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Digitale Medien

A Fast Shape Inversion Method of Flaws in Materials for Infrastructures (2004)

Kitahara, M. ; Onishi, M. ; Nakahata, Kouichi ; [weitere]

s.l. ; Stafa-Zurich, Switzerland

Key engineering materials Vol. 261-263 (Apr. 2004), p. 981-986

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Details

ISSN: 1013-9826

Quelle: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008

Thema: Maschinenbau

Notizen: The Born inverse scattering method is applied to the shape reconstruction of flaws in the concretematerials. To accelerate the inversion process, the algorithm of the fast Fourier transform is introducedin the integration process of the scattering amplitude. The concrete specimens with flaw models areprepared and the scattered waveforms from flaws are acquired in the pulse-echo mode. The shape offlaws is reconstructed by using the measured waveforms and the performance of the inversion methodis demonstrated experimentally

Materialart: Digitale Medien

URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/47/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.261-263.981.pdf

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Digitale Medien

Report of a patient with aortic dissection evolving into binocular ischemic retinopathy (2000)

Nakaya-Onishi, M. ; Okamoto, N. ; Suzuki, A. ; [weitere]

Springer

Graefe's archive for clinical and experimental ophthalmology 238 (2000), S. 200-202

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ISSN: 1435-702X

Quelle: Springer Online Journal Archives 1860-2000

Thema: Medizin

Notizen: Abstract · Background: Carotid artery disease is known to cause a variety of ischemic ocular syndromes. We report a patient with an aortic dissection that evolved into binocular ischemic retinopathy. · Methods: Case report.· Results: A 49-year-old male patient presented with stomach pains and with no ophthalmologic symptoms. After extensive examination, a diagnosis of aortic dissection was made to account for the acute abdominal pain. Sixteen days later, he noted binocular photopsia and ophthalmoscopy revealed ischemic retinopathy. Arterial stent implantation and right coronary reconstitution surgery were performed. Subsequently, the ischemic lesions in the retina disappeared and no abnormality was observed by retinal angiography 1 year later. · Conclusion: Binocular ischemic retinopathy can be a sign of aortic or carotid dissection, and these observations suggest that aortic dissection should be included in the differential diagnosis whenever ischemic changes are detected in the retina.