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김문석,강길선,이일우,이해방,Kim, Moon-Suk,Khang, Gil-Son,Lee, Il-Woo,Lee, Hai-Bang 한국진공학회 2007 Applied Science and Convergence Technology Vol.16 No.1
조직공학재생의학(조재학)은 생명과학과공학의 기본개념을 응용하여 생체조직을 만들고, 복원시키고, 변형시키기 위하여 새로운 디바이스나 생체조직 대용품을 만드는 학문분야이다. 조재학은 다학제간 연구개발하는 분야로써 매우 혁신적인 건강관리 및 치료 학문분야이다. 조재학의 큰 특징은 발전 속도가 빠른 첨단 과학 기술을 바탕으로 하고 있기 때문에 발전 속도가 빠르다는 점과 여러 분야의 지식과 기술을 함께 이용하기 때문에 다른 학문보다 관련 분야에 대하여 더욱 더 폭 넓은 이해를 필요로 하게 되므로 서로 다른 분야의 지식을 가진 과학자들의 협동 연구가 요구된다. 본 총설에서는 현재의 연구개발 동향 및 결과와 미래 가능성의 이해를 돕기위해 고찰하였다. Tissue engineering and regenerative medicine(TERM) is the application of principles and methods of engineering and life sciences to creat devices or biological substitutes for study, restoration, modification, and assembly of functional tissues. TERM is an emerging interdisplinary area of research and development that has the potential to revolutionize methods of health care treatment. Current status and trend of TERM's R&D is reviewed in this paper in respect to the prospective of future needs.
공침법으로 제조한 NiCoZn Ferrite의 조성 및 소결온도에 따른 자기적 특성 및 전파흡수특성
김문석(Moon Suk Kim),민의홍(Eui Hong Min),고재귀(Jae Gui Koh) 한국자기학회 2008 韓國磁氣學會誌 Vol.18 No.3
In this study, NiCoZn ferrites with the variation of sintering temperature and chemical composition were prepared by the coprecipitation. Microstructures Crystal structure of NiCoZn ferrites were analyzed by XRD and their electric magnetic characteristics were analyzed by LCR meter and their morphology observed by SEM. We identified that these powders have a typical NiCoZn spinel structure and nanoparticles average size of 40 nm. The impurity, the initial permeability and the Q factor value are the lowest of sintered NiCoZn ferrite at 1250 ℃. Also, we measured S-parameter for (Ni<SUB>0.4</SUB>Co<SUB>0.1</SUB>Zn<SUB>0.5</SUB>)Fe₂O₄ which showed a maximum reflection loss of ?3.1 ㏈ at 6 ㎓ for the 2 ㎜ thick sample. From this result, we found that the NiCoZn ferrite can be used in ferrite microwave-absorbing application at a higher frequency region (> 6 ㎓).
Fe₉₄Si₅Cr₁을 이용한 Sheet 두께에 따른 전파흡수특성 연구
김문석(Moon Suk Kim),민의홍(Eui Hong Min),고재귀(Jae Gui Koh) 한국자기학회 2009 韓國磁氣學會誌 Vol.19 No.2
The soft magnetic FeSiCr were processed the ball-mill for 30 hours and the shape of FeSiCr particles was changed from sphere to flake type, which was observed using scanning electron microscope. The complex permittivity and permeability spectra and reflection loss of FeSiCr-rubber composite was measured using Network Analyzer in order to investigate the relationship between the microwave absorption and the material constants. The matching frequency shifted toward lower frequency range with microwave absorber thickness, and microwave absorber with FeSiCr-rubber composite showed a maxium reflection loss of ?8.3 ㏈ at 1.86 ㎓ for a 1.3 ㎜ thickness.
김문석 ( Moon Suk Kim ),김남중 ( Nam Joong Kim ) 대한내과학회 2011 대한내과학회지 Vol.81 No.6
Soft tissue infections are common, generally of mild to moderate severity. The most common causative organisms of soft tissue infections are group A ß-hemolytic streptococci and Staphylococcus aureus. As the antimicrobial resistance pattern of these causative organisms has not been changed recently, the present recommendations for the treatment of soft tissue infections remain the same. In this review, we have presented extensive information on the clinical characteristics, diagnosis, and treatment of skin and soft tissue infections. We focused on two issues concerning antibiotic resistance; macrolide resistance of group A ß-hemolytic streptococci and the emergence of community-acquired methicillin-resistant Staphylococcus aureus. (Korean J Med 2011;81:699-707)
Permalloy를 이용한 이동통신주파수 대역용 박형 전파흡수체의 제조 및 특성 연구
김문석(Moon Suk Kim),민의홍(Eui Hong Min),고재귀(Jae Gui Koh) 한국자기학회 2008 韓國磁氣學會誌 Vol.18 No.3
The raw materials of permalloy were processed the ball-mill for 30 hours and the shape of permalloy particles was changed from sphere to flake type, which was observed using scanning electron microscope. The complex permittivity and permeability spectra and reflection loss of permalloy-rubber composite was measured using Network Analyzer in order to investigate the relationship between the microwave absorption and the material constants. The flake type permalloy-rubber composite showed high reflection loss, which was due to the high complex permittivity and permeability. Also, the matching frequency shifted toward lower frequency range with microwave absorber thickness, and the maximum reflection loss of ?6.1 ㏈ was observed in 1.65 ㎓~1.86 ㎓ for a 1.3 ㎜ thickness.
웹 기반의 협동작업을 위한 동기적 웹 브라우저 공유 시스템의 설계 및 구현
김문석(Moon-Suk Kim),이성제(Sung-Jae Lee),성미영(Mee-Young Sung) 한국정보과학회 2000 한국정보과학회 학술발표논문집 Vol.27 No.2Ⅱ
공간적으로 분산되어 있는 여러 작업자들이 웹 상에서 실시간으로 협력 연구할 수 있도록 하기 위해서는 기본적으로 협동작업 지원 도구인 화상회의, 전자칠판의 지원뿐만 아니라 동기적 웹 브라우저의 공유 또한 필수적이다. 본 논문에서 소개하는 동기적 웹 브라우저의 공유 시스템에서는 협동 작업자들이 주소 동기화(URL Synchronization) 및 폼 동기화(Form Synchronization)를 통해서 워드 및 파워포인트와 같은 웹 문서와 웹 데이터베이스의 내용을 공유할 수 있고 브라우저의 내용이 길어질 경우에도 스크롤 동기화(Scroll Synchronization)및 윈도우 크기 동기화(Window Size Synchronization)를 통해 문서내의 같은 부분을 공유 할 수 있다. 본 논문에서는 공간적으로 분산되어 있는 여러 작업자들이 협동작업을 위해서 상용 웹 브라우저를 이용하여 웹 문서와 웹 데이터베이스를 공유함으로써 보다 효율적인 작업을 할 수 있는 시스템을 소개한다.
김문석(Moon Suk Kim),성미영(Mee Young Sung) 한국정보처리학회 2001 정보처리학회논문지B Vol.8 No.3
Collaborative computing is an environment that allows participants to share their information synchronously or asynchronously so that they can do their job more effectively and accurately. In the past, collaborative computing has included e-mail, Internet chatting, whiteboard, videoconferencing as well as other Internet application programs. In this paper, we introduce a system in which participants can share their documents and databases through the web for more efficient collaboration. The user can host their web browser across other terminals using URL, Form, Scroll, and Window Size Synchronization. URL Synchronization controls synchronously the movement and direction of Internet browsing while Form Synchronization allows the user to show inputs on the web in real-time. Scroll Synchronization is used to control the scrolling of the web page for sharing the same part in the web browser whereas Window Size Synchronization adjusts the length and width parameters of the web browser.
공침법으로 제조한 Ni - Cu - Zn Ferrite의 Ni 첨가량과 온도에 따른 주파수 및 물리적 특성 연구
김문석(Moon Suk Kim),고재귀(Jae Gui Koh) 한국자기학회 2005 韓國磁氣學會誌 Vol.15 No.5
Ni-Cu-Zn ferrites were prepared by the co-precipitation and ferrite microwave absorbers on low temperature sintering were investigated in this work. The properties of its microwave absorbing and physical were analyzed into variations of Ni addition, calcination temperature, sintering temperature. From the analysis of X-ray diffraction patterns, we can see that all the particles have only a single phase spinel structure. In addition, the powders particle size distribution obtained the nano size. By increasing the Ni additive, the permeability of the powders was decreased and the loss factor increased at sintering temperature 1100oC. Also, we considered that it can used high frequency rage. We found that the (Ni_(0.7)Cu_(0.2)Zn_(0.1)O)_(1.02)(Fe₂O₃)_(0.98) appeared microwave absorbing properties better than other composition.