Now showing items 110-129 of 4251

  • AMBER closure and differential phases: accuracy and calibration with a beam commutation 

    Millour, F; Petrov, RG; Vannier, M; Kraus, S (Society of Photo-optical Instrumentation Engineers (SPIE), 2008-07-28)
    The first astrophysical results of the VLTI focal instrument AMBER have shown the importance of the differential and closure phase measures, which are supposed to be much less sensitive to atmospheric and instrumental ...
  • AMBER/VLTI and MIDI/VLTI spectro-interferometric observations of the B[e] supergiant CPD-57\deg2874. Size and geometry of the circumstellar envelope in the near- and mid-IR 

    Domiciano de Souza, A; Driebe, T; Chesneau, O; Hofmann, K-H; Kraus, S; Miroshnichenko, AS; Ohnaka, K; Petrov, RG; Preisbisch, T; Stee, P; Weigelt, G; Lisi, F; Malbet, F; Richichi, A (EDP Sciences, 2007-02-20)
    We present the first high spatial and spectral resolution observations of the circumstellar envelope (CSE) of a B[e] supergiant (CPD−57◦ 2874), performed with the Very Large Telescope Interferometer (VLTI). Spectra, ...
  • AMBER/VLTI high spectral resolution observations of the Brγ emitting region in HD 98922. A compact disc wind launched from the inner disc region 

    Caratti o Garatti, A; Tambovtseva, LV; Garcia Lopez, R; Kraus, Stefan; Schertl, D.; Grinin, VP; Weigelt, Gerd; Hofmann, Karl-Heinz; Massi, F.; Lagarde, S.; Vannier, M.; Malbet, F. (EDP Sciences, 2015-10)
    Context. High angular and spectral resolution observations can provide us with fundamental clues to the complex circumstellar structure of young stellar objects (YSOs) and to the physical processes taking place close to ...
  • AMBER/VLTI observations of the B[e] star MWC 300 

    Wang, Y.; Weigelt, Gerd; Kreplin, Alexander; Hofmann, Karl-Heinz; Kraus, Stefan; Miroshnichenko, A.S.; Schertl, D.; Chelli, A.; Domiciano de Souza, A.; Massi, F.; Robbe-Dubois, S. (EDP Sciences for European Southern Observatory (ESO), 2012)
    Aims. We study the enigmatic B[e] star MWC 300 to investigate its disk and binary with milli-arcsecond-scale angular resolution. Methods. We observed MWC 300 with the VLTI/AMBER instrument in the H and K bands and ...
  • Ambient vibration re-testing and operational modal analysis of the Humber Bridge 

    Brownjohn, James; Magalhaes, Felipe; Caetano, Elsa; Cunha, Alvaro (Elsevier, 2010-08)
    An ambient vibration survey of the Humber Bridge was carried out in July 2008 by a combined team from the UK, Portugal and Hong Kong. The exercise had several purposes that included the evaluation of current technology ...
  • Ambient vibration studies for system identification of tall buildings 

    Brownjohn, James (Wiley, 2002-10-29)
    The performance of a building under wind and seismic loads depends on stiffness and mass distribution, and may be estimated using finite element codes. Experience has, however, shown that such finite element models often ...
  • Ambient vibration survey of the Bosporus Suspension Bridge 

    Brownjohn, James; Dumanoglu, AA; Severn, RT; Blakeborough, AB (Wiley, 1989-02)
    Traffic and wind excitation has been used to obtain the dynamic characteristics of the first Bosporus (Bogazici) Suspension Bridge. Structural symmetry and the absence of suspended side-spans allowed attention to be focused ...
  • Ambient vibration survey of the Fatih Sultan Mehmet (Second Bosporus) Suspension Bridge 

    Brownjohn, James; Dumanoglu, AA; Severn, RT (Wiley, 1992)
    Ambient accelerations due to dynamic excitation by wind and traffic were measured on the deck, towers, cables and hangers of the Fatih suspension bridge. From these measurements it was possible to obtain natural frequencies, ...
  • Ambipolar diffusion in low-mass star formation. I. General comparison with the ideal MHD case 

    Masson, J; Chabrier, G; Hennebelle, P; Vaytet, N; Commerçon, B (EDP Sciences, 2016-02-12)
    In this paper, we provide a more accurate description of the evolution of the magnetic flux redistribution during prestellar core collapse by including resistive terms in the magnetohydrodynamics (MHD) equations. We focus ...
  • AMI-LA radio continuum observations of Spitzer c2d small clouds and cores: Perseus region 

    Scaife, Anna M.M.; Hatchell, Jennifer; Davies, Matthew; Franzen, Thomas M.O.; Grainge, Keith J.B.; Hobson, Michael P.; Hurley-Walker, Natasha; Lasenby, Anthony N.; Olamaie, Malak; Perrott, Yvette C.; Pooley, Guy G.; Rodríguez-Gonzálvez, Carmen; Saunders, Richard D.E.; Schammel, Michel P.; Scott, Paul F.; Shimwell, Timothy; Titterington, David; Waldram, Elizabeth (Oxford University Press / Royal Astronomical Society, 2011)
    We present deep radio continuum observations of the cores identified as deeply embedded young stellar objects in the Perseus molecular cloud by the Spitzer c2d programme at a wavelength of 1.8 cm with the Arcminute Microkelvin ...
  • Amplified mid-latitude planetary waves favour particular regional weather extremes 

    Screen, James A.; Simmonds, Ian (Nature Publishing Group, 2014)
    There has been an ostensibly large number of extreme weather events in the Northern Hemisphere mid-latitudes during the past decade [1]. An open question that is critically important for scientists and policy makers is ...
  • Analog wormholes and black hole laser effects in hydrodynamics 

    Peloquin, C; Euvé, L-P; Philbin, T; Rousseaux, G (American Physical Society, 2016-04-18)
    We numerically study water wave packets on a spatially varying countercurrent in the presence of surface tension. Depending on the details of the velocity profile, we show that traversable and bidirectional analogue wormholes ...
  • Analysis and control of the dynamical response of a higher order drifting oscillator 

    Liu, Y; Páez Chávez, J; Pavlovskaia, E; Wiercigroch, M (Royal Society, The, 2018-02-21)
    This paper studies a position feedback control strategy for controlling a higher order drifting oscillator which could be used in modelling of the vibro-impact drilling. Special attention is given to two control issues, ...
  • Analysis of anchor-size effects on pinned scroll waves and measurement of filament rigidity. 

    Nakouzi, E; Jiménez, ZA; Biktashev, V. N.; Steinbock, O (American Physical Society, 2014-04-02)
    Inert, spherical heterogeneities can pin three-dimensional scroll waves in the excitable Belousov-Zhabotinsky reaction. Three pinning sites cause initially circular rotation backbones to approach equilateral triangles. The ...
  • Analysis of Automotive Cyber-Attacks on Highways using Partial Differential Equation Models 

    Ghanavati, M; Chakravarthy, A; Menon, PP (Institute of Electrical and Electronics Engineers (IEEE), 2017-10-09)
    This paper considers scenarios wherein a group of malicious vehicles on a highway perform a cooperative attack with the motive of creating undesirable wave effects among other vehicles on the highway. The two species ...
  • An analysis of domestic water consumption in Jaipur, India 

    Sadr, SMK; Memon, Fayyaz; Jain, A; Gulati, S; Duncan, AP; Hussein, W; Savić, Dragan; Butler, David (SCIENCEDOMAIN International, 2016-04)
    Aim: To explore the relation between water consumption and water use behaviour and attitudes, and devices applied in households in urban areas in India. Methodology and study site: This paper presents the results of a ...
  • An analysis of domestic water consumption in Jaipur, India 

    Sadr, SMK; Memon, Fayyaz; Jain, A; Gulati, S; Duncan, AP; Hussein, W; Savić, Dragan; Butler, David (SCIENCEDOMAIN International, 2016-04)
    Aim: To explore the relation between water consumption and water use behaviour and attitudes, and devices applied in households in urban areas in India. Methodology and study site: This paper presents the results of a ...
  • Analysis of load test on composite I-girder bridge 

    Huseynov, F; Brownjohn, JMW; O Brien, EJ; Hester, D (Springer Verlag, 2017-04-26)
    This paper showcases the importance of field testing in efforts to deal with the deteriorating infrastructure. It shows that when tested, bridges do not necessarily behave as expected under load, particularly with respect ...
  • An analysis of the combined consequences of pluvial and fluvial flooding 

    Chen, Albert S.; Djordjevic, Slobodan; Leandro, Jorge; Savic, Dragan (IWA Publishing, 2010)
    Intense rainfall in urban areas often generates both pluvial flooding due to the limited capacity of drainage systems, as well as fluvial flooding caused by deluges from river channels. The concurrence of pluvial and fluvial ...
  • Analysis of the functional morphology of mouthparts of the beetle Priacma serrata, and a discussion of possible food sources. 

    Hörnschemeyer, T; Bond, J; Young, PG (Oxford University Press / Entomological Society of America, 2013-11-12)
    With the help of scanning electron microscopy, high resolution X-ray tomography (µCT), and finite element analysis, the mechanical and functional properties of the mandibles and associated muscles of the beetle Priacma ...