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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.
A case of hepatic anisakidosis caused by Anisakis pegreffii mimicking liver cancer
Minoru Yamada,Fumi Murakoshi,Hisashi Ikoma,Osamu Inamori,Akio Yanagisawa,Eiichi Konishi 대한기생충학ㆍ열대의학회 2023 The Korean Journal of Parasitology Vol.61 No.3
Extra-gastrointestinal anisakidosis is rare. We herein report an Anisakis pegreffii infection in a patient with hepatic anisakidosis diagnosed based on its molecular identification. A 71-year-old male patient had a hepatic tumor presenting as a low-density area of 20 mm in diameter in segment 6 of the liver on abdominal ultrasonography, computed tomography, and magnetic resonance imaging. The surgically resected pathological specimen revealed a necrotizing eosinophilic granuloma containing nematode larvae, possibly an Anisakis larva. Molecular and phylogenetic analysis demonstrated Anisakis larvae belonging to A. pegreffii. The present results will help identify and characterize unknown Anisakis species in histological sections.
HIGH POWER REVERSE CONDUCTION GTO THYRISTORS
Yoshikazu Takahashi,Masahide Watanabe,Osamu Yamada,Humiaki Kirihata,Osamu Hashimoto 전력전자학회 1989 ICPE(ISPE)논문집 Vol.- No.-
We have newly developed two types of reverse conducting GTO(RC-GTO)thynstors with ratings of 2.5kV,2000A and t. 5kV,3000A. Good electrical separation between the GTO part and the diode part was attained by introducing a double diffused p-base profile. High turn-off capability was achieved by reducing the variation of on-state voltage and gate impedance among the GTO segments.<br/> Especially for the 4.5kV, 3000A device, a pin Junction structure with anode shorting was applied in order to reduce on-state voltage and switching energy.
Kato Shinichi,Terada Nobuki,Niwa Osamu,Yamada Mitsuko 대한척추외과학회 2022 Asian Spine Journal Vol.16 No.4
Study Design: Retrospective observational study.Purpose: In this study we identify risk factors, including patient demographics, sagittal parameters, and clinical examinations, affecting incomplete L5/S posterior lumbar interbody fusion (PLIF).Overview of Literature: The lumbosacral spine is considered to have an interbody fusion rate lower than that of the lumbar spine, but few studies have investigated the cause, including investigating the pelvis. We believe that pelvic morphology can affect L5/S interbody fusion of the lumbosacral spine.Methods: We observed 141 patients (61 men, 80 women; average age, 65.8 years) who had undergone PLIF and checked for the presence of L5/S interbody fusion. We investigated factors such as age, gender, the presence of diffuse idiopathic skeletal hyperostosis (DISH), fusion level, and grade 2 osteotomy, as well as pre-, post-, and post−preoperative L5/S disk height and angle, lumbar lordosis, Visual Analog Scale (VAS) score, Japanese Orthopaedic Association (JOA) score, and pelvic incidence (PI), comparing those with and without L5/S interbody fusion. In addition, we analyzed the patients classified into short-level (n=111) and multi-level fusion groups (n=30).Results: Overall, the L5/S interbody fusion rate was 70% (short-level, 78%; multi-level, 40%). Age and pre- and post−preoperative L5/S disk angle were significantly different in each fusion level group. DISH presence, grade 2 osteotomy, and postoperative VAS and JOA scores were significantly different in the short-level fusion group, whereas PI was significantly different in the multi-level fusion group.Conclusions: Incomplete union after L5/S PLIF correlates with advanced age, many fusion levels, and a large value of preoperative and a small value of post−preoperative L5/S disk angles.