Zobrazeno 1 - 10
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pro vyhledávání: '"Sherri Johnstone"'
Publikováno v:
The Journal of the Acoustical Society of America. 131:2048-2062
This paper first reviews a method of simulating the propagation characteristics of guided waves in multilayered coaxial cylindrical elastic solid media. Secondly, this method is used to investigate the properties of the guided waves for the ultrasoni
Publikováno v:
IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control. 58:1525-1528
In clad rods, the dispersion properties of firstorder flexural [F(1, 1)] modes can differ from other modes. Normal and Stoneley modes and the existence criteria for four F(1, 1) modes are investigated. We focus on low-frequency anomalous dispersion,
Publikováno v:
The Journal of the Acoustical Society of America. 130:EL44-EL49
This paper considers the propagation of Stoneley modes along the interfaces of three-layered concentric cylindrical solid media in order to assist in the design of ultrasonic transmission rods. The phase velocity dispersion curves and amplitude distr
Publikováno v:
Measurement Science and Technology. 18:567-578
Nanoscience promises to transform today's world in the same way that integrated semiconductor devices transformed the world of electronics and computation. In the post-genomic era, the greatest challenge is to make connections between the structures
Publikováno v:
Nondestructive Testing and Evaluation. 19:111-120
An experiment was conducted to investigate the potential of using the passive (awaiting active pulsing) transducers in a 2D ultrasonic array as signal receivers. This paper will demonstrate that this new technique normal probe diffraction (NPD) which
Publikováno v:
2012 IEEE International Ultrasonics Symposium.
Theoretical and numerical analyses of propagating properties of non-asymmetric flexural modes in a three-layered cylindrical transmission rod model are presented in this paper. The first order flexural mode and segments of the higher order flexural m
Publikováno v:
2010 IEEE International Ultrasonics Symposium.
This paper presents an investigation into the dispersion of guided waves in cylindrical multi-layered solid media. This will aid in the design of ultrasonic transmission rods, consisting of a metal rod surrounded by a sheath, used in liquid metal cle
Autor:
Muhammad Alnadabi, Sherri Johnstone
Publikováno v:
2009 6th International Multi-Conference on Systems, Signals and Devices.
This paper suggests the application of the Receiver Operating Characteristics (ROC) graph to assess the performance of any speech/music discrimination method. ROC graphs are applied in the field of speech/music discrimination to assess the Time Serie
Autor:
Sherri Johnstone
Publikováno v:
The Analyst. 133(3)
This article describes the basic principles of the Hall effect and how it has been applied in solid state applications to measure both the magnetic field and material properties. This is followed by an outline of research undertaken in aqueous ionic
Publikováno v:
Measurement Science & Technology; Mar2007, Vol. 18 Issue 3, p567-578, 12p