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Paper Abstract and Keywords
Presentation 2009-02-24 12:55
Underground Imaging Using Shear Waves -- Study on the chirp waves by considered the instantaneously frequency attenuation --
Hiraku Kawasaki, Tsuneyoshi Sugimoto (Toin Univ. of Yokohama) US2008-94
Abstract (in Japanese) (See Japanese page) 
(in English) In order to detect the buried relics and ruins at shallow depth, we have proposed a method by using shear waves. This paper examines the effect of the pulse compression processing for improving the underground imaging resolution. Using a super-magnetostriction vibrator which can change waveforms and use high frequency waves, we generate both chirp waves and ordinary burst waves.
To confirm the size of each simulated image, the half width of each image’s amplitude is measured. Then, an exploration experiment is carried out where the buried position has already been known. As these results, improvement of the image resolution was effective by considering the attenuation of the instantaneously frequency in the pulse compression.
Keyword (in Japanese) (See Japanese page) 
(in English) Super-magnetostriction vibrator / shear wave / pulse compression / chirp wave / Instantaneously Frequency / / /  
Reference Info. IEICE Tech. Rep., vol. 108, no. 436, US2008-94, pp. 7-12, Feb. 2009.
Paper # US2008-94 
Date of Issue 2009-02-17 (US) 
ISSN Print edition: ISSN 0913-5685    Online edition: ISSN 2432-6380
Copyright
and
reproduction		 All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
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Conference Information
Committee US  
Conference Date 2009-02-24 - 2009-02-24 
Place (in Japanese) (See Japanese page) 
Place (in English) NIHON DEMPA KOGYO CO.,LTD. 
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To US 
Conference Code 2009-02-US 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Underground Imaging Using Shear Waves 
Sub Title (in English) Study on the chirp waves by considered the instantaneously frequency attenuation 
Keyword(1) Super-magnetostriction vibrator  
Keyword(2) shear wave  
Keyword(3) pulse compression  
Keyword(4) chirp wave  
Keyword(5) Instantaneously Frequency  
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1st Author's Name Hiraku Kawasaki  
1st Author's Affiliation Toin University of Yokohama (Toin Univ. of Yokohama)
2nd Author's Name Tsuneyoshi Sugimoto  
2nd Author's Affiliation Toin University of Yokohama (Toin Univ. of Yokohama)
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Speaker Author-1 
Date Time 2009-02-24 12:55:00 
Presentation Time 25 minutes 
Registration for US 
Paper # US2008-94 
Volume (vol) vol.108 
Number (no) no.436 
Page pp.7-12 
#Pages 6 
Date of Issue 2009-02-17 (US) 

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