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          FeMn / NiFe에서 Laser 열처리에 의한 자구연구

          최상대(S. D. Choil),김선욱(S. W. Kim),진대현(D. H. Jin),이미선(M. S. Lee),안진희(J. H. Ahn),주호완(H. W.O Joo),김영식(Y. S. Kim),이기암(K. A. Lee),이상석(S. S. Lee),황도근(D. G. Hwang) 한국자기학회 2004 韓國磁氣學會誌 Vol.14 No.6

          교환결합된 NiFe/FeMn 이중박막에서 Laser 열처리를 통하여 국소적인 자화반전을 연구하였다. 600 G의 외부 자기장을 시편에 가하면서 DPSS Laser로 자화 반전시켰으며, 300 ㎽에서 15분 동안 국소적인 부분을 조사하였다. 국소적으로 자화반전 시킨 박막을 다시 원래 방향으로 역 반전시켜 자기저항(MR)곡선 피크가 감소된 것을 관찰하였다. 이는 직접적으로 Laser를 가한 박막의 손상과 계면에서 내부 확산에 의한 것으로 생각된다. 국소적인 반전 자화의 자구구조는 MFM을 통하여 관찰하였다. 자화반전 영역에서 새로운 자구벽을 형성하였으며, Laser가 조사된 영역근처에서 자구벽이 형성된 것을 관찰하였다. We have studied local magnetization reversal by laser annealing in exchange biased NiFe/FeMn bilayer. Local magnetization reversal was performed by using the DPSS laser under external magnetic field of 600G. When the laser illuminated the patterned film with the power of above 300 ㎽ during 15 min, a magnetoresistance (MR) curve with symmetric peaks at the opposite field was obtained due to the local reversal of exchange biasing. The direction of exchange anisotropy in the locally reversed region can be restored by local laser annealing under alternating magnetic field, even if its MR peak was reduced by the damage and interdiffusion. The magnetic domain structure of the locally reversed region was measured by MFM. The new domains were generated by laser annealing near the exposed area.

        • 신경회로망과 시각정보처리

          김욱현,이미선,손진우,Kim, W.H.,Lee, M.S.,Sohn, J.W. 한국전자통신연구원 1993 전자통신동향분석 Vol.8 No.3

          인간이 외계로부터 정보를 입수하는 경로는 사각기관 이외에 청각, 촉각 등 여러 감각기관이 있으나, 시각기관을 통하여 입수하는 정보가 전체 정보량의 70% 이상이라고 한다. 이와 같이 시각기관을 통하여 이루어지는 정보처리 결과는 우리 인간의 의사 결정에 크나큰 비중을 차지하고 있다. 본 고에서는 우리 인간을 비롯, 고등동물의 안구와 대뇌 시각피질의 시각계에서 일어나고 있는 시각정보처리 메카니즘에 대해서 소개하고자 한다.

        • 대규모 원단 도매 시장에서의 포름알데히드 노출에 관한 연구

          최상준,백남원,김지현,이미선,황정희,정현희,이은희,최연기,양윤정,이태범,이경민,공정옥,이영미 서울대학교 보건대학원 2001 서울大學校 保健環境硏究所論叢 Vol.11 No.1

          This study was conducted to assessment airborne formaldehyde concentration at dry-goods stores, 'G' market and additionally at the reconstructed lecture room in the university during November, 2001. 'NIOSH 2016' method, with 2,4-DNPH treated silica gel sampler and HPLC, was used for sampling and analysis of formaldehyde concentration. Because every merchant rejects to participate in study, volunteers, pretend to customer, were involved to monitor personal exposure level. The results are summarized as follows ; 1. The geometric mean(GM) and geometric standard deviation(GSD) of TWA concentrations from 'G' market were 0.037 ppm and 2.17 respectively. 2. The TWA concentrations of the personal samples from 'G' market ranged from 0.009 to 0.065 ppm and those of the area samples from '' market ranged from 0.06 to 0.071 ppm. 3. The TWA concentrations of the area samples from reconstructed lecture room ranged from 0.022 to 0.094 ppm. The TWA concentration from latest reconstructed lecture room was higher than that of older reconstructed lecture room. 4. All of samples except one were exceeding NIOSH TWA criteria, 0.016 ppm.

        • 대학생의 아이돌 애착 경험

          강민지,구영민,박소진,박수빈,박혜원,원유영,차민희,김석선,이미선 이화여자대학교 간호학회 2018 이화간호학회지 Vol.- No.52

          Purpose: The purpose of this study was to obtain comprehensive understanding of Korean university students’; experience having attachment to Idol. The findings of this study will help find nursing method to improve quality of mental health of university students. Method: Max van Manen’s hermeneutical phenomenology was adopted for the study. 8 participants were recruited using Random Sampling method: aged from 17 to 24 years old. Data came from in-depth, semi-structured interviews. Max van Manen’s 4 steps method for data analyzing were adopted. Result: The analysis produced five themes: 'Fall into Idol for the first time', 'Affection that infinitely penetrates one's heart', 'Secure attachment towards Idol leads to the route of happiness', 'Exhausted lives due to Insecure attachment towards Idol', 'Idol, who is actually in the other world' Conclusion: These results presented that university students could gain psychological stability through fan activity, and consider it as a leisure activity. Meanwhile, they spent a lot of money and time due to an obsession with Idol, and felt negative emotions like skepticism or isolation because of the one-way relationship with Idol. Thus, Mental health professionals need to encourage university students who are attached to Idol to build relationships based on reality, and provide mental health counseling to help them handle emotional stress.

        • 북한이탈 간호대학생의 생활 경험

          서혜린,신효경,윤수진,이은주,정혜원,최수민,신수진,이미선 이화여자대학교 간호학회 2018 이화간호학회지 Vol.- No.52

          Purpose: The purpose of this study was to understand the life experiences of North Korean nursing students at a university in South Korea Methods: The participants of this study were 7 North Korean defector nursing students. The data were collected through individual in-depth interviews. All interviews were audio-taped and verbatim transcripts were made for the analysis. The collected data were analyzed through the van Manen's Hermeneutical Phenomenological method (1990). Results: On the analysis of 7 research participant’s interview, their life can be expressed as ‘The concealment of oneself from being seen as stranger’, ‘Having hard time learning due to academic background differences’, ‘Receiving support in South Korea and trying to give to society’, ‘Satisfied with the systems different from the North Korea’, ‘Still influenced by life in North Korea.’ Conclusion: This study provided a deep understanding of the life experiences of North Korean defector students who majored in nursing. In addition, this study suggested a need for development of support programs for North Korean defector nursing students and additional nursing education methods for them. Also this study is significant that it provides a basis to help South Koreans better understand North Korean defector nursing students’ life. Therefore, this study can relieve the difficulties of North Korean defector nurses when they perform their duties with South Korean nurses.

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