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RISS 인기검색어
- 검색키워드
- 저자 : Akira Murai (검색결과 2 건)
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Voice Activated Wheelchair with Collision Avoidance Using Sensor Information
Akira Murai,Masaharu Mizuguchi,Masato Nishimori,Takeshi Saitoh,Tomoyuki Osaki,Ryosuke Konishi 제어로봇시스템학회 2009 제어로봇시스템학회 국제학술대회 논문집 Vol.2009 No.8
This paper develops a functional voice activated wheelchair. Various interfaces to control powered wheelchair are proposed. Since the voice is the most natural communication ways for person, our study pays attention to speech recognition. The user controls the wheelchair by the interactive operation. The wheelchair does not act based on false speech recognition. However, there is a problem that is the wheelchair collides in the wall and obstacle by delaying the voice command. Then, our system applies the collision avoidance function CAF by which wheelchair avoids the wall or obstacle without voice command by using the informatio of two kinds of sensor. CAF assists the user to control the wheelchair without colliding in the wall or obstacle. The effectiveness of our system was confirmed through the running experiment.
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Retroperitoneal Hematoma as a Serious Complication of Endovascular Aneurysmal Coiling
Murai, Yasuo,Adachi, Koji,Yoshida, Yoichi,Takei, Mao,Teramoto, Akira The Korean Neurosurgical Society 2010 Journal of Korean neurosurgical society Vol.48 No.1
Retroperitoneal hematoma (RH) due to radiologic intervention for an intracranial lesion is relatively rare, difficult to diagnose, and can be lifethreatening. We report a case of RH that developed in a patient on anticoagulant therapy following endovascular coiling of a ruptured anterior communicating artery (AcoA) aneurysm. An 82-year-old man presented with a 12-day history of headache. Computed tomography (CT) on admission demonstrated slight subarachnoid hemorrhage, and left carotid angiography revealed an AcoA aneurysm. The next day, the aneurysm was occluded with coils via the femoral approach under general anesthesia. The patient received a bolus of 5,000 units of heparin immediately following the procedure, and an infusion rate of 10,000 units/day was initiated. The patient gradually became hypotensive 25 hours after coiling. Abdominal CT showed a huge, high-density soft-tissue mass filling the right side of the retroperitoneum space. The patient eventually died of multiple organ failure five days after coiling. RH after interventional radiology for neurological disease is relatively rare and can be difficult to diagnose if consciousness is disturbed. This case demonstrates the importance of performing routine physical examinations, sequentially measuring the hematocrit and closely monitoring systemic blood pressures following interventional radiologic procedures in patients with abnormal mental status.
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