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LNAME(L-nitrow arginine methyl ester)와 MB(methylene blue)로 전처치한 토끼 대동맥환에서 Enflurane과 Desflurane 의 작용
임상호,권은정,강귀빈 대한마취과학회 1997 Korean Journal of Anesthesiology Vol.33 No.4
Background : Desflurane is a new inhaled anesthetic with the lowest blood/gas partition coefficient and enflurane is one of the major anesthetics in these days. But the effect of volatile anesthetics and the site of action on the blood vessel are still controversial. Since Furchgott(1980) discovered endothelium derived relaxing factor(EDRF) from endothelium, many investigators have studied about the relationship between the EDRF and the effect of the volatile anesthetics on blood vessels. In this study, we evaluated that the effect and the action site of enflurane and desflurane on isolated aortic rings of the rabbit. Methods : Each of obtained thoracic aorta from rabbits(1.5∼2.5 kg) was divided into 4∼6 mm rings, and a half of that were denuded. All of the aortic rings were preconstricted with phenylephrine 1.5 10-7 Mole in warm organ bath filled with modified Krebs' solution, and then LNAME(inhibitor of nitric oxide synthase, 3 10-4Mole) was administered to one group of aortic rings. MB(inhibitor of solub guanylyl cyclase, 2 10-5Mole) was administered to another one group and neither of LNAME nor MB was administered to the other group. And then enflurane(1%, 2%, 3%, 4%) or desflurane(6%, 9%, 12%) was administered to all of aortic rings. The polygraph recorded the changes of tension of aortic ring which was transmitted through the force transducer. Results : It was proved that basal EDRF was released from endothelium by the fact that intact aortic rings were more constricted after LNAME or MB administration. The intact aortic rings were constricted in all concentration of enflurane and both intact and denuded rings were maintained from control tension in all concentrations of desflurane. Conclusion : It is concluded that enflurane in all concentrations has an endothelium-mediated vasoconstriction effect and desflurane in all concentrations has no effect on isolated aortic rings of rabbit. (Korean J Anesthesiol 1997; 33: 583∼590)
사회적기업 장애인 근로자의 직장근속연수 결정요인에 관한 연구
임상호,서영건,성연옥 공주대학교 KNU 기업경영연구소 2018 기업경영리뷰 Vol.9 No.1
본 연구는 사회적기업 장애인 근로자의 직장근속연수에 미치는 영향에 대해 검증하였다. 첫째, 장애인 근로자의 직장 근속연수 결정요인은 비정규직근로, 고용계약기간(p<.01, β=.392 / β =.379)로 나타났으며, 종사자지위(p <.05, β =.343)로 나타났다. 즉, 장애인 근로자의 직장요인 중 비정규직근로, 고용계약기간, 종사자지위가 근로연수에 영향을 미치는 것을 확인 할 수 있었다. 둘째, 장애인 근로자의 직장 근속연수 결정요인에 대한 상관관계는 근속연수와 고용계약기간( .627)은 p<.01 수준에서 유의하게 나타났으며, 비정규직근로와 근속연수(.354), 사업체유지계획과 근속연수(.331), 고용계약기간과 근속연수(.414), 근속연수와 월평균임금(.258)은 p<.05 수준에서 유의한상관관계를 보이고 있다. 셋째, 장애인 근로자의 개인요인이 근속연수 결정요인에 대한 차이분석은 연령은 만20세미만이 20세~29세보다 높게 나타났고, 결혼상태는 미혼이 기혼보다 높게 나타났으며, 수입은 5천만원이상이 3천만원 이상~5천만 미만 보다 높게 나타나 p<.01의 신뢰수준에서 유의한 것으로 나타났으며, 학력은 3년제 이하 대학이 대학원(석사)보다 높은 것으로 나타나 p<.05의 신뢰수준에서 유의한 것으로 분석되었다. 본 연구는 장애인 근로자 개인요인과 직장요인에 대한 특성요인의 중요성를 파악하고 장애인 근로자의 근속연수를 높일 수 있도록 장기적이고 안정적인 고용 확대를 위한 효과적인 정책을 마련하는 데 본 연구의 의의가 있다. This study examined the effect of the social enterprises on the job tenure of workers with disabilities. First, the determinants of job tenure of disabled workers were non-regular workers and employment contract duration (p<.01, β=.392 / β=.379), and employee status (p<.05, β=.343). In other words, it was confirmed that irregular workers, duration of employment contracts, and employee status affect the working years of the disabled workers. Second, the correlation between the number of years of service and the period of employment contract (.627) was significant at the level of p <.01, and the correlation between the number of years of non - regular work and service tenure (.354) (P <.05), the number of years of service, the number of years of service, and the monthly average wage (.258). Third, the analysis of the difference of individual factors of workers with disabilities on the determinants of serviceability showed that the age of 20 years old was higher than that of 20~29 years old, the marital status was higher than that of married ones, (P <.05), and the level of academic achievement was higher than that of the graduate school (master ‘s degree) at p <.05 Respectively. The purpose of this study is to identify the importance of individual factors and worker factors for disabled workers and to establish effective policies for long - term and stable employment expansion so as to increase the working hours of disabled workers.
정밀 직교 피딩 로봇시스템 적용 롤 밴딩 공정 기술 개발
임상호,안상준,윤경열,Lim, Sang-Ho,Ahn, Sang-Jun,Yun, Gyeong-Yeol 산업진흥원 2022 산업진흥연구 Vol.7 No.4
본 연구는 기피공정중 하나인 롤밴딩 공정의 자동화시스템을 평가하였다. 그 결과 기존 1시간에 20개의 장약통을 생산하는 효율성을 1시간에 50개를 생산하는 공정으로 변화시켰다. 생산량의 평균값은 1시간당 57.6개의 생산, 반복정밀도의 오차는 0.03mm, 평균 롤 직경 오차값은 0.49mm, 평균 정렬 오차값은 0.09mm, 평균 공정리드타임은 43.21초로 나타났다. 생산성, 반복정밀도, 불량률, 얼라인 불량률, 공정 리드타임 등 구체적인 평가 방식을 제시하였다. 이를 통하여 자동화된 시스템을 검증하였다. 추후 본 연구에 수행된 내용들이 다른 자동화 시스템의 검증에 도움이 될 것으로 사료된다. This study evaluated the automated system of the roll bending process, which is one of the difficult processes. In the past, 20 cartridges were produced per hour. but Automation changed it to a process that produces 50 pieces per hour. The average value of production was 57.6 pieces per hour, error of repeatability was 0.03 mm, average roll diameter error value was 0.49 mm, average alignment error value was 0.09 mm and average process lead time was 43.21 seconds. This paper presented specific evaluation methods such as productivity, repeatability, defect rate, alignment defect rate, and process lead time. It is thought that the contents performed in this study will be helpful in the verification of other automation systems in the future.