FTS법을 이용한 ITO박막의 제작

김건희,금민종,김한기,손인환,장경욱,이원재,최형욱,박용서,김경환,Kim, Geon-Hi,Keum, Min-Jong,Kim, Han-Ki,Son, In-Hwan,Jang, Kyung-Wook,Lee, Won-Jae,Choi, Hyung-Wook,Park, Yong-Seo,Kim, Kyung-Hwan 한국전기전자재료학회 2004 전기전자재료학회논문지 Vol.17 No.11

The ITO thin films were prepared by the FTS(Facing Targets Sputtering) system. The ITO thin films are deposited by changing the input current and working gas pressure. Then, electric characteristics, transmittance and surface roughness of ITO thin films were measured by Hall effect measurement, UV-VIS spectrometer and AFM. As a result, the ITO thin film was fabricated with resistivity 6xl0$^{-4}$ Ωㆍcm, carrier mobility 52.11 $\textrm{cm}^2$/Vㆍsec, carrier concentration 1.72 x $10^{20}$ $cm^{-3}$ transmittance over 85 % of ITO film at working gas pressure 1 mTorr and input current 0.6 A.

천체관측용 적외선 광학계 초정밀 가공

김건희,진호,양순철,김명상,국명호,이성호,육인수,Kim, Geon-Hee,Jin, Ho,Yang, Sun-Chol,Kim, Myung-Sang,Kook, Myung-Ho,Lee, Sung-Ho,Yuk, In-Soo 한국천문학회 2007 天文學論叢 Vol.22 No.3

The KASINICS (Korea Astronomy and Space science Institute Near Infrared Camera System) is a ground-based near-infrared (NIR) imaging instrument. KASINICS has offner relay optics to reduce unwanted infrared light. For the offner optics, we adopted an ultra precision machining process which is installed at KBSI (Korea Basics Science research Institute). Since the offner relay optics is made of aluminum 6061 metal material, we did several tests to reach the specification. We found that a 0.497mm radius nose bite and 220m/min machining speed are best tool and condition to make this offner optics with the precision machine. In this paper, we report the technical method of ultra precision machining and results of the KASINICS offner optics.

국내 온라인 유통 새우 제품의 종판별 및 표시사항 모니터링 연구

김건희,이지영,강태선,Kun Hee Kim,Ji Young Lee,Tae Sun Kang 한국식품위생안전성학회 2023 한국식품위생안전성학회지 Vol.38 No.6

본 연구는 대한민국 온라인 시장에서 판매되는 48개의 새우 제품의 종판별 및 제품 표시 사항 일치 여부를 조사하였다. 사용 원재료의 종 판별을 위해 cytochrome c oxidase subunit I 유전자의 염기서열을 분석하여 NCBI GenBank 및 BOLD system 데이터베이스에 등록된 생물종의 염기서열과 비교하였다. 또한 계통분석을 수행하여 동정된 새우종을 추가로 검증했다. 종판별 결과 총 16종[흰다리새우(Penaeus vannamei, Whiteleg shrimp or Pacific white shrimp), 북쪽분홍새우(Pandalus borealis, Alaskan pink shrimp), 그라비새우(Palaemon gravieri, Chinese ditch prawn), 돗대기새우(Leptochela gracilis, Lesser glass shrimp), 얼룩새우(Penaeus monodon, Giant tiger prawn), 아르헨티나붉은새우(Pleoticus muelleri, Argentine red shrimp), 산모양깔깔새우(Metapenaeopsis dalei, Kishi velvet shrimp), 태평양난바다곤쟁이(Euphausia pacifica, Isada krill), 가시배새우(Lebbeus groenlandicus, Spiny lebbeid), 꽃새우(Trachypenaeus curvirostris, Southern rough shrimp), 진흙새우(Argis lar, Kuro shrimp), 가시발새우(Metanephrops thomsoni, Red-banded lobster), 깔깔새우(Metapenaeopsis barbata, Whiskered velvet shrimp), 긴발딱총새우(Alpheus japonicus, Japanese snapping shrimp), 대하(Penaeus chinensis, Fleshy prawn), 긴뿔민새우(Mierspenaeopsis hardwickii, Spear shrimp)]이 확인되었으며, 흰다리새우(n=22, 45.8%)가 가장 큰 비중을 차지하였다. 일반명 '새우'를 포함하는 35개 제품(72.9%)에서 표시사항과 불일치를 나타내었으며, 일반명(n=30)을 제외할 경우 불일치율은 10.4%로 낮아졌다. 가공 정도별 불일치율은 다중 가공 제품(n=25, 89.3%)이 단순 가공 제품(n=10, 50%)보다 높은 비율을 보였다. 원산지별 분석 결과 특정 국가와 불일치율과의 상관성은 확인할 수 없었다. 본 연구 결과는 향후 새우 제품의 모니터링 수행 및 새우의 국명 표시 개선을 위한 기초자료로 쓰일 수 있을 것이다. This study investigated species identification and labeling compliance of 48 shrimp products sold in the Korean online markets. Species identification was conducted using the standard DNA barcoding method, using the cytochrome c oxidase subunit I gene. The obtained sequences were compared with those deposited in the NCBI GenBank and BOLD Systems databases. Additionally, phylogenetic analysis was performed to further verify the identified shrimp species. Consequently, 16 shrimp species were identified, including Penaeus vannamei, Pandalus borealis, Palaemon gravieri, Leptochela gracilis, Penaeus monodon, Pleoticus muelleri, Metapenaeopsis dalei, Euphausia pacifica, Lebbeus groenlandicus, Trachypenaeus curvirostris, Argis lar, Metanephrops thomsoni, Metapenaeopsis barbata, Alpheus japonicus, Penaeus chinensis, and Mierspenaeopsis hardwickii. The most prevalent species was Penaeus vannamei, found in 45.8% of the analyzed products. A significant mislabeling rate of 72.9% was found; however, upon excluding generic names such as shrimp, the mislabeling rate reduced to 10.4%. The mislabeling rate was higher in highly-processed products (89.3%) compared with that in minimally-processed products (50%). No correlation was found between the country of origin and mislabeling rate. The results of this study provide crucial data for future monitoring of shrimp products and improving the labeling of shrimp species in Korea.

Optimum Manufacturing Processes of Micro-drill

김건희,Kim, Gunhoi The Korean Society of Manufacturing Process Engine 2002 한국기계가공학회지 Vol.1 No.1

Resently, reduction of industrial products in size and weight has increased by the application of micro-drill for gadgets of high precision and gave rise to a great interest in a micro-drilling. Due to the lack of tool stiffness and the chip packing, micro-drilling requires not only the robust tool structure which has not affected by the vibration, but also the effective drilling methods designed to prevent tool fracture from cutting troubles. Firstly, this paper presents a new manufacturing process of micro-drill for improving the product rate and an optimum shape of micro-drill for lengthening the tool life, and secondly suggests between tool life and drilling torque acquired in the inprocess monitoring system.

정전용량센서를 이용한 대구경 비구면 형상의 기상측정에 관한 연구

김건희,원종호,Kim, Geon-Hee,Won, Jonh-Ho 한국기계가공학회 2003 한국기계가공학회지 Vol.2 No.3

This paper described about on-machine profile measurement of aspheric surfaces using contact probing technique in ultra precision machine. A contact probe has been designed as a sensing device to obtain measuring resolutions in nanometer regime using a circle leaf spring mechanism and a capacitive-type sensor. The contact probe which is installed on the z-axis is In touch with the aspheric objects which is fixed on the spindle of the diamond turning machine(DTM) during the measuring procedure. The x, z-axis motions of the machine are monitored by a set of two orthogonal plane mirror type laser interferometers. As a results, the developed contact probe on-machine measurement system showed 10 nanometers repeatability with a ${\pm}2{\sigma}$ and uncertainty of 200 nmPv.

MPEG-4 비디오 스트림의 디지털 저작권 관리를 위한 암호화 기법 연구

김건희,신동규,신동일,Kim Gunhee,Shin Dongkyoo,Shin Dongil 한국정보처리학회 2005 정보처리학회논문지 C : 정보통신,정보보안 Vol.12 No.2

본 논문에서는 MPEG-4 스트림의 디지털 저작권 관리(DRM)를 위한 암호화 방법을 제안한다. MPEG-4는 멀티미디어 스트리밍을 위한 표준이며 MPEG-4 파일 포맷에 따라 저장된다. 인가된 사용자들만 접근이 가능하도록 MPEG-4 파일 포맷으로부터 추출된 I-VOP, P-VOP의 매크로 블록(MB)들과 모션 벡터(MV)들을 암호화하는 3가지 방법을 설계하였고, MPEG-4 데이터의 암호화에는 DES(Data Encryption Standard)를 사용하였다. 이러할 암호화 방법을 기반으로 MPEG-4 데이터 스트리밍을 위한 인터넷 방송 서비스용 DRM 솔루션을 구현하고, 최적의 암호화 방법을 선택하기 위해 복호화 속도 및 영상의 품질을 비교하였다. This paper presents encryption techniques for digital right management solutions of MPEG-4 streams. MPEG-4 is a format for multimedia streaming and stored in the MPEG-4 file format. We designed three kinds of encryption methods, which encrypt macro blocks (MBs) or motion vectors (MVs) of I-, P-VOPs (Video Object Planes), extracted from the MPEG-4 file format. We used DES to encrypt MPEG-4 data Based on theses three methods, we designed and implemented a DRM solution for an Internet broadcasting service, which enabled a MPEG-4 data streaming, and then compared the results of decryption speed and quality of rendered video sequences to get an optimal encryption method.

부처손(Selaginella tamariscina) 추출물의 리파아제 저해 활성 및 지질 축적 억제 효과

김건희,이신영,이애랑,Kim, Gun-Hee,Lee, Shin-Young,Lee, Ae-Rang 한국식품영양학회 2019 韓國食品營養學會誌 Vol.32 No.1

The objective of this study was to evaluate novel usability as natural anti-obesity supplement of Selaginella tamariscina extract. The total phenol contents and total flavonoid contents were $60.29{\pm}3.11GAE\;mg/g$ and $14.90{\pm}0.34QE\;mg/g$, respectively. To evaluate anti-obesity activity of Selaginella tamariscina extract, pancreatic lipase inhibition activity as well as its inhibition effect of lipid accumulation in adipocytes were conducted by Oil Red O staining and lipolysis assay. The result of pancreatic lipase inhibition activity of S. tamariscina extract showed a wide range between 40 and 73% dose dependently. While the incubation of 3T3-L1 cells with S. tamariscina extract inhibited differentiation of preadipocytes and reduced lipid accumulation, the level of released free glycerol into culturing medium was increased in multiple concentrations. These results showed that S. tamariscina extract inhibit adipogenesis and pancreatic lipase activity. Thus, S. tamariscina extract can be a candidate for regulating lipid accumulation in obesity.

제품의 고부가가치 창출등 산업 전반에 걸쳐 파급효과 증대

김건희,Kim, Geon-Hui 한국광학기기산업협회 2006 光學世界 Vol.106 No.-

21세기 들어 BT, IT, NT, ST 관련 첨단산업이 우리나라의 미래를 선도할 산업으로 새롭게 부각되고 있다. 이들 산업의 핵심 부품 가공에 다이아몬드 선반을 이용한 초정밀 가공 기술은 계속해서 활용폭이 커질 뿐만 아니라 현재보다 한 단계 더 높은 가공정도, 즉 마이크로 이하 나노단위의 초정밀 가공기술이 요구될 것이다. 따라서 우리나라의 초정밀 가공 기술 분야에서 국가적인 기술요구에 부응하고 선진국에 대한 기술경쟁력을 확보하기 위해서는 다이아몬드공구 및 연삭 휠을 이용한 초정밀 가공의 기초 기술에 대한 보다 많은 연구가 필요하다.

뽕나무(Morus alba)와 꾸지뽕나무(Cudrania tricuspidata)의 부위에 따른 항산화 활성 및 3T3-L1세포 지방축적 억제 효과

김건희,김은향,Kim, Gun-Hee,Kim, Eunhyang 한국식품영양학회 2019 韓國食品營養學會誌 Vol.32 No.2

In this study, we examined antioxidative effects and the anti-adipogenesis effect of different parts of Cudrania tricuspidata (C), and Morus alba (M). Total polyphenol contents were highest in M-root ($34.56{\pm}0.045mg\;GAE/g$), and there was no significant difference, between C-root and M-leaf. Total flavonoid contents of C-root were highest ($23.07{\pm}0.004mg\;QE/g$). To examine antioxidant activities of C and M extracts, DPPH and ABTS radical scavenging activity, and FRAP assay, was used. Results show that antioxidant activities of C and M extracts increased, in a dose-dependent manner. Adipocytes are generated by preadipocyte differentiation, during adipogenesis. Matured adipocytes accumulate in abnormal and cause obesity. We investigated effects of leaf and root extracts of C and M, on lipid accumulation, in 3T3-L1 adipocytes. Changes in cell morphology, and degrees of lipid accumulation in adipocytes, were evaluated by Oil Red O staining. Root extracts of C and M, reduced lipid content in a dose-dependent manner. Therefore, root extracts of C and M, may be good candidates for managing obesity.

간호학과 인증평가에 따른 간호교육의 질 향상 및 질 확보 노력에 대한 교수 인식

김건희,Kim, Kon Hee 연세대학교 의과대학 2011 의학교육논단 Vol.13 No.2

This study investigated faculty perceptions of the improvement and effort for achievement of the quality of nursing education through accreditation in baccalaureate nursing programs in 2006. Survey data from 190 professors of 33 accredited nursing schools were statistically analyzed using SPSS ver. 19.0 software with descriptive statistics, t-tests, and ANOVA. Through accreditation, about two-thirds of subjects perceived that the quality of education had 'improved' and the purposes of the accreditation were moderately successfully achieved (score 3.50). They also perceived their schools made a strong attempt (score 4.24) to assure quality. The perception scores of efforts to assure the quality of education varied significantly according to the characteristics of the subjects, the existence of a university hospital, the type of college, and the year of school founding. There were significant differences between the level of improvement in education and the extent of effort to assure the quality of education. Accreditation contributed to improved quality of nursing education except for some issues which need more consideration. To maintain high quality, the accreditation of baccalaureate nursing programs should be performed with continuity and on a regular basis.