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- 저자 : ( Takao Kawai ) (검색결과 4 건)
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Development of Knee Joint Robot for Students Becoming Therapist
Yoshifumi Morita,Yuki Kawai,Yusuke Hayashi,Tatsuya Hirano,Hiroyuki Ukai,Kouji Sanaka,Hironori Nakamuta,Keiko Takao 제어로봇시스템학회 2010 제어로봇시스템학회 국제학술대회 논문집 Vol.2010 No.10
The authors are developing a knee joint robot as an educational tool for students becoming physical therapist (PT) or occupational therapist (OT). The robot can simulate some problems of a knee joint, such as range of motion trouble, contracture, rigidity, spasticity and so on. The robot has a knee joint mechanism to realize not only flexion/extension movement but also inner/outer rotation movement, which is based on the idea of rolling, sliding and coming off movement. In addition the robot has the wire drive system to control the knee joint passive movement. In this paper we design optimal arrangement of four pulleys in the wire drive system by introducing performance indices. In addition we design control algorithms to imitate two kinds of knee joint troubles and verify the effectiveness by fundamental experiments.
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( Dai Kojima ),( Hiroshi Nakai ),( Tetsuo Kobayashi ),( Kenichi Ushikoshi ),( Masahiro Ogura ),( Shoaki Ide ),( Takao Kawai ) 한국폐기물자원순환학회 2002 APLAS Vol.2002 No.2
대부분 소각잔류물이 매립된 매립지 침출수 처리시설부터 배출된 응집슬러지의 다이옥신은 열적 탈염소 과정(Hagenmaier method)에 의해서 다이옥신 농도가 380pg-TEQ/g에서 0.0031 pg- TEQ/g로 99.999%이상 분해되는 것을 bench-scale 실험을 통해서 확인되었다. 소각시설에서 배출된 배가스에 의해 다이옥신이 오염된 토양은 같은 공정으로 실험이 실시되었다. 이것 또한 6,800pg-TEQ/g에서 47pg-TEQ/g로 99% 이상 분해되는 것을 알 수 있었다. 이러한 실험을 통해 얻어진 분해상태를 기초를 하여, Hagenmaier method의 분해공정과 sodium particle 분산공정 (SP process) 의 조합은 PCBs로 오염된 토양을 제거하기 위해 full-scale 입증 실험을 실시하였다. 우선, Hagenmaier method를 통해서, PCBs 물질들은 26 mg/kg에서 0.0038 mg/kg로 다이옥신은 130pg - TEQ/g에서 0.22 pg-TEQ/g로 분해되어졌다. 열적 탈염화장치로부터 발생한 배가스 mist에 포함된 미량오염 물질은 가스 방지시설공정에 cleaning oil에 흡착되었다. 오염된 oil에 존재하는 PCBs와 다이옥신류는 SP 공정을 통해 각각 PCBs의 경우 9.8 mg/kg에서 0.056 mg/kg로, 다이옥신류의 경우 1.7 pg-TEQ/g에서 0.22 pg- TEQ/mg로 분해되었다. 이런 조합된 시스템은 오염된 토양에서의 PCBs의 경우 99.9%이상 다이옥신은 99.3%이상의 높은 분해능을 확인할 수 있었다. A bench-scale test had confirmed that dioxins in the coagulation sludge discharged from the leachate treatment plant in the landfill site where mainly incineration residue is dumped could be decomposed with the thermal dechlorination process (Hagenmaier method) from 380 to 0.0031 pg-TEQ/g, or by more than 99.999%. Soil contaminated with dioxins caused by exhaust gas from an incineration plant was tested with the same process. It was also confirmed that dioxins in the polluted soil could be decomposed from 6,800 to 47 pg-TEQ/g, or more than 99%. Based on the decomposing conditions obtained from these tests, the combined decomposition process of the Hagenmaier method and sodium particle dispersion process (SP process) was examined with a full-scale demonstration test to decontaminate soils polluted with PCBs. With the Hagenmaier method first, PCBs were decomposed from 26 mg/kg to less than 0.0038 mg/kg, and dioxins from 130 to less than 0.22 pg-TEQ/g. The trace contaminant contained in mist included in the gas exhausted from the thermal dechlorination equipment was then absorbed with gas cleaning oil in the gas cleaning unit. The PCBs and dioxins in this contaminated oil were decomposed with the sodium particle dispersion process respectively to 0.056 mg/kg and 0.22 pg-TEQ/g from 9.8 mg/kg and 1.7 pg-TEQ/g. This combined system was confirmed to have as high decomposability for decomposition of PCBs in contaminated soil as more than 99.9%, and dioxins as 99.3%.
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THE TREATMENT OF DIOXINS AND PCBS IN POLLUTED SOLIDS
( Dai Kojima ),( Hiroshi Nakai ),( Tetsuo Kobayashi ),( Kenichi Ushikoshi ),( Masahiro Ogura ),( Shoaki Ide ),( Takao Kawai ) 한국폐기물자원순환학회 2002 APLAS Vol.2002 No.1
A bench-scale test had confirmed that dioxins in the coagulation sludge discharged from the leachate treatment plant in the landfill site where mainly incineration residue is dumped could be decomposed with the thermal dechlorination process (Hagenmaier method) from 380 to 0.0031 pg-TEQ/g, or by more than 99.999%. Soil contaminated with dioxins caused by exhaust gas from an incineration plant was tested with the same process. It was also confirmed that dioxins in the polluted soil could be decomposed from 6,800 to 47 pg-TEQ/g, or more than 99%. Based on the decomposing conditions obtained from these tests, the combined decomposition process of the Hagenmaier method and sodium particle dispersion process (SP process) was examined with a full-scale demonstration test to decontaminate soils polluted with PCBs. With the Hagenmaier method first, PCBs were decomposed from 26 mg/kg to less than 0.0038 mg/kg, and dioxins from 130 to less than 0.22 pg-TEQ/g. The trace contaminant contained in mist included in the gas exhausted from the thermal dechlorination equipment was then absorbed with gas cleaning oil in the gas cleaning unit. The PCBs and dioxins in this contaminated oil were decomposed with the sodium particle dispersion process respectively to 0.056 mg/kg and 0.22 pg-TEQ/mg from 9.8 mg/kg and 1.7 pg- TEQ/g. This combined system was confirmed to have as high decomposability for decomposition of PCBs in contaminated soil as more than 99.9%, and dioxins as 99.3%.
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Sanuki, Takuro,Mishima, Gaku,Kurata, Shinji,Watanabe, Toshihiro,Kiriishi, Kensuke,Tachi, Mizuki,Ozaki, Yu,Okayasu, Ichiro,Kawai, Mari,Matsushita, Yuki,Miura, Keiichiro,Ayuse, Takao The Korean Dental Society of Anesthsiology 2015 Journal of Dental Anesthesia and Pain Medicine Vol.15 No.3
Background: We hypothesized that ketamine, when administered as the anesthetic induction agent, may prevent cardiovascular depression during high-dose remifentanil administration, unlike propofol. To test our hypothesis, we retrospectively compared the hemodynamic effects of ketamine, during high-dose remifentanil administration, with those of propofol. Methods: Thirty-eight patients who underwent oral surgery at the Nagasaki University Hospital between April 2014 and June 2015 were included in this study. Anesthesia was induced by the following procedure: First, high-dose remifentanil ($0.3-0.5{\mu}g/kg/min$) was administered 2-3 min before anesthesia induction;next, the anesthetic induction agent, either propofol (Group P) or ketamine (Group K), was administered. Mean arterial pressure (MAP) and the heart rate were recorded by the automated anesthesia recording system at four time points: immediately before the administration of high-dose remifentanil (T1);immediately before the administration of propofol or ketamine (T2);2.5 min (T3), and 5 min (T4) after the administration of the anesthetic induction agent. Results: In Group P, the MAP at T3 ($75.7{\pm}15.5mmHg$, P = 0.0015) and T4 ($68.3{\pm}12.5mmHg$, P < 0.001) were significantly lower than those at T1 ($94.0{\pm}12.4mmHg$). However, the MAP values in the K group were very similar (P = 0.133) at all time points. The heart rates in both Groups P (P = 0.254) and K (P = 0.859) remained unchanged over time. Conclusions: We showed that ketamine, when administered as the anesthetic induction agent during high-dose remifentanil administration, prevents cardiovascular depression.
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