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김주현,김상준,김강민,심채경,손동훈,KIM JOO HYEON,KIM SANG JOON,KIM KANG-MIN,SIM CHAE KYUNG,SON DONG HOON 한국천문학회 2004 天文學論叢 Vol.19 No.1
We have carried out the high-resolution spectroscopic observations of Titan using BOES (Bohyunsan Echelle Spectrometer) to establish a standard spectral atlas of Titan. The observations were made on November 3, 4, 16 and 17, 2003 using a 300 11m fiber optics with a spectral resolving power of 30,000. The spectral atlas will be served as a reference for the future spectroscopic researches of Titan and other planetary objects. We were able to confirm $CH_4$ absorption lines of the Kuiper bands, and find unidentified lines near $7500{\AA}$.
백색광 LED를 사용한 독서등의 최적 색온도에 따른 사람의 시력 변화 연구
김주현,장원범,이석환,정광교,김동현,김정미,류재준,문성득,이승현,고영수,허산,장미나,정창호,장지호,Kim, Juhyun,Chang, Wonbeom,Lee, Seokhwan,Jung, Kwangkyo,Kim, Donghyun,Kim, Jeongmi,Ryu, Jaejun,Moon, Seongdeuk,Lee, Seunghyun,Ko, Youngsu,Huh, Sa 한국전기전자재료학회 2013 전기전자재료학회논문지 Vol.26 No.1
White light emitting diode (LED) determined the most appropriate color temperature in reading lighting evaluated fatigue degree of eye according to color temperature. The eye fatigue degrees are determined by brightness and color temperature. Therefore, we measured the results of eyes test according to the change of color temperature and brightness. Experiments except for astigmatic corrected visual acuity of 0.8 more and age 20 to 25 years old, male and female college students was conducted in 100 patients. And constant illumination conditions, visual acuity was measured by varying the color temperature. The optometry at 10 minutes in the darkroom adapted eye. And then the temperature of $25{\pm}3$ degrees, the humidity was carried out at $50{\pm}5%$. As a result of typical color temperature of white light (5,600 K) has identification of the readability.
김주현,류청매,스리니바산 사티야라지,김명겸,김상용,위지향,임완택,Kim, Ju-Hyeon,Liu, Qing-Mei,Srinivasan, Sathiyaraj,Kim, Myung Kyum,Kim, Sang Yong,Wee, Ji-Hyang,Im, Wan-Taek The Microbiological Society of Korea 2018 미생물학회지 Vol.54 No.4
A Gram-positive, rod-shaped, ivory colored, and motile, Lactobacillus koreensis 26-25 was isolated from Korean kimchi. Strain 26-25 showed the ability of conversion from major ginsenosides into minor ginsenosides for which whole genome was sequenced. The whole genome sequence of Lactobacillus koreensis 26-25 consisted of one circular chromosome comprised of 3,006,812 bp, with a DNA G + C content of 49.23%. The whole genome analysis of strain 26-25 showed many glycosides hydrolase genes, which may contribute to identify the genes responsible for transformation of major ginsenosides into minor ginsenosides for its high pharmacological effects. 김치로부터 분리한 Lactobacillus koreensis 26-25 균주의 유전체서열을 분석하였다. 균주 26-25의 유전체는 G + C 비율이 49.23%이며, 2,720개의 유전자와 2,556개의 단백질 코딩 유전자, 85개의 위유전자 그리고 78개의 RNA 유전자를 포함한 단일 원형 염색체로 구성되었으면 그 크기는 3,006,812 bp였다. 균주 26-25는 인삼사포닌의 당 분해에 관여하는 여러 타입의 글라이코시다제 유전자를 가지고 있었다. 이러한 지놈 분석은 주요 진세노사이드가 우수한 약리학적 활성의 미량 진세노사이드로 전환하는데 관여하는 유전자 특징을 이해하는데 큰 기여가 되었다.
Top-down 방식의 열분해질량분석 스펙트라 분석 및 Gram-type 세균 분류
김주현,Kim, Ju-Hyun 한국군사과학기술학회 2011 한국군사과학기술학회지 Vol.14 No.4
To apply TMAH-based Py-MS to a field biological detection system for real-time classification of cell-type, reproducible patterns of the TMAH-based Py-MS spectra was known as a critical factor for classification but was seriously disturbed by quantity of cells injected into pyro-tube. This factor is an exterior variable that could not be complemented by improving the performance of the TMAH-based Py-MS instrument. One of idea to solve the knotty problem has been flashed from "Top-down proteomics for identification of intact microoganisms". That is, biomarker peaks are selected from complicate Py-MS spectra for intact microoganisms by tracing out their origins, based on Py-MS spectra for the featured components of different cell-types, in Top-down approach. This idea has been tested in classification of different Gram-type microoganisms. Through the analyses of spectra for the featured components - peptidoglycan and lipoteichoic acid for Gram-positive cells and lipopolysaccharide and lipid A for Gram-negative cells - with comparing to the spectra the corresponding Gram-type cells in the Top-down approach, biomarker peaks were selected to carry out PCA(Principal Component Analysis) in order to see classification of different Gram-types, resulting in significant improvement of their classification. Furthermore, weighting biomarker peaks on intact cell's spectra, based on the data for the featured components of the Gram-types, contributed to elevate classification performance.
김주현,김영태,Kim, Ju-Hyeon,Kim , Yeong-Tae 대한흉부심장혈관외과학회 1978 Journal of Chest Surgery (J Chest Surg) Vol.11 No.2
Twenty-two years old male was operated for spontaneous rupture of the esophagus. In the event of perforation, there is nothing to prevent wide spread dissemination, and a devastating necrotizing chemical insult occurrs which is rapidly complicated by anaerobic and aerobic infection which quickly jeopardizes the patient`s life, often with a fatal result. For these reasons and despite modern diagnostic aids, anesthetic and operative technics, and antibiotics, perforation of the esophagus is still an alarming accident. In this case, thoracotomy and surgical closure of the perforation resulted in satisfactory outcome except postoperative fistula, which healed spontaneously.
김주현,홍기우,김영태,Kim, Joo-Hyun,Hong, Gi-U,Kim, Yeong-Tae 대한흉부심장혈관외과학회 1977 Journal of Chest Surgery (J Chest Surg) Vol.10 No.2
Here represents a case of aneurysmal bone cyst which is very rare non neoplastic bone tumor especially in rib. The aneurysmal bone cyst usually arises from long bones of the upper and lower extemities and tt-e spine, which together account for 60 to 70 per cent of cases. In this case the tumor is found in right ninth rib on routine chest X-ray. It is resected successfully and the result is excellent.
결핵성 기관지협착 환자에 있어서 늑연골을 이용한 기관지성형술 치험 1례 보고-
김주현,이영탁,Kim, Ju-Hyeon,Lee, Yeong-Tak 대한흉부심장혈관외과학회 1988 Journal of Chest Surgery (J Chest Surg) Vol.21 No.4
We experienced plastic reconstruction of tuberculous bronchostenosis with patient`s rib cartilage. He suffered from coughing and sputum for 2months, and was treated for pulmonary tuberculosis 10 years ago. In preoperative bronchoscopy, left main bronchus was fibrotic obstructive and LUL bronchus was severely destructed. After thoracotomy, we harvested the rib cartilage at the 6th rib, and designed semicircular and tubular graft. And then onlayed the graft over the longitudinal bronchotomy site by simple interrupted sutures with 4-0 Vicryl Postoperative course was good, coughing and sputum disappeared. In postoperative bronchoscopy, the patch graft was good in that position, and the internal diameter was sufficient, but the granuloma was found in the stoma of LUL bronchus. He was discharged without any other event.
Kartagener 증후군을 동반한 Immotile Cilia Syndrome 의 외과적 치험 1례
김주현,박승일,Kim, Ju-Hyeon,Park, Seung-Il 대한흉부심장혈관외과학회 1988 Journal of Chest Surgery (J Chest Surg) Vol.21 No.2
Immotile cilia syndrome is a congenital structural abnormality of cilia. The structural abnormality is lack of dynein arm or defective radial spoke or microtubular transposition. In this syndrome, ciliary movement is completely absent or dyskinetic and half of this syndrome shows Kartagener`s triad. We report a 13-year-old girl who had immotile cilia syndrome with Kartagener`s triad. She had been suffering from frequent respiratory infection, hemoptysis, large amount of sputum, and sinusitis. Bronchography revealed tubular bronchiectasis in right lower lobe and that lobe was resected for treatment of bronchiectasis. Histological examination of resected bronchus showed chronic bronchiectasis and electronmicroscopically complete lack of both inner and outer dynein arms. Hospital course was uneventful and symptoms were much improved.
Group Delay를 이용한 모바일 기기용 고성능 해상도 확대기의 하드웨어 구현
김주현,박정환,최원태,강봉순,Kim, Joo-Hyun,Park, Jung-Hwan,Choi, Won-Tae,Kang, Bong-Soon 한국융합신호처리학회 2007 융합신호처리학회 논문지 (JISPS) Vol.8 No.3
본 논문에서는 bicubic 방법보다 하드웨어 구조는 간단하면서 확대 이미지는 더욱 선명한 polyphase scaler를 제안하였다. 제안된 시스템은 새로운 픽셀을 얻기 위해서 디지털 필터의 group delay를 이용하여 해상도를 확대하는 방식을 사용하였으며 bicubic 방법과 비교하여 더 좋은 성능을 가지면서 하드웨어 구조를 간단히 하여 모바일 기기 등에 쉽게 적용이 가능하도록 설계하였다. 기존 polyhpase 필터는 해상도 확대시 영상을 흐릿하게 하는 blurring 노이즈가 발생하는 문제점을 가지고 있었다. 그래서 입력 신호의 고주파 성분을 증폭시키도록 Polyphase 필터를 boost-up 필터로 수정하여 보다 선명한 결과를 얻을 수 있었다. 본 논문에서 제안하는 polyphase scaler는 Xilinx Virtex2 FPGA를 이용하여 하드웨어 검증을 수행하였다. 제안된 polyphase scaler는 핸드폰 카메라의 디지털 줌으로 사용되어 질 수 있다. In this paper, we propose that the polyphase scaler whose performance to that of the bicubic method, has less complexity in hardware structure. In order to get the new information, proposed system is based on the group delay which is one of the digital filter characteristics. The performance of this system is superior to that of bicubic algorithm which is well known. Because the hardware structure is simpler than other image scalers, we can adopt this system for mobile devices easily. The previous polyphase filters make blurring noise which is generated by up-scaling. We replace polyphase filters by boost-up filter to get vivid image. The proposed scaler is verified by Xilinx Virtex2 FPGA and is used as digital Boom in mobile camera phone.