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김동하 ( Dong Ha Kim ),이갑석 ( Kap Sok Li ),서성준 ( Seong Jun Seo ),조선진 ( Sun Jin Jo ),임현우 ( Hyeon Woo Yim ),김철민 ( Churl Min Kim ),김규한 ( Kyu Han Kim ),김도원 ( Do Won Kim ),김문범 ( Moon Bum Kim ),김진우 ( Jin Woo Ki 대한피부과학회 2012 대한피부과학회지 Vol.50 No.3
Background: Atopic dermatitis (AD) is a chronic, relapsing inflammatory skin disease with genetic and environmental backgrounds. While the prevalence of AD is increasing, many patients lack accurate information and understanding about AD. Objective: This study was performed to investigate the understanding of AD among Korean AD patients. Methods: We developed a survey instrument to assess patient understanding of AD. Surveys were conducted over a 6-month period (from May 2010 to October 2010) among 415 patients with AD who visited 10 dermatology clinics at a university teaching hospital affiliated with the Korean Atopic Dermatitis Association. Results: We identified points of understanding in Korean AD patients, such as knowledge and attitudes about AD, awareness of AD treatment, reliability of health care providers and information sources, and acting with AD treatment. As the results of this survey, it was confirmed that the patients` understanding of the cause and prognosis of AD was relatively inadequate, and it could be seen that the perception of the negative attitude toward the medical treatment of AD and inconveniences caused by AD was high. However, the results of the survey on the perception about the medical treatment methods of AD showed that they perceived medical doctors` treatment and prescriptions to have the best curative value, and as the criteria for choosing the treatment methods for AD, they chose the curative value rather than safety and cost. With regard to the information source for AD, they evaluated the treatment postscript on the internet sites and reliability of news media more highly than other information sources, and they responded that the main channel through which they obtain information related to AD was the medical doctors` explanations. Conclusion: We conducted the first systematic questionnaire survey to assess the understanding of AD among Korean AD patients. The results of this survey indicate that in the education and promotion on AD patients, additional education with regard to the cause and prognosis of AD is needed, and it is considered that efforts should be made to reduce the negative perception of AD through smooth communication with the medical team. In education and promotion related to AD, treatment postscripts on news media and the internet sites should also be addressed. Ultimately, the patients` self-discipline capabilities should be reinforced through proper education and development of programs related to AD. (Korean J Dermatol 2012;50(3):201~211)
압축 공기 냉각을 이용한 자기 변형 액추에이터의 위치 추종 성능 향상
곽용길,황진동,김철민,김선호,안중환,Kwak, Yong-Kil,Hwang, Jin-Dong,Kim, Churl-Min,Kim, Sun-Ho,Ahn, Jung-Hwan 한국생산제조학회 2007 한국생산제조학회지 Vol.16 No.4
Precision positioning system with magnetostrictive actuator(MA) has widely used in manufacturing devices to control the positioning accuracy to meet the high load and stroke requirements. It has many advantage in comparison with piezoelectric actuator; high force, high strain, high efficient etc. But, the performance of Terfenol-D, the commercially available magnetostrictive material, is highly dependent on the prestress, magnetic field intensity and temperature. This paper present an experimental investigation of the temperature effect on displacement characteristics of magnetostrictive actuator. In this paper, compressed cold air is proposed to improve of positioning accuracy of magnetostrictive actuator. The compressed cold air cooling system has good cooling effect Experimental results confirming the effectiveness of the proposed cooling system as high precision positioning system are also has presented in this paper.
압축 공기 냉각을 이용한 자기 변형 액추에이터의 위치 추종 성능 향상
곽용길(Yong Kil Kwak),황진동(Jin Dong Hwang),김철민(Churl Min Kim),김선호(Sun Ho Kim),안중환(Jung Hwan Ahn) 한국생산제조학회 2007 한국생산제조학회지 Vol.16 No.4
Precision positioning system with magnetostrictive actuator(MA) has widely used in manufacturing devices to control the positioning accuracy to meet the high load and stroke requirements. It has many advantage in comparison with piezoelectric actuator; high force, high strain, high efficient etc. But, the performance of Terfenol-D, the commercially available magnetostrictive material, is highly dependent on the prestress, magnetic field intensity and temperature. This paper present an experimental investigation of the temperature effect on displacement characteristics of magnetostrictive actuator. In this paper, compressed cold air is proposed to improve of positioning accuracy of magnetostrictive actuator. The compressed cold air cooling system has good cooling effect Experimental results confirming the effectiveness of the proposed cooling system as high precision positioning system are also has presented in this paper.