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- 저자 : Osamu Yuuki (검색결과 2 건)
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Dexterous motions of Japanese dance by a miniature humanoid robot
Osamu Yuuki,Seiya Yamazaki,Kunihiro Yamada,Naoyuki Kubota 제어로봇시스템학회 2009 제어로봇시스템학회 국제학술대회 논문집 Vol.2009 No.8
First, we discuss about requirements for humanoid robots of Japan. Here, Japanese dance is one of important Japanese cultures. Also, there are many people unfamiliar with Japanese dance in other countries. If they hope to learn Japanese dance, it is very important to instruct such people in Japanese dance. There have been several studies about the system for imitating human dances by using a robot. In this paper, we discuss the availability of robots for the instruction of Japanese dance. Typically, a classical Japanese dance is composed with fluent motions. Therefore, a robot needs to shift the center of gravity smoothly in Japanese dancing. In such a case, we found that ‘Suri-Ashi’ motion was effective. In this study, we focused on the realization of ‘Suri-Ashi’ motion. We researched about ‘Suri-Ashi’ motion from various points. Especially, we investigated points for implementing ‘Suri-Ashi’ motion to a miniature humanoid robot. Finally, we carried out experiments of dexterous motions in Japanese dancing by using a miniature humanoid robot.
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Manabe Osamu,Oyama-Manabe Noriko,Naya Masanao,Obara Masahiko,Kikuchi Yasuka,Aikawa Tadao,Tomiyama Yuuki,Sugimori Hiroyuki,Katoh Chietsugu,Tamaki Nagara,Anzai Toshihisa 아시아심장혈관영상의학회 2019 Cardiovascular Imaging Asia Vol.3 No.1
Objective: Although the relationship between coronary stenosis and myocardial perfusion is well established, little is known regarding the contribution of subendocardial infarction to this relationship. The purpose of this study was to evaluate the effects of obstructive coronary stenosis and subendocardial infarction on myocardial flow reserve (MFR). Materials and Methods: Fifty-four patients with suspected and known coronary artery disease (CAD) who underwent perfusion 3T-MRI and invasive angiography were studied. The time-intensity curves of the left ventricle tissue and cavity were fitted by a single-compartment model to compute myocardial blood flow (MBF). Global MFR and regional MFR were calculated by dividing stress MBF by rest MBF. Myocardial infarction lesions were assessed by late gadolinium enhancement. The effects of obstructive coronary stenosis and subendocardial infarction on the regional MFR were evaluated. Results: Obstructed vessels (≥70% diameter stenosis for main vessels or ≥50% for left main) were observed in 65 out of 162 vessels. Further analysis demonstrated that MFR in obstructed vessels was significantly lower than that in non-obstructed vessels {1.48 [the interquartile range (IQR) : 1.31–2.03] vs. 1.84 (IQR: 1.44–2.46), p=0.01}. After excluding vessels with transmural infarction (n=19), the MFR for vessels with subendocardial infarction (n=20) was significantly lower than the MFR for non-infarction vessels (n=123) [1.48 (IQR: 1.40–1.79) vs. 1.88 (IQR: 1.41–2.48), p=0.02]. Conclusion: Subendocardial infarction in addition to obstructive coronary atherosclerosis might be associated with an impairment of regional MFR in patients with CAD.
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