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Extraction of Median Plane from Facial 3D Point Cloud Based on Symmetry Analysis Using ICP Algorithm
Shinji Yamada,Huimin Lu,Joo Kooi Tan,Hyoungseop Kim,Namiko Kimura,Takako Okawachi,Etsuro Nozoe,Norifumi Nakamura 제어로봇시스템학회 2018 제어로봇시스템학회 국제학술대회 논문집 Vol.2018 No.10
Cleft lip is a kind of congenital facial morphological abnormality. In the clinical field of cleft lip, it is necessary to analyze symmetric shape. However, there is no method to analyze the cleft lip technique based on symmetrical viewpoints. On the other hand, in our previous method to find a symmetric axis using a 2D image, since the middle line is extracted only from the front view of the face moire image. There was a problem that low accuracy was obtained by slight rotation of the face and it was not possible to consider 3D information. In this paper, we propose a method to extract the median plane of the face by analyzing based on bilateral symmetry by using 3D point cloud on the face of front. By extracting the median plane, we believe that not only surgical assistance of doctor be possible but also become a clue to development of simulation software which is the end goal.
Image Analysis of Cleft Lip from Moire Image Based on Symmetry Analysis
Shinji YAMADA,Huimin LU,Joo Kooi TAN,Hyoungseop KIM,Namiko KIMURA,Takako OKAWACHI,Etsuro NOZOE,Norifumi NAKAMURA 제어로봇시스템학회 2017 제어로봇시스템학회 국제학술대회 논문집 Vol.2017 No.10
About 4% of babies in Japan suffer from congenital anomalies. Cleft lip is the most common disorder among external malformations occurring at a rate of 1 in 500 people. The goal of treatment is to recover symmetric and functional lips and nose forms. However, in the case of unilateral cleft lip where the lips and nose themselves are shifted from the midline of the face, it is difficult to set the midline which is the symmetry axis for evaluating the degree of symmetry of the face. In this paper, we propose an image processing method for extracting the midline using zebra image and shadow image which are two dimensional image created based on three dimensional analysis. Also, we evaluate the degree of asymmetry of the face by using the midline as the axis. As a result of applying the proposed method to 25 cases, which indicated that the proposed method is useful.
Shinji Inoue,Shigeru Yamada 대한산업공학회 2015 대한산업공학회 추계학술대회논문집 Vol.2015 No.11
We discuss a simulation-based interval estimation approach for software reliability assessment. It is known that an S-shaped software reliability growth curve is often observed in an actual software testing-phase. Therefore, we focus on an inflection S-shaped model, which enables us to describe both of exponential and S-shaped software reliability growth curves flexibly, and discuss a bootstrapping method for software reliability assessment based on the inflection Sshaped software reliability growth model. In the interval estimation of software reliability, we apply three-types of bootstrap confidence interval estimation methods. Finally, we show numerical examples for our interval estimation approach based on the bootstrapping method by using actual fault-counting data.
Shinji Inoue,Shigeru Yamada 대한산업공학회 2018 대한산업공학회 추계학술대회논문집 Vol.2018 No.11
Reflecting the debugging process or environment in testing phase on software reliability models is often discussed as one of the approaches for improving the accuracy of model-based software reliability assessment. We propose a few specific models for software reliability measurement by considering several debugging processes based on the notion of a phase-type probability distribution. Further we show numerical examples of our models, and discuss the usefulness of a phase-type modeling approach by using actual fault counting data.
Fumihisa Kobayashi,Shinji Morosawa,Teruya Maki,Makiko Kakikawa,Maromu Yamada,Yutaka Tobo,Chun-Sang Hon,Atsushi Matsuki,Yasunobu Iwasaka 한국대기환경학회 2011 Asian Journal of Atmospheric Environment (AJAE) Vol.5 No.3
This work focuses on the analysis of bioaerosols in the atmosphere at higher altitudes over Noto Peninsula,Japan. We carried out direct sampling via aircraft,separated cultures, and identified present isolates. Atmospheric bioaerosols at higher altitudes were collected using a Cessna 404 aircraft for an hour at an altitude of 3,500 m over the Noto Peninsula. The aircraft-based direct sampling system was devised to improve upon the system of balloon-based sampling. In order to examine pre-existing microorganism contamination on the surface of the aircraft body, bioaerosol sampling was carried out just before takeoff using the same method as atmospheric sampling. Identification was carried out by a homology search for 16S or 18S rDNA isolate sequences in DNA databases (GenBank). Isolate sampling just before takeoff revealed Stretpomyces sp., Micrococcus sp., and Cladosporium sp. One additional strain,Bacillus sp., was isolated from the sample after bioaerosol collection at high altitude. As the microorganism contamination on the aircraft body before takeoff differed from that while in the air, the presence of additional, higher atmosphere-based microorganisms was confirmed. It was found that Bacillus sp. was floating at an altitude of 3,500 m over Noto Peninsula.
Conclusions and Suggestions on Low-Dose and Low-Dose Rate Radiation Risk Estimation Methodology
Sakai, Kazuo,Yamada, Yutaka,Yoshida, Kazuo,Yoshinaga, Shinji,Sato, Kaoru,Ogata, Hiromitsu,Iwasaki, Toshiyasu,Kudo, Shin'ichi,Asada, Yasuki,Kawaguchi, Isao,Haeno, Hiroshi,Sasaki, Michiya The Korean Association for Radiation Protection 2021 방사선방어학회지 Vol.46 No.1
Background: For radiological protection and control, the International Commission on Radiological Protection (ICRP) provides the nominal risk coefficients related to radiation exposure, which can be extrapolated using the excess relative risk and excess absolute risk obtained from the Life Span Study of atomic bomb survivors in Hiroshima and Nagasaki with the dose and dose-rate effectiveness factor (DDREF). Materials and Methods: Since it is impossible to directly estimate the radiation risk at doses less than approximately 100 mSv only from epidemiological knowledge and data, support from radiation biology is absolutely imperative, and thus, several national and international bodies have advocated the importance of bridging knowledge between biology and epidemiology. Because of the accident at the Tokyo Electric Power Company (TEPCO)'s Fukushima Daiichi Nuclear Power Station in 2011, the exposure of the public to radiation has become a major concern and it was considered that the estimation of radiation risk should be more realistic to cope with the prevailing radiation exposure situation. Results and Discussion: To discuss the issues from wide aspects related to radiological protection, and to realize bridging knowledge between biology and epidemiology, we have established a research group to develop low-dose and low-dose-rate radiation risk estimation methodology, with the permission of the Japan Health Physics Society. Conclusion: The aim of the research group was to clarify the current situation and issues related to the risk estimation of low-dose and low-dose-rate radiation exposure from the viewpoints of different research fields, such as epidemiology, biology, modeling, and dosimetry, to identify a future strategy and roadmap to elucidate a more realistic estimation of risk against low-dose and low-dose-rate radiation exposure.