1–13 of 13 hits
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    An optimized spatial sampling strategy for wide-view planar array 3D sonar sensors

    Free access
    Reijniers, Jonas / Kerstens, Robin / Steckel, Jan | BASE | 2020
    the set of sampling directions and reduce its number to a minimum. In this paper we propose a spatial sampling strategy for array based sonar ...

    Piezoelectric composites with high sensitivity and high capacitance for use at high pressures

    Xu, Q.C. / Yoshikawa, S. / Belsick, J.R. et al. | Tema Archive | 1991
    large dielectric constant (K) and low dielectric loss, and great mechanical strength. A shallow cavity between the PZT ceramics and thick ...

    Computational intelligence aspects for defect classification in aeronautic composites by using ultrasonic pulses

    Cacciola, M. / Calcagno, S. / Morabito, F.C. et al. | Tema Archive | 2008
    from faults and problems. Errors during the manufacturing or the plies' overlapping, in fact, can cause particular flaws in the resulting ...

    An ultrasonic time-delay spectrometry system employing digital processing

    Gammell, P.M. / Maruvada, S. / Harris, G.R. | Tema Archive | 2007
    systems are available, but only in the audio frequency range. Several ultrasonic research TDS systems have been constructed, and they have been ...
    Keywords: biomedizinischer Ultraschall

    Applications of through-air ultrasound for rapid NDE scanning in the aerospace industry

    Kelly, S.P. / Farlow, R. / Hayward, G. | Tema Archive | 1996
    industrial environment. A number of scan images, performed on realistic samples, are shown and the results compared with those obtained using ...
    Keywords: Ultraschalltechnik

    NDE in aerospace-requirements for science, sensors and sense

    Heyman, J.S. | Tema Archive | 1989
    inspection into their plans, bringing NDE into engineering and management priorities. The measurement focus is on ultrasonics with generous case ...
    Keywords: ULTRASCHALL

    An intelligent ultrasonic inspection system for flooded member detection in offshore structures

    Hayward, G. / Pearson, J. / Stirling, G. | Tema Archive | 1993
    Auswertung von Ultraschall-A-Bildern. Nicht wassergefüllte Strukturen zeigen nur eine Echofolge aus der Rohrwandung, wassergefüllte hingegen ein ...

    An acoustic proximity ranging system for monitoring the cavity thickness

    Li Xi / Wu, Renbiao / Rasmi, S. et al. | Tema Archive | 2003
    To control high speed underwater vehicles, a proximity ranging system is needed to monitor the cavity thickness. In this paper, we study a ...

    Long-term performance of precision crystal oscillators in a near-Earth orbital environment

    Rueger, L.J. / Norton, J.R. / Lasewicz, P.T. | Tema Archive | 1993
    The Navy Navigation Satellite System (NNSS) uses precision quartz crystal oscillators to provide time and frequency in the orbiting ...

    High-reliability SAW bandpass filters for space applications

    Hickernell, F.S. | Tema Archive | 1988
    and deep-space satellite programs. SAW filters have been incorporated in several NASA standard TT&C transponders and NASA standard tracking ...
    Keywords: TRACKING AND DATA RELAY SATELLITE SYSTEM

    SonoTweezer:An Acoustically Powered End-Effector for Underwater Micromanipulation

    Free access
    Mohanty, Sumit / Fidder, Robbert-Jan / Matos, Pedro M. et al. | BASE | 2022
    capable of trapping and manipulation of sub-mm sized agents underwater. Based on a parametric investigation with numerical pressure field ...
    Keywords: Frequency control , ultrasonics

    In vivo Motion Correction in Super Resolution Imaging of Rat Kidneys

    Free access
    Taghavi, Iman / Andersen, Sofie Bech / Hoyos, Carlos Armando Villagomez et al. | BASE | 2021
    breathing, heartbeats, and muscle contractions are often significantly above this level. The paper therefore introduces a method for estimating ...

    In vivo Motion Correction in Super Resolution Imaging of Rat Kidneys

    Free access
    Taghavi, Iman / Bech Andersen, Sofie / Hoyos, Carlos A. Villagomez et al. | BASE | 2021
    breathing, heartbeats, and muscle contractions are often significantly above this level. The paper therefore introduces a method for estimating ...