Zobrazeno 1 - 10
of 25
pro vyhledávání: '"Marie Nakazawa"'
Publikováno v:
Acoustical Science and Technology. 36:139-148
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::081bf7bd8e19ffd710745a372b95e9cf
https://doi.org/10.1250/ast.36.139
https://doi.org/10.1250/ast.36.139
Publikováno v:
IEEE Transactions on Ultrasonics, FerroelectrIcs, and Frequency control. 60(No. 10):2175-2188
In this paper, we present a polyurea transducer that works at 100 MHz under water. The transducer was designed using an equivalent circuit model so that an aluminum (top)-polyurea-aluminum (bottom)-polyimide layer had a resonant frequency of 100 MHz
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::601fe06b67b60d47a1c246a9d460e59c
http://t2r2.star.titech.ac.jp/cgi-bin/publicationinfo.cgi?q_publication_content_number=CTT100661051
http://t2r2.star.titech.ac.jp/cgi-bin/publicationinfo.cgi?q_publication_content_number=CTT100661051
Publikováno v:
IEEE Transactions on UltrasonIcs, FerroelectrIcs, and Frequency control. 56(No. 8):1761-1768
This paper presents the novel measurement method of the surface acoustic wave velocity by the variable-line- focus transducer using a polyurea piezoelectric ultrasonic transducer. First, a multiresonant polyurea thin-film ultrasonic transducer is fab
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0789606c58186d039c8f89799b439161
http://t2r2.star.titech.ac.jp/cgi-bin/publicationinfo.cgi?q_publication_content_number=CTT100585601
http://t2r2.star.titech.ac.jp/cgi-bin/publicationinfo.cgi?q_publication_content_number=CTT100585601
Publikováno v:
Japanese Journal of Applied Physics. 47:4044-4047
Focusing on the possibilities of polyurea as an acceleration sensor with characteristics such as flexibility, durability against large deformation, good linearity, and capability of deposition in dryprocess and insolubility in organic solvent, we fir
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9c5c2364ae7934d1eb7a9ad1a721c84e
https://doi.org/10.1143/jjap.47.4044
https://doi.org/10.1143/jjap.47.4044
Publikováno v:
Japan Journal of Applied Physics. 46(No. 7B):4486-4489
In this study, the characteristics of an ultrasonic beam radiated by a variable-line-focus-beam transducer were numerically calculated by finite-difference time domain (FDTD) method and liquid-elastic wave reflection theory. The interference ripple c
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8b5a495e67579624c7e65281008de6be
http://t2r2.star.titech.ac.jp/cgi-bin/publicationinfo.cgi?q_publication_content_number=CTT100544187
http://t2r2.star.titech.ac.jp/cgi-bin/publicationinfo.cgi?q_publication_content_number=CTT100544187
Publikováno v:
Jpn. J. Appl. Phys.. 46(No. 7B):4466-4473
We have been investigating ultrasonic transducers using a polyurea piezoelectric material, which is fabricated by vapor deposition. To enhance the transducer performance, a multilayered configuration is studied in this work. First, the fabrication an
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2b34359eea9541214c110f138faa2b11
http://t2r2.star.titech.ac.jp/cgi-bin/publicationinfo.cgi?q_publication_content_number=CTT100549381
http://t2r2.star.titech.ac.jp/cgi-bin/publicationinfo.cgi?q_publication_content_number=CTT100549381
Autor:
Marie Nakazawa, Atsuhiro Nishikata
Publikováno v:
IEICE Trans. Fundamentals. (12):3584-3592
In this study, we propose a new acoustic model including the human ear canal and a thin tube earphone. The use of a tube earphone enables simultaneous listening of both virtual and real surrounding sound. First, we perform acoustic FDTD (finite diffe
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b64669a63e21c7e234935a6eb8a50751
http://t2r2.star.titech.ac.jp/cgi-bin/publicationinfo.cgi?q_publication_content_number=CTT100406392
http://t2r2.star.titech.ac.jp/cgi-bin/publicationinfo.cgi?q_publication_content_number=CTT100406392
Publikováno v:
Proc. of IEEE-UFFC Ultrasonics Symposium. 1:728-731
High intensity focused ultrasound (HIFU) can destroy tumors or stop internal bleeding. The primary physical mechanism in HIFU is the conversion of acoustic energy to heat, which as HIFU amplitude increases is enhanced by nonlinear acoustic propagatio
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::344195b24ac1c664657166e57ae37beb
http://t2r2.star.titech.ac.jp/cgi-bin/publicationinfo.cgi?q_publication_content_number=CTT100507509
http://t2r2.star.titech.ac.jp/cgi-bin/publicationinfo.cgi?q_publication_content_number=CTT100507509
Publikováno v:
IEEE transactions on ultrasonics, ferroelectrics, and frequency control. 54(10)
Ultrasonic transducers using polyurea piezoelectric thin film are studied in this paper. Aromatic polyurea thin films, prepared by vapor deposition polymerization, have useful characteristics for use as an ultrasonic transducer. This paper presents t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::92c942e576cce69ad2d197e6bb7a8125
https://pubmed.ncbi.nlm.nih.gov/18019256
https://pubmed.ncbi.nlm.nih.gov/18019256
Publikováno v:
2006 IEEE Ultrasonics Symposium.
We have been investigating ultrasonic transducers using polyurea piezoelectric material, which is fabricated through vapor deposition process. To enhance the transducer performance, a multi-layered configuration is studied in this study. The fabricat
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4384bd021ecd143f1b79410d4a533101
https://doi.org/10.1109/ultsym.2006.542
https://doi.org/10.1109/ultsym.2006.542