fedrigo, E.; Fleuzry, B.; Gach, J.-L.; Hubin, N.; Kasper, M.; Mouillet, D.; Perret, D.; Puget, P.; Sinquin, J.-C.; Soenke, C.; Wildi, F.

    2011-09-01

    Direct detection and spectral characterization of extra-solar planets is one of the most exciting but also one of the most challenging areas in modern astronomy due to the very large contrast between the host star and the planet at very small angular separations. SPHERE (Spectro-Polarimetric High-contrast Exoplanet Research in Europe) is a second-generation instrument for the ESO VLT dedicated to this scientific objective. It combines an extreme adaptive optics system, various coronagraphic devices and a suite of focal instruments providing imaging, integral field spectroscopy and polarimetry capabilities in the visible and near-infrared spectral ranges. The extreme AO system, SAXO, is the heart of the SPHERE system, providing to the scientific instruments a flat wavefront corrected from all the atmospheric turbulence and internal defects. We will present a status of SAXO assembly integration and performance. The main requirements and system characteristics will be recalled, then each sub system will be individually presented and fully characterized and finally the full AO loop performance will be quantified. It will be demonstrated that SAXO will meet its challenging requirements (more than 90% of SR in H band with a residual jitter lower than 3 milli-arcseconds for average observation conditions on the VLT). Thanks to a coronagraphic analysis of the AO residuals, a detailed comparison between actual and simulated residual intensity profiles will be provided and will help to adjust the expected performance of the SPHERE system on sky, knowing that its first light is foreseen for mid 2012.

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

    NASA Technical Reports Server (NTRS)

    Assie, Jean Pierre; Conde, Eric

    1991-01-01

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

  16. New Frontiers in Circumstellar Science with MagAO's Visible Light Simultaneous Differential Imaging Mode

    NASA Astrophysics Data System (ADS)

    Follette, K.; Close, L.; Males, J.; Morzinski, K.; Wu, Y.-L.

    2014-03-01

    We report first light results from the revolutionary Simultaneous Differential Imaging (SDI) mode of the Magellan Adaptive Optics (MagAO) system. This visible light AO imaging mode allows for high contrast differential imaging at resolutions as high as 20mas in hydrogen-alpha, [OI] and [SII]. Simultaneous acquisition of a continuum PSF allows for simple and robust PSF subtraction, opening up even the innermost regions of circumstellar disks to direct imaging. Early results include the first circumstellar disk imaged in silhouette at visible wavelengths with adaptive optics and the tightest (83mas) directly imaged young stellar companion to date, among others. The particular success of the H-alpha SDI imaging mode has led us to embark on the Giant Accreting Planets Survey (GAPlanetS), which will survey 15+ nearby transitional circumstellar disks in search of accreting protoplanets. We will report on plans for this survey and discuss current and future science plans, upgrades and capabilities for MagAO SDI.

  17. AO modelling for wide-field E-ELT instrumentation using Monte-Carlo simulation

    NASA Astrophysics Data System (ADS)

    Basden, Alastair; Morris, Simon; Morris, Tim; Myers, Richard

    2014-08-01

    Extensive simulations of AO performance for several E-ELT instruments (including EAGLE, MOSAIC, HIRES and MAORY) have been ongoing using the Monte-Carlo Durham AO Simulation Package. We present the latest simulation results, including studies into DM requirements, dependencies of performance on asterism, detailed point spread function generation, accurate telescope modelling, and studies of laser guide star effects. Details of simulations will be given, including the use of optical models of the E-ELT to generate wave- front sensor pupil illumination functions, laser guide star modelling, and investigations of different many-layer atmospheric profiles. We discuss issues related to ELT-scale simulation, how we have overcome these, and how we will be approaching forthcoming issues such as modelling of advanced wavefront control, multi-rate wavefront sensing, and advanced treatment of extended laser guide star spots. We also present progress made on integrating simulation with AO real-time control systems. The impact of simulation outcomes on instrument design studies will be discussed, and the ongoing work plan presented.

  18. CCM0118 --Computac~ao I Curso de Ci^encias Moleculares --Turma 22 --Segundo Semestre de 2012

    E-print Network

    Reverbel, Francisco

    de 16 bits. #12;Quest~ao 2 (1,5 + 1,5 pontos) Defini¸c~ao: A raiz quadrada inteira de um inteiro n > 0 ´e definida como o maior inteiro r tal que r2 n. Exemplos: a raiz quadrada inteira de 10 ´e 3, a de 21 ´e 4 e a de 25 ´e 5. (a) Escreva uma fun¸c~ao raiz quadrada, que receba um inteiro n > 0 e

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

    NASA Technical Reports Server (NTRS)

    Crawford, Bradley L.; Spells, Courtney

    2006-01-01

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

  20. Dual AO/EB Staining to Detect Apoptosis in Osteosarcoma Cells Compared with Flow Cytometry

    PubMed Central

    Liu, Kuan; Liu, Peng-cheng; Liu, Run; Wu, Xing

    2015-01-01

    Background The aim of this study was to evaluate the ability of dual acridine orange/ethidium bromide (AO/EB) staining to detect tumor cell apoptosis. According to apoptosis-associated changes of cell membranes during the process of apoptosis, a clear distinction is made between normal cells, early and late apoptotic cells, and necrotic cells. Material/Method We cultured human osteosarcoma cells with 30, 60, and 120 ?g/ml kappa-selenocarrageenan. To assess the rates of cell proliferation and apoptosis, cells were fluorescently stained with acridine orange/ethidium bromide (AO/EB) or stained with propidium iodide (PI) and analyzed by flow cytometry. All experiments were repeated at least 3 times. Result Normal tumor cells, early and late apoptotic cells, and necrotic cells were examined using fluorescent microscopy. Early-stage apoptotic cells were marked by crescent-shaped or granular yellow-green acridine orange nuclear staining. Late-stage apoptotic cells were marked with concentrated and asymmetrically localized orange nuclear ethidium bromide staining. Necrotic cells increased in volume and showed uneven orange-red fluorescence at their periphery. Cells appeared to be in the process of disintegrating. The percentage of apoptotic osteosarcoma cells detected by dual acridine orange/ethidium bromide (AO/EB) staining was not significantly different from that detected using flow cytometry (P>0.05). Conclusions Our results suggest that dual acridine orange/ethidium bromide staining is an economic and convenient method to detect apoptosis in tumor cells and to test tumor chemosensitivity compared with flow cytometry. PMID:25664686

  1. Determinação de regiões de órbitas diretas estáveis ao redor da Lua

    NASA Astrophysics Data System (ADS)

    de Melo, C. F.; Winter, O. C.; Vieira Neto, E.

    2003-08-01

    Neste Trabalho estamos investigando regiões do sistema Terra-Lua que contêm órbitas diretas estáveis ao redor da Lua visando a utilização destas órbitas em futuras missões de veículos espaciais como alternativas de trajetórias com baixo custo de manutenção. Adotando-se o problema restrito de três corpos, Terra-Lua-partícula, a localização e a extensão destas regiões de estabilidade foram investigadas numericamente considerando como estável toda órbita que permanece ao redor a Lua por, no mínimo, 1000 dias com energia de dois corpos da partícula em relação à Lua negativa. A estabilidade de tais regiões está associada a duas famílias de órbitas periódicas simples H1 e H2 e a órbitas quase-periódicas associadas a elas. Uma vez identificadas as regiões de estabilidade passamos a analisá-las introduzindo, paulatinamente, outras interações relevantes ao sistema como as perturbações do Sol (via problema restrito de quatro corpos), das marés, da pressão de radiação e do achatamento terrestre. Os resultados encontrados até o momento mostram que a perturbação do Sol é a única que reduz significativamente o tamanho das regiões de estabilidade. Também estamos investigando o comportamento de tais regiões quando características intrínsecas do sistema como as excentricidades das órbitas da Terra e da Lua e a inclinação da órbita Lua são consideradas. Com este estudo estamos reunindo informações que nos permitirão compreender a evolução das regiões de estabilidade no sistema Terra-Lua, bem como estabelecer parâmetros adequados para a utilização das trajetórias estáveis em futuras missões espaciais. Agradecimentos: Este projeto conta com o apoio do CNPq, da Capes e da Fapesp.

  2. Simulación numérica del transporte del herbicida glifosato en la zona no saturada

    Microsoft Academic Search

    L. Guarracino; L. Candela Lledó; J. E. Santos

    1999-01-01

    RESUMEN. La simulación numérica junto con los experimentos de campo constituyen herramientas imprescindibles para el estudio del transporte de agua y de sustancias contaminantes en el subsuelo. El objetivo de este trabajo es presentar un modelo numérico para describir la migración de un contaminante sometido a procesos de adsorción y de degradación en la zona no saturada (ZNS) del terreno.

  3. Preliminary results from the chemistry of micrometeoroid experiment (AO 187-1)

    NASA Technical Reports Server (NTRS)

    Horz, Friedrich; Bernhard, R. P.; See, Thomas H.; Warren, J.; Brownlee, Don E.; Laurance, M.

    1991-01-01

    The purpose of experiment AO 187-1 was to expose high purity substrates of suitable cratering properties to obtain detailed crater statistics that may be converted into projectile masses and fluxes and to chemically characterize as many impactors as possible. The latter information would hopefully reveal distinct classes of natural and man-made particles in low-Earth orbit. It was found that crater that yield residues show that natural and man-made impactors may be differentiated and that diversity exists within each group. 'Chondritic' compositions dominate among natural particles, yet some craters contain unmelted fragments of minerals (Olivine and pyroxene).

  4. LDEF (Prelaunch), AO187-01 : The Chemistry of Micrometeoroids, Tray A03

    NASA Technical Reports Server (NTRS)

    1984-01-01

    LDEF (Prelaunch), AO187-01 : The Chemistry of Micrometeoroids, Tray A03 The prelaunch photograph shows the two (2) clam shell type canisters in their closed position. The canister shells are made of aluminum sheet material with end caps of diecast aluminum. The baseplate and support structure are fabricated from 6000 series aluminum. Fasteners are non-magnetic stainless steel. The electrical box and the stainless steel tubing located on the baseplate protect the drive system wiring. The experiment contains a timing mechanism that provides the intelligence to open the canisters after the Orbiter has departed the area and any initial outgassing or offgassing has occurred.

  5. 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.

  6. LDEF (Postflight), AO180 : The Effect of Space Environment Exposure on the Properties of Polymer Mat

    NASA Technical Reports Server (NTRS)

    1990-01-01

    LDEF (Postflight), AO180 : The Effect of Space Environment Exposure on the Properties of Polymer Matrix Composite Materials, Tray D12 The postflight photograph was taken in the SAEF-II facility prior to removal of experiment trays from the LDEF. The Polymer Matrix Composite Materials experiment appears the same as in the flight photograph. The composite containing the aramid (Kevlar) fibers has changed from a yellow to a light brown color and the cylinderical tubes containing the boron and carbon fiber materials have changed from a light green tint to a brown color. The experiment mounting hardware and fasteners seem to be intact and in very good condition.

  7. Imprints of The Northern Mode (NAO/ao) On The Distribution of Col Systems

    NASA Astrophysics Data System (ADS)

    Nieto, R.; Gimeno, L.; Ribera, P.; Gallego, D.; Garcia, R.; Hernandez, E.; de La Torre, L.

    The distribution of cu-off low systems (COLs) could be an interesting climate diagno- sis parameter in the dabate about the regional character of North Atlantic Oscillation (NAO) versus the hemisferic character of the Arctic Oscillation (AO). COL systems are usually closed circulations at middle and upper troposphere developed from a deep trough in the westerlies (Palmen and Newton, 1969; Winkler et al., 2000). These sys- tems are largerly influenced by blocking and consequently their number, size, temporal and spatial distribution should be affected by the NAO / AO. This would be a point in favour of the NAO paradigm versus AO paradigm as recognized by Wallace (2000). Cut-off low systems were identified in the band 20zN-70zN using data from the re- analysis NCEP-NCAR for the period from 1958 to 1998. To quantify NAO we use the 41 winter values of NAO index as the normalized pressure difference between Ponta Delgada (Azores) and Reykjavik (Iceland). An automated procedure was developed to identify individual cut-off lows. COL sys- tems were determinated according to the following five steps procedure: 1)Minimum of 200hPa geopotential, 2)Cut-off circulation, 3) Minimum of equivalent thickness, 4) A baroclinic area, 5) Thermodinamic inestability. The areas of most frecuent occurrence(Atlantic Ocean around 20zW-20zE and 37zN- 44zN and in the Pacific area around 120zW-135W and 33z N-41zN) are the same in the two phases of NAO but there are a significant difference: the density of COL systems are higher during NAO positive phase than during NAO negative phase, the density in the negative phase is about the third part of the density in the positive phase. A variability associated to NAO in the frecuency of COL systems centered in both sides of the atlantic area is a clear support for the NAO paradigm vs. AO paradigm.

  8. NOAA Technical Memorandum GLERL-152 The Impacts of ENSO and AO/NAO on the Interannual Variability of Great

    E-print Network

    of Great Lakes Ice Cover Xuezhi Bai, Jia Wang, Cynthia Sellinger, Anne Clites, and Raymond Assel NOAA ................................................................................................. 13 4. GREAT LAKES ICE COVER AND ENSO......................................................................... 19 5. GREAT LAKES ICE COVER AND AO

  9. The properties and performance of poly AO™-79; A nonabsorbable, polymeric antioxidant intended for use in foods

    Microsoft Academic Search

    Thomas E. Furia; Nicolo Bellanca

    1977-01-01

    and Summary  The physical, chemical, and biological characteristics of Poly AO™-79, a composition selected from a class of polymers prepared\\u000a by the polycondensation of divinylbenzene and a blend of various sterically hindered phenols and hydroquinone, are discussed.\\u000a Data are presented indicating that Poly AO™-79 demonstrates excellent antioxidant activity in stabilizing vegetable oils when\\u000a compared to monomeric food grade antioxidants [butylated hydroxytoluene

  10. Novos algoritmos de Lagrangeano aumentado com penalidade quadratica aplicados a problemas de otimizac~ao com restric~oes de igualdade

    E-print Network

    Paraná, Universidade Federal do

    ´a - UNESPAR\\FECILCAM Campo Mour~ao -PR solaregina@fecilcam.br RESUMO Nesta palestra, ser~ao apresentados dois~ao linear; Lagrangeano augmentado; Fun¸c~oes de penalidade; Experimentos num´ericos. Refer^encias E. G

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

    NASA Technical Reports Server (NTRS)

    1990-01-01

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

  12. Instrument control software development process for the multi-star AO system ARGOS

    NASA Astrophysics Data System (ADS)

    Kulas, M.; Barl, L.; Borelli, J. L.; Gässler, W.; Rabien, S.

    2012-09-01

    The ARGOS project (Advanced Rayleigh guided Ground layer adaptive Optics System) will upgrade the Large Binocular Telescope (LBT) with an AO System consisting of six Rayleigh laser guide stars. This adaptive optics system integrates several control loops and many different components like lasers, calibration swing arms and slope computers that are dispersed throughout the telescope. The purpose of the instrument control software (ICS) is running this AO system and providing convenient client interfaces to the instruments and the control loops. The challenges for the ARGOS ICS are the development of a distributed and safety-critical software system with no defects in a short time, the creation of huge and complex software programs with a maintainable code base, the delivery of software components with the desired functionality and the support of geographically distributed project partners. To tackle these difficult tasks, the ARGOS software engineers reuse existing software like the novel middleware from LINC-NIRVANA, an instrument for the LBT, provide many tests at different functional levels like unit tests and regression tests, agree about code and architecture style and deliver software incrementally while closely collaborating with the project partners. Many ARGOS ICS components are already successfully in use in the laboratories for testing ARGOS control loops.

  13. LDEF (Prelaunch), AO171 : Solar-Array-Materials Passive LDEF Experiment, Tray A08

    NASA Technical Reports Server (NTRS)

    1984-01-01

    LDEF (Prelaunch), AO171 : Solar-Array-Materials Passive LDEF Experiment, Tray A08 EL-1994-00044 LDEF (Prelaunch), AO171 : Solar-Array-Materials Passive LDEF Experiment, Tray A08 The prelaunch photograph was taken in SAEF II at KSC prior to installation of the Solar Array Materials Passive LDEF Experiment (SAMPLE) on the LDEF. Six (6) plates of passive components, provided by various experiment organizations and designated plate I thru plate VI, are shown mounted in a three (3) inch deep LDEF peripheral tray. All six plates are aluminum and attach to the LDEF experiment tray with non-magnetic stainless steel fasteners. Plate I, located in the upper right corner, consist of a combination of solar cells with and without covers, solar cell modules and solar arrays assembled on the baseplate. Plate II in the upper center section, has twenty seven (27) composite samples, carbon fiber and glass fiber, mounted on the baseplate. Plate III, in the upper left corner, consist mostly of metallized and thin polymeric films (Kapton, Mylar, TEFLON® , white Tedlar,etc.). Plate IV located in the lower right corner consist of metals and coatings mounted in an aluminum baseplate and covered with a thin aluminum coverplate that partially mask the specimen. Plate V contained thermal plastics and structural film configured into tensile and shear specimen. Plate VI was populated with solar cells and associate components (covers, encapsulants,adhesives, etc.).

  14. LDEF (Postflight), AO187-01 : The Chemistry of Micrometeoroids, Tray A03

    NASA Technical Reports Server (NTRS)

    1990-01-01

    LDEF (Postflight), AO187-01 : The Chemistry of Micrometeoroids, Tray A03 EL-1994-00266 LDEF (Postflight), AO187-01 : The Chemistry of Micrometeoroids, Tray A03 The experiment is shown in the postflight configuration before closing the canisters with ground support equipment that bypassed the experiments onboard electronics circuitry. Three full panels and approximately 3/4th of the other panel are covered with gold foil (>99.99 percent pure). The remaining area on the fourth panel is covered with strips of other detector materials: zirconium, beryllium, titanium, platium, aluminum, carbon, Kapton, polyethylene and TEFLON®. A brown stain is visible on the experiment tray flanges, however, most of the stains observed in the flight photograph are obscured by reflected light. All materials remain intact with no visual evidence of damage to the experiment. The reflection of a video camera on a tripod and light sources can be seen on the gold foil covered panels. The experiment canisters are shown after being closed by using the experiments ground support equipment. The stain buildup can be clearly seen at the vertical center of the right tray flange. The clean area was located under the experiment tray clamp block and was not exposed to the staining medium. The stain also coats other areas that were exposed during the mission but are not as noticeable. The experiment hardware seems to be intact and have no damage.

  15. Robotic Laser Adaptive Optics Imaging of 715 Kepler Exoplanet Candidates Using Robo-AO

    NASA Astrophysics Data System (ADS)

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

    2014-08-01

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

  16. Robotic Laser-Adaptive-Optics Imaging of 715 Kepler Exoplanet Candidates using Robo-AO

    E-print Network

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

    2013-01-01

    The Robo-AO Kepler Planetary Candidate Survey is designed to observe every Kepler planet candidate host star with laser adaptive optics imaging to search for blended nearby stars, which may be physically associated companions and/or responsible for transit false positives. In this paper we present the results from the 2012 observing season, searching for stars close to 715 representative Kepler planet candidate hosts. We find 53 companions, 44 of which are new discoveries. We detail the Robo-AO survey data reduction methods including a method of using the large ensemble of target observations as mutual point-spread-function references, along with a new automated companion-detection algorithm designed for large adaptive optics surveys. Our survey is sensitive to objects from 0.15" to 2.5" separation, with contrast ratios up to delta-m~6. We measure an overall nearby-star-probability for Kepler planet candidates of 7.4% +/- 1.0%, and calculate the effects of each detected nearby star on the Kepler-measured plan...

  17. A Fresh Look at the Algol-like Eclipsing Binary, AO Ser

    NASA Astrophysics Data System (ADS)

    Alton, Kevin B.; Prsa, Andrej

    2012-05-01

    CCD images acquired in B, V, and Ic passbands between July and August 2008 and from June to August 2010 were used to revise the ephemeris and update the orbital period for AO Ser. Analysis of the O-C diagram using all available time-of-minima data revealed a continually increasing orbital period for at least 68 years. Thereafter, a sudden decrease in orbital period (~0.84 sec) most likely occurred during the first few months of 1998; potential causes for this abrupt jump and other alternating changes in period are discussed. Although the spectral classification of the primary star has been long considered A2V (Teff ~8800 K), B-V data from this study as well as color index estimates from several other recent survey catalogs suggest a significantly cooler A7V (Teff ~7800 K) primary. A semi-detached Roche model of the binary produced theoretical fits matching light curve data in all passbands. AO Ser is reported to be an oscillating Algol-type variable star referred to as an oEA system. Using Fourier methods, lightcurve analysis in this study did not convincingly reveal any underlying periodicity other than that expected from the dominant orbital period.

  18. The Influence of Dominant Global Climate Phenomena ENSO, NAO, and AO on Climate in Serbia

    NASA Astrophysics Data System (ADS)

    Jovanovic, G.; Reljin, I.; Reljin, B.

    2010-09-01

    The relationship between El Ni?o and temperatures in Serbia has been proved. Certain correlation among the average monthly temperatures in Serbia and in Ni?o 3,4 region, with three months delay, has been found. The fractal analysis of these temperature series was performed via R/S statistic indicating fractal and multifractal (MF) nature of processes. The calculation of cross-correlation coefficients between NAO index and precipitation, temperature, and pressure data in Serbia has proved considerable NAO influence on Serbia region, especially during winter. The following correlation values were obtained between NAO Index and: pressure 0.60, temperature 0,64, both for Belgrade, while for Niksic negative cross-correlation was obtained for precipitation -0,53. The fractal and multifractal analyses of pressure data series on a number of stations in a wide region from Azores to Iceland and Serbia were done. The obtained results showed that each station in the region has characteristic multifractal spectra of pressure data. The teleconnection with NAO has been also proved by the comparisons of EOF analysis of pressure field in Serbia with the EOF for the north Atlantic domain. The analyses of NAO influence based on daily precipitation data on stations in Serbia and NAO daily index plus AO daily index were prepared, too. These results suggest that AO influence in Serbia is more prominent than the one obtained for NAO.

  19. 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.

  20. l-Fucose Stimulates Utilization of d-Ribose by Escherichia coli MG1655 ?fucAO and E. coli Nissle 1917 ?fucAO Mutants in the Mouse Intestine and in M9 Minimal Medium?

    PubMed Central

    Autieri, Steven M.; Lins, Jeremy J.; Leatham, Mary P.; Laux, David C.; Conway, Tyrrell; Cohen, Paul S.

    2007-01-01

    Escherichia coli MG1655 uses several sugars for growth in the mouse intestine. To determine the roles of l-fucose and d-ribose, an E. coli MG1655 ?fucAO mutant and an E. coli MG1655 ?rbsK mutant were fed separately to mice along with wild-type E. coli MG1655. The E. coli MG1655 ?fucAO mutant colonized the intestine at a level 2 orders of magnitude lower than that of the wild type, but the E. coli MG1655 ?rbsK mutant and the wild type colonized at nearly identical levels. Surprisingly, an E. coli MG1655 ?fucAO ?rbsK mutant was eliminated from the intestine by either wild-type E. coli MG1655 or E. coli MG1655 ?fucAO, suggesting that the ?fucAO mutant switches to ribose in vivo. Indeed, in vitro growth experiments showed that l-fucose stimulated utilization of d-ribose by the E. coli MG1655 ?fucAO mutant but not by an E. coli MG1655 ?fucK mutant. Since the ?fucK mutant cannot convert l-fuculose to l-fuculose-1-phosphate, whereas the ?fucAO mutant accumulates l-fuculose-1-phosphate, the data suggest that l-fuculose-1-phosphate stimulates growth on ribose both in the intestine and in vitro. An E. coli Nissle 1917 ?fucAO mutant, derived from a human probiotic commensal strain, acted in a manner identical to that of E. coli MG1655 ?fucAO in vivo and in vitro. Furthermore, l-fucose at a concentration too low to support growth stimulated the utilization of ribose by the wild-type E. coli strains in vitro. Collectively, the data suggest that l-fuculose-1-phosphate plays a role in the regulation of ribose usage as a carbon source by E. coli MG1655 and E. coli Nissle 1917 in the mouse intestine. PMID:17709419

  1. The variability and periods in the BL Lac AO 0235+164

    NASA Astrophysics Data System (ADS)

    Fan, J. H.; Kurtanidze, O.; Liu, X.; Liu, Y.; Wang, H. T.; Yuan, Y. H.; Hao, J. M.; Wu, D. X.; Cai, W.; Xiao, H. B.; Pei, Z. Y.

    2015-03-01

    Variability is one of the extreme observational properties of BL Lacertae objects. AO 0235+164 is a well studied BL Lac through the whole electro-magnetic wavebands, it is violently variable in the optical bands. In the present work, we show its optical R band photometric observations carried out during the period of Nov. 2006 to Dec. 2012 using the Ap6E CCD camera attached to the primary focus of the 70 cm meniscus telescope at Abastumani Observatory, Georgia. It shows a large variation of ?R = 4.88 mag (14.20 - 19.08 mag) during our monitoring period. When periodicity analysis methods are adopted to its R observations from our Abastumani monitoring programme and those in the literature, the signs of some periods, P 1 = 8.26 yr, P 2 = 0.55 yr, P 3 = 0.85 yr, P 4 = 1.99 yr are found.

  2. [Experiment study on real-time controlling rules of A/O nitrogen removal process].

    PubMed

    Du, Hong; Ma, Yong; Peng, Yong-Zhen; Wang, Bao-Zhen

    2005-07-01

    The aim of this work is operational optimization of an A/O process in the lab plant with synthetic wastewater for improving nitrogen removal efficiency. Ammonia control aims at maintaining the required concentration of ammonia in the effluent by manipulating the dissolved oxygen (DO) set point and aeration volumes. Nitrate control aims at the optimal use of the denitrification potential at any moment by continuously adjusting the internal recirculation flow or (and) external carbon addition flow in order to maintain a desired nitrate set point in the anoxic zone. The control strategies have been based on a hierarchical structure where a high level or supervisory control selects the set point of the low level or conventional controllers. Results indicated that it was possible to increase nitrogen removal efficiency, improve the effluent water quality, save energy, and reduce operating costs. PMID:16212176

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

    NASA Astrophysics Data System (ADS)

    Hong-tao, Wang

    2014-03-01

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

  4. LDEF (Flight), AO180 : The Effect of Space Environment Exposure on the Properties of Polymer Matrix

    NASA Technical Reports Server (NTRS)

    1990-01-01

    LDEF (Flight), AO180 : The Effect of Space Environment Exposure on the Properties of Polymer Matrix Composite Materials, Tray D12 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 white paint dots on experiment tray clamps along the lower edge of the tray. The Polymer Matrix Composite Materials experiment has several changes to material colors. The composite containing the aramid (Kevlar) fibers has changed from a yellow to a light brown color and the cylindrical tubes containing the boron and carbon fiber materials have changed from a light green tint to a brown color.

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

    NASA Technical Reports Server (NTRS)

    1990-01-01

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

  6. LDEF (Postflight), AO015 : Free-Flyer Biostack Experiment, Tray G02

    NASA Technical Reports Server (NTRS)

    1990-01-01

    LDEF (Postflight), AO015 : Free-Flyer Biostack Experiment, Tray G02 The post flight photograph was taken in the SAEF II at KSC after the experiment tray was removed from the LDEF. The experiment tray flanges and sidewalls have become discolored with a light tan stain except where the tray clamp blocks were located. The Biostack experiment appears to have survived the extended mission with no visible damage. The experiment housings are intact and all hardware is securely in place. The detector housings appear to be discolored with a stain similar to that on the tray hardware. The exposed Kapton H foil covering windows in two (2) detector housings do not appear to have sustained damage dur ing the extended mission. The perforated dome on two (2) of the detector housings has a slight tan discoloration but no indication of damage.

  7. 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.

  8. Goals, Strategies and First Discoveries of AO327, the Arecibo All-sky 327 MHz Drift Pulsar Survey

    NASA Astrophysics Data System (ADS)

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

    2013-09-01

    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.

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

    PubMed

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

    2012-01-01

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

  10. LDEF (Postflight), AO171 : Solar-Array-Materials Passive LDEF Experiment, Tray A08

    NASA Technical Reports Server (NTRS)

    1990-01-01

    LDEF (Postflight), AO171 : Solar-Array-Materials Passive LDEF Experiment, Tray A08 EL-1994-00147 LDEF (Postflight), AO171 : Solar-Array-Materials Passive LDEF Experiment, Tray A08 The post flight photograph was taken in the SAEF II at KSC prior to removal of the experiment tray from the LDEF and shows the Solar Array Materials Passive LDEF Experiment (SAMPLE) on the LDEF. Six (6) plates of passive components, provided by various experiment organizations and designated plate I thru plate VI, are shown mounted in a three (3) inch deep LDEF peripheral tray. All six plates are aluminum and attach to the LDEF experiment tray with non-magnetic stainless steel fasteners. Plate I, located in the upper right corner, consist of a combination of solar cells with and without covers, solar cell modules and solar arrays assembled on the baseplate. Three of the four solar arrays are missing. Other components appear to be secure. Plate II in the top center section, has twenty seven (27) composite samples, carbon fiber and glass fiber, mounted on the baseplate. The composites appear to be intact with no physical damage. Plate III, in the upper left corner, consist of metallized and thin polymeric films (Kapton, Mylar, TEFLON® , white Tedlar,etc.). The thin films without protective coatings sustained significant damage and most were destroyed. The thin film specimen hanging by one end in the flight photograph is missing. The metallized film apparently survived the mission with minimum damage. Plate IV located in the lower right corner consist of metals and coatings mounted in an aluminum baseplate and covered with a thin aluminum coverplate that partially mask the specimen. Several of the coatings appear to have darkened and a unique pattern of light brown discoloration appears around the outer edges of the mounting plate and along the lower edge of the coverplates. Plate V, in the lower center section, contained thermal plastics and structural film configured into tensile and shear specimen. All specimen, including the tape holding down the small specimen in the lower right corner, have darkened significantly during the extended time in space. Plate VI, in the lower left corner, is populated with solar cells and associated components such as covers, encapsulants,adhesives, etc. The solar cell components appear to be intact with no apparent physical damage.The colors of the specimen, however, appear to have darkened. The photographic lighting angle has significantly highlighted abrasions on the mounting plate surface.

  11. LDEF (Flight), AO171 : Solar-Array-Materials Passive LDEF Experiment, Tray A08

    NASA Technical Reports Server (NTRS)

    1990-01-01

    LDEF (Flight), AO171 : Solar-Array-Materials Passive LDEF Experiment, Tray A08 EL-1994-00666 LDEF (Flight), AO171 : Solar-Array-Materials Passive LDEF Experiment, Tray A08 The flight photograph was taken from the Orbiter aft flight deck during the LDEF retrieval prior to berthing the LDEF in the Orbiter cargo bay and shows the Solar Array Materials Passive LDEF Experiment (SAMPLE) on the LDEF. Six (6) plates of passive components, provided by various experiment organizations and designated plate I thru plate VI, are shown mounted in a three (3) inch deep LDEF peripheral tray. All six plates are aluminum and attach to the LDEF experiment tray with non-magnetic stainless steel fasteners. Plate I, located in the upper left corner, consist of a combination of solar cells with and without covers, solar cell modules and solar arrays assembled on the baseplate. Two of the four solar arrays are missing and one appears to be attached at only one corner. Other components appear to be secure. Plate II in the left center section, has twenty-seven (27) composite samples, carbon fiber and glass fiber, mounted on the baseplate. The composites appear to be intact with no physical damage. Plate III, in the lower left corner, consist mostly of metallized and thin polymeric films (Kapton, Mylar, TEFLON® , white Tedlar,etc.). The thin films without protective coatings sustained significant damage and most were destroyed. The metallized film apparently survived with minimum damage. Plate IV located in the upper right corner consist of metals and coatings mounted in an aluminum baseplate and covered with a thin aluminum coverplate that partially mask the specimen. Several of the coatings appear to have changed to a darker color and a light brown discoloration appears around the outer edges of the mounting plate and along the right edge of the coverplates. Plate V, in the right center section, contained thermal plastics and structural film configured into tensile and shear specimen. All specimens, including the tape holding down the small specimen in the lower right corner, have darkened significantly during the extended time in space. Plate VI, in the lower right corner, is populated with solar cells and associated components such as covers, encapsulants,adhesives, etc.. The solar cell components appear to be intact with no apparent physical damage.The colors of the specimen, however, appear to have darkened.

  12. Calculo Numerico -Segunda Prova -29/11/05 Considere a populac~ao dos E.U.A. em milhares de pessoas dada pela tabela seguinte

    E-print Network

    Sussner, Peter

    Segunda Ordem para estimar a popula¸c~ao ap´os 1 e ap´os 2 anos. [2, 0 pts] (b) Explique os conceitos deC´alculo Num´erico - Segunda Prova - 29/11/05 1 Considere a popula¸c~ao dos E.U.A. em milhares de pessoas dada pela tabela seguinte: Ano 1930 1960 1990 Popula¸c~ao 132, 2 179, 3 249, 6 (a) Utilize

  13. 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).

  14. 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.

  15. 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.

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

    PubMed Central

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

    2014-01-01

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

  17. 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.

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

    NASA Astrophysics Data System (ADS)

    Crass, Jonathan; King, David; Mackay, Craig

    2013-12-01

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

  19. 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

  20. JOURNAL DE PHYSIQUE Colloque C4, supplbment au n o 8, Tome 47, aoSt 1986

    E-print Network

    Paris-Sud XI, Université de

    collisions is concentrated on two topics: first, one would like to infer the properties of nuclear matterJOURNAL DE PHYSIQUE Colloque C4, supplbment au n o 8, Tome 47, aoSt 1986 MICROS'COPIC THEORY OF MULTIFRAGMENTATION IN HIGH ENERGY HEAVY-ION COLLISIONS A. ROSENHAUER, J. AICHELIN' , H. STOCKER( ) and W. GREINER

  1. Sensing limitations in the Lion and Man problem Shaunak D. Bopardikar Francesco Bullo Jo~ao P. Hespanha

    E-print Network

    Hespanha, João Pedro

    Sensing limitations in the Lion and Man problem Shaunak D. Bopardikar Francesco Bullo Jo~ao P. Hespanha Abstract-- We address the discrete-time Lion and Man prob- lem in a bounded, convex, planar to a previously-studied problem with unlimited sensing, which allows us to use the established Lion strategy

  2. INVESTIGAC~AO DA LINGUAGEM PDDL NO PLANEJAMENTO DE MISS~OES PARA ROB^OS AEREOS

    E-print Network

    Chaimowicz, Luiz

    limita¸c~oes. Palavras-chave-- Intelig^encia Artificial, Planejamento autom´atico, PDDL, VAANTs 1 Introdu and to further explore PDDL and its limitations. Keywords-- Artificial Intelligence, Automated Planning, PDDL executadas (por ve´iculo) para o cumprimento da miss~ao. No campo da intelig^encia artigicial (IA), existe

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

    NASA Astrophysics Data System (ADS)

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

    2015-02-01

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

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

    E-print Network

    Instituto de Sistemas e Robotica

    AINDA HA ESTÁGIOS DE LUXOSão bem pagos, podem incluir viagens ao estrangeiro e a taxa de avaliação e aprendizagem. «� uma forma de imersão completa no negócio, de ficar a conhecer bem a empresa, e

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

    PubMed Central

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

    2015-01-01

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

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

    PubMed

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

    2015-01-01

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

  7. 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

  8. 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.

  9. 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.

  10. 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.

  11. The Hydrography in Shen-ao Bay, North Taiwan, without Thermal Plume

    NASA Astrophysics Data System (ADS)

    Wu, C.; Hu, J.; Lee, C.

    2009-12-01

    Located at northern Taiwan, the Shen-ao Bay is characterized by thermal plume of a power plant and fresh water of the Jiu-fen Brook, causing the surface water of high temperature and low salinity which makes a significant stratification against the subsurface water. The power plant was extended in 2008 and stopped discharging warm water for one year, providing an opportunity to survey the hydrographic and current fields of the bay in natural condition. During 2005~2009, there were seven times hydrographic surveys in the bay and four times aside the coast. When the plume appeared, the surface water could be 2~4 degree warmer than the subsurface water. The surface warm water disappeared when the power plant was shutdown. In such a circumstance, the brook water might even cause the surface water cooler than the subsurface water. After the thermal plume was terminated, coastal temperature descended about 8 degree in June-July and 6 degree in August-September. The ADP (Acoustic Doppler Profiler) and CTD surveys disclosed a bottom cold water intrusion which did not relate to the tidal current and almost happened in 2~5 hours after sunset. The observations of hydrographic field together with local winds revealed that the bottom intrusion was induced by the land breath. In summer, the daily intrusion occurred earlier, thicker and staying longer than in winter. Despite the plume existed or not, the temperature profiles in the bay of a depth shallower than 20 m could become a 3-stepwise pattern under the bottom cold water intrusion.

  12. Malate synthase gene AoMls in the nematode-trapping fungus Arthrobotrys oligospora contributes to conidiation, trap formation, and pathogenicity.

    PubMed

    Zhao, Xinying; Wang, Yunchuan; Zhao, Yong; Huang, Yan; Zhang, Ke-Qin; Yang, Jinkui

    2014-03-01

    Malate synthase (Mls), a key enzyme in the glyoxylate cycle, is required for virulence in microbial pathogens. In this study, we identified the AoMls gene from the nematode-trapping fungus Arthobotrys oligospora. The gene contains 4 introns and encodes a polypeptide of 540 amino acids. To characterize the function of AoMls in A. oligospora, we disrupted it by homologous recombination, and the ?AoMls mutants were confirmed by PCR and Southern blot analyses. The growth rate and colony morphology of the ?AoMls mutants showed no obvious difference from the wild-type strains on potato dextrose agar (PDA) plate. However, the disruption of gene AoMls led to a significant reduction in conidiation, failure to utilize fatty acids and sodium acetate for growth, and its conidia were unable to germinate on minimal medium supplemented with sodium oleate. In addition, the trap formation was retarded in the ?AoMls mutants, which only produced immature traps containing one or two rings. Moreover, the nematicidal activity of the ?AoMls mutants was significantly decreased. Our results suggest that the gene AoMls plays an important role in conidiation, trap formation and pathogenicity of A. oligospora. PMID:24323290

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

    PubMed Central

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

    2014-01-01

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

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

    NASA Technical Reports Server (NTRS)

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

    1982-01-01

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

  15. First ground-based astrometric observations of Puck by AO system. The new figure of its orbit

    NASA Astrophysics Data System (ADS)

    Descamps, P.; Marchis, F.; Berthier, J.; Prange, R.; Leguyader, C.

    2000-10-01

    We have conducted a campaign of observations in May and October 1999 of the Uranian system wit the ADONIS AO system mounted on the ESO 3.6m telescope.Among other satellites of Uranus, Puck, the outermost one of the satellites discovered by Voyager 2 in July 1986 is detected on all our images. The correction of atmospheric turbulence by the AO system is stable and provides a satisfactory signal to noise ratio. In order to improve the accuracy of the satellite position determination (up to 30 mas), we had defined a Moffat-Gauss function. We determine the orbital parameters by a least square fit method and we discuss possible interpretations. Data presented here are based on observations collected at the European Southern Observatory, Chile (proposal: 66.C-0707).

  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. Ensemble Transform Kalman Filter, a nonstationary control law for complex AO systems on ELTs: theoretical aspects and first simulations results

    NASA Astrophysics Data System (ADS)

    Gray, M.; Le Roux, B.

    2012-07-01

    Optimal control laws for new Adaptive Optics (AO) concepts in astronomy require the implementation of techniques intended for real time identification of the atmospheric turbulence. Contrary to the Optimized Modal Gain Integrator (OMGI), it has been proved that the Kalman Filter (KF) based optimal control law enables estimation and prediction of the turbulent phase from the measurements and corrects efficiently the different modes of this phase in the case of a wide field tomographic AO system. But using such kind of processes, for any Extremely Large Telescope (ELT), will be extremely difficult because of the numerical complexity of the computations involved in the matrices calculations as well as the recording of large covariance matrices. A new control law is proposed, based on the Ensemble Transform Kalman Filter (ETKF) and its efficient variation, Local ETKF (recently developed for geophysics applications), allowing to dramatically reduce the computation burden for an ELT implementation and also to deal with non stationary behaviors of the turbulence.

  18. Relativistic blast-wave model for the rapid flux variations of AO 0235+164 and other compact radio sources

    NASA Technical Reports Server (NTRS)

    Marscher, A. P.

    1978-01-01

    A relativistic blast-wave version of a signal-screen model is developed which can adequately explain the details of the flux-density and structural variations of compact extragalactic radio sources. The relativistic motion implied by flux variations is analyzed with respect to the synchrotron spectrum of the BL Lac object AO 0235+164 observed during outbursts, and a signal-screen model for rapidly expanding shells produced by ultrarelativistic blast waves is examined. The approximate observed structure of the blast wave at three stages in its evolution is illustrated, each stage is described, and the model is applied to the flux density outburst in AO 0235+164 observed in late 1975. The results show that a relativistic blast-wave model can in general reproduce the main features of the observed flux variations in compact sources. Some problems with the proposed model are briefly discussed.

  19. LDEF (Postflight), AO054 : Space Plasma High-Voltage Drainage Experiment, Tray D10

    NASA Technical Reports Server (NTRS)

    1990-01-01

    LDEF (Postflight), AO054 : Space Plasma High-Voltage Drainage Experiment, Tray D10 The postflight photograph was taken in the SAEF II at KSC prior to removal of the experiment from the LDEF. The experiment trays upper, lower and right flanges have light tan discolorations. The paint dots on clamp blocks located at the centers of the trays upper and right flanges and at the left end of the lower flange have changed from their original white color to a light tan. The SP HVD experiment consist of two identical sets of experiment hardware mounted in three (3) inch deep LDEF experiment trays, one tray is located in the LDEF position B04 adjacent to the LDEF trailing edge and the other is located at LDEF position D10 adjacent to the LDEF leading edge. Each set of SP HVD experiment hardware, self-contained within the experiment tray, consist of six (6) fiberglass reinforced epoxy modules carrying charged dielectric samples on top and the power supplies and electronics below. Four (4) dielectric samples, Kapton with Vapor Deposited Aluminum on one side (VDA-Kapton), are bonded to each of the fiberglass modules with a silver filled conductive epoxy. The spaces between the dielectric sample covered modules and between the modules and the tray flanges are covered by strips of VDA-Kapton attached with acrylic transfer adhesive and Kapton tape. Each experiment tray also contain two solar cell modules. Power for the experiment is provided by LiSO2 batteries supplied by the LDEF Project. The experiment was assembled using non-magnetic stainless steel fasteners. The SP HVD experiment in this tray was severely degraded by impingement of atomic oxygen during the long exposure to the space environment. Most of the Kapton polyimide material making up the dielectric samples was completely eroded leaving only the 2000-3000 angstrom Vapor Deposited Aluminum (VDA) layer bonded to the module. The edges of the dielectric surface that survived were taped over by Kapton tape with a silicone adhesive. The Kapton backing eroded leaving the silicone adhesive that protected the Kapton surface beneath. The VDA-Kapton strips used to cover spaces between the modules have degraded substantially and only fragments of the extremely fragile VDA layer remain. The larger fragments of the VDA layer observed in the flight photograph were disturbed during post retrieval operations and became many small aluminum particles. The white paint around the outer edges of the solar cell modules appears to have changed little. Impact craters are visible as black or white specks in many locations on the degraded dielectric surfaces. One of the most noticeable is in the dielectric surface in the upper right corner.

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

    NASA Astrophysics Data System (ADS)

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

    2013-04-01

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

  1. 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

  2. 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´udo compartilhado por um usu´ario ´e valorado ou disseminado pelos seus contatos na rede social [Bigonha et al. 2010 caracterizar a forma como um conte´udo ´e propagado em uma rede de contatos e/ou identificar usu´arios que

  3. Sistemas Distribuidos e Redes de Sensores Aula 6,5...: Outros Padr~oes disseminac~ao e roteamento

    E-print Network

    Rodriguez, Noemi

    Sistemas Distribu´idos e Redes de Sensores Aula 6,5...: Outros Padr~oes ­ dissemina¸c~ao e roteamento abril de 2013 Sistemas Distribu´idos e Redes de Sensores #12;Observa¸c~oes sobre o padr´idos e Redes de Sensores #12;Algoritmo probe/echo Um probe ´e uma mensagem enviada por um n´o para o seu

  4. Algoritmos de Coordenac~ao para Enxames de Rob^os Leandro Soriano Marcolino e Luiz Chaimowicz

    E-print Network

    Chaimowicz, Luiz

    . As soluc¸~oes desenvolvidas foram analisadas e avaliadas atrav´es de #12;simulac¸~oes e experimentos reais. Experimentos reais s~ao muito importantes em rob´otica para mostrar a viabilidade de um algoritmo em cen et al. 2005, Bachmayer and Leonard 2002]. Por´em, como no m´etodo convencional de campos poten- ciais

  5. 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

  6. A Evoluo dos Computadores: do ENIAC ao Siang Wun Song -IME/USP e Universidade Federal do ABC

    E-print Network

    Song, Siang Wun

    A Evolução dos Computadores: do ENIAC ao Jaguar Siang Wun Song - IME/USP e Universidade Federal do ABC setembro de 2010 Siang Wun Song - IME/USP e Universidade Federal do ABCA Evolução dos Computadores.C.) Ábaco romano (1.o século D.C.) Source: Museo Nazionale Romano Siang Wun Song - IME/USP e Universidade

  7. 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

  8. In orbit degradation of EUV optical components in the wavelength range 10-40 nm AO 138-3

    NASA Technical Reports Server (NTRS)

    Delaboudiniere, J. P.; Carabetian, C.; Hochedez, J. F.

    1993-01-01

    A complement of EUV optical components, including mirrors and thin film filters, was flown as part of the Long Duration Exposure Facility (LDEF) AO 138-3. The most original amongst these components were multilayered interference reflectors for the 10-40 nm wavelength range. Very moderate degradation was observed for those components which were exposed to the sun. The degradation is compatible with the deposition of a few nanometers of absorbing material on the surface of the samples.

  9. Lateral fixation of AO type-B2 ankle fractures in the elderly: the Knowles pin versus the plate

    Microsoft Academic Search

    Yih-Shiunn Lee; Hui-Ling Huang; Ting-Ying Lo; Chien-Rae Huang

    2007-01-01

    The study was a retrospective evaluation and comparison. Seventy-five elderly patients (>50 years) with AO type-B2 ankle fractures\\u000a were treated by open reduction and internal fixation. All patients were followed up retrospectively for at least 12 months.\\u000a The 75 patients were divided into two groups, based on the method of treatment. The Knowles pin (KP) group included 45 patients\\u000a with an average

  10. CAMPUS DE CURITIBANOS PROGRAMAO PARA A RECEPO AOS CALOUROS 2014/2 DO CAMPUS DE CURITIBANOS DA

    E-print Network

    Floeter, Sergio Ricardo

    , Engenharia Florestal e Medicina Veterinária. 09h15min/Auditório Apresentação dos serviços disponíveis Atendimento Docente (PAADo); Biblioteca Setorial de Curitibanos; Tecnologia da Informação; e Restaurante aos calouros deste curso. 15h00min/CRC303 Apresentação específica do Curso de Graduação em Medicina

  11. Projet de Note aux Comptes Rendus (17 ao^ut 2012) A Cramer-Rao inequality for non differentiable

    E-print Network

    Coudière, Yves

    Projet de Note aux Comptes Rendus (17 ao^ut 2012) A Cram´er-Rao inequality for non differentiable of the bound is related to the original Cram´er-Rao bound, although it does not require the differentiability of the model. Moreover, we show our efficiency bound to be always greater than the Cram´er-Rao bound in smooth

  12. Laboratory Results and Status Update for Pathfinder at LBT, The LINC-NIRVANA NGS Ground- Layer AO Subsystem

    E-print Network

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

    2014-01-01

    The full LINC-NIRVANA instrument will be one of the most complex ground-based astronomical systems ever built. It will consist of multiple subsystems, including two multi-conjugate ground layer AO systems (MCAO) that drive the LBT adaptive secondaries, two mid-high layer AO systems with their own Xynetics 349 actuator DM's , a fringe tracker, a beam combiner, and the NIR science camera. In order to mitigate risk, we take a modular approach to instrument testing and commissioning by decoupling these subsystems individually. The first subsystem tested on-sky will be one of the ground-layer AO systems, part of a test-bed known as the Pathfinder. The Pathfinder consists of a 12-star pyramid wavefront sensor (PWFS) that drives one of the LBT's adaptive secondaries, a support structure known as "The Foot," and the infrared test camera (IRTC), which is used for acquisition and alignment. The 12 natural guide stars are acquired by moveable arms called "star enlargers," each of which contains its own optical path. The...

  13. Open-loop control of SCExAO's MEMS deformable mirror using the Fast Iterative Algorithm: speckle control performances

    NASA Astrophysics Data System (ADS)

    Blain, Célia; Guyon, Olivier; Martinache, Frantz; Bradley, Colin; Clergeon, Christophe

    2012-07-01

    Micro-Electro-Mechanical Systems (MEMS) deformable mirrors (DMs) are widely utilized in astronomical Adaptive Optics (AO) instrumentation. High precision open-loop control of MEMS DMs has been achieved by developing a high accuracy DM model, the Fast Iterative Algorithm (FIA), a physics-based model allowing precise control of the DM shape. Accurate open-loop control is particularly critical for the wavefront control of High- Contrast Imaging (HCI) instruments to create a dark hole area free of most slow and quasi-static speckles which remain the limiting factor for direct detection and imaging of exoplanets. The Subaru Coronagraphic Extreme Adaptive Optics (SCExAO) system is one of these high contrast imaging instruments and uses a 1024-actuator MEMS deformable mirror (DM) both in closed-loop and open-loop. The DM is used to modulate speckles in order to distinguish (i) speckles due to static and slow-varying residual aberrations from (ii) speckles due to genuine structures, such as exoplanets. The FIA has been fully integrated into the SCExAO wavefront control software and we report the FIA’s performance for the control of speckles in the focal plane.

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

    SciTech Connect

    Wu, Y.-L.; Close, L. M.; Males, J. R.; Follette, K.; Morzinski, K.; Kopon, D.; Rodigas, T. J.; Hinz, P. [Steward Observatory, University of Arizona, Tucson, AZ 85721 (United States); Puglisi, A.; Esposito, S.; Pinna, E.; Riccardi, A.; Xompero, M.; Briguglio, R., E-mail: yalinwu@email.arizona.edu [INAF-Osservatorio Astrofisico di Arcetri, Largo E. Fermi 5, I-50125 Firenze (Italy)

    2013-09-01

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

  15. 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

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

    NASA Astrophysics Data System (ADS)

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

    2013-12-01

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

  17. 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

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

    NASA Technical Reports Server (NTRS)

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

    2005-01-01

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

  19. Instituto de Ci^encias Exatas, Universidade de Brasilia Departamento de Ci^encia da Computac~ao

    E-print Network

    Ayala-Rincón, Mauricio

    acordo com as seguintes regras: i. A raiz da ´arvore ´e marcada com o ´indice da primeira entrada do A vai realizar as compara¸c~oes indicadas ao longo de um caminho iniciando na raiz de sua ´arvore de¸c~oes realizadas no pior caso ´e o n´umero p de n´os do caminho mais longo da raiz at´e uma folha. Suponha que

  20. Optimal Sensor Arrangements in Angle of Arrival (AoA) and Range Based Localization with Linear Sensor Arrays

    PubMed Central

    Herath, Sanvidha C. K.; Pathirana, Pubudu N.

    2013-01-01

    This paper investigates the linear separation requirements for Angle-of-Arrival (AoA) and range sensors, in order to achieve the optimal performance in estimating the position of a target from multiple and typically noisy sensor measurements. We analyse the sensor-target geometry in terms of the Cramer–Rao inequality and the corresponding Fisher information matrix, in order to characterize localization performance with respect to the linear spatial distribution of sensors. Here in this paper, we consider both fixed and adjustable linear sensor arrays. PMID:24036585

  1. Early Tibiotalocalcaneal Arthrodesis Intramedullary Nail for Treatment of a Complex Tibial Pilon Fracture (AO/OTA 43-C).

    PubMed

    Hsu, Andrew R; Szatkowski, Jan P

    2014-08-24

    Management of severely comminuted, complete articular tibial pilon fractures (AO/OTA 43-C) remains a challenge, with few treatment options providing good clinical outcomes. Open reduction and internal fixation of the tibial plafond, tibiotalar arthrodesis, and salvage hindfoot reconstruction procedures are all associated with surgical complications and functional limitations. In this report, we present a case of a complex pilon fracture in a patient with multiple medical comorbidities and socioeconomic disadvantages that was successfully and acutely treated with a retrograde tibiotalocalcaneal hindfoot arthrodesis nail. At final follow-up examination, the patient had decreased pain, a stable plantigrade foot, and could ambulate with normal shoes without any assistive devices. PMID:25156100

  2. 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

  3. 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.

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

    PubMed

    Wu, Xiao; Zhu, Jun

    2015-03-21

    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

  5. The Triaxial Ellipsoid Diameters and Rotational Pole of Asteroid (9) Metis from AO at Gemini and Keck

    NASA Astrophysics Data System (ADS)

    Drummond, Jack D.; Merline, W. J.; Conrad, A.; Dumas, C.; Tamblyn, P.; Christou, J.; Carry, B.; Chapman, C.

    2012-10-01

    From Adaptive Optics (AO) images of (9) Metis at 14 epochs over 2008 December 8 and 9 at Gemini North, triaxial ellipsoid diameters of 218x175x112 km are derived with fitting uncertainties of 3x3x47 km. However, by including just two more AO images from Keck-II in June and August of 2003 in a global fit, the fitting uncertainty of the small axis drops by more than a third because of the lower sub-Earth latitude afforded in 2003 (-28°) compared to 2008 (+47°), and the triaxial ellipsoid diameters become 218x175x129 km with fitting uncertainties of 3x3x14 km. We have estimated the systematic uncertainty of our method to be 4.1, 2.7, and 3.8%, respectively, for the three diameters. These values were recently derived (Drummond et al., in prep) from a comparison of KOALA (Carry et al, Planetary and Space Science 66, 200-212) and our triaxial ellipsoid analysis of four asteroids. Quadratically adding this systematic error with the fitting error, the total uncertainty for Metis becomes 9x5x15 km. Concurrently, we find an EQJ2000 rotational pole at [RA; Dec]=[185° +19°] or in ecliptic coordinates, [? ; ? ]=[176° +20°] (ECJ2000).

  6. A new polymer-based laccase for decolorization of AO7: long-term storage and mediator reuse.

    PubMed

    Zhang, Xiaolin; Pan, Bingcai; Wu, Bing; Zhang, Weiming; Lv, Lu

    2014-07-01

    To address the bottlenecks of laccase-based catalysis, i.e., poor long-term stability and potential secondary pollution caused by synthetic mediator, we fabricated a new biocatalyst (N-PS-Lac) through adsorption of laccase onto polystyrene anion exchangers (N-PS) binding quaternary ammonium groups. After 2-year storage, the residual activity of N-PS-Lac remained as high as 101.7%, while that for native laccase was only 14.6%. Also, N-PS-Lac exhibited improved durability against pH variation and thermal treatment at 60°C. Gaussian curve fitting of FT-IR spectra indicated that laccase conformation of N-PS-Lac was rigidified, possibly because of the host geometric restriction and the host-laccase electrostatic attraction. A two-step method, i.e., adsorption of an azo dye AO7 by N-PS and then ectopic degradation by the immobilized laccase, was proposed to reuse the mediator HOBT for seven cyclic runs, where N-PS-Lac kept the constant decolorization efficiency. AO7 solution was detoxified completely after decolorization by the two-step method. PMID:24862000

  7. Use of a single 2.0-mm locking AO reconstruction titanium plate in linear, non-comminuted, mandible fractures

    PubMed Central

    Parmar, Babu S.; Makwana, Kalpesh G.; Patel, Aditi M.; Tandel, Ramanuj C.; Shah, Jay

    2014-01-01

    Purpose: The aim of the following study is to prospectively evaluate the use of a single Arbeitsgemeinschaft für Osteosynthesefragen (AO) 2.0-mm locking reconstruction plate for linear non-comminuted mandibular fractures without the use of a second plate. Materials and Methods: This study consisted of a sample of 10 patients who reported to the department with fractures of the mandible and were treated over a period of 24 months from November 2010 to November 2012. Out of these, there were 8 male patients and 2 female patients. There were four cases of isolated parasymphysis fractures, 1 of the case had a parasymphysis fracture associated with subcondylar fracture, 4 had a body fracture and 2 had a symphysis fracture. Results: All patients had satisfactory fracture reduction and a successful treatment outcome without major complications. Only one patient (10%) developed minor complications. Conclusion: The study has demonstrated that treating linear non-comminuted mandibular fractures with a single AO 2.0-mm locking reconstruction plate provides excellent stability at the fracture site which in turn leads to sound bone healing and early functional rehabilitation. PMID:24987599

  8. H-alpha as a Probe of Very Low-mass Planets: The GAPplanetS Survey With the MagAO System

    NASA Astrophysics Data System (ADS)

    Close, L.; MagAO Team

    2014-03-01

    We utilized the new high-order 585 actuator Magellan Adaptive Optics system (MagAO) to obtain very high-resolution visible light images of young Transitional Disk with MagAO's VisAO science camera. In the median seeing conditions of the 6.5m Magellan telescope (0.5 - 0.7''), we find MagAO delivers 24-19% Strehl at Ha (0.656 mm). We detect a faint companion embedded in this young transitional disk system at just 86.3±1.9 mas (~12 AU) from the star. The companion is detected in both Ha and a continuum filter (Dmag=6.33±0.20 mag at Ha and 7.50±0.25 mag in the continuum filter). The Ha emission from the ~0.25 solar mass companion (EW=180 Angstroms) implies a mass accretion rate of ~5.9x10-10 Msun/yr, and a total accretion luminosity of 1.2% Lsun. Assuming a similar accretion rate, we estimate that a 1 Jupiter mass gas giant could have considerably better (50-1,000x) planet/star contrasts at Ha than at H band (COND models) for a range of optical extinctions (3.4-0 mag). We suggest that ~0.5-5 Mjup extrasolar planets in their gas accretion phase could be much more luminous at Ha than in the NIR. This is the motivation for our new MagAO GAPplanetS survey for directly imaging lowmass exoplanets in the gaps of transitional disks in the light of H-alpha with MagAO's unique SDI AO camera.

  9. ROSAT guest investigator program (AO-1). On a search for coronal X ray emissions from white dwarfs

    NASA Astrophysics Data System (ADS)

    Musielak, Z. E.

    1992-03-01

    We have suggested that cool magnetic white dwarfs may be sources of X-ray coronal emission and proposed several prominent candidates for this emission. One of these candidates (EG 250) was approved for the C-category observation by the National and International Committee and was observed by ROSAT on April 17, 1991. Unfortunately, the granted exposure time (1071 s) was much shorter than that which was required by theoretical predictions to observe coronal X-ray emission from this object. The tape containing the data was send to us in November 1991. Since then we have analyzed the data visiting the ROSAT Science Center at NASA Goddard Space Flight Center. The analysis of the data taken during this short observation show, as expected, no X-rays. It is our hope that EG 250 will be observed again during the AO-2 phase of pointed observations, as 10,000 s of observing time was granted to V. Trimble for the C-category observation of this star. We have a close contact with Dr. Trimble regarding this matter. Because our all targets (GD 90, KUV 2316-123 and GD 356) proposed for the observation during the AO-2 phase of pointed observations have been approved by the National and International Committee, we have installed the required software at NASA/MSFC to be able to carry out the data analysis in Huntsville. Two of our targets have already been observed (KUV 2316-123 was observed on Dec. 3, 1991 with 10,000 s of the exposure time, and GD 356 was observed on Jan 4, 1992 with 5,000 s of the exposure time). We just received the data and will begin the analysis soon. The results of our analysis will be reported to the scientific community by publishing papers in the Astrophysical Journal Letters. Our intention is to submit a paper when the analysis of the data taken during AO2 is completed. The data taken during the observation of EG 250 will be a part of this paper.

  10. A Survey of the High Order Multiplicity of Nearby Solar-type Binary Stars with Robo-AO

    NASA Astrophysics Data System (ADS)

    Riddle, Reed L.; Tokovinin, Andrei; Mason, Brian D.; Hartkopf, William I.; Roberts, Lewis C., Jr.; Baranec, Christoph; Law, Nicholas M.; Bui, Khanh; Burse, Mahesh P.; Das, H. K.; Dekany, Richard G.; Kulkarni, Shrinivas; Punnadi, Sujit; Ramaprakash, A. N.; Tendulkar, Shriharsh P.

    2015-01-01

    We conducted a survey of nearby binary systems composed of main sequence stars of spectral types F and G in order to improve our understanding of the hierarchical nature of multiple star systems. Using Robo-AO, the first robotic adaptive optics instrument, we collected high angular resolution images with deep and well-defined detection limits in the Sloan Digital Sky Survey i' band. A total of 695 components belonging to 595 systems were observed. We prioritized observations of faint secondary components with separations over 10'' to quantify the still poorly constrained frequency of their subsystems. Of the 214 secondaries observed, 39 contain such subsystems; 19 of those were discovered with Robo-AO. The selection-corrected frequency of secondary subsystems with periods from 103.5 to 105 days is 0.12 ± 0.03, the same as the frequency of such companions to the primary. Half of the secondary pairs belong to quadruple systems where the primary is also a close pair, showing that the presence of subsystems in both components of the outer binary is correlated. The relatively large abundance of 2+2 quadruple systems is a new finding, and will require more exploration of the formation mechanism of multiple star systems. We also targeted close binaries with periods less than 100 yr, searching for their distant tertiary components, and discovered 17 certain and 2 potential new triples. In a subsample of 241 close binaries, 71 have additional outer companions. The overall frequency of tertiary components is not enhanced, compared to all (non-binary) targets, but in the range of outer periods from 106 to 107.5 days (separations on the order of 500 AU), the frequency of tertiary components is 0.16 ± 0.03, exceeding the frequency of similar systems among all targets (0.09) by almost a factor of two. Measurements of binary stars with Robo-AO allowed us to compute first orbits for 9 pairs and to improve orbits of another 11 pairs.

  11. Equipamentos interativos: uma contribui»c~ao dos centros e museus de ci^encias contempor^aneos para a educa»c~ao cient¶‡flca formal (Interactive equipments: a contribution of contemporary centers and museums of science for the formal scientiflc education)

    Microsoft Academic Search

    Maura Ventura Chinelli; Grazielle Rodrigues Pereira; Luiz Edmundo; Vargas de Aguiar

    Este artigo descreve um processo de pesquisa que buscou encontrar, nos centros e museus de ci^encias, con- tribui»c~oes para a educa»c~ao cient¶‡flca formal. Foi realizado na forma de pesquisa-a»c~ao com a participa»c~ao, como pesquisadores, de 10 (dez) estudantes de cursos de Licenciatura (em f¶‡sica, qu¶‡mica e matematica) que procu- raram identiflcar, nos equipamentos interativos dispon¶‡veis nesses espa»cos, aqueles que permitissem

  12. An in-vitro biomechanical comparison of the Orosco and AO locking plates for anterior cervical spine fixation.

    PubMed

    Smith, S A; Lindsey, R W; Doherty, B J; Alexander, J; Dickson, J H

    1995-06-01

    The Orosco anterior cervical spine plate (H-plate) and the Morscher AO cervical locking plate (CSLP) were studied to determine their comparative in vitro mechanical properties in flexion. Human cadaver cervical spines were tested nondestructively in flexion as intact, destabilized, and stabilized specimens with both implants. Stabilized specimens were also subjected to a large angular displacement in an attempt to induce implant failure. Differences between intact, destabilized, and stabilized specimens were significant for both the CSLP and H-plate groups in flexion testing (p < 0.05). Large angular displacement testing resulted in plate/screw displacement with the H-plate but not with the CSLP. Small angular displacements in flexion was tolerated well by both implants, but only the CSLP maintained stability with large angular displacements. PMID:7670213

  13. Final performance and lesson-learned of SAXO, the VLT-SPHERE extreme AO: from early design to on-sky results

    NASA Astrophysics Data System (ADS)

    Fusco, T.; Sauvage, J.-F.; Petit, C.; Costille, A.; Dohlen, K.; Mouillet, D.; Beuzit, J.-L.; Kasper, M.; Suarez, M.; Soenke, C.; Fedrigo, E.; Downing, M.; Baudoz, P.; Sevin, A.; Perret, D.; Barrufolo, A.; Salasnich, B.; Puget, P.; Feautrier, F.; Rochat, S.; Moulin, T.; Deboulbé, A.; Hugot, E.; Vigan, A.; Mawet, D.; Girard, J.; Hubin, N.

    2014-08-01

    The extreme AO system, SAXO (SPHERE AO for eXoplanet Observation), is the heart of the SPHERE system, feeding the scientific instruments with flat wave front corrected from all the atmospheric turbulence and internal defects. We will present the final performance of SAXO obtained during the instrument AIT in Europe as well as the very first on-sky results. The main requirements and system characteristics will be recalled and the full AO loop performance will be quantified and compared to original specifications. It will be demonstrated that SAXO meets or even exceeds (especially its limit magnitude and its jitter residuals) its challenging requirements (more than 90% of SR in H band and a 3 mas residual jitter). Finally, after 10 years of AO developments, from early design to final on-sky implementations, some critical system aspects as well as some important lesson-learned will be presented in the perspective of the future generation of complex AO systems for VLTs and ELTs.

  14. 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.

  15. LDEF (Postflight), AO178 : A High-Resolution Study of Ultra-heavy Cosmic-Ray Nuclei, Tray C06

    NASA Technical Reports Server (NTRS)

    1990-01-01

    LDEF (Postflight), AO178 : A High-Resolution Study of Ultra-heavy Cosmic-Ray Nuclei, Tray C06 EL-1994-00206 LDEF (Postflight), AO178 : A High-Resolution Study of Ultra-heavy Cosmic-Ray Nuclei, Tray C06 The postflight photograph of the Ultra Heavy Cosmic Ray Experiment (UHCRE) was taken in SAEF II at KSC after removal of the experiment tray from the LDEF. The experiment tray flanges appear discolored by a light brown stain. Outlines of experiment tray clamp blocks are clearly visible on the lower tray flanges.The experiment tray holding fixture hardware covers the clamp block areas on the end flanges. The UHCRE detectors were contained in 16 peripheral LDEF trays with at least one UHCRE tray located on each row of the LDEF except row 3, row 9 and row 12. Each tray contains three cylindrical aluminum pressure vessels with an integral aluminum support structure. Each cylinder is filled with an Eccofoam insert that houses 4 UHCRE detector stacks. Each stack consist of layers of Lexan polycarbonate sheets (approximately 70) interleaved with several thin sheets of lead. Forty-seven of the 48 pressure vessels were pressurized to 1.0 bar of a dry gas mixture (oxygen, nitrogen and helium) and sealed. One of the units was left unsealed in order to investigate the effects of the vacuum environment on the detector materials. Thermal control was accomplished by attaching an aluminized Kapton thermal cover on the tray bottom (the Kapton facing the LDEF interior), placing the aluminum cylinder support structure on thermal isolators and covering the experiment with a thin (5 mil) silvered TEFLON® thermal cover. The silvered TEFLON® cover was supported by an aluminum frame, an integral part of the experiment structure, and held in place by Velcro pads selectively located on the frame and on the back of the cover. The copper colored strip extending over the trays upper flange is a copper coated pressure sensitive tape used to provide an electrical ground between the experiments thermal cover and the LDEF structure. The UHCRE thermal cover appears to be specular and intact with no apparent damage. The greenish colors on the left one third of the thermal cover are reflections from the surroundings. The ground strap appears to be in place with no visible damage but appears to be a deeper copper color than in the prelaunch photograph..

  16. LDEF (Postflight), AO178 : A High-Resolution Study of Ultra-heavy Cosmic-Ray Nuclei, Tray C05

    NASA Technical Reports Server (NTRS)

    1990-01-01

    LDEF (Postflight), AO178 : A High-Resolution Study of Ultra-heavy Cosmic-Ray Nuclei, Tray C05 EL-1994-00205 LDEF (Postflight), AO178 : A High-Resolution Study of Ultra-heavy Cosmic-Ray Nuclei, Tray C05 The postflight photograph of the Ultra Heavy Cosmic Ray Experiment (UHCRE) was taken in SAEF II at KSC after removal of the experiment tray from the LDEF. The experiment tray flanges appear discolored by a brown stain that provides outlines of the experiment tray clamp blocks that are clearly visible on the upper and lower tray flanges.The experiment tray holding fixture hardware covers the clamp block areas on the end flanges. The UHCRE detectors were contained in 16 peripheral LDEF trays with at least one UHCRE tray located on each row of the LDEF except row 3, row 9 and row 12. Each tray contains three cylindrical aluminum pressure vessels with an integral aluminum support structure. Each cylinder is filled with an Eccofoam insert that houses 4 UHCRE detector stacks. Each stack consist of layers of Lexan polycarbonate sheets (approximately 70) interleaved with several thin sheets of lead. Forty-seven of the 48 pressure vessels were pressurized to 1.0 bar of a dry gas mixture (oxygen, nitrogen and helium) and sealed. One of the units was left unsealed in order to investigate the effects of the vacuum environment on the detector materials. Thermal control was accomplished by attaching an aluminized Kapton thermal cover on the tray bottom (the Kapton facing the LDEF interior), placing the aluminum cylinder support structure on thermal isolators and covering the experiment with a thin (5 mil) silvered TEFLON® thermal cover. The silvered TEFLON® cover was supported by an aluminum frame, an integral part of the experiment structure, and held in place by Velcro pads selectively located on the frame and on the back of the cover. The copper colored strip extending over the trays lower flange is a copper coated pressure sensitive tape used to provide an electrical ground between the experiments thermal cover and the LDEF structure. The UHCRE thermal cover appears to be specular and intact with no apparent damage. The cover appears less taut than in the flight photograph and the locations of Velcro attach pads are less prominent. The greenish colors on the left one third of the thermal cover are reflections from the surroundings. The scallop effect around the cover edges occurs between the cover attach points and shows the upper edge of the support frame. The ground strap appears to be in place with no visible damage but appears to be a deeper copper color than in the prelaunch photograph..

  17. LDEF (Postflight), AO178 : A High-Resolution Study of Ultra-heavy Cosmic-Ray Nuclei, Tray A10

    NASA Technical Reports Server (NTRS)

    1990-01-01

    LDEF (Postflight), AO178 : A High-Resolution Study of Ultra-heavy Cosmic-Ray Nuclei, Tray A10 EL-1994-00122 LDEF (Postflight), AO178 : A High-Resolution Study of Ultra-heavy Cosmic-Ray Nuclei, Tray A10 The postflight photograph of the Ultra Heavy Cosmic Ray Experiment (UHCRE) was taken in the Orbiter Processing Facility (OPF) at KSC during removal of the LDEF from the Orbiters cargo bay. The UHCRE detectors were contained in 16 peripheral LDEF trays with at least one UHCRE tray located on each row of the LDEF except row 3, row 9 and row 12. Each tray contains three cylindrical aluminum pressure vessels with an integral aluminum support structure. Each cylinder is filled with an Eccofoam insert that houses 4 UHCRE detector stacks. Each stack consist of layers of Lexan polycarbonate sheets (approximately 70) interleaved with several thin sheets of lead. Forty-seven of the 48 pressure vessels were pressurized to 1.0 bar of a dry gas mixture (oxygen, nitrogen and helium) and sealed. One of the units was left unsealed in order to investigate the effects of the vacuum environment on the detector materials. Thermal control was accomplished by attaching an aluminized Kapton thermal cover on the tray bottom (the Kapton facing the LDEF interior), placing the aluminum cylinder support structure on thermal isolators and covering the experiment with a thin (5 mil) silvered TEFLON® thermal cover. The silvered TEFLON® cover was supported by an aluminum frame, an integral part of the experiment structure, and held in place by Velcro pads selectively located on the frame and on the back of the cover. The copper colored strip extending over the trays upper flange is a copper coated pressure sensitive tape used to provide an electrical ground between the experiments thermal cover and the LDEF structure. The UHCRE thermal covers surface appears to have changed from specular to opaque (glossy white) with many black dots of various sizes that appear to be impact craters. An impact crater with a large area of discoloration is clearly visible in the upper right quadrant of the thermal cover. The dark discoloration is probably the results of an impact penetration of the 5 mil TEFLON® film allowing atomic oxygen to oxidize and erode the vapor deposited silver layer beneath. White dots of varying sizes can be seen on the cover, many appear to be encircling impact craters. The cover is not stretched as taut as in the flight photograph and locations of Velcro attach pads are not as prominent. The ground strap appears to be in place with no visible damage but appears to be a deeper copper color.

  18. LDEF (Postflight), AO178 : A High-Resolution Study of Ultra-heavy Cosmic-Ray Nuclei, Tray A04

    NASA Technical Reports Server (NTRS)

    1990-01-01

    LDEF (Postflight), AO178 : A High-Resolution Study of Ultra-heavy Cosmic-Ray Nuclei, Tray A04 EL-1994-00272 LDEF (Postflight), AO178 : A High-Resolution Study of Ultra-heavy Cosmic-Ray Nuclei, Tray A04 The postflight photograph of the Ultra Heavy Cosmic Ray Experiment (UHCRE) was taken in SAEF II at KSC after the experiment tray was removed from the LDEF and the silvered TEFLON® thermal cover removed. The UHCRE detectors were contained in 16 peripheral LDEF trays with at least one UHCRE tray located on each row of the LDEF except row 3, row 9 and row 12. Each tray contains three cylindrical aluminum pressure vessels with an integral aluminum support structure. Each cylinder is filled with an Eccofoam insert that houses 4 UHCRE detector stacks. Each stack consist of layers of Lexan polycarbonate sheets (approximately 70) interleaved with several thin sheets of lead. Forty-seven of the 48 pressure vessels were pressurized to 1.0 bar of a dry gas mixture (oxygen, nitrogen and helium) and sealed. One of the units was left unsealed in order to investigate the effects of the vacuum environment on the detector materials. Thermal control was accomplished by attaching an aluminized Kapton thermal cover on the tray bottom (the Kapton facing the LDEF interior), placing the aluminum cylinder support structure on thermal isolators and covering the experiment with a thin (5 mil) silvered TEFLON® thermal cover. The silvered TEFLON® cover was supported by an aluminum frame, an integral part of the experiment structure, and held in place by Velcro pads selectively located on the frame and on the back of the cover. A copper coated pressure sensitive tape was used to provide an electrical ground strap between the thermal cover and the LDEF structure. All experiment hardware appears to be in prelaunch condition and securely in place. The three cylindrical pressure vessels containing the experiment detectors are shown mounted in the experiment tray with the frame for mounting the thermal cover in the foreground. The white rectangles on the frame are Velcro pads bonded to the frame for attaching the thermal cover and appear in excellent condition. The top half of the cylinders and the thermal cover frame were painted black to meet thermal control requirements.

  19. LDEF (Postflight), AO178 : A High-Resolution Study of Ultra-heavy Cosmic-Ray Nuclei, Tray E10

    NASA Technical Reports Server (NTRS)

    1990-01-01

    LDEF (Postflight), AO178 : A High-Resolution Study of Ultra-heavy Cosmic-Ray Nuclei, Tray E10 EL-1994-00162 LDEF (Postflight), AO178 : A High-Resolution Study of Ultra-heavy Cosmic-Ray Nuclei, Tray E10 The postflight photograph of the Ultra Heavy Cosmic Ray Experiment (UHCRE) was taken in the Orbiter Processing Facility during removal of the LDEF from the Orbiter's payload bay. The UHCRE detectors were contained in 16 peripheral LDEF trays with at least one UHCRE tray located on each row of the LDEF except row 3, row 9 and row 12. Each tray contains three cylindrical aluminum pressure vessels with an integral aluminum support structure. Each cylinder is filled with an Eccofoam insert that houses 4 UHCRE detector stacks. Each stack consist of layers of Lexan polycarbonate sheets (approximately 70) interleaved with several thin sheets of lead. Forty-seven of the 48 pressure vessels were pressurized to 1.0 bar of a dry gas mixture (oxygen, nitrogen and helium) and sealed. One of the units was left unsealed in order to investigate the effects of the vacuum environment on the detector materials. Thermal control was accomplished by attaching an aluminized Kapton thermal cover on the tray bottom (the Kapton facing the LDEF interior), placing the aluminum cylinder support structure on thermal isolators and covering the experiment with a thin (5 mil) silvered TEFLON® thermal cover. The silvered TEFLON® cover was supported by an aluminum frame, an integral part of the experiment structure, and held in place by Velcro pads selectively located on the frame and on the back of the cover. The copper colored strip extending over the trays lower flange is a copper coated pressure sensitive tape used to provide an electrical ground between the experiments thermal cover and the LDEF structure. The UHCRE thermal covers surface appears to have changed from specular to opaque with numerous black dots of various sizes that appear to be impact craters. Many of the craters appear to have a black center encircled by a brown halo. Other circular discolorations also appear on the cover surface. The darker discolorations probably result from an impact that penetrates the 5 mil TEFLON® film and allows atomic oxygen to oxidize and/or erode the vapor deposited silver layer beneath. The cover is taut and the locations of Velcro attach pads are prominent. The pinkish green tint on the thermal cover is caused by the lighting and reflections from the surroundings.The ground strap appears to be intact with no visible damage but appears to be a deeper copper color.

  20. LDEF (Postflight), AO178 : A High-Resolution Study of Ultra-heavy Cosmic-Ray Nuclei, Tray F04

    NASA Technical Reports Server (NTRS)

    1990-01-01

    LDEF (Postflight), AO178 : A High-Resolution Study of Ultra-heavy Cosmic-Ray Nuclei, Tray F04 EL-1994-00171 LDEF (Postflight), AO178 : A High-Resolution Study of Ultra-heavy Cosmic-Ray Nuclei, Tray F04 The postflight photograph was taken in the SAEF II at KSC after the experiment was removed from the LDEF. The UHCRE detectors were contained in 16 peripheral LDEF trays with at least one UHCRE tray located on each row of the LDEF except row 3, row 9 and row 12. Each tray contains three cylindrical aluminum pressure vessels with an integral aluminum support structure. Each cylinder is filled with an Eccofoam insert that houses 4 UHCRE detector stacks. Each stack consist of layers of Lexan polycarbonate sheets (approximately 70) interleaved with several thin sheets of lead. Forty-seven of the 48 pressure vessels were pressurized to 1.0 bar of a dry gas mixture (oxygen, nitrogen and helium) and sealed. One of the units was left unsealed in order to investigate the effects of the vacuum environment on the detector materials. Thermal control was accomplished by attaching an aluminized Kapton thermal cover on the tray bottom (the Kapton facing the LDEF interior), placing the aluminum cylinder support structure on thermal isolators and covering the experiment with a thin (5 mil) silvered TEFLON® thermal cover. The silvered TEFLON® cover was supported by an aluminum frame, an integral part of the experiment structure, and held in place by Velcro pads selectively located on the frame and on the back of the cover. The copper colored strip extending over the trays lower flange is a copper coated pressure sensitive tape used to provide an electrical ground between the experiments thermal cover and the LDEF structure. The UHCRE thermal cover appears to be specular and intact. The circular damaged locations that appeared to to be impact points in the flight photograph are not as apparent in the reflections and is less taut cover. The wrinkled spots on the thermal cover are areas where Velcro pads are bonded to the backside of the cover. The scalloped effect around the cover edges occurs between the cover attach points. The ground strap appears to be in place with no visible damage, but it appears darker.

  1. LDEF (Postflight), AO178 : A High-Resolution Study of Ultra-heavy Cosmic-Ray Nuclei, Tray D05

    NASA Technical Reports Server (NTRS)

    1990-01-01

    LDEF (Postflight), AO178 : A High-Resolution Study of Ultra-heavy Cosmic-Ray Nuclei, Tray D05 EL-1994-00311 LDEF (Postflight), AO178 : A High-Resolution Study of Ultra-heavy Cosmic-Ray Nuclei, Tray D05 The postflight photograph of the Ultra Heavy Cosmic Ray Experiment (UHCRE) was taken in SAEF II at KSC after removal of the experiment tray from the LDEF. The experiment tray flanges appear discolored by a brown stain. Outlines of experiment tray clamp blocks are clearly visible on the upper and lower tray flanges. The experiment tray holding fixture hardware covers the clamp block areas on the end flanges. The UHCRE detectors were contained in 16 peripheral LDEF trays with at least one UHCRE tray located on each row of the LDEF except row 3, row 9 and row 12. Each tray contains three cylindrical aluminum pressure vessels with an integral aluminum support structure. Each cylinder is filled with an Eccofoam insert that houses 4 UHCRE detector stacks. Each stack consist of layers of Lexan polycarbonate sheets (approximately 70) interleaved with several thin sheets of lead. Forty-seven of the 48 pressure vessels were pressurized to 1.0 bar of a dry gas mixture (oxygen, nitrogen and helium) and sealed. One of the units was left unsealed in order to investigate the effects of the vacuum environment on the detector materials. Thermal control was accomplished by attaching an aluminized Kapton thermal cover on the tray bottom (the Kapton facing the LDEF interior), placing the aluminum cylinder support structure on thermal isolators and covering the experiment with a thin (5 mil) silvered TEFLON® thermal cover. The silvered TEFLON® cover was supported by an aluminum frame, an integral part of the experiment structure, and held in place by Velcro pads selectively located on the frame and on the back of the cover. The copper colored strip extending over the trays lower flange is a copper coated pressure sensitive tape used to provide an electrical ground between the experiments thermal cover and the LDEF structure. The UHCRE thermal cover appears specular and intact with no apparent damage. A vertical strip of discoloration, approximately six inches wide and with a grain pattern, extends from top to bottom along the left side of the thermal cover. The cover appears less taut than in the flight photograph and locations of the Velcro attach pads are not as prominent. The ground strap appears to be in place with no visible damage, however, the color appears darked than in the prelaunch photograph.

  2. SRT Evaluation of AIRS Version-6.02 and Version-6.02 AIRS Only (6.02 AO) Products

    NASA Technical Reports Server (NTRS)

    Susskind, Joel; Iredell, Lena; Molnar, Gyula; Blaisdell, John

    2012-01-01

    Version-6 contains a number of significant improvements over Version-5. This report compares Version-6 products resulting from the advances listed below to those from Version-5. 1. Improved methodology to determine skin temperature (T(sub s)) and spectral emissivity (Epsilon(sub v)). 2. Use of Neural-net start-up state. 3. Improvements which decrease the spurious negative Version-5 trend in tropospheric temperatures. 4. Improved QC methodology. Version-6 uses separate QC thresholds optimized for Data Assimilation (QC=0) and Climate applications (QC=0,1) respectively. 5. Channel-by-channel clear-column radiances R-hat(sub tau) QC flags. 6. Improved cloud parameter retrieval algorithm. 7. Improved OLR RTA. Our evaluation compared V6.02 and V6.02 AIRS Only (V6.02 AO) Quality Controlled products with those of Version-5.0. In particular we evaluated surface skin temperature T(sub s), surface spectral emissivity Epsilon(sub v), temperature profile T(p), water vapor profile q(p), OLR, OLR(sub CLR), effective cloud fraction alpha-Epsilon, and cloud cleared radiances R-hat(sub tau) . We conducted two types of evaluations. The first compared results on 7 focus days to collocated ECMWF truth. The seven focus days are: September 6, 2002; January 25, 2003; September 29, 2004; August 5, 2005; February 24, 2007; August 10, 2007; and May 30, 2010. In these evaluations, we show results for T(sub s), Epsilon(sub v), T(p), and q(p) in terms of yields, and RMS differences and biases with regard to ECMWF. We also show yield trends as well as bias trends of these quantities relative to ECMWF truth. We also show yields and accuracy of channel by channel QC d values of R-hat(sub tau) for V6.02 and V6.02 AO. Version-5 did not contain channel by channel QC d values of R-hat(sub tau). In the second type of evaluation, we compared V6.03 monthly mean Level-3 products to those of Version-5.0, for four different months: January, April, July, and October; in 3 different years 2003, 2007, and 2011. In particular, we compared V6.03 and V5.0 trends of T(p), q(p), alpha-Epsilon, OLR, and OLR(sub CLR) computed based on results for these 12 time periods

  3. LDEF (Flight), AO178 : A High-Resolution Study of Ultra-heavy Cosmic-Ray Nuclei, Tray C08

    NASA Technical Reports Server (NTRS)

    1990-01-01

    LDEF (Flight), AO178 : A High-Resolution Study of Ultra-heavy Cosmic-Ray Nuclei, Tray C08 EL-1994-00661 LDEF (Flight), AO178 : A High-Resolution Study of Ultra-heavy Cosmic-Ray Nuclei, Tray C08 The flight photograph of the Ultra Heavy Cosmic Ray Experiment (UHCRE) 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 block of the experiment trays upper flange and the right end of the experiment trays lower flange appear to be slightly discolored. The tray flanges appear to be discolored by a light brown stain and the ground strap located in the center of the lower flange appears intact but a much darker copper color than in the prelaunch photograph. The UHCRE detectors were contained in 16 peripheral LDEF trays with at least one UHCRE tray located on each row of the LDEF except row 3, row 9 and row 12. Each tray contains three cylindrical aluminum pressure vessels with an integral aluminum support structure. Each cylinder is filled with an Eccofoam insert that houses 4 UHCRE detector stacks. Each stack consist of layers of Lexan polycarbonate sheets (approximately 70) interleaved with several thin sheets of lead. Forty-seven of the 48 pressure vessels were pressurized to 1.0 bar of a dry gas mixture (oxygen, nitrogen and helium) and sealed. One of the units was left unsealed in order to investigate the effects of the vacuum environment on the detector materials. Thermal control was accomplished by attaching an aluminized Kapton thermal cover on the tray bottom (the Kapton facing the LDEF interior), placing the aluminum cylinder support structure on thermal isolators and covering the experiment with a thin (5 mil) silvered TEFLON® thermal cover. The silvered TEFLON® cover was supported by an aluminum frame, an integral part of the experiment structure, and held in place by Velcro pads selectively located on the frame and on the back of the cover. The copper colored strip extending over the trays lower flange is a copper coated pressure sensitive tape used to provide an electrical ground between the experiments thermal cover and the LDEF structure. The UHCRE thermal covers surface appears to have changed from specular to opaque (glossy white) marked with many black dots of various sizes that appear to be impact craters. Many of the craters appear to have a black center encircled by a brown halo. The cover appears to be stretched more than in the prelaunch photograph with the locations of Velcro attach pads showing as oblong indentations in the thermal cover.

  4. LDEF (Postflight), AO178 : A High-Resolution Study of Ultra-heavy Cosmic-Ray Nuclei, Tray A02

    NASA Technical Reports Server (NTRS)

    1990-01-01

    LDEF (Postflight), AO178 : A High-Resolution Study of Ultra-heavy Cosmic-Ray Nuclei, Tray A02 EL-1994-00387 LDEF (Postflight), AO178 : A High-Resolution Study of Ultra-heavy Cosmic-Ray Nuclei, Tray A02 The postflight photograph of the Ultra Heavy Cosmic Ray Experiment (UHCRE) was taken in SAEF II at KSC prior to removal of the experiment tray from the LDEF. The white paint dot on the experiment tray clamp blocks located at the center of the trays upper and right flanges and at the left end of the trays lower flange appear to be discolored by a brown stain. The experiment tray flanges also appear to be coated but with a lighter colored stain. The UHCRE detectors were contained in 16 peripheral LDEF trays with at least one UHCRE tray located on each row of the LDEF except row 3, row 9 and row 12. Each tray contains three cylindrical aluminum pressure vessels with an integral aluminum support structure. Each cylinder is filled with an Eccofoam insert that houses 4 UHCRE detector stacks. Each stack consist of layers of Lexan polycarbonate sheets (approximately 70) interleaved with several thin sheets of lead. Forty-seven of the 48 pressure vessels were pressurized to 1.0 bar with a dry gas mixture (oxygen, nitrogen and helium) and sealed. One of the units was left unsealed in order to investigate the effects of the vacuum environment on the detector materials. Thermal control was accomplished by attaching an aluminized Kapton thermal cover on the tray bottom (the Kapton facing the LDEF interior), placing the aluminum cylinder support structure on thermal isolators and covering the experiment with a thin (5 mil) silvered TEFLON® thermal cover. The silvered TEFLON® cover was supported by an aluminum frame, an integral part of the experiment structure, and held in place by Velcro pads selectively located on the frame and on the back of the cover. The copper colored strip extending over the trays lower flange is a copper coated pressure sensitive tape used to provide an electrical ground between the experiments thermal cover and the LDEF structure. The UHCRE thermal cover appears to be specular and intact with no apparent damage. It appears less taut than in the flight photograph. The uniformly located oval spots on the thermal cover are areas where Velcro pads attach the thermal cover to the support frame and appear more visible than in the prelaunch photograph. The scallop effect around the cover edges occurs between the cover attach points and shows the upper edge of the support frame. The ground strap appears to be in place with no visible damage but is a darker color.

  5. LDEF (Postflight), AO178 : A High-Resolution Study of Ultra-heavy Cosmic-Ray Nuclei, Tray E02

    NASA Technical Reports Server (NTRS)

    1990-01-01

    LDEF (Postflight), AO178 : A High-Resolution Study of Ultra-heavy Cosmic-Ray Nuclei, Tray E02 EL-1994-00385 LDEF (Postflight), AO178 : A High-Resolution Study of Ultra-heavy Cosmic-Ray Nuclei, Tray E02 The postflight photograph of the Ultra Heavy Cosmic Ray Experiment (UHCRE) was taken in SAEF II at KSC prior to removal of the experiment tray from the LDEF. The white paint dot on the experiment tray clamp blocks located at the center of the trays lower and left flanges and at the right end of the trays upper flange appear to be discolored by a brown stain. The experiment tray flanges also appear to be coated but with a lighter colored stain. The UHCRE detectors were contained in 16 peripheral LDEF trays with at least one UHCRE tray located on each row of the LDEF except row 3, row 9 and row 12. Each tray contains three cylindrical aluminum pressure vessels with an integral aluminum support structure. Each cylinder is filled with an Eccofoam insert that houses 4 UHCRE detector stacks. Each stack consist of layers of Lexan polycarbonate sheets (approximately 70) interleaved with several thin sheets of lead. Forty-seven of the 48 pressure vessels were pressurized to 1.0 bar of a dry gas mixture (oxygen, nitrogen and helium) and sealed. One of the units was left unsealed in order to investigate the effects of the vacuum environment on the detector materials. Thermal control was accomplished by attaching an aluminized Kapton thermal cover on the tray bottom (the Kapton facing the LDEF interior), placing the aluminum cylinder support structure on thermal isolators and covering the experiment with a thin (5 mil) silvered TEFLON® thermal cover. The silvered TEFLON® cover was supported by an aluminum frame, an integral part of the experiment structure, and held in place by Velcro pads selectively located on the frame and on the back of the cover. The copper colored strip extending over the trays lower flange is a copper coated pressure sensitive tape used to provide an electrical ground between the experiments thermal cover and the LDEF structure. The UHCRE thermal cover appears to be specular and intact with no apparent damage. It appears less taut than in the flight photograph. The uniformly located oval spots on the thermal cover are areas where Velcro pads attach the thermal cover to the support frame and appear more visible than in the prelaunch photograph. The scallop effect around the cover edges occurs between the cover attach points and shows the upper edge of the support frame. The ground strap appears to be in place with no visible damage but is a darker color.

  6. LDEF (Flight), AO178 : A High-Resolution Study of Ultra-heavy Cosmic-Ray Nuclei, Tray A04

    NASA Technical Reports Server (NTRS)

    1990-01-01

    LDEF (Flight), AO178 : A High-Resolution Study of Ultra-heavy Cosmic-Ray Nuclei, Tray A04 EL-1994-00089 LDEF (Flight), AO178 : A High-Resolution Study of Ultra-heavy Cosmic-Ray Nuclei, Tray A04 The flight photograph of the Ultra Heavy Cosmic Ray Experiment (UHCRE) 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 left flange and lower flange appear to be discolored by a dark brown stain. The UHCRE detectors were contained in 16 peripheral LDEF trays with at least one UHCRE tray located on each row of the LDEF except row 3, row 9 and row 12. Each tray contains three cylindrical aluminum pressure vessels with an integral aluminum support structure. Each cylinder is filled with an Eccofoam insert that houses 4 UHCRE detector stacks. Each stack consist of layers of Lexan polycarbonate sheets (approximately 70) interleaved with several thin sheets of lead. Forty-seven of the 48 pressure vessels were pressurized to 1.0 bar of a dry gas mixture (oxygen, nitrogen and helium) and sealed. One of the units was left unsealed in order to investigate the effects of the vacuum environment on the detector materials. Thermal control was accomplished by attaching an aluminized Kapton thermal cover on the tray bottom (the Kapton facing the LDEF interior), placing the aluminum cylinder support structure on thermal isolators and covering the experiment with a thin (5 mil) silvered TEFLON® thermal cover. The silvered TEFLON® cover was supported by an aluminum frame, an integral part of the experiment structure, and held in place by Velcro pads selectively located on the frame and on the back of the cover. The copper colored strip extending over the trays upper flange is a copper coated pressure sensitive tape used to provide an electrical ground between the experiments thermal cover and the LDEF structure. The UHCRE thermal cover appears to be specular and intact with no apparent damage but is more taut than in the prelaunch photograph. The wrinkled spots on the thermal cover are areas where Velcro pads are bonded to the backside of the cover. The scalloped effect around the cover edges occurs between the cover attach points. The ground strap appears to be in place with no visible damage.

  7. LDEF (Postflight), AO178 : A High-Resolution Study of Ultra-heavy Cosmic-Ray Nuclei, Tray A04

    NASA Technical Reports Server (NTRS)

    1990-01-01

    LDEF (Postflight), AO178 : A High-Resolution Study of Ultra-heavy Cosmic-Ray Nuclei, Tray A04 EL-1994-00391 LDEF (Postflight), AO178 : A High-Resolution Study of Ultra-heavy Cosmic-Ray Nuclei, Tray A04 The postflight photograph of the Ultra Heavy Cosmic Ray Experiment (UHCRE) was taken in SAEF II at KSC prior to removal of the experiment tray from the LDEF. The paint dots on the experiment tray clamp blocks, originally white, appearsDE:to be discolored by a brown stain. The experiment tray flanges also appear to be coated but with a lighter colored stain. The UHCRE detectors were contained in 16 peripheral LDEF trays with at leastDE:one UHCRE tray located on each row of the LDEF except row 3, row 9 and row 12. Each tray contains three cylindrical aluminum pressure vessels with an integral aluminum support structure. Each cylinder is filled with an Eccofoam insert that houses 4 UHCRE detector stacks. Each stack consist of layers of Lexan polycarbonate sheets (approximately 70) interleaved with several thin sheets of lead. Forty-seven of the 48 pressure vessels were pressurized to 1.0 bar of a dry gas mixture (oxygen, nitrogen and helium) and sealed. One of the units was left unsealed in order to investigate the effects of the vacuum environment on the detector materials. Thermal control was accomplished by attaching an aluminized Kapton thermal cover on the tray bottom (the Kapton facing the LDEF interior), placing the aluminum cylinder support structure on thermal isolators and covering the experiment with a thin (5 mil) silvered TEFLON® thermal cover. The silvered TEFLON® cover was supported by an aluminum frame, an integral part of the experiment structure, and held in place by Velcro pads selectively located on the frame and on the back of the cover. The copper colored strip extending over the trays lower flange is a copper coated pressure sensitive tape used to provide an electrical ground between the experiments thermal cover and the LDEF structure. The UHCRE thermal cover appears to be specular and intact with no apparent damage. It appears less taut than in the flight photograph. The uniformly located oval spots on the thermal cover are areas where Velcro pads attach the thermal cover to the support frame and appear more visible than in the prelaunch photograph. The scallop effect around the cover edges occurs between the cover attach points and shows the upper edge of the support frame. The ground strap appears to be in place with no visible damage.

  8. LDEF (Postflight), AO178 : A High-Resolution Study of Ultra-heavy Cosmic-Ray Nuclei, Tray B05

    NASA Technical Reports Server (NTRS)

    1990-01-01

    LDEF (Postflight), AO178 : A High-Resolution Study of Ultra-heavy Cosmic-Ray Nuclei, Tray B05 EL-1994-00184 LDEF (Postflight), AO178 : A High-Resolution Study of Ultra-heavy Cosmic-Ray Nuclei, Tray B05 The postflight photograph of the Ultra Heavy Cosmic Ray Experiment (UHCRE) was taken in SAEF II at KSC prior to removal of the experiment tray from the LDEF. The paint dots on the experiment tray clamp blocks, originally white, appears to be discolored by a brown stain. The experiment tray flanges also appear to be coated but with a lighter colored stain. The UHCRE detectors were contained in 16 peripheral LDEF trays with at least one UHCRE tray located on each row of the LDEF except row 3, row 9 and row 12. Each tray contains three cylindrical aluminum pressure vessels with an integral aluminum support structure. Each cylinder is filled with an Eccofoam insert that houses 4 UHCRE detector stacks. Each stack consist of layers of Lexan polycarbonate sheets (approximately 70) interleaved with several thin sheets of lead. Forty-seven of the 48 pressure vessels were pressurized to 1.0 bar of a dry gas mixture (oxygen, nitrogen and helium) and sealed. One of the units was left unsealed in order to investigate the effects of the vacuum environment on the detector materials. Thermal control was accomplished by attaching an aluminized Kapton thermal cover on the tray bottom (the Kapton facing the LDEF interior), placing the aluminum cylinder support structure on thermal isolators and covering the experiment with a thin (5 mil) silvered TEFLON® thermal cover. The silvered TEFLON® cover was supported by an aluminum frame, an integral part of the experiment structure, and held in place by Velcro pads selectively located on the frame and on the back of the cover. The copper colored strip extending over the trays lower flange is a copper coated pressure sensitive tape used to provide an electrical ground between the experiments thermal cover and the LDEF structure. The UHCRE thermal cover appears to be specular and intact with no apparent damage. The cover appears less taut than in the flight photograph and the locations of Velcro attach pads are not as prominent. The scallop effect around the cover edges occurs between the cover attach points and shows the upper edge of the support frame. The ground strap appears to be in place with no visible damage.

  9. Ortonormais Representa c ao

    E-print Network

    Barata, João Carlos Alves

    â?? encia de seqË? uâ?? encias e de continuidade de funâ?º câ? oes em H. 1 David Hilbert (1862--1943). 2 Hâ?? a umCapâ?? �tulo 37 Noâ?º câ? oes Bâ?? asicas Sobre Espaâ?º cos de Hilbert Conteâ?? udo 37.1 Aspectos Topolâ?? ogicos Bâ?? asicos de Espaâ?º cos de Hilbert . . . . . . . . . . . . . . . . . . . . . . 1836 37.2 Aspectos

  10. AO — Organization Chart

    Cancer.gov

    Skip to Content Home | Investigator Resources | Protocol Development | Initiatives/Programs/Collaborations | Links to More Resources | Funding Opportunities | About CTEP Home | Sitemap | Contact CTEP Search this site Administrative Resource Center

  11. Methanol Masers Observations in the 3-mm Bandwidth at the Radio Telescope RT-22 CrAO

    E-print Network

    S. Yu. Zubrin; A. V. Antyufeyev; V. V. Myshenko; V. M. Shulga

    2007-12-10

    We report the beginning of the astronomical masers investigations in the 3-mm bandwidth at the radio telescope RT-22 (CrAO, Ukraine). For this purpose the special complex for maser lines investigation in 85...115 GHz frequency band is developed. It is made on the base of the low noise cryogenic Shottky-diode receiver and the high resolution Fourier-spectrometer. The cryogenic receiver has the DSB noise temperature less than 100K. The spectral channel separation of the Fourier-spectrometer is about 4kHz and the spectrometer bandwidth is 8 MHz. Results of maser observations of 8$^{0}-7^{1} $A$^{+}$ transition of methanol (95.169 GHz) towards DR-21(OH), DR-21W and NGC7538 are in good agreement with early obtained results by other authors. On the basis of the analysis of the location of masers in the NGC7538 direction we can assume that the origin of all known class I methanol masers in this region is connected with existing molecular outflows from young stars.

  12. Intracavity KTP optical parametric oscillator driven by a KLM Nd:GGG laser with a single AO modulator

    NASA Astrophysics Data System (ADS)

    Chu, Hongwei; Zhao, Shengzhi; Yang, Kejian; Zhao, Jia; Li, Yufei; Li, Tao; Li, Guiqiu; Li, Dechun; Qiao, Wenchao

    2015-05-01

    An intracavity KTiOPO4 (KTP) optical parametric oscillator (OPO) pumped by a Kerr lens mode-locking (KLM) Nd:GGG laser near 1062 nm with a single AO modulator was realized for the first time. The mode-locking pulses of the signal wave were obtained with a short duration of subnanosecond and a repetition rate of several kilohertz (kHz). Under a diode pump power of 8.25 W, a maximum output power of 104 mW at signal wavelength near 1569 nm was obtained at a repetition rate of 2 kHz. The highest pulse energy and peak power were estimated to be 80 ?J and 102 kW at a repetition rate of 1 kHz, respectively. The shortest pulse duration was measured to be 749 ps. By considering the Gaussian spatial distribution of the photon density and the Kerr-lens effect in the gain medium, a set of the coupled rate equations for QML intracavity optical parametric oscillator are given and the numerical simulations are basically fitted with the experimental results.

  13. LDEF (Postflight), AO133 : Effect of Space Environment on Space-Based Radar Phased-Array Antenna, Tr

    NASA Technical Reports Server (NTRS)

    1990-01-01

    LDEF (Postflight), AO133 : Effect of Space Environment on Space-Based Radar Phased-Array Antenna, Tray H07 The postflight photograph was taken in the KSC SAEF II facility after the experiment was removed from the LDEF. The Space-Based Radar (SBR) Phased-Array Antenna occupies a six (6) inch deep LDEF end corner tray located on the space end of the LDEF. A light tan discoloration is visible on the left and lower flanges of the experiment tray and also on the unpainted aluminum filler to the left of the passive part of the experiment. A darker stain has discolored the lower corners of the tray structure. The SBR Phased-Array Antenna experiment, consisting of an active part in the upper half of the tray and a passive part located in the lower half of the experiment tray, appears to be intact with no apparent physical damage. The black thermal coating on the active part of the experiment appears to have changed from a flat black to a dark gray while the coating on the passive part of the experiment appears less degraded. The exposed Kapton specimen surfaces in both the active and passive parts of the experiment appear to have changed from specular to diffuse from exposure to the space environment.

  14. LDEF (Postflight), AO133 : Effect of Space Environment on Space-Based Radar Phased-Array Antenna, Tr

    NASA Technical Reports Server (NTRS)

    1990-01-01

    LDEF (Postflight), AO133 : Effect of Space Environment on Space-Based Radar Phased-Array Antenna, Tray H07 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. The Space-Based Radar (SBR) Phased-Array Antenna occupies a six (6) inch deep LDEF end corner tray located on the space end of the LDEF. A light tan discoloration can be seen on the left and lower flanges of the experiment tray and a darker stain has discolored the originally white paint dots on the experiment tray clamp blocks. Dark brown stains on the LDEF structure are vis- ible in areas adjacent to the edge of thermal end panels that were designed to facilitate venting of the LDEF interior. The SBR Phased-Array Antenna experiment, consisting of an active part in the left half of the tray and a passive part located in the right half of the experiment tray, appears to be intact with no apparent physical damage. The black thermal coating on the passive part of the experiment appears unchanged while the black thermal coating on the active part of the experiment appears dark gray. The passive experiment Kapton specimen surfaces appear to have changed from specular to diffuse after exposure to the space environment.

  15. LDEF (Flight), AO133 : Effect of Space Environment on Space-Based Radar Phased-Array Antenna, Tray H

    NASA Technical Reports Server (NTRS)

    1990-01-01

    LDEF (Flight), AO133 : Effect of Space Environment on Space-Based Radar Phased-Array Antenna, Tray H07 The flight photograph was taken from the Orbiter aft flight deck during the LDEF retrieval. The Space-Based Radar (SBR) Phased-Array Antenna occupies a six (6) inch deep LDEF end corner tray located on the space end of the LDEF. A shadow cast by the Orbiter covers most of the right half of the tray containing the active part of the experiment. Even in the shadow, a light tan discoloration can be seen on the left and lower flanges of the experiment tray and a darker stain has discolored the originally white paint dots on the experiment tray clamp blocks. Dark brown stains on the LDEF structure are visible in areas adjacent to the edge of thermal end panels designed to facilitate venting of the LDEF interior. The SBR Phased-Array Antenna experiment, consisting of an active part in the left half of the tray and a passive part located in the right half of the experiment tray, appears to be intact with no apparent physical damage. The black thermal coating on the passive part of the experiment appears unchanged while the black thermal coating on the active part of the experiment appears a dark gray. The passive experiment Kapton specimen surfaces appear to have changed from specular to diffuse when exposed to the space environment.

  16. A spectroscopic search for colliding stellar winds in O-type close binary systems. I - AO Cassiopeiae

    NASA Technical Reports Server (NTRS)

    Gies, Douglas R.; Wiggs, Michael S.

    1991-01-01

    AO Cas, a short-period, double-lined spectroscopic binary, is studied as part of a search for spectroscopic evidence of colliding stellar winds in binary systems of O-type stars. High S/N ratio spectra of the H-alpha and He I 6678-A line profiles are presented, and their orbital-phase-related variations are examined in order to derive the location and motions of high-density circumstellar gas in the system. These profile variations are compared with those observed in the UV stellar wind lines in IUE archival spectra. IUE spectra are also used to derive a system mass ratio by constructing cross-correlation functions of a single-lined phase spectrum with each of the other spectra. The resulting mass ratio is consistent with the rotational line broadening of the primary star, if the primary is rotating synchronously with the binary system. The best-fit models were found to have an inclination of 61.1 deg + or - 3.0 deg and have a primary which is close to filling its critical Roche lobe.

  17. Purification of Cytochrome P450 and Ferredoxin, Involved in Bisphenol A Degradation, from Sphingomonas sp. Strain AO1

    PubMed Central

    Sasaki, Miho; Akahira, Ayako; Oshiman, Ko-ichi; Tsuchido, Tetsuaki; Matsumura, Yoshinobu

    2005-01-01

    In a previous study (M. Sasaki, J. Maki, K. Oshiman, Y. Matsumura, and T. Tsuchido, Biodegradation 16:449-459, 2005), the cytochrome P450 monooxygenase system was shown to be involved in bisphenol A (BPA) degradation by Sphingomonas sp. strain AO1. In the present investigation, we purified the components of this monooxygenase, cytochrome P450 (P450bisd), ferredoxin (Fdbisd), and ferredoxin reductase (Redbisd). We demonstrated that P450bisd and Fdbisd are homodimeric proteins with molecular masses of 102.3 and 19.1 kDa, respectively, by gel filtration chromatography analysis. Spectroscopic analysis of Fdbisd revealed the presence of a putidaredoxin-type [2Fe-2S] cluster. P450bisd, in the presence of Fdbisd, Redbisd, and NADH, was able to convert BPA. The Km and kcat values for BPA degradation were 85 ± 4.7 ?M and 3.9 ± 0.04 min?1, respectively. NADPH, spinach ferredoxin, and spinach ferredoxin reductase resulted in weak monooxygenase activity. These results indicated that the electron transport system of P450bisd might exhibit strict specificity. Two BPA degradation products of the P450bisd system were detected by high-performance liquid chromatography analysis and were thought to be 1,2-bis(4-hydroxyphenyl)-2-propanol and 2,2-bis(4-hydroxyphenyl)-1-propanol based on mass spectrometry-mass spectrometry analysis. This is the first report demonstrating that the cytochrome P450 monooxygenase system in bacteria is involved in BPA degradation. PMID:16332782

  18. Liquid freshwater transport and Polar Surface Water characteristics in the East Greenland Current during the AO-02 Oden expedition

    NASA Astrophysics Data System (ADS)

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

    2008-07-01

    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, from the Fram Strait in the north to the Denmark Strait in the south. The survey reveals a strong confinement of the low-salinity polar water in the EGC to the continental slope/shelf-a feature of relevance for the stability of the thermohaline circulation in the Arctic Mediterranean. The southward transport of liquid freshwater in the EGC was found to vary considerably between the sections, ranging between 0.01 and 0.1 Sverdrup. Computations based on geostrophic as well as LADCP velocities give a section-averaged southward freshwater transport of 0.06 Sverdrup in the EGC during May 2002. Furthermore, Oden data suggest that the liquid freshwater transport was as large north of the Fram Strait as it was south of the Denmark Strait.

  19. 19 `eme Congr`es Francais de Mecanique Marseille, 24-28 ao^ut 2009 Transition to turbulence in globally subcritical systems

    E-print Network

    Boyer, Edmond

    through the nucleation and growth or decay of turbulent domains called puffs (PPF) or spots (PCF, and turbulent spots align to form oblique bands with the turbulent intensity becoming more and more uniform as R19 `eme Congr`es Franc¸ais de M´ecanique Marseille, 24-28 ao^ut 2009 Transition to turbulence

  20. 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

  1. 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

  2. Alignment and polarization of H(2p) following H/sup +/-He collisions studied using a unified AO-MO matching method

    SciTech Connect

    Kimura, M.; Lin, C.D.

    1986-01-01

    It is shown that the recently developed unified AO-MO matching method for ion-atom collisions is capable of providing details of the collision dynamics. This method is used to calculate the alignment and orientation parameters of H(2p) in p-He collisions and to show that the results are in good agreement with experimental measurements. In this AO-MO matching method, the time-dependent electronic wave function is expanded in terms of traveling atomic orbitals (AO) of the two collision centers at larger internuclear separations which is matched to the solution in the inner region where it is expanded in terms of molecular orbitals (MO) without any translational factors. In this calculation six sigma and two ..pi.. states are included in the MO expansion, and in the AO expansion the ground state, 2 /sup 1/S and /sup 1/2 P of helium and 1s, 2s and 2p states of hydrogen are included.

  3. SOCIEDADE MISTRIO Voo da Malsia Numa altura em que o Homem lana sondas para cartografar o planeta Marte, ningum sabe ao certo onde

    E-print Network

    Instituto de Sistemas e Robotica

    planeta Marte, ninguém sabe ao certo onde se encontra o avião da Malaysia Airlines, com 239 pessoas semanas antes, chegaram de Marte no- vas imagens recolhidas pela sonda "Cu- riosity". Mas duas semanas supertelescópios e os planos para via- gens a Marte, a verdade é que a Terra tem ainda muitas zonas negras quando

  4. 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…

  5. LDEF (Postflight), AO178 : A High-Resolution Study of Ultra-heavy Cosmic-Ray Nuclei, Tray C11

    NASA Technical Reports Server (NTRS)

    1990-01-01

    LDEF (Postflight), AO178 : A High-Resolution Study of Ultra-heavy Cosmic-Ray Nuclei, Tray C11 EL-1994-00299 LDEF (Postflight), AO178 : A High-Resolution Study of Ultra-heavy Cosmic-Ray Nuclei, Tray C11 The postflight photograph of the Ultra Heavy Cosmic Ray Experiment (UHCRE) was taken in SAEF II at KSC after removal of the experiment tray from the LDEF. The experiment tray flanges appear discolored by a light brown stain. Outlines of experiment tray clamp blocks are faint but visible on the upper and lower experiment tray flanges.The experiment tray holding fixture hardware covers the clamp block areas on the end flanges. The UHCRE detectors were contained in 16 peripheral LDEF trays with at least one UHCRE tray located on each row of the LDEF except row 3, row 9 and row 12. Each tray contains three cylindrical aluminum pressure vessels with an integral aluminum support structure. Each cylinder is filled with an Eccofoam insert that houses 4 UHCRE detector stacks. Each stack consist of layers of Lexan polycarbonate sheets (approximately 70) interleaved with several thin sheets of lead. Forty-seven of the 48 pressure vessels were pressurized to 1.0 bar of a dry gas mixture (oxygen, nitrogen and helium) and sealed. One of the units was left unsealed in order to investigate the effects of the vacuum environment on the detector materials. Thermal control was accomplished by attaching an aluminized Kapton thermal cover on the tray bottom (the Kapton facing the LDEF interior), placing the aluminum cylinder support structure on thermal isolators and covering the experiment with a thin (5 mil) silvered TEFLON® thermal cover. The silvered TEFLON® cover was supported by an aluminum frame, an integral part of the experiment structure, and held in place by Velcro pads selectively located on the frame and on the back of the cover. The copper colored strip extending over the trays lower flange is a copper coated pressure sensitive tape used to provide an electrical ground between the experiments thermal cover and the LDEF structure. The UHCRE thermal covers surface appears to have changed from specular to opaque with many black dots of various sizes that appear to be impact craters. Many of the craters appear to have a black center encircled by a brown halo and then by a white halo. Other white circular discolorations also appear on the cover surface. The darker discolorations probably result from an impact that penetrates the 5 mil TEFLON® film and allows atomic oxygen to oxidize and/or erode the vapor deposited silver layer beneath. The black feather shaped discoloration in the lower center of the thermal cover did not appear in the flight photograph and appears to be a particle from a degraded experiment that has attached itself to the cover. The cover is not stretched as taut as in the flight photograph and locations of Velcro attach pads are not as prominent. The ground strap appears to be in place with no visible damage but appears to be a deeper copper color.

  6. LDEF (Postflight), AO178 : A High-Resolution Study of Ultra-heavy Cosmic-Ray Nuclei, Tray D07

    NASA Technical Reports Server (NTRS)

    1990-01-01

    LDEF (Postflight), AO178 : A High-Resolution Study of Ultra-heavy Cosmic-Ray Nuclei, Tray D07 EL-1994-00207 LDEF (Postflight), AO178 : A High-Resolution Study of Ultra-heavy Cosmic-Ray Nuclei, Tray D07 The postflight photograph of the Ultra Heavy Cosmic Ray Experiment (UHCRE) was taken in SAEF II at KSC after removal of the experiment tray from the LDEF. The experiment tray flanges appear to be discolored by a light brown stain. An outline of experiment tray clamp block locations is clearly visible on the experiment trays upper flange and to a lesser extent on its lower flange. The holding fixture hardware covers the clamp block areas on the end flanges. The UHCRE detectors were contained in 16 peripheral LDEF trays with at least one UHCRE tray located on each row of the LDEF except row 3, row 9 and row 12. Each tray contains three cylindrical aluminum pressure vessels with an integral aluminum support structure. Each cylinder is filled with an Eccofoam insert that houses 4 UHCRE detector stacks. Each stack consist of layers of Lexan polycarbonate sheets (approximately 70) interleaved with several thin sheets of lead. Forty-seven of the 48 pressure vessels were pressurized to 1.0 bar of a dry gas mixture (oxygen, nitrogen and helium) and sealed. One of the units was left unsealed in order to investigate the effects of the vacuum environment on the detector materials. Thermal control was accomplished by attaching an aluminized Kapton thermal cover on the tray bottom (the Kapton facing the LDEF interior), placing the aluminum cylinder support structure on thermal isolators and covering the experiment with a thin (5 mil) silvered TEFLON® thermal cover. The silvered TEFLON® cover was supported by an aluminum frame, an integral part of the experiment structure, and held in place by Velcro pads selectively located on the frame and on the back of the cover. The copper colored strip extending over the trays lower flange is a copper coated pressure sensitive tape used to provide an electrical ground between the experiments thermal cover and the LDEF structure. The UHCRE thermal covers surface appears specular with green and white discolorations associated with photo lights and reflections of the surrounding area. The black and/or brown dots of various sizes appear to be points of impact and penetration of the TEFLON® cover. The impact point discoloration is probably the results of a penetration in the 5 mil TEFLON® film that affected the vapor deposited silver and inconel layers beneath.. The cover is not as taut as in the flight photograph and locations of the Velcro attach pads are not as prominent. The ground strap appears to be intact with no visible damage but appears to be a darker copper color than in the prelaunch photograph.

  7. LDEF (Postflight), AO178 : A High-Resolution Study of Ultra-heavy Cosmic-Ray Nuclei, Tray B07

    NASA Technical Reports Server (NTRS)

    1990-01-01

    LDEF (Postflight), AO178 : A High-Resolution Study of Ultra-heavy Cosmic-Ray Nuclei, Tray B07 EL-1994-00312 LDEF (Postflight), AO178 : A High-Resolution Study of Ultra-heavy Cosmic-Ray Nuclei, Tray B07 The postflight photograph of the Ultra Heavy Cosmic Ray Experiment (UHCRE) was taken in SAEF II at KSC after removal of the experiment tray from the LDEF. The outline of the experiment tray clamp blocks is clearly visible on the upper tray flange and to a lesser extent on the lower flange. The holding fixture hardware covers the clamp block areas on the end flanges. The prelaunch photograph of the Ultra Heavy Cosmic Ray Experiment (UHCRE) was taken in SAEF II at KSC prior to installation of the experiment tray on the LDEF. The UHCRE detectors were contained in 16 peripheral LDEF trays with at least one UHCRE tray located on each row of the LDEF except row 3, row 9 and row 12. Each tray contains three cylindrical aluminum pressure vessels with an integral aluminum support structure. Each cylinder is filled with an Eccofoam insert that houses 4 UHCRE detector stacks. Each stack consist of layers of Lexan polycarbonate sheets (approximately 70) interleaved with several thin sheets of lead. Forty-seven of the 48 pressure vessels were pressurized to 1.0 bar of a dry gas mixture (oxygen, nitrogen and helium) and sealed. One of the units was left unsealed in order to investigate the effects of the vacuum environment on the detector materials. Thermal control was accomplished by attaching an aluminized Kapton thermal cover on the tray bottom (the Kapton facing the LDEF interior), placing the aluminum cylinder support structure on thermal isolators and covering the experiment with a thin (5 mil) silvered TEFLON® thermal cover. The silvered TEFLON® cover was supported by an aluminum frame, an integral part of the experiment structure, and held in place by Velcro pads selectively located on the frame and on the back of the cover. The copper colored strip extending over the trays lower flange is a copper coated pressure sensitive tape used to provide an electrical ground between the experiments thermal cover and the LDEF structure. The UHCRE thermal covers surface appears to have changed from specular to opaque with black dots of various sizes that appear to be impact craters. An impact crater with a large area of white discoloration is clearly visible in the upper left quadrant of the thermal cover. The discoloration is probably the results of an impact penetration of the 5 mil TEFLON® film affecting the vapor deposited silver layer beneath. Many dots, black or brown in color and of varying sizes, can be seen on the cover. The cover is not stretched as taut as in the flight photograph and locations of Velcro attach pads are not as prominent. The ground strap appears to be in place with no visible damage but appears to be a deeper copper color than in the prelaunch photograph.

  8. LDEF (Postflight), AO178 : A High-Resolution Study of Ultra-heavy Cosmic-Ray Nuclei, Tray C08

    NASA Technical Reports Server (NTRS)

    1990-01-01

    LDEF (Postflight), AO178 : A High-Resolution Study of Ultra-heavy Cosmic-Ray Nuclei, Tray C08 EL-1994-00212 LDEF (Postflight), AO178 : A High-Resolution Study of Ultra-heavy Cosmic-Ray Nuclei, Tray C08 The postflight photograph of the Ultra Heavy Cosmic Ray Experiment (UHCRE) was taken in SAEF II at KSC after removal of the experiment tray from the LDEF. The experiment tray flanges appear discolored by a brown stain. Outlines of experiment tray clamp blocks are clearly visible on the upper and lower experiment tray flanges.The experiment tray holding fixture hardware covers the clamp block areas on the end flanges. The UHCRE detectors were contained in 16 peripheral LDEF trays with at least one UHCRE tray located on each row of the LDEF except row 3, row 9 and row 12. Each tray contains three cylindrical aluminum pressure vessels with an integral aluminum support structure. Each cylinder is filled with an Eccofoam insert that houses 4 UHCRE detector stacks. Each stack consist of layers of Lexan polycarbonate sheets (approximately 70) interleaved with several thin sheets of lead. Forty-seven of the 48 pressure vessels were pressurized to 1.0 bar of a dry gas mixture (oxygen, nitrogen and helium) and sealed. One of the units was left unsealed in order to investigate the effects of the vacuum environment on the detector materials. Thermal control was accomplished by attaching an aluminized Kapton thermal cover on the tray bottom (the Kapton facing the LDEF interior), placing the aluminum cylinder support structure on thermal isolators and covering the experiment with a thin (5 mil) silvered TEFLON® thermal cover. The silvered TEFLON® cover was supported by an aluminum frame, an integral part of the experiment structure, and held in place by Velcro pads selectively located on the frame and on the back of the cover. The copper colored strip extending over the trays lower flange is a copper coated pressure sensitive tape used to provide an electrical ground between the experiments thermal cover and the LDEF structure. The UHCRE thermal covers surface appears to have changed from specular to opaque (glossy white) with many black dots of various sizes that appear to be impact craters. Many of the craters appear to have a black center encircled by a brown halo and then by a white halo. Other white circular discolorations also appear on the cover surface. The darker discolorations are probably the results of an craters penetrating the 5 mil TEFLON® film allowing atomic oxygen to oxidize and/or erode the vapor deposited silver layer beneath. An item of interest is the impact crater in the lower right corner of the cover that has a spray pattern originating from the point of impact. The cover is not stretched as taut as in the flight photograph and locations of Velcro attach pads are not as prominent. The ground strap appears to be in place with no visible damage but appears to be a deeper copper color.

  9. LDEF (Flight), AO178 : A High-Resolution Study of Ultra-heavy Cosmic-Ray Nuclei, Tray A10

    NASA Technical Reports Server (NTRS)

    1990-01-01

    LDEF (Flight), AO178 : A High-Resolution Study of Ultra-heavy Cosmic-Ray Nuclei, Tray A10 EL-1994-00018 LDEF (Flight), AO178 : A High-Resolution Study of Ultra-heavy Cosmic-Ray Nuclei, Tray A10 The flight photograph of the Ultra Heavy Cosmic Ray Experiment (UHCRE) 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 clamp blocks located at the center of the experiment trays upper and right flanges appear to be in prelaunch condition while the one located at the left end of the trays lower flange appears slightly discolored. Note the dark brown stain on the LDEF structure adjacent to the edge of the black thermal cover. The UHCRE detectors were contained in 16 peripheral LDEF trays with at least one UHCRE tray located on each row of the LDEF except row 3, row 9 and row 12. Each tray contains three cylindrical aluminum pressure vessels with an integral aluminum support structure. Each cylinder is filled with an Eccofoam insert that houses 4 UHCRE detector stacks. Each stack consist of layers of Lexan polycarbonate sheets (approximately 70) interleaved with several thin sheets of lead. Forty-seven of the 48 pressure vessels were pressurized to 1.0 bar of a dry gas mixture (oxygen, nitrogen and helium) and sealed. One of the units was left unsealed in order to investigate the effects of the vacuum environment on the detector materials. Thermal control was accomplished by attaching an aluminized Kapton thermal cover on the tray bottom (the Kapton facing the LDEF interior), placing the aluminum cylinder support structure on thermal isolators and covering the experiment with a thin (5 mil) silvered TEFLON® thermal cover. The silvered TEFLON® cover was supported by an aluminum frame, an integral part of the experiment structure, and held in place by Velcro pads selectively located on the frame and on the back of the cover. The copper colored strip extending over the trays right flange is a copper coated pressure sensitive tape used to provide an electrical ground between the experiments thermal cover and the LDEF structure. The UHCRE thermal covers surface appears to have changed from specular to opaque with many black dots of various sizes that appear to be impact or penetration craters. A large impact crater is clearly visible in the lower right quadrant of the thermal cover. Many of the craters appear to be encircled by a white halo. Numerous circular white discolorations that appear to be impact points are visible on the covers surface. The cover appears to be stretched more than in the prelaunch photograph and the locations of Velcro attach pads are apparent. The ground strap appears to be in place with no visible damage but appears to be a darker color.

  10. LDEF (Flight), AO178 : A High-Resolution Study of Ultra-heavy Cosmic-Ray Nuclei, Tray D05

    NASA Technical Reports Server (NTRS)

    1990-01-01

    LDEF (Flight), AO178 : A High-Resolution Study of Ultra-heavy Cosmic-Ray Nuclei, Tray D05 EL-1994-00038 LDEF (Flight), AO178 : A High-Resolution Study of Ultra-heavy Cosmic-Ray Nuclei, Tray D05 The flight photograph of the Ultra Heavy Cosmic Ray Experiment (UHCRE) 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 block of the experiment trays upper flange and on the tray clamp blocks at each end of the trays lower flange appear to be discolored by a brown stain. The experiment tray flanges also appear to be discolored by the stain. The UHCRE detectors were contained in 16 peripheral LDEF trays with at least one UHCRE tray located on each row of the LDEF except row 3, row 9 and row 12. Each tray contains three cylindrical aluminum pressure vessels with an integral aluminum support structure. Each cylinder is filled with an Eccofoam insert that houses 4 UHCRE detector stacks. Each stack consist of layers of Lexan polycarbonate sheets (approximately 70) interleaved with several thin sheets of lead. Forty-seven of the 48 pressure vessels were pressurized to 1.0 bar of a dry gas mixture (oxygen, nitrogen and helium) and sealed. One of the units was left unsealed in order to investigate the effects of the vacuum environment on the detector materials. Thermal control was accomplished by attaching an aluminized Kapton thermal cover on the tray bottom (the Kapton facing the LDEF interior), placing the aluminum cylinder support structure on thermal isolators and covering the experiment with a thin (5 mil) silvered TEFLON® thermal cover. The silvered TEFLON® cover was supported by an aluminum frame, an integral part of the experiment structure, and held in place by Velcro pads selectively located on the frame and on the back of the cover. The copper colored strip extending over the trays lower flange is a copper coated pressure sensitive tape used to provide an electrical ground between the experiments thermal cover and the LDEF structure. The UHCRE thermal cover appears to be intact with no apparent damage but is stretched more taut than in the prelaunch photograph. The glossy blue-black appearance of the thermal cover in this photograph is apparently due to lighting conditions and not a change in the material optical properties. A vertical strip of discoloration, approximately six inches wide and with a grain pattern, extends from top to bottom along the right edge of the thermal cover. The oblong indentations in the thermal cover are in areas where Velcro pads are bonded to the backside of the cover. The irregular shaped discolorations on the cover surface appear to from lighting and reflections. The several white dots and the circular indents in the right center of the cover may be impact locations. The ground strap appears to be in place with no visible damage.

  11. LDEF (Postflight), AO178 : A High-Resolution Study of Ultra-heavy Cosmic-Ray Nuclei, Tray D01

    NASA Technical Reports Server (NTRS)

    1990-01-01

    LDEF (Postflight), AO178 : A High-Resolution Study of Ultra-heavy Cosmic-Ray Nuclei, Tray D01 EL-1994-00188 LDEF (Postflight), AO178 : A High-Resolution Study of Ultra-heavy Cosmic-Ray Nuclei, Tray D01 The postflight photograph of the Ultra Heavy Cosmic Ray Experiment (UHCRE) was taken in SAEF II at KSC prior to removal of the experiment tray from the LDEF. The white paint dot on the experiment tray clamp block located at the center of the trays lower flange appears to be discolored by a brown stain. The experiment trays lower flange also appear to be coated but with a lighter colored stain. The white paint dots on clamp blocks at each end of the trays upper flange appear to be discolored very little. The UHCRE detectors were contained in 16 peripheral LDEF trays with at least one UHCRE tray located on each row of the LDEF except row 3, row 9 and row 12. Each tray contains three cylindrical aluminum pressure vessels with an integral aluminum support structure. Each cylinder is filled with an Eccofoam insert that houses 4 UHCRE detector stacks. Each stack consist of layers of Lexan polycarbonate sheets (approximately 70) interleaved with several thin sheets of lead. Forty-seven of the 48 pressure vessels were pressurized to 1.0 bar of a dry gas mixture (oxygen, nitrogen and helium) and sealed. One of the units was left unsealed in order to investigate the effects of the vacuum environment on the detector materials. Thermal control was accomplished by attaching an aluminized Kapton thermal cover on the tray bottom (the Kapton facing the LDEF interior), placing the aluminum cylinder support structure on thermal isolators and covering the experiment with a thin (5 mil) silvered TEFLON® thermal cover. The silvered TEFLON® cover was supported by an aluminum frame, an integral part of the experiment structure, and held in place by Velcro pads selectively located on the frame and on the back of the cover. The copper colored strip extending over the trays lower flange is a copper coated pressure sensitive tape used to provide an electrical ground between the experiments thermal cover and the LDEF structure. The UHCRE thermal cover appears specular and intact with no visible damage. The bright irregular shaped discoloration located above the grounding strap and about one third of the height of the thermal cover from its bottom edge did not appear in the flight photograph and appears to be a piece of material from a degraded experiment that has attached itself to the cover. The cover has numerous white dots visible on its surface that may also be debris from other degraded experiments. The cover is less taut than in the flight photograph but locations of the Velcro attach pads are still easily detected. The scalloped effect around the thermal cover outer edges occurs between the cover attach points. The grounding strap in the center of the experiment tray lower flange appears to be a darker color than in the prelaunch photograph.

  12. LDEF (Flight), AO178 : A High-Resolution Study of Ultra-heavy Cosmic-Ray Nuclei, Tray B07

    NASA Technical Reports Server (NTRS)

    1990-01-01

    LDEF (Flight), AO178 : A High-Resolution Study of Ultra-heavy Cosmic-Ray Nuclei, Tray B07 EL-1994-00087 LDEF (Flight), AO178 : A High-Resolution Study of Ultra-heavy Cosmic-Ray Nuclei, Tray B07 The flight photograph of the Ultra Heavy Cosmic Ray Experiment (UHCRE) 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 left flange and lower flange appear to be slightly discolored but the paint dot on the clamp block located at the right end of the upper flange appears to be stained less. The UHCRE detectors were contained in 16 peripheral LDEF trays with at least one UHCRE tray located on each row of the LDEF except row 3, row 9 and row 12. Each tray contains three cylindrical aluminum pressure vessels with an integral aluminum support structure. Each cylinder is filled with an Eccofoam insert that houses 4 UHCRE detector stacks. Each stack consist of layers of Lexan polycarbonate sheets (approximately 70) interleaved with several thin sheets of lead. Forty-seven of the 48 pressure vessels were pressurized to 1.0 bar of a dry gas mixture (oxygen, nitrogen and helium) and sealed. One of the units was left unsealed in order to investigate the effects of the vacuum environment on the detector materials. Thermal control was accomplished by attaching an aluminized Kapton thermal cover on the tray bottom (the Kapton facing the LDEF interior), placing the aluminum cylinder support structure on thermal isolators and covering the experiment with a thin (5 mil) silvered TEFLON® thermal cover. The silvered TEFLON® cover was supported by an aluminum frame, an integral part of the experiment structure, and held in place by Velcro pads selectively located on the frame and on the back of the cover. The copper colored strip extending over the trays lower flange is a copper coated pressure sensitive tape used to provide an electrical ground between the experiments thermal cover and the LDEF structure. The UHCRE thermal cover appears to be intact with no apparent damage but is stretched more taut than in the prelaunch photograph. The dark blue appearance of the thermal cover in this photograph is apparently due to lighting conditions and not a change in the material optical properties. The oblong indentations on the dark thermal cover background are areas where Velcro pads are bonded to the backside of the cover. The thermal covers surface appears to have small brown circular discolorations of various sizes that appear to be impact craters. An impact crater surrounded by a large light blue area of discoloration is clearly visible in the lower right quadrant of the thermal cover. The discoloration is probably the results of an impact crater penetrating the 5 mil TEFLON® film and upsetting the vapor deposited silver layer beneath. The scalloped edge effect along the left side of the thermal cover occurs between attach points. The ground strap appears to be in place with no visible damage but appears to be a deeper copper color than in the prelaunch photograph.

  13. Ferredoxin from sweet pepper (Capsicum annuum L.) intensifying harpin(pss)-mediated hypersensitive response shows an enhanced production of active oxygen species (AOS).

    PubMed

    Dayakar, Badri Venkata; Lin, Hao-Jan; Chen, Cheng-Hsien; Ger, Mang-Jye; Lee, Bor-Heng; Pai, Chia-Hwei; Chow, David; Huang, Hsiang-En; Hwang, Shaw-Yhi; Chung, Mei-Chu; Feng, Teng-Yung

    2003-04-01

    The hypersensitive response (HR) is a form of cell death associated with plant resistance to pathogen infection. Harpin(pss), an elicitor from the bacterium Pseudomonas syringae pv. syringae, induces a HR in non-host plants. Previously, we reported an amphipathic protein from sweet pepper interfering with harpin(pss)-mediated HR. In this report, we isolated and characterized a cDNA clone encoded that amphipathic protein from sweet pepper. This protein is designated as PFLP (plant ferredoxin-like protein) by virtue of its high homology with plant ferredoxin protein containing an N-terminal signal peptide responsible for chloroplast targeting and a putative 2Fe-2S domain responsible for redox activity. Recombinant PFLP obtained from Escherichia coli was able to significantly increase active oxygen species (AOS) generation when mixed with harpin(pss) in tobacco suspension cells. It also showed enhanced HR when co-infiltrated with harpin(pss) in tobacco leaves. We used a transgenic tobacco suspension cells system that constitutively expresses the Pflp gene driven by the CaMV 35S promoter to study the function of PFLP in enhancing harpin(pss)-mediated hypersensitive cell death in vivo. In response to harpin(pss), suspension cells derived from Pflp transgenic tobacco showed a significant increase both in the generation of AOS and in cell death as compared to the wild type. AOS inhibitors diphenylene iodonium chloride (DPI) and lanthanum chlorate (LaCl3) were used to study the involvement of AOS in harpin(pss)-induced cell death. Our results demonstrate enhanced generation of AOS is necessary to cause enhanced hypersensitive cell death in Pflp transgenic tobacco cells and it is plasma membrane-bound NADPH-oxidase-dependent. Sub-cellular localization studies showed that PFLP is present in the cytoplasm and chloroplast of Pflp transgenic tobacco cells, but only in the chloroplast, not in the cytoplasm, of wild-type tobacco cells. It is possible that PFLP can change the redox state of the cell upon harpin(pss) inoculation to increase AOS generation and hypersensitive cell death. Overall, this study will provide a new insight in the functional properties of ferredoxin in hypersensitive cell death. PMID:12777051

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

    E-print Network

    Instituto de Sistemas e Robotica

    Ajuda externa: Programa da 'troika' tem de ir evoluindo ao longo do tempo - Fernando Ulrich Lisboa pelos pecadores a nível de cortes. Falando à margem da inauguração do Laboratório de Células Estaminais IST, que "o programa da 'troika' tem de ir evoluindo ao longo do tempo". Ulrich acrescentou mesmo

  15. 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.

  16. SIMS chemical analysis of extended impacts on the leading and trailing edges of LDEF experiment AO187-2

    NASA Technical Reports Server (NTRS)

    Amari, S.; Foote, J.; Simon, Charles G.; Swan, P.; Walker, R. M.; Zinner, E.; Jessberger, E. K.; Lange, G.; Stadermann, F.

    1992-01-01

    The Long Duration Exposure Facility (LDEF) Experiment AO187-2 consisted of 237 capture cells, 120 on the leading edge and 117 on the trailing edge. Each cell was made of polished Ge plates covered with 2.5 micron thick mylar foil at 200 microns from the Ge. Although all leading edge cells and 105 trailing edge cells had lost their plastic covers during flight, optical and electron microscope examination revealed extended impacts in bare cells from either edge that apparently were produced by high velocity projectiles while the plastic foils were still in place. Detailed optical scanning yielded 53 extended impacts on 100 bare cells from the trailing edge that were selected for SIMS chemical analysis. Lateral multi-element ion probe profiles were obtained on 40 of these impacts. Material that can be attributed to the incoming projectiles was found in all analyzed extended compact features and most seem to be associated with cosmic dust particles. However, LDEF deposits are systematically enriched in the refractory elements Al, Ca, and Ti relative to Mg and Fe when compared to IDP's collected in the stratosphere and to chondritic compositions. These differences are most likely due to elemental fractionation effects during the high velocity impact but real differences between interplanetary particles captured on LDEF and stratospheric IDP's cannot be excluded. Recently we extended our studies to cells from the leading edge and the covered cells from the trailing edge. The 12 covered cells contain 20 extended impact candidates. Ion probe analysis of 3 yielded results similar to those obtained for impacts on the bare cells from the trailing edge. Optical scanning of the bare leading edge cell also reveals many extended impacts (42 on 22 cells scanned to date), demonstrating that the cover foils remained intact at least for some time. However, SIMS analysis showed elements that can reasonably be attributed to micrometeoroids in only 2 out of 11 impacts. Eight impacts have residues dominated by Al and one dominated by Ti, indicating a preponderance of orbital debris in leading edge impacts.

  17. HIGH-RESOLUTION IMAGES OF ORBITAL MOTION IN THE ORION TRAPEZIUM CLUSTER WITH THE LBT AO SYSTEM

    SciTech Connect

    Close, L. M.; Males, J. R.; Skemer, A.; McCarthy, D. W.; Xompero, M.; Kulesa, C. [Steward Observatory, University of Arizona, Tucson, AZ 85721 (United States); Puglisi, A.; Busoni, L.; Pinna, E.; Riccardi, A.; Quiros-Pacheco, F.; Argomedo, J.; Esposito, S.; Mannucci, F. [INAF-Osservatorio Astrofisico di Arcetri, I-50125 Firenze (Italy); Arcidiacono, C. [INAF-Osservatorio Astronomico di Bologna, I-40127 Bologna (Italy); Guerra, J. C.; Brusa, G.; Miller, D. L.; Brynnel, J.; Boutsia, K., E-mail: lclose@as.arizona.edu [LBT Observatory, University of Arizona, Tucson, AZ 85721 (United States); and others

    2012-04-20

    The new 8.4 m LBT adaptive secondary AO system, with its novel pyramid wavefront sensor, was used to produce very high Strehl ({approx}> 75% at 2.16 {mu}m) near-infrared narrowband (Br{gamma}: 2.16 {mu}m and [Fe II]: 1.64 {mu}m) images of 47 young ({approx}1 Myr) Orion Trapezium {theta}{sup 1} Ori cluster members. The inner {approx}41 Multiplication-Sign 53'' of the cluster was imaged at spatial resolutions of {approx}0.''050 (at 1.64 {mu}m). A combination of high spatial resolution and high S/N yielded relative binary positions to {approx}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 {approx}0.3 mas yr{sup -1} (0.6 km s{sup -1} at 450 pc); this is a {approx}7 Multiplication-Sign improvement in orbital velocity accuracy compared to previous efforts. We now detect clear orbital motions in the {theta}{sup 1} Ori B{sub 2} B{sub 3} system of 4.9 {+-} 0.3 km s{sup -1} and 7.2 {+-} 0.8 km s{sup -1} in the {theta}{sup 1} Ori A{sub 1} A{sub 2} system (with correlations of P.A. versus time at >99% confidence). All five members of the {theta}{sup 1} Ori B system appear likely a gravitationally bound 'mini-cluster'. The very lowest mass member of the {theta}{sup 1} Ori B system (B{sub 4}; mass {approx}0.2 M{sub Sun }) has, for the first time, a clearly detected motion (at 4.3 {+-} 2.0 km s{sup -1}; correlation = 99.7%) w.r.t. B{sub 1}. However, B{sub 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.

  18. 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.

  19. Theoretical study on the aromaticity from d-AOs in cationic X(3)(+) (X = Sc, Y, La) clusters.

    PubMed

    Chi, Xian Xing; Lin, Xing Zhan

    2011-04-01

    The stable structures and aromatic characters for three cationic X(3)(+) (X = Sc, Y, and La) and three relevant neutral X(3)Cl (X = Sc, Y, La) clusters are investigated at the DFT and post HF level of theory. The calculated results show that the X(3)(+) cations each has two stable structures: the regular trigon (D(3h)) and the line (D?h) with the regular trigon (D(3h)) being the ground state, while for three neutral X(3)Cl clusters, Sc(3)Cl has three stable isomers: the trigon-pyramidal (C(3v)), bidentate (C(2v)-1), and C(2v)-2 structures, Y(3)Cl and La(3)Cl each has only two stable isomers: the trigon-pyramidal (C(3v)) and bidentate (C(2v)-1) structures. The ground states for three X(3)Cl species are all the bidentate (C(2v)-1) isomers. The calculations of the resonance energy (RE) and NICS show that trigonal X(3)(+) isomers exhibit higher degree of aromaticity. The detailed molecular orbital analyzes reveal that the isolated trigonal Sc(3)(+) and Y(3)(+) cations each has one delocalized ?-type MO and shows single ?-aromaticity, while the isolated trigonal La(3)(+) cation has one delocalized ?-type MO and shows single ?-aromaticity. The single ?- or ?-aromaticity for X(3)(+) are attributed to the contributions mainly from the d AOs of the corresponding transition metal X atoms. However, when a singly negatively charged counterion Cl(-) is added to Sc(3)(+), Y(3)(+), and La(3)(+) cations respectively, the aromatic type for the two Sc(3)(+), Y(3)(+) units in the corresponding neutral Sc(3)Cl, Y(3)Cl complexes are changed from ?-aromaticity into ?-aromaticity, whereas the ?-aromaticity of the La(3)(+) units in the La(3)Cl complex keeps unchanged in this process. Thus three Sc(3)(+), Y(3)(+), La(3)(+) units in the corresponding X(3)Cl complexes all have only one ?-type MO and exhibit single ?-aromaticity. PMID:20593211

  20. ACESSO AO PORTAL DE PERIDICOS DA CAPES PELA COMUNIDADE ACADMICA FEDERADA CAFe / RNP 1 Acesse o Portal de Peridicos da CAPES www.periodicos.capes.gov.br

    E-print Network

    Paraná, Universidade Federal do

    ACESSO AO PORTAL DE PERI�DICOS DA CAPES PELA COMUNIDADE ACAD�MICA FEDERADA ­ CAFe / RNP 1º Acesse o Portal de Periódicos da CAPES www.periodicos.capes.gov.br #12;2º Clique no link CAFe ­ Comunidade do Portal de Periódicos da CAPES para poder usar a ferramenta Meu Espaço. Mas, se preferir pode

  1. Radio-to-UV monitoring of AO 0235+164 by the WEBT and Swift during the 2006-2007 outburst?

    Microsoft Academic Search

    C. M. Raiteri; M. Villata; V. M. Larionov; M. F. Aller; U. Bach; M. Gurwell; O. M. Kurtanidze; A. Lähteenmäki; K. Nilsson; A. Volvach; H. D. Aller; A. A. Arkharov; R. Bachev; A. Berdyugin; M. Böttcher; C. S. Buemi; P. Calcidese; E. Cozzi; A. Di Paola; M. Dolci; J. H. Fan; E. Forné; L. Foschini; V. A. Hagen-Thorn; L. Hooks; T. Hovatta; M. Joshi; M. Kadler; T. S. Konstantinova; A. Kostov; T. S. Konstantinova; L. Lanteri; L. V. Larionova; C.-U. Lee; P. Leto; E. Lindfors; F. Montagni; R. Nesci; E. Nieppola; M. G. Nikolashvili; J. Ohlert; A. Oksanen; E. Ovcharov; P. Paakkonen; M. Pasanen; T. Pursimo; J. A. Ros; E. Semkov; R. L. Smart; A. Strigachev; L. O. Takalo; K. Torii; I. Torniainen; M. Tornikoski; C. Trigilio; H. Tsunemi; G. Umana; A. Valcheva; Anoop Gupta

    2000-01-01

    Context. The blazar AO 0235+164 was claimed to show a quasi-periodic behaviour in the radio and optical bands in the past, with the main outbursts repeating every 5-6 years. However, the predicted 2004 outburst did not occur, and further analysis suggested a longer time scale, according to which the next event would have occurred in the 2006-2007 observing season. Moreover,

  2. 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 T� other people who may collect you child please list anyone who is forbidden to have access to your child

  3. The WEBT campaign to observe AO 0235+16 in the 2003-2004 observing season. Results from radio-to-optical monitoring and XMM-Newton observations

    Microsoft Academic Search

    C. M. Raiteri; M. Villata; M. A. Ibrahimov; V. M. Larionov; M. Kadler; H. D. Aller; M. F. Aller; Y. Y. Kovalev; L. Lanteri; K. Nilsson; I. E. Papadakis; T. Pursimo; G. E. Romero; H. Teräsranta; M. Tornikoski; A. A. Arkharov; D. Barnaby; A. Berdyugin; M. Böttcher; K. Byckling; M. T. Carini; D. Carosati; S. A. Cellone; S. Ciprini; J. A. Combi; S. Crapanzano; R. Crowe; A. di Paola; M. Dolci; L. Fuhrmann; M. Gu; V. A. Hagen-Thorn; P. Hakala; V. Impellizzeri; S. Jorstad; J. Kerp; G. N. Kimeridze; Yu. A. Kovalev; A. Kraus; T. P. Krichbaum; O. M. Kurtanidze; A. Lähteenmäki; E. Lindfors; M. G. Mingaliev; R. Nesci; M. G. Nikolashvili; J. Ohlert; M. Orio; L. Ostorero; M. Pasanen; A. Pati; C. Poteet; E. Ros; J. A. Ros; P. Shastri; L. A. Sigua; A. Sillanpää; N. Smith; L. O. Takalo; G. Tosti; A. Vasileva; S. J. Wagner; R. Walters; J. R. Webb; W. Wills; A. Witzel; E. Xilouris

    2005-01-01

    A multiwavelength campaign to observe the BL Lac object AO 0235+16 (z=0.94) was set up by the Whole Earth Blazar Telescope (WEBT) collaboration during the observing seasons 2003-2004 and 2004-2005, involving radio, near-IR and optical photometric monitoring, VLBA monitoring, optical spectral monitoring, and three pointings by the XMM-Newton satellite. Here we report on the results of the first season, which

  4. Site symmetry of AO4 complexes ( A are s- or p-elements of periods III and IV) in crystal structures

    NASA Astrophysics Data System (ADS)

    Serezhkin, V. N.; Savchenkov, A. V.; Urusov, V. S.

    2010-03-01

    The symmetry of the sites occupied in crystal structures by 17 405 crystallographically different A atoms ( A are s or p elements of periods III and IV) entering the composition of AO{4/ z-} complexes has been analyzed. A periodicity in the ability of A atoms for implementing a certain site symmetry is established. Some features of the stereochemistry of A elements in the dependence of their position in the periodic table are discussed.

  5. Site symmetry of AO{sub 4} complexes (A are s- or p-elements of periods III and IV) in crystal structures

    SciTech Connect

    Serezhkin, V. N., E-mail: serezhkin@ssu.samara.ru; Savchenkov, A. V. [Samara State University (Russian Federation); Urusov, V. S. [Moscow State University (Russian Federation)

    2010-03-15

    The symmetry of the sites occupied in crystal structures by 17 405 crystallographically different A atoms (A are s or p elements of periods III and IV) entering the composition of AO{sub 4}{sup z-} complexes has been analyzed. A periodicity in the ability of A atoms for implementing a certain site symmetry is established. Some features of the stereochemistry of A elements in the dependence of their position in the periodic table are discussed.

  6. New Extinction and Mass Estimates from Optical Photometry of the Very Low Mass Brown Dwarf Companion CT Chamaeleontis B with the Magellan AO System

    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.

  7. InnoPOL: an EMCCD imaging polarimeter and 85-element curvature AO system on the 3.6-m AEOS telescope for cost effective polarimetric speckle suppression

    NASA Astrophysics Data System (ADS)

    Harrington, David; Berdyugina, Svetlana; Chun, Mark; Ftaclas, Christ; Gisler, Daniel; Kuhn, Jeff

    2014-08-01

    The Hokupa'a-85 curvature adaptive optics system components have been adapted to create a new AO-corrected coudé instrument at the 3.67m Advanced Electro-Optical System (AEOS) telescope. This new AO-corrected optical path is designed to deliver an f/40 diffraction-limited focus at wavelengths longer than 800nm. A new EMCCD-based dual-beam imaging polarimeter called InnoPOL has been designed and is presently being installed behind this corrected f/40 beam. The InnoPOL system is a flexible platform for optimizing polarimetric performance using commercial solutions and for testing modulation strategies. The system is designed as a technology test and demonstration platform as the coudé path is built using off-the-shelf components wherever possible. Models of the polarimetric performance after AO correction show that polarization modulation at rates as slow as 200Hz can cause speckle correlations in brightness and focal plane location sufficient enough to change the speckle suppression behavior of the modulators. These models are also verified by initial EMCCD scoring camera data at AEOS. Substantial instrument trades and development efforts are explored between instrument performance parameters and various polarimetric noise sources.

  8. 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.

  9. Kahua A'o: A Learning Foundation: Using Hawaiian Language Newspaper Articles for Place and Culture-based Geoscience Teacher Education and Curriculum Development

    NASA Astrophysics Data System (ADS)

    Ellinwood, I.; Stone, K.; Spencer, L.

    2012-12-01

    Kahua A'o is a collaborative project funded by the National Science Foundation aimed at developing science curriculum grounded in Hawaiian culture and place-based education. The project team is composed of members who contribute expertise in meteorology, geology, curriculum development, and Hawaiian language. To date, six lessons have been produced, four with a focus in meteorology and two with a focus in geology. The lessons are geared towards the middle school level, but can easily be adapted for other levels. Each lesson combines a scientific topic with relevant Hawaiian language resources. Serving as the main source for resources is the Hawaiian language newspaper archive, which is an online database of 75,000 pages from newspapers that were published between 1834 and 1948. By incorporating Hawaiian language newspaper articles into science lessons, we aim to teach science through culture and show a history of scientific inquiry intrinsic to Hawaiian culture in order to generate more interest in science among Hawai'i students, especially native Hawaiian students, who are underrepresented in scientific fields. Since most of the articles are specific to the Hawaiian Islands, all students will find more relevance with the lesson through place-based education. Kahua A'o lessons are currently being piloted with groups of public school teachers. Bishop Museum is also incorporating elements of the meteorology lessons into their science education curriculum. The goal of Kahua A'o is to become the first of many such interdisciplinary collaborations, especially those that utilize the rich repository of untapped knowledge in the Hawaiian language newspaper archive.

  10. Backside-illuminated, high-QE, 3e- RoN, fast 700fps, 1760x1680 pixels CMOS imager for AO with highly parallel readout

    NASA Astrophysics Data System (ADS)

    Downing, Mark; Kolb, Johann; Baade, Dietrich; Balard, Philippe; Dierickx, Bart; Defernez, Arnaud; Dupont, Benoit; Feautrier, Philippe; Finger, Gert; Fryer, Martin; Gach, Jean-Luc; Guillaume, Christian; Hubin, Norbert; Iwert, Olaf; Jerram, Paul; Jorden, Paul; Pike, Andrew; Pratlong, Jerome; Reyes, Javier; Stadler, Eric; Walker, Andrew

    2012-07-01

    The success of the next generation of instruments for 8 to 40-m class telescopes will depend upon improving the image quality (correcting the distortion caused by atmospheric turbulence) by exploiting sophisticated Adaptive Optics (AO) systems. One of the critical components of the AO systems for the E-ELT has been identified as the Laser/Natural Guide Star (LGS/NGS) WaveFront Sensing (WFS) detector. The combination of large format, 1760x1680 pixels to finely sample (84x84 sub-apertures) the wavefront and the spot elongation of laser guide stars, fast frame rate of 700 (up to 1000) frames per second, low read noise (< 3e-), and high QE (> 90%) makes the development of such a device extremely challenging. Design studies by industry concluded that a thinned and backside-illuminated CMOS Imager as the most promising technology. This paper describes the multi-phased development plan that will ensure devices are available on-time for E-ELT first-light AO systems; the different CMOS pixel architectures studied; measured results of technology demonstrators that have validated the CMOS Imager approach; the design explaining the approach of massive parallelism (70,000 ADCs) needed to achieve low noise at high pixel rates of ~3 Gpixel/s ; the 88 channel LVDS data interface; the restriction that stitching (required due to the 5x6cm size) posed on the design and the solutions found to overcome these limitations. Two generations of the CMOS Imager will be built: a pioneering quarter sized device of 880x840 pixels capable of meeting first light needs of the E-ELT called NGSD (Natural Guide Star Detector); followed by the full size device, the LGSD (Laser Guide Star Detector). Funding sources: OPTICON FP6 and FP7 from European Commission and ESO.

  11. Crystallisation kinetics in AO-Al2O3SiO2B2O3 glasses (A = Ba, Ca, Mg)

    Microsoft Academic Search

    N. Lahl; K. Singh; L. Singheiser; K. Hilpert; D. Bahadur

    2000-01-01

    The crystallisation kinetics of AO-Al2O3-SiO2-B2O3glasses (A = Ba, Ca, Mg) was investigated using DTA, XRD, and microstructural studies. Moreover, the influence of nucleating agentssuch as TiO2, ZrO2, Cr2O3, and Ni on MgO base glasses waselucidated. The glasses are of interest for the development ofsealants in Solid Oxide Fuel Cells (SOFC). The activation energy ofcrystal growth, Ea, was evaluated for the

  12. Construction of a mouse Aos1-Uba2 chimeric SUMO-E1 enzyme, mAU, and its expression in baculovirus-insect cells.

    PubMed

    Nakayama, Tomofumi; Yuasa, Eri; Kanemaru, Ayumi; Saito, Masayuki; Saitoh, Hisato

    2014-01-01

    Small ubiquitin-related modifier (SUMO) is a highly conserved protein that is covalently attached to target proteins. This posttranslational modification, designated SUMOylation, is a major protein-conjugation-driven strategy designed to regulate structure and function of cellular proteins. SUMOylation consists of an enzymatic cascade involving the E1-activating enzyme and the E2-conjugating enzyme. The SUMO-E1 enzyme consists of two subunits, a heterodimer of activation of Smt3p 1 (Aos1) and ubiquitin activating enzyme 2 (Uba2), which resembles the N- and C-terminal halves of ubiquitin E1 (Uba1). Herein, we describe the rational design of a single polypeptide version of SUMO-E1, a chimera of mouse Aos1 and Uba2 subunits, termed mAU, in which the functional domains appear to be arranged in a fashion similar to Uba1. We also describe the construction of a mAU plasmid for expression in a baculovirus-insect cell system and present an in situ SUMOylation assay using the recombinant mAU. Our results showed that mAU has SUMO-E1 activity, thereby indicating that mAU can be expressed in baculovirus-insect cells and represents a suitable source of SUMO-E1. PMID:24637489

  13. 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.

  14. A modified posteromedial approach combined with extensile anterior for the treatment of complex tibial pilon fractures (AO/OTA 43-C).

    PubMed

    Assal, Mathieu; Ray, Adrien; Fasel, Jean H D; Stern, Richard

    2014-06-01

    The anterior approaches that have been described for open reduction internal fixation of multifragmentary pilon fractures are designed to reconstruct the comminuted and impacted anterior articular surface onto a stable posterior column. Thus, reduction of the posterior column, particularly proper length, is critical. There are differing opinions of how best to surgically approach the posterior pilon fracture. There is also no clear indication as to the timing of both anterior and posterior reconstructions. Our objectives were (1) to develop a more midline posterior approach that might provide better visualization of the posterior aspect of the posterior column and juxtametaphyseal/diaphyseal parts of the tibia, first on the cadaver and then with patients, and (2) to use this as part of a combined posterior and anterior approach during the same anesthesia for complex tibial pilon fractures (AO/OTA 43-C) in a preliminary study of 6 patients. PMID:24857906

  15. Reconstruction of High Dynamic Range Images: Simulations of LBT Observations of a Stellar Jet, a Pathfinder Study for Future AO-Assisted Giant Telescopes

    NASA Astrophysics Data System (ADS)

    La Camera, A.; Antoniucci, S.; Bertero, M.; Boccacci, P.; Lorenzetti, D.; Nisini, B.; Arcidiacono, C.

    2014-02-01

    We present simulated Large Binocular Telescope (LBT) infrared narrow-band observations of a star-jet system, in conjunction with improved and optimized deconvolution and image reconstruction algorithms, considering two cases of interest: single-dish direct imaging with an AO-assisted camera and imaging through a Fizeau interferometer that combines the beams of the two mirrors of LBT. We aim at understanding what accuracy can be obtained with the use of present AO-assisted large telescopes (such as LBT) and what improvements an interferometric instrument (such as LINC-NIRVANA) will be able to provide. The proposed deconvolution method is based on the target decomposition as a sum of a point source (the star) and an extended source (the jet). By assuming Poisson noise we add to the negative logarithm of the likelihood a regularization term enforcing smoothness of the jet component. Finally, we use a Richardson-Lucy-like method for the minimization of this function. This approach is an improvement of a method proposed by Lucy in 1994 for accurate photometric restoration of HST images and called two channel photometric restoration. We denote the new method as the multi-component Richardson-Lucy (MC-RL) method. The analysis of the reconstructed objects shows that the MC-RL method applied to the interferometric observations allows us to evaluate the width and the spatial intensity profile of the jet down to 20 mas with an accuracy better than about 20% in the best case of a central star fainter than 10 mag. These limits allow us to obtain a very good reconstruction of the jet acceleration region very close to the exciting source, which would provide fundamental scientific information on the jet collimation degree and eventually on its launching mechanism. As concerns the proposed MC-RL method, it demonstrates a good performance in the reconstruction of images with a very high dynamic range. It can be improved in several directions, by increasing both its efficiency, thanks to recently proposed acceleration techniques, and its accuracy by means of more sophisticated regularization terms. We are also planning to apply the method to simulated observations of upcoming super giant earth-based telescopes.

  16. 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

  17. Summary Report of the First International Symposium on Strain Gauge Balances and Workshop on AoA/Model Deformation Measurement Techniques

    NASA Technical Reports Server (NTRS)

    Tripp, John S.; Tcheng, Ping; Burner, Alpheus W.; Finley, Tom D.

    1999-01-01

    The first International Symposium on Strain Gauge Balances was sponsored under the auspices of the NASA Langley Research Center (LaRC), Hampton, Virginia during October 22-25, 1996. Held at the LaRC Reid Conference Center, the Symposium provided an open international forum for presentation, discussion, and exchange of technical information among wind tunnel test technique specialists and strain gauge balance designers. The Symposium also served to initiate organized professional activities among the participating and relevant international technical communities. The program included a panel discussion, technical paper sessions, tours of local facilities, and vendor exhibits. Over 130 delegates were in attendance from 15 countries. A steering committee was formed to plan a second international balance symposium tentatively scheduled to be hosted in the United Kingdom in 1998 or 1999. The Balance Symposium was followed by the half-day Workshop on Angle of Attack and Model Deformation on the afternoon of October 25. The thrust of the Workshop was to assess the state of the art in angle of attack (AoA) and model deformation measurement techniques and to discuss future developments.

  18. Summary Report of the First International Symposium on Strain Gauge Balances and Workshop on AoA/Model Deformation Measurement Techniques

    NASA Technical Reports Server (NTRS)

    Tripp, John S.; Tcheng, Ping; Burner, Alpheus W.; Finley, Tom D.

    1998-01-01

    The first International Symposium on Strain Gauge Balances was sponsored under the auspices of the NASA Langley Research Center (LaRC), Hampton, Virginia. Held at the LaRC Reid Conference Center, the Symposium provided an open international forum for presentation, discussion, and exchange of technical information among wind tunnel test technique specialists and strain gauge balance designers. The Symposium also served to initiate organized professional activities among the participating and relevant international technical communities. The program included a panel discussion, technical paper sessions, tours of local facilities, and vendor exhibits. Over 130 delegates were in attendance from 15 countries. A steering committee was formed to plan a second international balance symposium tentatively scheduled to be hosted in the United Kingdom in 1998 or 1999. The Balance Symposium was followed bv the half-day, Workshop on Angle of Attack and Model Deformation on the afternoon of October 25. The thrust of the Workshop was to assess the state of the art in angle of attack (AoA) and model deformation measurement techniques and to discuss future developments.

  19. Comparative effectiveness of Di'ao Xin Xue Kang capsule and Compound Danshen tablet in patients with symptomatic chronic stable angina.

    PubMed

    Yu, Yanan; Hu, Siyuan; Li, Guoxin; Xue, Jie; Li, Zhuoming; Liu, Xiangling; Yang, Xiyan; Dong, Bo; Wang, Donghai; Wang, Xiaofeng; Liu, Shurong; Liu, Jun; Chen, Bingwei; Wang, Liying; Liu, Songshan; Chen, Qiguang; Shen, Chunti; Wang, Zhong; Wang, Yongyan

    2014-01-01

    A high proportion of patients with stable angina remains symptomatic despite multiple treatment options. Di'ao Xinxuekang (XXK) capsule and Compound Danshen (CDS) tablet have been approved for treating angina pectoris for more than 20 years in China. We compare the anti-anginal effectiveness of XXK capsule and CDS tablet in patients with symptomatic chronic stable angina. A randomized, multicenter, double-blind, parallel-group, superiority trial was conducted in 4 study sites. 733 patients with symptomatic chronic stable angina were included in the full analysis set. The primary outcomes were the proportion of patients who were angina-free and the proportion of patients with normal electrocardiogram (ECG) recordings during 20 weeks treatment. Compared with CDS, XXK significantly increased the proportion of angina-free patients, but no significant difference was noted in the proportion of patients with normal ECG recordings. Weekly angina frequency and nitroglycerin use were significantly reduced with XXK versus CDS at week 20. Moreover, XXK also improved the quality of life of angina patients as measured by the SAQ score and Xueyu Zheng (a type of TCM syndrome) score. We demonstrate that XXK capsule is more effective for attenuating anginal symptoms and improving quality of life in patients with symptomatic chronic stable angina, compared with CDS tablet. PMID:25394847

  20. 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.

  1. Separation, characterization and dose-effect relationship of the PPARgamma-activating bio-active constituents in the Chinese herb formulation 'San-Ao decoction'.

    PubMed

    Zhou, Ling; Tang, Yu-Ping; Gao, Lu; Fan, Xin-Sheng; Liu, Chun-Mei; Wu, De-Kang

    2009-01-01

    San-ao decoction (SAD), comprising Herba Ephedrae, Radix et Rhizoma Glycyrrhizae and Seneb Armeniacae Amarum, is one of the most popular traditional Chinese medicine (TCM) formulae for asthma. Peroxisome proliferator-activated receptors (PPARs) areey regulators of lipid and glucose metabolism and have become important therapeutic targets for various deseases, PPARgamma activation might exhibit anti-inflammatory properties in different chronic inflammatory processes. The EtOAc fraction of SAD showed a significant effect on PPARgamma activation. A simple and rapid method has been established for separation and characterization of the main compounds in the PPARgamma-activating fraction of SAD by ultra-fast HPLC coupled with quadropole time-of-flight mass pectrometry (UPLC-Q-TOF/MS). A total of 10 compounds were identified in the activating fraction of SAD, including amygdalin (1), liquiritin (2), 6'-acetyliquiritin (3), liquiritigenin (4), isoliquiritigenin (5), formononetin (6), licoisoflavanone (7), glycycoumarin (8), glycyrol (9) and uercetin (10). The results also characterized formononetin as a predominant component in this fraction. The dose-effect relationship comparison study of formononetin and the EtOAc fraction of SAD by adding formononetin was performed, the results suggested that formononetin was the major component of the EtOAc fraction of SAD responsible for activating PPARgamma, and the method will possibly be applied to study the complex biological active constituents of other TCMs. PMID:19924040

  2. Anais do Simposio Brasileiro de Geomatica, Presidente Prudente -SP, 9-13 de julho de 2002. p.452-457. EXTRAC ~AO DE REDES DE DRENAGEM A PARTIR DE MODELOS

    E-print Network

    Zhang, Richard "Hao"

    - Redes de drenagem possuem diversas aplicac¸~oes, tais como determinac¸~ao de ´areas com risco de eros atrav´es de uma grade regular de pontos, uma malha triangular irregular ou um mapa de contornos os dados a partir dos mapas topogr´aficos ou modelos de fotogrametria. Este trabalho apresenta um m

  3. 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

  4. 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.

  5. Using UPLC-QTOF-MS to analyze the chemical changes between traditional and dispensing granule decoctions of San-Ao-Tang.

    PubMed

    Ma, Chunhua; Qian, Yefei; Fan, Xinsheng; Shang, ErXin; Yao, Xin; Ma, Shiping

    2014-04-01

    In the present study, a chemical profiling approach based on ultra-performance liquid chromatography coupled with photodiode array detection and time-of-flight mass spectrometry (UPLC-PDA-TOF-MS) was proposed to rapidly evaluate the chemical consistency between traditional and dispensing granule decoctions of traditional medicine combinatorial formulae and validated using San-Ao-Tang (SAT) as a model combinatorial formula. SAT is an effective traditional Chinese medicine, which is usually used in treating asthma and other diseases of the respiratory system. Two decoctions were prepared: traditional decoction, which is a water extract of three mixed constituent herbs of SAT; and dispensing granule decoction, which is a mixed water extract of each individual herb of SAT. Batches of these two decoction samples were subjected to UPLC-PDA-TOF-MS analysis and the data sets of t(R)-m/z pairs, ion intensities and sample codes were processed with supervised orthogonal partial least squared discriminant analysis to holistically compare their differences. Once a clear classification trend was found in the score plot, further statistics were performed to generate points at the two ends of S, and the components that correlated to these ions were regarded as the most changed components during decoction of the combinatorial formula. The changed components were identified by comparing the mass/ultraviolet spectra and retention times with those of reference compounds and/or tentatively assigned by matching empirical molecular formulae with those of the known compounds published in the literature. Using the proposed approach, global chemical differences were found between traditional and dispensing granule decoctions, like ephedrine, pseudoephedrine, norpseudoephedrine, licorice saponine H2, licorice saponine G2 and amygdalin. PMID:23572319

  6. Application of 'Six Sigma{sup TM}' and 'Design of Experiment' for Cementation - Recipe Development for Evaporator Concentrate for NPP Ling AO, Phase II (China) - 12555

    SciTech Connect

    Fehrmann, Henning [Westinghouse Electric Germany GmbH (Germany); Perdue, Robert [Westinghouse Electric Company (United States)

    2012-07-01

    Cementation of radioactive waste is a common technology. The waste is mixed with cement and water and forms a stable, solid block. The physical properties like compression strength or low leach ability depends strongly on the cement recipe. Due to the fact that this waste cement mixture has to fulfill special requirements, a recipe development is necessary. The Six Sigma{sup TM}' DMAIC methodology, together with the Design of experiment (DoE) approach, was employed to optimize the process of a recipe development for cementation at the Ling Ao nuclear power plant (NPP) in China. The DMAIC offers a structured, systematical and traceable process to derive test parameters. The DoE test plans and statistical analysis is efficient regarding the amount of test runs and the benefit gain by getting a transfer function. A transfer function enables simulation which is useful to optimize the later process and being responsive to changes. The DoE method was successfully applied for developing a cementation recipe for both evaporator concentrate and resin waste in the plant. The key input parameters were determined, evaluated and the control of these parameters were included into the design. The applied Six Sigma{sup TM} tools can help to organize the thinking during the engineering process. Data are organized and clearly presented. Various variables can be limited to the most important ones. The Six Sigma{sup TM} tools help to make the thinking and decision process trace able. The tools can help to make data driven decisions (e.g. C and E Matrix). But the tools are not the only golden way. Results from scoring tools like the C and E Matrix need close review before using them. The DoE is an effective tool for generating test plans. DoE can be used with a small number of tests runs, but gives a valuable result from an engineering perspective in terms of a transfer function. The DoE prediction results, however, are only valid in the tested area. So a careful selection of input parameter and their limits for setting up a DoE is very important. An extrapolation of results is not recommended because the results are not reliable out of the tested area. (authors)

  7. Em comemorao ao Dia do Mdico (18/10) e a Semana Nacional do Livro e da Biblioteca (23/10 a 29/10) est sendo realizada na Biblioteca Setorial do CCS -

    E-print Network

    Floeter, Sergio Ricardo

    Em comemoração ao Dia do Médico (18/10) e a Semana Nacional do Livro e da Biblioteca (23/10 a 29/10) está sendo realizada na Biblioteca Setorial do CCS - Medicina a Exposição de livros e de Poesia de Poetry em inglês- já que é "a arte de empilhar livros de modo que seus títulos unidos formem um texto

  8. Comment on ``An enhanced polarization mechanism for the metal cations modified amorphous TiO2 based electrorheological materials'' by Qing Wu, Bin Yuan Zhao, Chen Fang and Ke Ao Hu

    NASA Astrophysics Data System (ADS)

    Lee, K.-H.; Park, B. J.; Choi, H. J.

    2006-12-01

    Comments on a recent article on an enhanced polarization mechanism for the metal cations modified amorphous TiO2 based electrorheological materials are presented, based upon an examination of the yield stress, which is a function of electric-field strength, of the materials. Using the deduced critical electric-field strengths, we find that the universal yield stress equation proposed collapses the data given by Qing Wu, Bin Yuan Zhao, Chen Fang, Ke Ao Hu, Eur. Phys. J. E 17, 63 (2005), onto a single curve.

  9. Projetos de Extenso de Ao Contnua

    E-print Network

    Maier, Rudolf Richard

    ­ DTE Decanato de Extensão ­ DEX #12;A divulgação científica da antropologia: consolidando a Série Antropologia, a Série Tradução e os Seminários Quinzenais do Departamento de Antropologia da UnB A escola

  10. Nanotecnologia farmacêutica aplicada ao tratamento da malária

    Microsoft Academic Search

    Lúcio Figueira Pimentel; Agenor Tavares Jácome Júnior; Vanessa Carla Furtado Mosqueira; Nereide Stela Santos-Magalhães

    2007-01-01

    Apesar do desenvolvimento tecnológico e científico, a malária permanece como um dos maiores problemas de saúde a serem combatidos. As estratégias modernas para o controle da doença prevêem ações conjuntas, como o combate do inseto vetor, diagnóstico rápido e preciso, garantia de terapêutica adequada, redução dos casos de resistência, além do desenvolvimento de novos agentes terapêuticos e vacina e através

  11. AO13 Aerosol sampling April 29, 2008

    E-print Network

    Oxford, University of

    in the atmosphere, for example- salt crystals, sand, ablated soils, and aviation derived black carbon soot, and is not limited by air traffic control regulations to the same extent. This project was inspired by such novel densities for black carbon soot particles are in the 105m-3 range. These typically consist of a chain

  12. 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 ...

  13. Inflection in the Ao dialect of Yoruba

    E-print Network

    Taiwo, Oye

    2011-10-03

    /tiyín ‘your(pl) vehicle’ (10) a. ìwé e tòun/tire?? ‘his book’ b. ìwé e tàw?n/tiw?n ‘their book’ Kansas Working Papers in Linguistics, Vol. 32 (2011), 84-105 89 The future tense marker also has different forms for affirmative and negative... olé tìe?? kí mò té uwe??. they beat thief the COMP I get there ‘They were beating the thief when I got there’. b. ??n?n ?m? jí í gwó...

  14. Cosmologia e Representa\\c{c}\\~ao

    E-print Network

    Ribeiro, Marcelo Byrro

    2013-01-01

    This work presents a brief and non-technical description of the main results and concepts of the modern scientific cosmology, viewing it from an epistemological perspective which allows a dialog with other modes of thinking like e.g. history, philosophy, sociology and religion. This epistemological viewpoint is based on the philosophical theses advanced by Ludwig Boltzmann (1844-1906) which states that scientific theories are nothing more than representations, or images, of nature (arXiv:physics/0701308v1). By being representations one cannot know how nature really is because the intrinsic and indispensable properties that characterize nature are unreachable by science. In other words, the true essences that constitute nature are unknowable. Therefore, all answers proposed by science are partial, simplified and replaceable. Another way of putting forward this viewpoint is to state that all scientific truths are provisional, a result which naturally leads to the conclusion that the same set of phenomena, or sc...

  15. Hyperspectral AO Observations of Solar System Objects

    Microsoft Academic Search

    J. J. Hillman; D. A. Glenar; G. Chin; N. J. Chanover; W. E. Blass; S. L. Mahan; M. Le Louarn

    1999-01-01

    We describe planetary science observations made with the Goddard Space Flight Center, acousto- optic tunable filter (AOTF) camera. This camera is a newly developed RF-tunable spectrophotometric imager with a spectral bandwidth of 25 cm-1 and a tuning range from0.5 to 1.0 micron. The observations that we report here were made at the Starfire Optical Range 1.5-meter laser-beacon adaptive optics telescope

  16. Universidade Tecnica de Lishoa Investiga~ao

    E-print Network

    a partir de quatro escolas ja existentes: a Escola Superior de Medicina Veterinaria (a ac tual Faculdade tor experimental de fusao em que participa todo 0 mundo Ocidental) e outros que cruzam a tecnologia '".... '"~ tricidade - e e, desde ja, «0primeiroexemploda globalizacao da ciencia e da tecnologia», atesta Carlos

  17. Introduc~ao `a Criptografia Paulo Mateus

    E-print Network

    Baia, Margarida

    , em grande parte devido `a omnipresen¸ca das aplica¸c~oes inform´aticas na sociedade moderna ­ com´ercio electr´onico, banca electr´onica, acesso remoto a servi¸cos do estado. Por outro lado, a criptografia

  18. Não ao sedentarismo, sim à saúde: contribuições da Educação Física escolar e dos esportes No to sedentarianism, yes to health: contributions of school physical education and sports No al sedentarismo, sí a la salud: contribuciones de la educación física en la escuela y de los deportes

    Microsoft Academic Search

    Ubiratan Silva Alves

    RESUMO: Um dos grandes problemas enfrentados pelos povos no mundo se refere ao sedentarismo. Associado a ele, a obesidade, as cardiopatias, a diabetes e tantas outras doenças aparecem com índices muito preocupantes principalmente nas populações de jovens em idade escolar. A tecnologia parece agravar mais ainda este quadro. Entretanto, a prática da atividade física regular, com orientação, com vestimenta e

  19. Genetic data on nine STRs (CSF1PO, TPOX, THO1, F13AO1, FESFPS, vWA, D16S539, D7S820 and D13S317) and two VNTRs (D1S80 and D17S5) in Rosario population, Santa Fe Argentine.

    PubMed

    Tenaglia, Mariano; Scollo, Adriana; Tripaldi, Regina; Grappiolo, Irene; Perichón, Armando M

    2004-05-10

    Allele frequencies for nine short tandem repeats (STRs) loci (CSF1PO, TPOX, THO1, F13AO1, FES/FPS, vWA, D16S539, D7S820 and D13S317) and two variable number tandem repeats (VNTRs) were obtained from a sample of 270 unrelated individuals born in the Rosario city, Santa Fe province of Argentina. PMID:15062960

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

    E-print Network

    requirements 1. INTRODUCTION Gemini North and Gemini South, two IR-optimized 8-m telescopes respectively sites. Providing funding is secured a 3 W continuous wave (CW) commercial dye laser will be the first

  1. Ministerio da Educac~ao Universidade Federal do Parana -UFPR

    E-print Network

    Paraná, Universidade Federal do

    . iv) Seja um valor pr´oprio de f. Mostre que ´e raiz de A e que o espa¸co pr´oprio para o valor pr e somente se, o polin^omio A tem n + 1 raizes reais e distintas. (5) Seja T um operador linear sobre

  2. Arvore Binaria de Busca Otima -Uma Implementac~ao Distribuida

    E-print Network

    Rodriguez, Noemi

    Monoticidade). Seja r a chave que ser´a a raiz da ´arvore ´otima do intervalo [i, j) e [i , j ) outro intervalo tal que i i j j com raiz ´otima r . Vale que r r . Com o primeiro resultado ´e f´acil construir

  3. AO assisted spectroscopy with SINFONI: PSF, background, and interpolation

    E-print Network

    R. Davies

    2007-03-02

    I discuss 3 widely applicable aspects concerning calibration of the near infrared adaptive optics integral field spectrometer SINFONI: (1) the accuracy with which one needs to quantify the PSF and how this might be achieved in practice; (2) how it is possible to fine tune the background subtraction to minimise the residual OH airglow; and (3) how an altered perspective on calibration data might lead to improvements in interpolation and greater flexibility in reconstructing datacubes.

  4. The Large Binocular Telescope's ARGOS ground-layer AO system

    NASA Astrophysics Data System (ADS)

    Hart, M.; Rabien, S.; Busoni, L.; Barl, L.; Bechmann, U.; Bonaglia, M.; Boose, Y.; Borelli, J.; Bluemchen, T.; Carbonaro, L.; Connot, C.; Deysenroth, M.; Davies, R.; Durney, O.; Elberich, M.; Ertl, T.; Esposito, S.; Gaessler, W.; Gasho, V.; Gemperlein, H.; Hubbard, P.; Kanneganti, S.; Kulas, M.; Newman, K.; Noenickx, J.; de Xivry, G.; Qirrenback, A.; Rademacher, M.; Schwab, C.; Storm, J.; Vaitheeswaran, V.; Weigelt, G.; Ziegleder, J.

    2011-09-01

    ARGOS, the laser-guided adaptive optics system for the Large Binocular Telescope (LBT), is now under construction at the telescope. By correcting atmospheric turbulence close to the telescope, the system is designed to deliver high resolution near infrared images over a field of 4 arc minute diameter. ARGOS is motivated by a successful prototype multi-laser guide star system on the 6.5 m MMT telescope, results from which are presented in this paper. At the LBT, each side of the twin 8.4 m aperture is being equipped with three Rayleigh laser guide stars derived from six 18 W pulsed green lasers and projected into two triangular constellations matching the size of the corrected field. The returning light is to be detected by wavefront sensors that are range gated within the seeinglimited depth of focus of the telescope. Wavefront correction will be introduced by the telescope’s deformable secondary mirrors driven on the basis of the average wavefront errors computed from the respective guide star constellation. Measured atmospheric turbulence profiles from the site lead us to expect that by compensating the ground-layer turbulence, ARGOS will deliver median image quality of about 0.2 arc sec in the near infrared bands. This will be exploited by a pair of multi-object near-IR spectrographs, LUCI1 and LUCI2, each with 4 arc minute field already operating on the telescope. In future, ARGOS will also feed two interferometric imaging instruments, the LBT Interferometer operating in the thermal infrared, and LINC-NIRVANA, operating at visible and near infrared wavelengths. Together, these instruments will offer very broad spectral coverage at the diffraction limit of the LBT’s combined aperture, 23 m in size.

  5. Extreme AO coronagraphy laboratory demonstration in the context of SPHERE

    NASA Astrophysics Data System (ADS)

    Martinez, P.; Aller Carpentier, E.; Kasper, M.

    2010-10-01

    The exoplanetary science through direct imaging and spectroscopy will largely expand with the very soon raise of new instruments at the VLT (SPHERE), Gemini (GPI), and Subaru (HiCIAO) observatories. All these ground-based adaptive optics instruments include extremely high performance adaptive optics (XAO) system, advanced starlight cancellation techniques (e.g. coronagraphy), and speckle calibration techniques (e.g. spectral, angular, or polarimetry). In this context we report laboratory results obtained with the High-Order Test bench (HOT), the adaptive optics facility at the European Southern Observatory headquarters. Under 0.5 arcsec dynamical seeing, efficiently corrected by an XAO system delivering H-band Strehl ratio above 90%, we discuss contrast levels obtained with an apodized pupil Lyot coronagraph using differential imaging techniques (spectral and polarimetric). Accounting for system differences (e.g. deformable mirror actuator number), we demonstrate a good agreement between experimental results and expectations for SPHERE, or GPI, while we already met HiCIAO contrast goals.

  6. 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.

  7. ALTAIR\\/NIRI AO Imaging of Volcanic Eruptions on Io

    Microsoft Academic Search

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

    2010-01-01

    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

  8. 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.

  9. 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

  10. Blazar AO 0235+164 brightens in optical

    NASA Astrophysics Data System (ADS)

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

    2014-08-01

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

  11. On a Problem of da Costa Jo~ao Marcos

    E-print Network

    Lisboa, Universidade Técnica de

    of the above conditions does not neces- sarily represent an inconvenient, as it paves the way for the proposal non-truth-functional valuations, were provided no earlier than 1977 (see [13, 20]). Doubting those

  12. instructions i 52-1308-00 Edition AO

    E-print Network

    Lebendiker, Mario

    containing 0.15% KathonTM CG/ICP Biocide #12;· p2 PD-10 Desalting Workmate and LabMate Buffer Reservoir PD-10 Biosciences Limited. Amersham and Amersham Biosciences are trademarks of Amersham plc. Kathon is a trademark

  13. AO01 Observations of the Karthala Eruption Candidate Number: 46162

    E-print Network

    Oxford, University of

    eruption plume of Karthala volcano, Grande Comore. Observa- tions were made every 30 minutes, and so concluded. 1 Introduction The Karthala volcano makes up a substan- tial part of the island of Grande Comore, 2008] to volcanology [Oppenheimer, 1998] and climate modelling [Robock, 2000]. The benefit

  14. Vacuum deposited optical coatings experiment (AO 138-4)

    NASA Technical Reports Server (NTRS)

    Charlier, Jean

    1991-01-01

    The aim of this experiment was to test the optical behavior of 20 components and coatings subjected to space exposure. Most of them are commonly used for their reflective or transmittive properties in spaceborne optics. They consist in several kind of metallic and dielectric mirrors designed for the 0.12 to 10 microns spectrum, UV, and NIR bandpass filters, visible, and IR antireflecting coatings, visible/IR dichroic beam splitters, and visible beam splitter. The coatings were deposited on various substrates such as glasses, germanium, magnesium fluoride, quartz, zinc selenide, and kanigened aluminum. Several coating materials were used such as Al, Ag, Au, MgF2, LaF3, ThF3, ThF4, SiO2, TiO2, ZrO2, Al2O3, MgO, Ge, and ZnSe. Five samples of each component were manufactured. Two flight samples were mounted in such a way that one was directly exposed to space and the other looking backwards. The same arrangement was used for the spare samples stored on ground in a box identical to the flight one and they were kept under vacuum during the LDEF mission. Finally, one set of reference components was stocked in a sealed box under a dry nitrogen atmosphere. By comparing the preflight and postflight optical performances of the five samples of each component, it is possible to detect the degradations due to the space exposure.

  15. Pushing the limits of NGSs solely AO: GMCAO and beyond

    NASA Astrophysics Data System (ADS)

    Ragazzoni, Roberto

    2014-07-01

    For almost two decades significant improvements have been made in the area of efficient WaveFront sensing to compensate areas in the sky of larger size and with better achieved quality. This has been accomplished in several directions, some of them become possible because of the development of new technologies, because of the availability of new kind of telescopes or because of the introduction of new concepts. While one of the currently favorite scenarios involve the so called Global MCAO, I will try to review these efforts placing them in perspective.

  16. 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

  17. Gene Transcription Profile of the Detached Retina (An AOS Thesis)

    PubMed Central

    Zacks, David N.

    2009-01-01

    Purpose: Separation of the neurosensory retina from the retinal pigment epithelium (RPE) yields many morphologic and functional consequences, including death of the photoreceptor cells, Müller cell hypertrophy, and inner retinal rewiring. Many of these changes are due to the separation-induced activation of specific genes. In this work, we define the gene transcription profile within the retina as a function of time after detachment. We also define the early activation of kinases that might be responsible for the detachment-induced changes in gene transcription. Methods: Separation of the retina from the RPE was induced in Brown-Norway rats by the injection of 1% hyaluronic acid into the subretinal space. Retinas were harvested at 1, 7, and 28 days after separation. Gene transcription profiles for each time point were determined using the Affymetrix Rat 230A gene microarray chip. Transcription levels in detached retinas were compared to those of nondetached retinas with the BRB-ArrayTools Version 3.6.0 using a random variance analysis of variance (ANOVA) model. Confirmation of the significant transcriptional changes for a subset of the genes was performed using microfluidic quantitative real-time polymerase chain reaction (qRT-PCR) assays. Kinase activation was explored using Western blot analysis to look for early phosphorylation of any of the 3 main families of mitogen-activated protein kinases (MAPK): the p38 family, the Janus kinase family, and the p42/p44 family. Results: Retinas separated from the RPE showed extensive alterations in their gene transcription profile. Many of these changes were initiated as early as 1 day after separation, with significant increases by 7 days. ANOVA analysis defined 144 genes that had significantly altered transcription levels as a function of time after separation when setting a false discovery rate at ?0.1. Confirmatory RT-PCR was performed on 51 of these 144 genes. Differential transcription detected on the microarray chip was confirmed by qRT-PCR for all 51 genes. Western blot analysis showed that the p42/p44 family of MAPK was phosphorylated within 2 hours of retinal-RPE separation. This phosphorylation was detachment-induced and could be inhibited by specific inhibitors of MAPK phosphorylation. Conclusions: Separation of the retina from the RPE induces significant alteration in the gene transcription profile within the retina. These profiles are not static, but change as a function of time after detachment. These gene transcription changes are preceded by the activation of the p42/p44 family of MAPK. This altered transcription may serve as the basis for many of the morphologic, biochemical, and functional changes seen within the detached retina. PMID:20126507

  18. Ingeniera en Sistemas de Computacin PRIMER AO PRIMER CUATRIMESTRE

    E-print Network

    Maguitman, Ana Gabriela

    Física II Análisis Matemático II Física I Análisis Matemático II Física I 7526 Arquitectura de Programación 5949 Sistemas Operativos Arquitectura de Computadoras para Ingeniería Organización de Computadoras Arquitectura de Computadoras para Ingeniería 2516 Análisis de Circuitos Eléctricos Física II Funciones de

  19. Regional cooperation in RWM in the AO countries.

    PubMed

    Ya-anant, Nanthavan; Thiangtrongjit, Sutat

    2011-07-01

    Regional cooperation in radioactive waste management (RWM) in the Asian and Oceanic countries has been successfully developing for more than 20 y. At present, the Asian and Oceanic countries recognise that there are several projects under the regional cooperation, such as the Forum for Nuclear Cooperation in Asia (FNCA), the Asian Nuclear Safety Network (ANSN) and the International Atomic Energy Agency (IAEA) regional projects. The FNCA on Radiation Safety and RWM is an effective mechanism for enhancing socio-economic development through active regional partnership in the peaceful and safe utilisation of nuclear technology. The ANSN Topical Group on RWM is established for exchanging, pooling, and sharing knowledge in the field of nuclear safety. For IAEA regional cooperation on RWM, such as IAEA-regional project RAS/3/009 Strengthening Infrastructure of RWM can provide and support Asian and Oceanic countries for national work plan, fellowships and scientific visits as well as expert services. PMID:21561940

  20. AGENDA PBLICA AO VI, N 11, Diciembre 2007-Enero 2008

    E-print Network

    Rapaport, Iván

    . Verónica Figueroa, sobre el multiculturalismo y las demandas del pueblo mapuche en Chile. El profesor espacio social de culturas e identidades diversas", cuestión que puede plantear a los Estados una serie de

  1. 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

  2. Liquid Nitrogen Cryotherapy for Surface Eye Disease (An AOS Thesis)

    PubMed Central

    Fraunfelder, Frederick Web

    2008-01-01

    Purpose To evaluate the effects of new treatments with liquid nitrogen cryotherapy on some external eye conditions. Methods In this retrospective case study, 6 separate series from a single tertiary care referral center practice are described. Liquid nitrogen cryotherapy was used to treat conjunctival amyloidosis, primary pterygia, recurrent pterygia, advancing wavelike epitheliopathy (AWLE), superior limbic keratoconjunctivitis (SLK), and palpebral vernal keratoconjunctivitis (VKC). The main outcome measure was the resolution of the disease process after treatment. Results Four patients with primary localized conjunctival amyloidosis were treated with liquid nitrogen cryotherapy. Two of them had recurrence of the amyloidosis, which cleared with subsequent treatment. Eighteen patients with primary pterygia had excision and cryotherapy with 1 recurrence. Of 6 subjects who presented with recurrent pterygia, 4 had a second recurrence after excision and cryotherapy. In 5 patients with AWLE, the condition resolved within 2 weeks without recurrence or the need for subsequent cryotherapy. Four patients with SLK were treated with liquid nitrogen cryotherapy. Disease recurred in 2 patients and 3 of 7 eyes, although subsequent cryotherapy eradicated SLK in all cases. Two patients and 3 eyelids with palpebral VKC were treated with liquid nitrogen cryotherapy. VKC recurred in all cases. Conclusions Liquid nitrogen cryotherapy to the surface of the eye is effective in treating AWLE, and SLK. Excision followed by cryotherapy is successful in treating conjunctival amyloidosis and primary pterygia Liquid nitrogen cryotherapy is unsuccessful in the treatment of recurrent pterygia and VKC. PMID:19277243

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

    E-print Network

    Rapaport, Iván

    LEY DE PRESUPUESTOS Rosanna Costa Introducción Finalmente, se aprobó la Ley de Presupuestos del año traspasar a la ley. Si bien este año el presupuesto aprobado tiene una diferencia respecto del que entró al Regla Fiscal de Balance Estructural, cada día más detallada, aunque el costo de ello es su menor

  4. 1. Introduo ao comportamento viscoelstico 2. Comportamento viscoelstico de fluidos

    E-print Network

    Loh, Watson

    . Instrumentos para análise reológica. 4. Comportamento reológico de dispersões 5. Comportamento reológico de Ricardo Picoli #12;Reologia - Instrumentos Viscosímetro Capilar Ref 3 Reologia de soluções de polímeros e surfatantes Ricardo Picoli #12;Reologia - Instrumentos Reômetro Placa- Cone. Placa - Placa. etc. Placa e cone

  5. Contrast analysis and stability on the ExAO testbed

    SciTech Connect

    Evans, J; Thomas, S; Gavel, D; Dillon, D; Macintosh, B

    2008-06-10

    High-contrast adaptive optics systems, such as those needed to image extrasolar planets, are known to require excellent wavefront control and diffraction suppression. The Laboratory for Adaptive Optics at UC Santa Cruz is investigating limits to high-contrast imaging in support of the Gemini Planet Imager. Previous contrast measurements were made with a simple single-opening prolate spheroid shaped pupil that produced a limited region of high-contrast, particularly when wavefront errors were corrected with the 1024-actuator Boston Micromachines MEMS deformable mirror currently in use on the testbed. A more sophisticated shaped pupil is now being used that has a much larger region of interest facilitating a better understanding of high-contrast measurements. In particular we examine the effect of heat sources in the testbed on PSF stability. We find that rms image motion scales as 0.02 {lambda}/D per watt when the heat source is near the pupil plane. As a result heat sources of greater than 5 watts should be avoided near pupil planes for GPI. The safest place to introduce heat is near a focal plane. Heat also can effect the standard deviation of the high-contrast region but in the final instrument other sources of error should be more significant.

  6. Regularisation in Sequential Learning Jo~ao FG de Freitas

    E-print Network

    Drummond, Tom

    Engineering Department Cambridge CB2 1PZ England jfgf@eng.cam.ac.uk [Corresponding author] Mahesan Niranjan Cambridge University Engineering Department Cambridge CB2 1PZ England niranjan@eng.cam.ac.uk Andrew H Gee representation: w k+1 = w k + d k (1) y k = g(w k ; t k ) + v k (2) where it has been assumed that the model

  7. Licenciatura en Ciencias de la Computacin PRIMER AO PRIMER CUATRIMESTRE

    E-print Network

    Maguitman, Ana Gabriela

    Aplicaciones de Web Diseño y Desarrollo de Software Redes de Computadoras Bases de Datos Diseño y Desarrollo de Proyectos de Software Diseño y Desarrollo de Software Diseño y Desarrollo de Software 5576 Compiladores e Ciencias de la Computación Sistemas Operativos y Distribuidos Bases de Datos 5587 Diseño y Desarrollo de

  8. Titan Imagery with Keck AO during and after Probe Entry

    SciTech Connect

    de Pater, I; Adamkovics, M; Bouchez, A H; Brown, M E; Gibbard, S G; Marchis, F; Roe, H G; Schaller, E L; Young, E

    2006-02-03

    We present adaptive optics data from the 10-m W.M. Keck telescope that were taken during the time the Huygens probe descended through Titan's atmosphere, and on the days following touch-down. The spatial resolution of the images is typically {approx}0.04-inch, or {approx}240 km on Titan (60 km/pixel). No probe entry signal was detected at levels exceeding 0.8 {micro}Jy (3-{sigma}) per pixel (0.01-inch), which although within the range of predicted flux levels, cannot constrain any models. We present data on Titan's surface, troposphere and stratosphere during the days following probe entry, when the solar phase angle varied from 0.05{sup o} up to 0.8{sup o}, with the Sun in the West. Contrary to expectation, the data often showed the East side to be brightest. Adding data obtained with Keck and Gemini over the past few years reveals that the East-West asymmetry can be explained by a combination of the solar phase angle effect together with a general preponderance of haze on Titan's East or morning hemisphere. The troposphere was characterized by quiescent weather; only a few small clouds were present near the south pole, at typical altitudes of 30-40 km. While stratospheric haze was prominent over the northern hemisphere, tropospheric haze dominated the south, from the S. pole up to latitudes of {approx} -45{sup o}. An intriguing observation is that obtained at 1.22 {micro}m, which revealed haze in the form of a collar at -60{sup o}, in contrast to the polar haze cap as usually seen. A comparison of narrow band JHK images of Titan's surface with that obtained by Cassini ISS shows a striking resemblance in small-scale features. After a decent attempt to remove the atmosphere from the images, the surface contrast between dark and bright areas may be larger at 2 {micro}m than at 1.6 and 1.3 {micro}m. If true, this could imply that the dark areas on Titan's surface are covered by a coarser grained frost than the bright areas, and/or that there are more absorbers, such as NH{sub 3}/NH{sub 4}SH frost, in these dark areas.

  9. 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

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

    E-print Network

    Chaimowicz, Luiz

    Andr´e Lima Gaspar Ruas , Mario Montenegro Campos , Luiz Chaimowicz Emails: algruas@gmail.com, mario sensores laser em ambientes internos. Experimentos foram conduzidos para grandes quantidades de part

  11. Study of cosmic dust particles on board LDEF: The FRECOPA experiments AO138-1 and AO138-2

    NASA Technical Reports Server (NTRS)

    Mandeville, J. C.; Borg, Janet

    1992-01-01

    Two experiments, within the French Cooperative Payload (FRECOPA) and devoted to the detection of cosmic dust, were flown on the LDEF. A variety of sensors and collecting devices have made possible the study of impact processes on materials of technological interest. Preliminary examination of hypervelocity impact features gives valuable data on size distribution and nature of interplanetary dust particles in low earth orbit, within the 0.5 to 300 micrometer size range. Most of the events detected on the trailing face of LDEF are expected to be the result of impacts of meteoritic particles only. So far, chemical analysis of craters by EDS clearly shows evidence of elements (Na, Mg, Si, S, Ca, and Fe) consistent with cosmic origin. Systematic occurrence of C and O in crater residues is an important result, to be compared with the existence of CHON particles detected in P-Halley comet nucleus. Crater size distribution is in good agreement with results from other dust experiments flown on LDEF. However, no crater smaller than 1.5 micron was observed, thus suggesting a cutoff in the near earth particle distribution. Possible origin and orbital evolution of micrometeoroids is discussed.

  12. Distributed Object Invocation in OBIWAN y Lu s Veiga Jo~ao Garcia Jo~ao Silva Paulo Ferreira

    E-print Network

    Ferreira, Paulo

    .e., across the Internet) and mobility (i.e., portable computers, webpads, personal digital assistants, smart), that are gaining enormous popu- larity; personal digital assistants (PDAs) is just one of them. The role

  13. Recuperac ¸ ˜ ao de Imagens da Web Utilizando M ´ ultiplas Evidˆ encias Textuais e Programac ¸ ˜ ao Gen´ etica

    Microsoft Academic Search

    Katia C. L. Santos; Humberto M. Almeida; Marcos A. Goncalves; S. Torres

    This paper describes an image retrieval framework that employs a evolutionary approach. The proposed framework explores Genetic Program­ ming for combining multiple textual sources of evidence associated to Web im­ ages. Experiments performed with a collection extracted from the Web formed by 1,223,829 pages and 254,495 images showed that the evolutionary frame­ work was able to overcome the Belief Networks

  14. The Interplanetary Network Supplement to the Fermi GBM Catalog - An AO-2 and AO-3 Guest Investigator Project

    NASA Technical Reports Server (NTRS)

    Hurley, K.; Briggs, M.; Connaughton, V.; Meegan, C.; von Kienlin, A.; Rau, A.; Zhang, X.; Golenetskii, S.; Aptekar, R.; Mazets, E.; Pal'shin, V.; Fredericks, D.; Barthelmy, S.; Cummings, J.; Gehrels, N.; Krimm, H. A.; Mitrofanov, I. G.; Golovin, D.; Litvak, M. L.; Sanin, A. B.; Boynton, W.; Fellows, C.; Harshman, K.; Starr, R.; Goldsten, J.

    2012-01-01

    In the first two years of operation of the Fermi GBM, the 9-spacecraft Interplanetary Network (IPN) detected 158 GBM bursts with one or two distant spacecraft, and triangulated them to annuli or error boxes. Combining the IPN and GBM localizations leads to error boxes which are up to 4 orders of magnitude smaller than those of the GBM alone. These localizations comprise the IPN supplement to the GBM catalog, and they support a wide range of scientific investigations.

  15. Supervised Pattern Classification Using Optimum-Path Forest Jo~ao Paulo Papa and Alexandre Xavier Falc~ao

    E-print Network

    Lewiner, Thomas (Thomas Lewiner)

    .joaopaulo,alexandre.falcao}@gmail.com Abstract We present a graph-based framework for pattern recog- nition, called Optimum-Path Forest (OPF in a graph derived from the data samples. The advan- tages in efficiency and/or accuracy over Artificial the machines. Another point is that, in all SVM approaches, the assumption of separabil- ity may also

  16. Learning about the Sky from the Environment: An Experience Working Along One Year with Students of Elementary Education. (Spanish Title: Aprendiendo sobre EL Cielo Desde el Entorno: Una Experiencia Trabajando Durante un Año Junto a Estudiantes del Primario.) Aprendendo sobre o Céu a Partir do Entorno: Uma Experiência de Trabalho ao Longo de um Ano com Alunos de Ensino Fundamental

    NASA Astrophysics Data System (ADS)

    Longhini, Marcos Daniel; Gomide, Hanny Angeles

    2014-12-01

    Research developed with 95 students of the 6th year of elementary education in a public school of Uberlândia, Minas Gerais. It was a continuous work from February to December 2013, which led the students to participate in activities of observation of the environment, specifically the sky, analyzing the changes occurred. We focused on the study of variations in temperature, rainfall, day length, variations in the size of the shadows and changes in the aspect of the Moon. Our focus of analysis targeted the discussion of the knowledge that these students had about the topics indicated and as they entered the stage during the implementation of the proposal. The results showed a limited perception that students have of their environment, however, lately expanded due to the undertaken activities, especially in relation to the Moon. Working with systematic measure procedures reveals the careful handling of data so that they become understandable to students, and working with the shadows points towards the students first understand how shadows are formed, and then apply this knowledge to Astronomy. Finally, we conclude that the lived process consisted of an initial step of a work that should be encouraged for the subsequent years of training of these students. Proyecto de investigación desarrollado con 95 alumnos del sexto año de primaria en una escuela pública de Uberlândia, Minas Gerais. Fue un trabajo continuo, de febrero a diciembre de 2013, que llevó a los estudiantes a participar en actividades de observación de su entorno, entre ellas, el cielo, analizando los cambios ocurridos. Nos centramos en el estudio de las variaciones en la temperatura, las precipitaciones, la duración del día, las variaciones en el tamaño de las sombras y los cambios en los aspectos de la Luna. Nuestro foco de análisis se centró en discutir el conocimiento que estos estudiantes tenían sobre los temas indicados al inicio y término de la propuesta. Los resultados mostraron una percepción limitada que los estudiantes tienen de su alrededor la cual, sin embargo, se expandió debido a las actividades llevadas a cabo, sobre todo en relación con la Luna. Trabajar con medidas sistemáticas revela el manejo cuidadoso de los datos para que sean comprensibles para los estudiantes, así como el trabajo con las sombras para que comprendan primero como se forman estas para después trabajarlas en Astronomía. Por último, llegamos a la conclusión de que el proceso desarrollado consistió en una etapa inicial de una obra que debe ser profundizado en los años posteriores de la formación de estos estudiantes. Projeto de pesquisa desenvolvido com 95 alunos do 6º ano do Ensino Fundamental de uma escola pública estadual de Uberlândia, Minas Gerais. Foi um trabalho contínuo, de fevereiro a dezembro de 2013, o qual levou os alunos a participarem de atividades de observação do entorno, dentre ele, o céu, analisando as mudanças ocorridas. Focamos no estudo das variações de temperaturas, chuvas, duração do dia, variações do tamanho das sombras e mudanças nos aspectos da Lua. Nosso foco de análise centrou-se em discutir os conhecimentos que os referidos alunos tinham acerca dos temas indicados no início e ao término da implementação da proposta. Os resultados mostraram a percepção limitada que os estudantes possuem de seu entorno, todavia, ampliada em função das atividades desenvolvidas, principalmente no que se refere à Lua. O trabalho com medidas sistemáticas revela o cuidado no tratamento dos dados para que eles se tornem compreensíveis aos alunos, assim como o trabalho com as sombras sinaliza para que os alunos primeiramente compreendam como as sombras são formadas para depois trabalhar isso em Astronomia. Por fim, concluímos que o processo vivido constituiu-se em uma etapa inicial de um trabalho que deve ser estimulado para os anos subsequentes da formação desses alunos.

  17. High speed photometry of faint Cataclysmic Variables: IV. V356 Aql, Aqr1, FIRST J1023+0038, Ha 0242-2802, GI Mon, AO Oct, V972 Oph, SDSS 0155+00, SDSS 0233+00, SDSS 1240-01, SDSS 1556-00, SDSS 2050-05, FH Ser

    E-print Network

    Patrick A. Woudt; Brian Warner; Magaretha L. Pretorius

    2004-03-18

    We present results from high speed photometry of a further thirteen faint cataclysmic variables. V356 Aql (Nova Aql 1936) shows flare-like outbursts with recurrence time scales ~ 3000 s, but no coherent periodicities. Aqr1 is an intermediate polar with a spin period of 6.7284 min and a probable orbital period P(orb) = 3.226 h derived from orbital sidebands. Its orbital sideband frequencies show very variable amplitudes. The published spectroscopic period of 2.0 h suggests that Aqr1 is similar to GW Lib and FS Aur in having an additional periodicity of unknown origin. FIRST J1023+0038 has P(orb) = 4.7548 h with an orbital modulation of range 0.45 mag, probably caused by reflection effect from a hot white dwarf primary; as such it may have been a nova sometime in the past few decades. Ha 0242 is a deeply eclipsing very low mass-transfer rate system, probably a dwarf nova of very long outburst interval, with P(orb) = 1.792 h. GI Mon, an old nova, has optical modulations at 4.325 h and possibly also at 48.6 min and is thus a candidate intermediate polar. AO Oct, an SU UMa type dwarf nova, shows orbital modulation at quiescence with P(orb) = 94.097 min. V972 Oph (Nova Ophiuchi 1957) showed no flickering activity during one set of observations, but did so at a later time, confirming the correctness of the identification of this object, but it shows no orbital modulation. SDSS 0155 is a deeply eclipsing polar with an orbital period of 87.13 min. SDSS 0233 shows flaring activity but no discernible periodicity. No periodicity was found in the new AM CVn candidate SDSS 1240. SDSS 1556 shows a periodic modulation at 1.778 h which is possibly due to orbital motion. SDSS 2050 is an eclipsing polar with P(orb) = 1.5702 h. FH Ser (Nova Serpentis 1970) has strong flickering activity but no detectable orbital modulation.

  18. 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

  19. Analysis of Mass Profiles and Cooling Flows of Bright, Early-Type Galaxies AO2, AO3 and Surface Brightness Profiles and Energetics of Intracluster Gas in Cool Galaxy Clusters AO3

    NASA Technical Reports Server (NTRS)

    White, Raymond E., III

    1998-01-01

    This final report uses ROSAT observations to analyze two different studies. These studies are: Analysis of Mass Profiles and Cooling Flows of Bright, Early-Type Galaxies; and Surface Brightness Profiles and Energetics of Intracluster Gas in Cool Galaxy Clusters.

  20. UNCORRECTED AO ios2a v.2007/11/07 Prn:24/08/2007; 8:49 F:ao038.tex; VTEX/Laima p. 1

    E-print Network

    Mizoguchi, Riichiro

    to say, the world is full of roles (e.g., wife, teacher, president, fuel, food, product, output, height of roles within an ontology development tool: Hozo Riichiro Mizoguchi, Eiichi Sunagawa, Kouji Kozaki to help developers create good ontologies. However, few of them can deal with roles adequately. Needless

  1. 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...

  2. 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

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

    E-print Network

    parametrization of a surface, which allows local mappings with small distortion. Texture atlas generation can maps that is suited to 3D photography. Projective texture atlas serves as a foundation for an attribute´ATICA PURA E APLICADA Variational Texture Atlas Construction and Applications por JONAS SOSSAI J ´UNIOR

  4. Triaxial ellipsoid dimensions and poles of asteroids from AO observations at the Keck-II telescope

    NASA Astrophysics Data System (ADS)

    Drummond, Jack; Christou, Julian; Nelson, Jerry

    2009-07-01

    Five main belt asteroids, 2 Pallas, 129 Antigone, 409 Aspasia, 532 Herculina, and 704 Interamnia were imaged with the adaptive optics system on the 10 m Keck-II telescope in the near infrared on one night, August 16, 2006. The three axis dimensions and rotational poles were determined for Pallas, Antigone, Aspasia, and Interamnia, from their changing apparent sizes and shapes as measured with parametric blind deconvolution. The rotational pole found for Interamnia is much different from all previous work, including our own at Lick Observatory the previous month. Although images of Herculina were obtained at only two rotational phases, its rotation appears to be opposite to that predicted from the lightcurve inversion model of M. Kaasalainen, J. Torppa, and J. Piironen [2002. Icarus 159, 369-395]. A search for satellites was made in all of the asteroid images, with negative results, but three trailing stars around Herculina (200 km diameter), down to 8.9 magnitudes fainter and between 1 and 115 asteroid radii (100 to 11,500 km) from the asteroid, establishes an upper limit of 3.3 km for any object with the same albedo near Herculina.

  5. arXiv:0708.1542v1 [nlin.AO] 11 Aug 2007

    E-print Network

    2007-08-11

    Aug 11, 2007 ... Predictability of extreme events in a branching diffusion model. Andrei Gabrielov ... k, 91.30.pd, 02.50.-r, 91.62. .... Let pk,i(G,y,t) be the conditional probability that at ... rate of change of the expectation density Ak(x,y,t) is af-.

  6. Status report on the Large Binocular Telescope's ARGOS ground-layer AO system

    NASA Astrophysics Data System (ADS)

    Hart, M.; Rabien, S.; Busoni, L.; Barl, L.; Beckmann, U.; Bonaglia, M.; Boose, Y.; Borelli, J. L.; Bluemchen, T.; Carbonaro, L.; Connot, C.; Deysenroth, M.; Davies, R.; Durney, O.; Elberich, M.; Ertl, T.; Esposito, S.; Gaessler, W.; Gasho, V.; Gemperlein, H.; Hubbard, P.; Kanneganti, S.; Kulas, M.; Newman, K.; Noenickx, J.; Orban de Xivry, G.; Peter, D.; Quirrenbach, A.; Rademacher, M.; Schwab, C.; Storm, J.; Vaitheeswaran, V.; Weigelt, G.; Ziegleder, J.

    2011-10-01

    ARGOS, the laser-guided adaptive optics system for the Large Binocular Telescope (LBT), is now under construction at the telescope. By correcting atmospheric turbulence close to the telescope, the system is designed to deliver high resolution near infrared images over a field of 4 arc minute diameter. Each side of the LBT is being equipped with three Rayleigh laser guide stars derived from six 18 W pulsed green lasers and projected into two triangular constellations matching the size of the corrected field. The returning light is to be detected by wavefront sensors that are range gated within the seeing-limited depth of focus of the telescope. Wavefront correction will be introduced by the telescope's deformable secondary mirrors driven on the basis of the average wavefront errors computed from the respective guide star constellation. Measured atmospheric turbulence profiles from the site lead us to expect that by compensating the ground-layer turbulence, ARGOS will deliver median image quality of about 0.2 arc sec across the JHK bands. This will be exploited by a pair of multi-object near-IR spectrographs, LUCIFER1 and LUCIFER2, with 4 arc minute field already operating on the telescope. In future, ARGOS will also feed two interferometric imaging instruments, the LBT Interferometer operating in the thermal infrared, and LINC-NIRVANA, operating at visible and near infrared wavelengths. Together, these instruments will offer very broad spectral coverage at the diffraction limit of the LBT's combined aperture, 23 m in size.

  7. Congreso Internacional 1810-2010: 200 aos de Iberoamrica -2113 TICA PBLICA Y TRANSPARENCIA

    E-print Network

    Paris-Sud XI, Université de

    acompaña a la condición humana y va forjando la conducta humana. Moral y ética hacen referencia por tanto aplicados en la conducta del hombre que desempeña una función pública»2 . Esta disciplina ofrece al servidor colectivo, como un proceso en el que tanto la colectividad como los individuos generan pautas de conducta

  8. Ley Nm. 284 del ao 1999 (P. del S. 1614)LEY 284,1999

    E-print Network

    Quirk, Gregory J.

    de tipificar como delito conducta constitutiva de acecho que induzca temor en el ánimo de una persona: actos que de por sí no constituyen conducta criminal. Sin embargo, estos actos unidos a intentos de constituir un patrón de conducta ilegal. El acecho, contra una persona puede ocurrir en una amplia variedad

  9. 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

  10. Soundness of Formal Encryption in the Presence of Pedro Ad~ao1

    E-print Network

    Lisboa, Universidade Técnica de

    ) security. We also show that soundness in the presence of key-cycles (and KDM security) nei- ther implies nor is implied by security against chosen ciphertext attack (CCA-2). Therefore, soundness for key-cycles is possible using a new notion of compu- tational security, not possible using previous such notions

  11. Resilient Detection in the Presence of Integrity Attacks Yilin Mo, Jo~ao Hespanha, Bruno Sinopoli

    E-print Network

    Hespanha, João Pedro

    - tructures susceptible to cyber security threats. The research community has acknowledged the importance Foundation and grant NGIT2009100109 from Northrop Grumman Information Technology Inc Cybersecurity Consortium by an attacker. For most of the paper, the measurement model is fairly general, as we simply assume that each

  12. Congreso Internacional 1810-2010: 200 aos de Iberoamrica -1817 EL AGUA Y ALGUNOS PROBLEMAS

    E-print Network

    Paris-Sud XI, Université de

    populación del planeta. Las reservas mundiales de agua dulce están restringidas a una parcela mínima de de agua dulce están restringidas a una parcela mínima de países o en pocos continentes (tabla 1 e 2

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

    E-print Network

    Lewiner, Thomas (Thomas Lewiner)

    Preliminares Jaime Henrique Ferreira de S´a Queiroz e Hemerson Pistori INOVISAO UCDB Campo Grande, Brasil, MS Biotecnologia UCDB Campo Grande, Brasil, MS portokra@ucdb.br,arroel@ucdb.br Resumo--Este artigo apresenta os resultados preliminares de um experimento com filtros de part´iculas para rastreamento de m´ultiplas larvas

  14. tel-01011379,version1-23Jun2014 Aos meus pais, pelo incentivo e confiana.

    E-print Network

    Boyer, Edmond

    descontraída de conduzir o projeto e pelo constante suporte às atividades de campo, viagens à Toulouse Condensés da Université Pierre-et-Marie-Curie (Paris) pelo suporte às atividades de campo, pela oportunidade Environnement Toulouse pela oportunidade de trabalhar nos experimentos envolvendo a adsorção do Fe na superfície

  15. 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.

  16. Full-field AO-assisted OCT for high-resolution tomographic imaging of the retina

    Microsoft Academic Search

    M. Glanc; D. Lafaille; P. Puget; F. Lacombe; L. Vabre; X. Levecq; N. Chateau

    2006-01-01

    Since the advent of Adaptive Optics in ophthalmic instrumentation, several attempts for improving the performances of the existing observing techniques, either in imaging or tomography, have been made. For long, Adaptive Optics have proven its ability to restore high lateral resolution with the SLO or flood imaging, or more recently to enhance the interferometric contrast and hence, the sensitivity, of

  17. Naturwissenschaftliche Fakultat Ao. Univ.Prof. Dipl.Ing. Dr. Helmut Mayer

    E-print Network

    Mayer, Helmut A.

    Allocation Optimization Die immer komplexer werdenden Abl¨aufe in betrieblichen Organisationen k¨onnen von mensch- lichen Planern kaum mehr ¨uberblickt und systematisch geplant werden. Dies macht den Einsatz von Softwaresystemen, die unter Einsatz von Methoden der K¨unstlichen Intelligenz Pl¨ane erstellen und optimieren

  18. GMT AO system requirements and error budgets in the preliminary design phase

    NASA Astrophysics Data System (ADS)

    Trancho, G.; Espeland, B.; Bouchez, A.; Conan, R.; Hinz, P.; van Dam, M.

    2012-07-01

    Error budgets are an indispensable tool for assuring that project requirements can be and are being met. An error budget will typically include terms associated with subsystems which are being designed by different teams of engineers, and fabricated by different vendors. It is a useful tool at all levels of design since it provides a means to negotiate design trades in the broadest possible context. Error budgeting is in many ways fundamental to the mission of systems engineering and of course to the overall project success. In this paper we will describe the GMT Adaptive Optics System flow down requirements and their integration with their wavefront error budgets. We will focus on the GMT Adaptive Optics wavefront error budgets for the following observing modes: Natural Guide Star Adaptive, Laser Tomography Adaptive Optics and Ground Layer Adaptive Optics. Finally, a description of the error budgets and the close link between the error budgets and other parameter such as sky coverage, zenith angle, etc., will be discussed in this paper.

  19. Delta XTE Spacecraft Solar Panel Deployment, Hangar AO at Cape Canaveral Air Station

    NASA Technical Reports Server (NTRS)

    1995-01-01

    The footage shows technicians in the clean room checking and adjusting the deployment mechanism of the solar panel for XTE spacecraft. Other scenes show several technicians making adjustments to software for deployment of the solar panels.

  20. Congreso Internacional 1810-2010: 200 aos de Iberoamrica -179 COMPROMISO Y APORTE DE

    E-print Network

    Boyer, Edmond

    A VENEZUELA Marisa Vannini de Gerulewicz Universidad Central Venezuela Desde comienzos del siglo XIX, contemporáneamente con el aparecer de los primeros movimientos independentistas, recrudeció en Venezuela la malaria o lugar desde 1808 hasta 1811, propagándose de una región central (Valles de Aragua) hacia una oriental

  1. Congreso Internacional 1810-2010: 200 aos de Iberoamrica -1991 EL GOBIERNO DE LUGO EN

    E-print Network

    Paris-Sud XI, Université de

    . Actualmente es profesor invitado en la Escuela de Sociología de la Universidad Central de Venezuela. #12: TRANSICIÓN, CAMBIO POLÍTICO Y NUEVA ECUACIÓN DEMOCRÁTICA1 Luis Miguel Uharte Pozas2* Universidad Central de Venezuela Venezuela El ensayo que vamos a presentar a continuación pretende realizar un análisis del actual

  2. Programs for Laser-AO Assisted Integral-Field Spectrometers on Ionized Flows

    E-print Network

    Cecil, Gerald

    (starburst galaxies) or by gas accretion (Herbig-Haro object [HHO] flows and AGN). I introduce some and even accelerations of individual gas clumps in the bow-shock and "jet" complexes. Many classical HHO-field spectrograph is becoming the most efficient tool with which to explore ionized gas outflows by mapping faint

  3. 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.

  4. La UA rinde homenaje a Julio Cortzar con la conmemoracin de los 50 aos de Rayuela

    E-print Network

    Escolano, Francisco

    infancia en Bánfiel y se graduó como maestro de escuela. Impartió clases en la Universidad de Cuyo aunque por las Universidades de Pittsburgh y Yale. Vivió en Barcelona (1971-73) como traductor y editor. Fue

  5. Congreso Internacional 1810-2010: 200 aos de Iberoamrica -2757 UNA MIRADA AL ENFOQUE DE

    E-print Network

    Paris-Sud XI, Université de

    control de calidad está prevista solo para 153 países, además del Programa Regional Centroamericano. Este Cooperación Española en lo últimos años, que busca garantizar una mayor calidad de la ayuda acorde con los y la calidad de la ayuda, durante el año 2010, la Cooperación Española se encuentra inmersa en un

  6. Congreso Internacional 1810-2010: 200 aos de Iberoamrica -1165 LA EMIGRACIN GALLEGA HACIA

    E-print Network

    Boyer, Edmond

    de Latinoamericanistas Españoles de la misma.1 La Guerra Civil española y la Segunda Guerra Mundial, para decaer durante la Primera Guerra Mundial y volver a aumentar tras el fin #12;1166 - XIV Encuentro BUENOS AIRES EN EL PERÍODO DE ENTREGUERRAS Y DE LA SEGUNDA POSGUERRA: UN ENFOQUE MUNICIPAL* Nadia Andrea

  7. Congreso Internacional 1810-2010: 200 aos de Iberoamrica -303 EN EL NOMBRE DE LA PATRIA

    E-print Network

    Paris-Sud XI, Université de

    : ASOCIACIONISMO Y NACIONALISMO EN LA ARGENTINA EN TORNO DE LA PRIMERA GUERRA MUNDIAL 1* María Inés Tato2 CONICET Guerra Mundial sobre la sociedad argentina: nacionalismo, ciudadanía y movilizaciones de masas. Una Latinoamericanistas Españoles Introducción Al estallido de la Primera Guerra Mundial, la Argentina experimentaba el

  8. Congreso Internacional 1810-2010: 200 aos de Iberoamrica -1945 CLAVES GEOPOLTICAS PARA

    E-print Network

    Paris-Sud XI, Université de

    económico, de su poder geopolítico y del resultado de la Segunda Guerra Mundial, habría empezado a entrar en siglo XIX y la estadounidense desde el fin de la Segunda Guerra Mundial hasta la crisis económica y es el intervalo que siempre sucede a una guerra mundial, en el que un Estado cuenta con una ventaja

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

    E-print Network

    Paris-Sud XI, Université de

    or superconducting applications. The fabrication of metal oxide ceramics with specific properties needs generally including sputtering, coevaporation, laser ablation... and the versatile class of methods represented=dipivalylmethanate; C11H1g02) have been used by several groups for in situ fabrication of HTS films by Metalorganic CVD

  10. First biological and dosimetric results of the free flyer biostack experiment AO015 on LDEF

    NASA Technical Reports Server (NTRS)

    Reitz, G.; Buecker, H.; Facius, R.; Horneck, G.; Schaeffer, M.; Schott, J. U.; Bayonove, J.; Beaujean, R.; Benton, E. V.; Delpoux, M.

    1991-01-01

    The main objectives of the Biostack Experiment are to study the effectiveness of the structured components of the cosmic radiation to bacterial spores, plant seeds, and animal cysts for a long duration spaceflight and to get dosimetric data such as particle fluences and spectra and total doses for the Long Duration Exposure Facility orbit. The configuration of the experiment packages allows the localization of the trajectory of the particles in each biological layer and to correlate the potential biological impairment or injury with the physical characteristics of the responsible particle. Although the Biostack Experiment was designed for a long duration flight of only nine months, most of the biological systems show a high hatching or germination rate. Some of the first observations are an increase of the mutation rate of embryonic lethals in the second generation of Arabidopsis seeds, somatic mutations, and a reduction of growth rates of corn plants and a reduction of life span of Artemia salina shrimps. The different passive detector systems are also in a good shape and give access to a proper dosimetric analysis. The results are summarized, and some aspects of future analysis are shown.

  11. AO18: Satellite tracking of volcanic eruption plumes using ash and Candidate number: 782932

    E-print Network

    Oxford, University of

    benefit. Although the negative effects are not as serious as those from ash, sulfur dioxide (SO2), which is also emitted in large amounts from volcanoes, can also have a detrimental effect on aircraft, leading could there- fore bring financial benefits to airlines. Accord- ing to the International Air Transport

  12. A.O. Boryssenko1) & D.H. Schaubert2) Antenna Laboratory

    E-print Network

    Southern California, University of

    of UWB Links Using Commercial EM Software Prototyping, Practical Design & Tests Optimal Driving Waveforms Optimal Termination Conditions Antenna-Signal Co-Design Antenna-Circuit Co-Design Meeting to Different Antenna (Free-Space Propagation is Removed) #12;10 Antenna-Circuit Co-Design for UW Link:: Optimal Antenna

  13. AO-12 Calibration Observations of GX 13+1 and RXJ 1856.5-3754

    NASA Astrophysics Data System (ADS)

    CXC Calibration

    2010-09-01

    The CXC calibration team has been working over the past year to improve the CC mode calibration of ACIS. This proposal contains a 10 ksec HETG/ACIS-S observation of GX 13+1 in CC-G mode. This observation will complement the existing TE and CC-F mode observations of this source and allow the calibration team to cross-calibrate between these three modes. This proposal also contains a 30 ksec LETG/ACIS-S observation of the isolated neutron star, RXJ 1856.5-3754, to measure the transmission of the ACIS contamination below the C-K edge.

  14. Rede Bayesiana aplicada ao monitoramento da Moratria da Soja Marcio Pupin Mello1

    E-print Network

    Hammerton, James

    sensing, soy moratorium, artificial intelligence, deforestation, Brazilian Amazon, sensoriamento remoto, 12227-010, Brasil {mello, adami, bernardo, daniel}@dsr.inpe.br Abstract. The Soy Moratorium is intended to reduce deforestation in the Brazilian Amazon. Its monitoring is supported by remote sensing satellite

  15. Acuerdo de Colaboracin ao 2012-2013Acuerdo de Colaboracin ao 2012-2013Acuerdo de Colaboracin ao 2012-2013Acuerdo de Colaboracin ao 2012-2013 Equipo de Meli Hotels International -Reservas y ConsultasEquipo de Meli Hotels International -Reservas y Consultas

    E-print Network

    Oro, Daniel

    .mail Exclusivo -----> kareservas@melia.com Es necesario indicar el código 208399208399208399208399 Internet ------------->Internet ------------->Internet ------------->Internet -------------> www.melia.com * Pinchando en la 44901 24 44 44901 24 44 44901 24 44 44 / e.mail: Grupos@melia.com CODIGO DE CLIENTE 208399CODIGO DE

  16. Matrcula en el Seminario de Orientacin para Mayores de 25 aos Curso 2013-14

    E-print Network

    Escolano, Francisco

    renovada y de última hora que facilita el acceso al Campus Virtual de la Universidad de Alicante, ayuden al Tarjeta de Identificación Universitaria (TIU) de la UA que te permitirá el acceso a las aulas de: Técnicas de Estudio (1ª Parte) Técnicas de Estudio (2ª Parte) e Introducción al manejo del Campus Virtual

  17. ltima Hora Seminario Orientacin para Mayores de 25 Aos NOTICIAS Y EVENTOS

    E-print Network

    Escolano, Francisco

    Alumnos/as para las sesiones del 14 al 28 de marzo (Publicada 10/03/2014) Importante: El aula común de la Primer Apellido y Aula del Aulario II de 16 a 19 horas: Aula Desde Hasta C02 A L C03 M Z 19.30 - 21.00 : Los alumnos que deseen asistir a la clase sobre el manejo del Campus Virtual deberán acudir a las

  18. 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,

  19. CBG: Geolocalizac ‚ ò ao na Internet usando medic ‚ ò oes de atraso

    Microsoft Academic Search

    Artur Ziviani; Bamba Gueye; Mark Crovella; Serge Fdida

    Geolocation of Internet hosts enables a diverse and interesting new class of location-aware applications. Previous measurement-based approaches use reference hosts, called landmarks, with a well-known geographic location to provide the location estimation of a target host. This leads to a discrete space of answers, limiting the number of possible location estimates to the number of adopted landmarks. In contrast, we

  20. NAOS, the first AO system of the VLT: on-sky performance

    Microsoft Academic Search

    Gerard Rousset; Francois Lacombe; Pascal Puget; Norbert N. Hubin; Eric Gendron; Thierry Fusco; Robin Arsenault; Julien Charton; Philippe Feautrier; Pierre Gigan; Pierre Y. Kern; Anne-Marie Lagrange; Pierre-Yves Madec; David Mouillet; Didier Rabaud; Patrick Rabou; Eric Stadler; Gerard Zins

    2003-01-01

    NAOS is the first adaptive optics system installed at the VLT 8m telescopes. It was designed, manufactured and tested by a french Consortium under an ESO contract, to provide compensated images to the high angular resolution IR spectro-imaging camera (CONICA) in the 1 to 5 mum spectral range. It is equipped with a 185 actuator deformable mirror, a tip\\/tilt mirror

  1. DENSIDADE BÁSICA DE MADEIRA DE Eucalyptus grandis HILL EX MAIDEN, AOS 3 ANOS DE IDADE

    Microsoft Academic Search

    Maria Aparecida; Mourão Brasil; Amaral Mello

    SUMMARY The wood specific gravity, at DBH level, of three years old Eucalyptus grandis Hill ex Maiden plantations established with Coff's Harbour - Australia seeds, was studied. The plantations were located in Mogi Guaçú (22°11'S latitude, 47°07'W longitude, 580 m altitude) and Itupeva (23°09'S latitude, 47°03'W longitude) - São Paulo State. From the analysis of the results the following conclusions

  2. Introduccin a la Estadstica Exmenes de aos anteriores TEMA 6: Variables aleatorias

    E-print Network

    Gil, Ana Arribas

    continua X es de la forma: [ ]1,1)()( 3 --+== tctbtatXPtF Se sabe que la densidad verifica f(-1)=f(1)=0. a) Enunciar las propiedades de la función de densidad y de la función de distribución b) Determinar a, b y c variable aleatoria X con función de densidad: = contrariocasoen0 153 108)( x x xf X a) Calcular la

  3. Congreso Internacional 1810-2010: 200 aos de Iberoamrica -365 CUESTIONES ESPAOLAS EN LA

    E-print Network

    Paris-Sud XI, Université de

    investigación HAR2009-11081, financiado por el Ministerio de Ciencia e Innovación. 2. Salvador Bernabeu Albert magnificado y repleto -salvo contadas excepciones4 - de exaltaciones hagiográficas. Esto se percibe, por

  4. 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...

  5. 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

  6. Flexible and Expressive Composition Rules with Aspect-oriented Use Case Maps (AoUCM)

    Microsoft Academic Search

    Gunter Mussbacher; Daniel Amyot; Jon Whittle; Michael Weiss

    Technologies based on aspect-orientation and multi-dimensional separation of concerns have given software engineers tools\\u000a to better encapsulate concerns throughout the software lifecycle. Separated concerns must be composed, even during early lifecycle\\u000a phases, to obtain an overall system understanding. Concern composition languages therefore must be expressive, scalable, and\\u000a intuitive. Otherwise, gains achieved by concern separation are offset by the complexity of

  7. 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

  8. ON THE GENERALIZATION OF AR PROCESSES TO RIEMANNIAN MANIFOLDS Jo~ao Xavier

    E-print Network

    Instituto de Sistemas e Robotica

    -direction studies in me- teorology and the estimation of relative rotations of tectonic plates based on observations-circle, spherical data arises when examining relative rotations of Earth's tectonic plates, etc. See [1, 2, 3, 4

  9. "Assurance of Learning (AoL) Methods Just Have to Be Good Enough"

    ERIC Educational Resources Information Center

    Journal of Education for Business, 2007

    2007-01-01

    Kathryn Martell (PhD, University of Maryland; BA, University of Chicago) is Associate Dean of the School of Business and Professor of Management at Montclair State University. Prior to 2002, she was Associate Dean for Academic Affairs at the School of Business at Southern Illinois University at Edwardsville (1999-2002). Since the new accreditation…

  10. OFERTA DE CONTRATO DE 4 AOS PARA REALIZAR LA TESIS DOCTORAL

    E-print Network

    Autonoma de Madrid, Universidad

    máster en ingeniería, neurociencias, ciencias biológicas, físicas, o en disciplinas relacionadas en el 2010. Se valorará la experiencia previa en electrofisiología, EEG, neuroimagen o en neurociencia

  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. Migrac ¸ ˜ ao de um kernel de tempo real para um processador digital de sinais

    Microsoft Academic Search

    Augusto M. Nacif; Luiz Fernando; E. Moreira; Iabrudi Tavares; Monteiro da Mata; Claudionor Nunes Coelho Jr; Luiz Filipe Vieira; Marcos Augusto Vieira

    Considering the complexity growth on signal processing applications and the performance of newest generation digital signal processors the use of small kernels for the signal processing domain becomes common. The use of an operating system facilitates the organization and management of application tasks. This work describes the porting process of a real time kernel to a DSP. The ported kernel

  13. COMUNICA» C~ AO ETHERNET EM TEMPO-REAL PARA UMA REDE DE MICROCONTROLADORES

    Microsoft Academic Search

    Andrey E. M. Brito; Francisco V. Brasileiro; Carlos Eduardo Leite

    Abstract| Ethernet is well-known as the standard information network, additionally, its use in control and industrial networks has also recently grown. However, these control networks usually have stronger time require- ments that may be compromised by Ethernet low-level behavior, for example, nondeterministic retransmissions in case of message collisions. This papers proposes an approach to allow real-time communication through Eth- ernet

  14. AO ETHERNET EM TEMPO-REAL PARA UMA REDE DE MICROCONTROLADORES

    Microsoft Academic Search

    Andrey E. M. Brito; Francisco V. Brasileiro; Carlos Eduardo Leite

    Ethernet is well-known as the standard information network, additionally, its use in control and industrial networks has also recently grown. However, these control networks usually have stronger time require- ments that may be compromised by Ethernet low-level behavior, for example, nondeterministic retransmissions in case of message collisions. This papers proposes an approach to allow real-time communication through Eth- ernet networks

  15. J. Phys II France 1 (1991) 931-937 Ao0T 1991, PAGE 931 Classification

    E-print Network

    Boyer, Edmond

    because the surface tension y is small compared to pb, Where p is a shear modulus and b the Burgers vectorb . z - z' 4D z-~D (Ai~2)~A2b . z - -t 4D Fig. I. Burgers vectors and posiuons of the first five dislocation of Burgers vector b at z = z' Coordinates x, z are also displayed The total energy W of the sample

  16. INTEGRAÇÃO DA APRENDIZAGEM EMOCIONAL AO PROCESSO DE LIDERANÇA SITUACIONAL - UMA PROPOSTA HOLÍSTICA E HUMANÍSTICA

    Microsoft Academic Search

    Jari Domingues; Chames Maria; S. Gariba; Bruno Hartmut Kopittke

    This article has the aim of proposing the integration to the leadership styles, defined by the situational leadership, the emotional learming that competences and abilities which may allow the leader a better perception of him\\/herself as well as the athers', inside a new paradigm of holistic management. This challenge, therefore, goes through the redirection of the leader's attitude before the

  17. Sueni de Souza Arouca Metodo implicito para reconstruc~ao de curvas

    E-print Network

    ´e Eugenio Leal Coordenador Setorial do Centro T´ecnico Cient´ifico -- PUC­Rio Rio de Janeiro, 13 de Licenciatura em Matem´atica na Universidade do Estado do Rio de Janeiro ­ UERJ (Rio de Janeiro, Brasil). Ficha Pacheco R. Velho. -- Rio de Janeiro : PUC­Rio, Departamento de Matem´atica, 2006. v., 64 f: il. ; 29,7 cm

  18. Thales Miranda de Almeida Vieira Galerias Inteligentes e otimizac~ao de

    E-print Network

    . Luiz Velho Rio de Janeiro Janeiro de 2010 #12;Thales Miranda de Almeida Vieira Galerias Inteligentes e Coordenador do Centro T´ecnico Cient´ifico -- PUC­Rio Rio de Janeiro, 15 de Janeiro de 2010 #12;Todos os; orienta- dor: Thomas Lewiner; co­orientadores: Adelailson Peixoto, Luiz Velho. -- Rio de Janeiro : PUC­Rio

  19. Congreso Internacional 1810-2010: 200 aos de Iberoamrica -1641 LA IMAGEN DEL PROCESO

    E-print Network

    Paris-Sud XI, Université de

    a raíz de las declaraciones radiofónicas de Portell Vilá en Radio Habana, en las que expresaba su sentir internacional siendo un referente para Iberoamérica como origen, causa y sustentante del ideal de Hispanidad

  20. Congreso Internacional 1810-2010: 200 aos de Iberoamrica -2737 LAS MUJERES CON DISCAPACIDAD

    E-print Network

    Paris-Sud XI, Université de

    categorías como por ejemplo, la raza, etnia, orientación sexual, origen nacional o el estrato socioeconómico en nuestra televisión como en la radio, como en las calles, estas personas parten de un grupo «menos

  1. Uma perspectiva orientada ao território para o local e-government

    Microsoft Academic Search

    Luis Manuel Borges Gouveia

    2007-01-01

    1. INTRODUÇÃO O início do século XXI é marcado de forma indelével pelas Tecnologias de Informação e Comunicação. A vulgarização do computador e, mais recentemente da Internet, tornaram a sua influência nas mais variadas actividades humanas um factor quase constante. A crescente utilização do computador e da Internet leva a que uma quantidade cada vez maior da informação produzida esteja

  2. Do ato motor ao ato de amor: Convite à Investigação do Transtorno Déficit Atenção Hiperatividade

    Microsoft Academic Search

    Carmem Aristimunha de Oliveira; Maria José Pimenta Faria

    The present study aims at checking the perception of the corporal image by children who are bearers of TDAH. In an attempt of understanding the referred disturb, the nowadays most reliable authors were researched, and they present the theory that, along with the bearers, the family and the environment live in constant stress showing that different fields of study should

  3. Chemo-Kinematic Survey of z ~ 1 Star Forming Galaxies using Keck OSIRIS LGS-AO

    NASA Astrophysics Data System (ADS)

    Mieda, Etsuko; Wright, Shelley A.; Larkin, James E.; Armus, Lee; Juneau, Stephanie

    2015-02-01

    We present first results from the Intermediate Redshift OSIRIS Chemo-Kinematic Survey (IROCKS) of z ~ 1 star forming galaxies (Mieda et al. in prep). We have targeted H? and [NII] emission lines in J-band and have spatially resolved the galaxies at sub-kilo parsec scale. We have combined our sample with deep HST continuum images, and are able to reveal the dynamics, morphologies, metallicity distribution, emission-line diagnostics, and star formation rates of galaxies spanning this crucial z ~ 1 epoch.

  4. AoDI: an allocation-on-demand incremental volume based on LVM

    Microsoft Academic Search

    Rui Cao; Caijun Zhen; Yan Gao; Guangzhi Xu; Xiaoguang Liu; Gang Wang; Guangjun Xie

    2011-01-01

    Cloud computing has become one of the hottest topics in both academia and industry. In cloud computing, virtualization is the fundamental technology, and the resource management is the key issue. Storage, an important resource, traditionally is allocated to users according to users' predictions, so may cause bad space utilization because of overprovisioning or underprovisioning. Dynamic adjusting is difficult because of

  5. CADERNOS DE COMPUTAC ~AO XX (2003) Learning with Skewed Class Distributions

    E-print Network

    Batista, Gustavo

    rate (about 1%) for most marketing campaigns. Other examples of domains with intrinsic imbalance can claims in any given time period. Also, in direct marketing [11], it is com- mon to have a small response that accurately classifies the minority class under such situation. Frequently, the clas- sifier has a good

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

    E-print Network

    Iye, Masanori

    , cleanliness and probably humidity inside the laser room by using the clean booth unit. The main components the laser room to insulate the laser system with the dome environment. We will control the temperature monitors the laser output power, wavelength, spectral bandwidth, transverse beam modes, polarization

  7. Si Ris6 Report No. 220 fiR.0--3ao

    E-print Network

    and Radlocaasium in Danish Food in 1 9t» I I 5.1. &TZfOj^ 54 5.8.3. Sr-90 in Drinking Water 57 5.8.4. Sr-90 and Cs-1 37 in Imported Foods and Danish Eggs 57 5. Strontium-90 and Caesium-1 37 in Man in 1989 63 6.1. Sr-90_m_Human_Bone 63 6. 2. Cs^J3J_in tteJHuman J3ody

  8. Congreso Internacional 1810-2010: 200 aos de Iberoamrica -2073 INSTITUCIONALIZACION DE

    E-print Network

    Paris-Sud XI, Université de

    INSTRUMENTOS ÉTICOS: UN DIQUE A LA CORRUPCION POLÍTICA EN AMERICA LATINA Oscar Diego Bautista UNAM México Los institucionalización de un modelo que agrupa diversos instrumentos éticos integrados en un Sistema Ético Integral (SEI

  9. Textos de Apoio ao Professor de Fsica, v. 16 n. 2, 2005. Instituto de Fsica UFRGS

    E-print Network

    dos Santos, C.A.

    SILVA, LUCIA FORGIARINI DA O microcomputador como instrumento de medida no laboratório didático da de Computador. 2. Instrumentos de Medida. 3. Ensino Médio. I. Veit, Eliane Angela. ll. Universidade atividades desenvolvidas em sala de aula com instrumentos e técnicas atuais, utilizadas no quotidiano do

  10. Congreso Internacional 1810-2010: 200 aos de Iberoamrica -3059 CONVERGENCIA REAL EN

    E-print Network

    Paris-Sud XI, Université de

    análisis y el estudio de los instrumentos jurídicos e institucionales de la integración. Estos instrumentos regionales ni instrumentos de redistribución fiscal tendentes a favorecer el crecimiento económico de los, 2007; Vázquez, 2007). Y dado que Centroamérica carece de instrumentos de integración positiva, todo

  11. Ku I Ke Ao: Hawaiian Cultural Identity and Student Progress at Kamehameha Elementary School

    ERIC Educational Resources Information Center

    Stender, Robert Holoua

    2010-01-01

    The relationship between Hawaiian cultural identity and student progress at Kamehameha Elementary School (KES) is the focal point of this study. As the student demographics continue to evolve at Kamehameha Schools, most recently with increasing numbers of children coming from orphan and indigent backgrounds, teachers want greater understanding of…

  12. [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

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

    E-print Network

    the Doppler-shift of spectral lines with a precision of better than 3 m s-1 . 2, 3 Since then, the discovery These measurements and associated survey work have transformed our view of the solar neighborhood. It is full

  14. Resilient Detection in the Presence of Integrity Attacks , Jo~ao Hespanha

    E-print Network

    Hespanha, João Pedro

    measurements. Supervisory Control And Data Acquisition (SCADA) systems, for example, run a wide range of safety-ever SCADA system malware (called Stuxnet) was found in July 2010 and rose significant concern about SCADA system security [1], [2]. While SCADA systems are currently mostly isolated, next generation SCADA

  15. Agentes de Software para auxiliar ao Professor na busca de Contedos Educacionais no Padro IMS

    E-print Network

    Endler, Markus

    educacionais utilizou-se a tecnologia de agentes de software. O uso desta tecnologia [1], se apresenta como uma mais influenciados por tecnologias como Internet, Inteligência Artificial e Ferramentas de Busca na Web Seção 2, é resumida a Tecnologia de Agentes. Na Seção 3, destaca-se as Ferramentas de Tecnologia de

  16. Lesão medular associada ao manejo incorreto de caprino Medular lesion associated to caprine management

    Microsoft Academic Search

    Fernanda Moraes Cardoso; Pedro Miguel Ocampos Pedroso; Adriana da Silva Santos; Marcele Sousa Vilanova; David Driemeier; Verônica Schmidt

    2009-01-01

    Práticas inadequadas de manejo atuam como fatores predisponentes a quadros clínico-patológicos em caprinos, destacando-se as falhas nutricionais e erros de amochamento e casqueamento. No presente relato, apresenta-se um caso de traumatismo medular na região cervical em caprino Saanen de quatro anos de idade, mantido em regime de confinamento. Segundo história clínica obtida com o tratador, o caprino se apresentou disposto

  17. Congreso Internacional 1810-2010: 200 aos de Iberoamrica -469 POBLAMIENTO TARDO O

    E-print Network

    Paris-Sud XI, Université de

    Congreso Internacional 1810-2010: 200 años de Iberoamérica - 469 POBLAMIENTO TARDÍO O PRIMERA del libre comercio -en particular durante la paz con Inglaterra al inicio del siglo XIX el comercio local, y la facilidad en el transporte entre los puertos de la península y Montevideo

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

    E-print Network

    Boyer, Edmond

    Congreso Internacional 1810-2010: 200 años de Iberoamérica - 509 DESARROLLO TEXTIL EN LA CIUDAD DE Nueva España. En el caso concreto de Cataluña y su relación con el comercio americano el historiador nuevos emigrantes, unidos por vínculos familiares o de afinidad.1 El comercio americano por parte de

  19. Distribuição de peso molecular em poliolefinas: contribuição ao estudo da bimodalidade e da desconvolução

    Microsoft Academic Search

    Montserrat Fortuny; Márcio Nele; Príamo A. Melo; José Carlos Pinto

    2004-01-01

    The deconvolution of molecular weight distributions (MWD) may be useful to obtain information about the polymerization kinetics and properties of catalytic systems. However, deconvolution techniques are normally based on steady-state assumptions and very little has been reported about the use of non-stationary approaches for deconvolution of MWDs. In spite of that, polymerization reactions are often performed in batch or semi-batch

  20. Forschung mhh Info August/September 2003 Die AO-Research Fund (Stiftung der Arbeitsgemeinschaft fr

    E-print Network

    Manstein, Dietmar J.

    on the management of femur fractures). Das Bundesministerium für Bildung und Forschung (BMBF), Bonn, bewilligte of shaft fractures of the lower extremity of polytrauma patients« (European polytrauma study

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

    E-print Network

    Jesus, Sérgio M.

    during INTIFANTE'00: passive data 19 3.1 Ship-noise track: event 6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 3.1.1 Environmental model . . . . . . . . . . . . . . . . . . . . . . . . . . 20 3.1.2 Ship radiated noise . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 3.2 Inversion results without

  2. Relacionamentos Externos no âmbito da Inovação Empresarial: Modelo aplicado aos avanços inovadores

    Microsoft Academic Search

    Maria José Madeira Silva; Mário Lino Barata Raposo; Maria Eugénia Ferrão; Juan José Jiménez Moreno

    2005-01-01

    A inovação assume-se cada vez mais como um factor chave da competitividade empresarial. Várias abordagens teóricas, desenvolvidas nos últimos anos, sustentam que a inovação não é algo que resulta da acção isolada de um único actor, mas é vista como um processo não linear, complexo, evolucionário e interactivo entre a empresas e o seu meio envolvente. Esta investigação tem por

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

    E-print Network

    Oxford, University of

    Eyjafjallaj¨okull in April 2010 has led to huge problems, causing 200 million dollars of losses a day (Wearden lost their engines and were forced to land (Casadevall, 1994). The eruption of Ice- landic volcano, 2010). The increas- ing number of incidents led to the creation of nine Volcanic Ash Advisory Centers

  4. Mapeamento através da Imagem Multiespectral Daedalus ATM integrada ao Laser Scanner

    Microsoft Academic Search

    Vivian de Oliveira Fernandes

    2009-01-01

    In this article an analysis of the mapping through the Daedalus ATM image with 2m of resolution will be presented. In the mapping procedure the Digital Monoplotting System - SMD and MDT gotten through the TopoSys Laser Scanner was used. The SMD possesss a module that allows to adjust the plain projective transformation, aiming at the rectification of vectorial entities

  5. Non-common path aberration corrections for current and future AO systems

    NASA Astrophysics Data System (ADS)

    Lamb, Masen; Andersen, David R.; Véran, Jean-Pierre; Correia, Carlos; Herriot, Glen; Rosensteiner, Matthias; Fiege, Jason

    2014-07-01

    We explore two methods of quantifying and correcting non-common path aberrations (NCPA) both in simulation and on an experimental bench. The first method, called Focal Plane Sharpening (FPS), utilizes an optimization algorithm to maximize the peak intensity of the PSF by varying actuator patterns on a deformable mirror (DM). The second method employs the technique of Phase Diversity (PD) to estimate NCPA by use of PSF images in and out of the focal plane. The experimental tests use a 52 actuator ALPAO DM and 1000 actuator MEMS DM to provide an offset for NCPA correction. Each method shows to be successful in simulation, however FPS is the only method used successfully on an experimental bench; although work is on-going to successfully demonstrate PD. Our aim is to use one or both methods to determine the best approach to NCPA calibration on the MOAO system RAVEN, and extend this calibration method to future systems such as TMT's NFIRAOS.

  6. SISTEMAS DE INFORMAÇÃO NO ATENDIMENTO AO TRAUMA: ANÁLISE DA SITUAÇÃO ATUAL EM CURITIBA

    Microsoft Academic Search

    Ubaldino da Rosa; Ferreira Filho; Sandra Honorato da Silva; Raquel Kolitski Stasiu

    3 Professora do programa de Pós-Graduação - Mestrado em Tecnologia da Saúde da PUCPR, Resumo - Nos estudos epidemiológicos o trauma é a principal causa de morte nas quatro primeiras décadas de vida e responsável pela perda de mais anos de vida produtiva, quando comparado à doença cardíaca e o câncer combinados. A informação e a comunicação têm um papel

  7. 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

  8. 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.

    .** P P O. tolmiei Neg. P P Wilsonia citrina Pos. P P W. pusilla Neg.** P P O P P Passerina cyanea Neg. pensylvanica, D. coronata, D. palmarum, Mniotilta varia, Geothlypis trichis, Icteria virens, and Spizella

  9. JOURNAL DE PHYSIQUE Colloque C5, suppl6ment au no 8, Tome 47, aoOt 1986

    E-print Network

    Paris-Sud XI, Université de

    . A survey of an image processing system is given. Image analysis is the main aim in astronomical of image have to be processed such as those occurring in direct photography, spectrography, interferograms

  10. Resumo da resoluc~ao.do exame de 15 Julho 2002 I.1a) Temos f(x) = x2

    E-print Network

    Baia, Margarida

    escolher um intervalo negativo que inclua -1 e a raiz, por exemplo J = [-1, -0.5] : · f(-1)f(-0.5) = 0(x) > 0. · f(-1)f (x) > 0 x J. Conclui-se que o m´etodo Newton converge para a ´unica raiz negativa w J.5 concluiriamos que o m´etodo Newton converge para essa raiz negativa qualquer que fosse x0 J, em particular com

  11. 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.

  12. puesta en prctica del proyecto o trabajo ganador. No obstante, durante un ao desde la fecha de entrega del

    E-print Network

    dirección anteriormente indicada. · Explicación cualitativa y/o cuantitativa de los avances, beneficios y investigaciones que no hayan sido objeto de transacción comercial y que supongan un avance o un progreso

  13. Analysis of LDEF experiment AO187-2: Chemically and isotopic measurements of micrometeoroids by secondary ion mass spectrometry

    NASA Technical Reports Server (NTRS)

    1992-01-01

    Numerous 'extended impacts' found in both leading and trailing edge capture cells have been successfully analyzed for the chemical composition of projectile residues by secondary ion mass spectrometry (SIMS). Most data have been obtained from the trailing edge cells where 45 of 58 impacts have been classified as 'probably natural' and the remainder as 'possibly man-made debris.' This is in striking contrast to leading edge cells where 9 of 11 impacts so far measured are definitely classified as orbital debris. Although all the leading edge cells had lost their plastic entrance foils during flight, the rate of foil failure was similar to that of the trailing edge cells, 10 percent of which were recovered intact. Ultra-violet embrittlement is suspected as the major cause of failure on both leading and trailing edges. The major impediment to the accurate determination of projectile chemistry is the fractionation of volatile and refractory elements in the hypervelocity impact and redeposition processes. This effect had been noticed in simulation experiment but is more pronounced in the Long Duration Exposure Facility (LDEF) capture cells, probably due to the higher average velocities of the space impacts. Surface contamination of the pure Ge surfaces with a substance rich in Si but also containing Mg and Al provides an additional problem for the accurate determination of impactor chemistry. The effect is variable, being much larger on surfaces that were exposed to space than in those cells that remained intact. Future work will concentrate on the analyses of more leading edge impacts and the development of new SIMS techniques for the measurement of elemental abundances in extended impacts.

  14. J. PHYS IV FRANCE 7 (1997) Colloque C3,Supplement au Journal de Physique 111d'aoQt 1997

    E-print Network

    Paris-Sud XI, Université de

    place at any failures of elements of the pulse-magnetic setup MEiY like imperfect operating of its to heat up and affect the quality of the finished parts and units [2]. Any changes in the discharge charger (Fig.2), a failure of one or more condensers (Cl-C3) of the energy accumulator. And unstable

  15. Entre Ciencia e Ingeniera, ISSN 1909-8367 Ao 3. No. 6 Segundo semestre de 2009, pginas 21 -32

    E-print Network

    Alberta, University of

    realizar el control de calidad de las piezas producidas, consiste en hacer una comparación de dichas piezas a cabo el control de calidad de las piezas con gran precisión. Sin embargo, los procesos de inspección of parts to carry out the quality control of the produced pieces consists on making a comparison

  16. 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.

  17. SIMS chemical analysis of extended impacts on the leading and trailing edges of LDEF experiment AO187-2

    NASA Technical Reports Server (NTRS)

    Amari, S.; Foote, J.; Swan, P.; Walker, R. M.; Zinner, E.; Lange, G.

    1993-01-01

    Numerous 'extended impacts' found in both leading and trailing edge capture cells were successfully analyzed for the chemical composition of projectile residues by secondary ion mass spectrometry (SIMS). Most data were obtained from the trailing edge cells where 45 of 58 impacts were classified as 'probably natural' and the remainder as 'possibly man-made debris.' This is in striking contrast to leading edge cells where 9 of 11 impacts so far measured are definitely classified as orbital debris. Although all the leading edge cells had lost their plastic entrance foils during flight, the rate of foil failure was similar to that of the trailing edge cells, 10 percent of which were recovered intact. Ultraviolet embrittlement is suspected as the major cause of failure on both leading and trailing edges. The major impediment to the accurate determination of projectile chemistry is the fractionation of volatile and refractory elements in the hypervelocity impact and redeposition processes. This effect had been noted in a simulation experiment but is more pronounced in the LDEF capture cells, probably due to the higher average velocities of the space impacts. Surface contamination of the pure Ge surfaces with a substance rich in Si, but also containing Mg and Al, provides an additional problem for the accurate determination of impactor chemistry. The effect is variable, being much larger on surfaces that were exposed to space than in those cells that remained intact. Future work will concentrate on the analyses of more leading edge impacts and the development of new SIMS techniques for the measurement of elemental abundances in extended impacts.

  18. 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.

  19. Hypervelocity jets and homuncular motion in eta Carinae: an application of Fabry-Perot, ADONIS, and AO sofware

    NASA Astrophysics Data System (ADS)

    Currie, Douglas G.; Le Mignant, David; Svensson, Birgitta; Diolaiti, Emiliano; Tordo, Sebastien; Naesgarde, Katrin; Liwing, Johan; Bendinelli, Orazio; Parmeggiani, Gianluigi; Bonaccini, Domenico

    2000-07-01

    Eta Carinae is an extremely massive and highly evolved member of the Carinae starburst region. It has undergone numerous eruptions over the past millennium. In 1841, a Giant Eruption ejected several solar masses or more of material. Most of this material is currently in the dusty nebula denoted as the 'Homunculus.' ADONIS observations with the Fabry-Perot Interferometer at the Brackett gamma line around 2.16 microns have allowed probing the interior of the major elements of the Homunculus. These elements were not visible in our WFPC observations at the various visible wavelengths. The preliminary results of the analysis of this data have confirmed of the 'Double-Flask' model of the Homunculus; a model that we proposed based upon the Hubble data and spectroscopic data. This approach can also determine the opacity of the Homunculus walls, as well as the total mass and the grain structure of the dust. In a separate recent analysis, small clumps of material have been discovered that were ejected at velocities almost 1% of the speed of light. These 'Malin Bullets' and the material following the bullets, the 'contrails' called the 'Malin Spikes' have been measured using the STARFINDER program. This analysis has discovered about one hundred additional Malin Bullets. This data, as well as other data taken in direct support of the PAPAO program provide new information on the structure of the Homunculus. Inter-comparison of the WFPC data and the ADONIS data is an integral part of the PAPAO program for the validation diffuse astrometry and deconvolution software. Portions of this data will form the database for general community use for the calibration of different programs.

  20. The methane distribution on Titan: high resolution spectroscopy in the near-IR with Keck NIRSPEC/AO

    NASA Astrophysics Data System (ADS)

    Adamkovics, Mate; Mitchell, Jonathan L.

    2014-11-01

    The distribution of methane on Titan is a diagnostic of regional scale meteorology and large scale atmospheric circulation. The observed formation of clouds and the transport of heat through the atmosphere both depend on spatial and temporal variations in methane humidity. We have performed observations to measure the the distribution on methane Titan using high spectral resolution near-IR (H-band) observations made with NIRSPEC, with adaptive optics, at Keck Observatory in July 2014. This work builds on previous attempts at this measurement with improvement in the observing protocol and data reduction, together with increased integration times. Radiative transfer models using line-by-line calculation of methane opacities from the HITRAN2012 database are used to retrieve methane abundances. We will describe analysis of the reduced observations, which show latitudinal spatial variation in the region the spectrum that is thought to be sensitive to methane abundance. Quantifying the methane abundance variation requires models that include the spatial variation in surface albedo and meridional haze gradient; we will describe (currently preliminary) analysis of the the methane distribution and uncertainties in the retrieval.

  1. JOURNALDE PHYSIQUE IV ColloqueC3, supplhmentauJournalde Physique 11,Volume3, aoGt 1993

    E-print Network

    Boyer, Edmond

    of physical, chemical, opticaland electrical properties. These include extreme hardness, chemical inertness, high electrical resistivity, high dielectric strength, optical transparency and high thermal. Substratesemployed for a large number ofpractical applications, such as glass for optical components, cannot tolerate

  2. JOURNALDE PHYSIQUEIV ColloqueC3, supplkmentauJournal dePhysique11, Volume3, aoDt 1993

    E-print Network

    Paris-Sud XI, Université de

    -omtetraethoxysilane(TEOS) liquid precursor using a plasma enhanced chemicalvapor deposition (PECVD) technique, are widely used-03 films (BPSG) with better (as deposited) step coverage properties than those obtained with similar

  3. 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

  4. Degree Major Description TotalSchool Dept AOS UNCG 2008-09 Masters/Specialist Degree Recipients By Term

    E-print Network

    Saidak, Filip

    SOC G198 Department total 124 3 5 MED DRAM Theatre Education(M Lic-M Ed) 11AS THE G695 MFA DRAM Design (MFA only) 33AS THE G769 MFA DRAM Theatre for Youth(MFA only) 11AS THE G771 Department total 55 MA WGST: Financial Analysis 11BE BAE G880 MBA BADD Business Administration 202 18BE BAE G200 MBA BADM Business

  5. JOURNALDE PHYSIQUE IV CoIloqueC3, supplkmentau Journal de Physique 11,Volume3,aoOt 1993

    E-print Network

    Paris-Sud XI, Université de

    spectrometric study of laser induced pyrolytic decompositionof TIBA and TMAA C. POPOV,B. IVANOV and V SHANOV: The composition of the gaseous phases during pyrolytic laser-induced chemicalvapor deposition (LCVD) of aluminium determinesthe gaseous phase composition and the carbon incorporation into the growing layer [2,3,7]. LCVD

  6. 76 FR 52972 - United States v. Regal Beloit Corp. and A.O. Smith Corp.; Proposed Final Judgment and Competitive...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-08-24

    ...service marks, or service names ``Regal Beloit,'' ``Marathon,'' ``Leeson,'' ``FASCO,'' ``imPower,'' and...trademarks, trade names, service marks, or service names ``Marathon,'' ``Leeson,'' ``FASCO,'' ``imPower,''...

  7. arXiv:0803.0382v1[physics.ao-ph]4Mar2008 Climate Prediction through Statistical Methods

    E-print Network

    Kurnaz, Levent

    , if we look at the yearly average temperatures of these two cities, we find the averages to be around 19 provide us with temperature data. Using Detrended Fluctuation Analysis, we are investigating are normally based on the analysis of temperature records obtained from various sources like tree rings [9

  8. 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.2 `Use of GNSS for Reference Frames' 2007-2011 Chair of the IAG SG 4.2 on `Use of IGS products fro Network RTK and Atmosphere Monitoring' since 2003 Chair of the IGS-GNSS Working Group since 2001 Member

  9. J PHYS IV FRANCE 7 (1997) Colloque C3, Supplement au Journal de Physique 111d'aoQt 1997

    E-print Network

    Paris-Sud XI, Université de

    par les ondes spherique tension dans les alliages Zr-Nb. Les effects de conditions charge et contenu with spherical converging stress waves have the shape of a thick-wall spherical shell with an outer diameter and Features of Adiabatic Shear Bands in Zr-Nb Alloys in Spherical Stress Waves A.V. Dobromyslov, E.A. Kozlov

  10. JOURNALDE PHYSIQUEIV ColloqueC3, supplementauJournaldePhysique11,Volume3,aoDt1993

    E-print Network

    Boyer, Edmond

    conversion of solar energy into heat. Transition metal trioxides thin films, known as electrochromic promising electrochromic material. The electrochromic materials are able to change their optical [5-71. Of course, the phenomenon is not in a single layer, but the electrochromic layer is the active

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

    E-print Network

    Boyer, Edmond

    -assisted chemical vapour deposition (PACVD) at low temperatures (below 300"~). 2 . Experimental details a-Six-,C,:H films were deposited in a capacitively coupled r.f. parallel-plate PACVD reactor (electrode diameter: 20

  12. 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...

  13. PHILOSOPHY (I-LI) VERSUS PHILOLOGY (K'AO-CHENG): THE JEN-HSIN TAO-HSIN DEBATE*

    E-print Network

    Elman, Benjamin

    of the Confucian Classics. In particular, we will focus on the famous jen-hsin Tao-hsin [the human mind in philosophic orientation transformed Confucian inquiry from a quest for moral perfection to a programmatic-ching since the Former Han dynasty (206 B.C.-A.D. 8), the Documents became a centerpiece of the Confucian

  14. JOURNAL DE PHYSIQUE Colloque C4, suppl6ment au no 8, Tome 47, aoOt 1986

    E-print Network

    Boyer, Edmond

    and Max-Planck-Institut fiir Kernphysik, 0-6900 Heidelberg, F.R.G. Abstract - Microscopic calculations in simple models. At low beam en- ergy with increasing impact parameters we see the formation of compound coincidences between projectile like fragments and light clusters are reported [ 4 ] . A theoretical

  15. O recurso a veculos areos tripulados remotamente para realizar vrias tarefas, da investigao cientfica ao controlo de fronteiras,

    E-print Network

    Instituto de Sistemas e Robotica

    TECNOLOGIA DRONES PARA TODO O SERVI�O O recurso a veículos aéreos tripulados remotamente para privacidade aumentam TEXTOS DE ALEXANDRA SIM�ES DE ABREU FOTOGRAFIAS DE NUNO BOTELHO UAV, VANT, RPA, drones falar mais dos drones (zangões em portu- guês), nomeadamente com fins mi- litares -- podem realizar

  16. Cambios en cobertura e ndices de vegetacin de los mangles en el rea de La Parguera durante 70 aos

    E-print Network

    Gilbes, Fernando

    NDVI y las calculaciones de área con las regiones de interés. Finalmente se concluyo que el NDVI es mayor en el 2001 y que el área de cobertura aumento urante los 70 años de estudio. d Palabras Claves: NDVI Clasificaciones ENVI Regiones de Interés #12; Es debido a la

  17. Cuadernos de Antropologa, ISSN: 1409-3138, No. 21. Ao 2011 Dej el chianti por el yaj

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    Paris-Sud XI, Université de

    . Palabras clave: Yajé, Banisteriopsis caapi, Ayahuasca, Chamanismo, Colombia Abstract This essay will expose" in Bogota, Colombia. Key words: Yajé, Banisteripsis caapi, Ayahuasca, Shamanism, Colombia Mauro es alto, de.000 personas de la comunidad indígena kuna. 3 El yajé (Banisteriopsis Caapi) o ayahuasca -el nombre con el cual

  18. JOURNALDEPHYSIQUEIV ColloqueC3,supplkmentauJournal de Physique 11,Volume 3, aoQt1!393

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    Paris-Sud XI, Université de

    for the coating of high speed steel (HSS)without any post heat treatment could be shown. 2. Experimental-resistantcoatingsproduced by saltbath immersion at high temperatures have found wide technological a plication in manufacturing adherence of the films. As a disadvantage a post-heat treatment must be taken into account when steel

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

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    Saidak, Filip

    _Res Alien Hisp/Lat Any Race BA AFST African American StudiesAS AFS U803 0 27 280 0 0 01 00 Department total 110 1 0 00 01 BA BIOL 4+1 Medical Technology Pgm(BA)AS BIO U231 2 7 100 1 0 00 00 BS BIOL Biology-2 Environmental Biology (BS)AS BIO U118 13 2 180 1 0 01 01 BS BIOL 4+1 Medical Technology Pgm(BS)AS BIO U186 8 3

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

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    Saidak, Filip

    _Res Alien Hispanic/ Latino BA AFST African American StudiesAS AFS U803 0 26 290 0 0 11 01 Department total 0 4+1 Medical Technology Pgm(BA)AS BIO U231 3 2 60 1 0 00 00 BS BIOL Biology-2 Plus (BS)AS BIO U114 2 Biology (BS)AS BIO U118 23 2 280 1 0 00 02 BS BIOL 4+1 Medical Technology Pgm(BS)AS BIO U186 12 4 190 2 0