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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.
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 $7500{\AA}$.
상측분절시신경형성부전 환자와 정상안압녹내장 환자의 망막신경섬유층 두께 비교
김주현,강신희,박주현,이가영,Joo Hyun Kim,Shin Hee Kang,Joo Hyun Park,Kayoung Yi 대한안과학회 2013 대한안과학회지 Vol.54 No.2
Purpose: To analyze the peripapillary retinal nerve fiber layer (RNFL) in superior segmental optic hypoplasia (SSOH) patients and normal tension glaucoma (NTG) patients with inferior visual field defects using optical coherence tomography (OCT). Methods: Ten eyes of 10 patients with SSOH and 10 eyes of 10 patients with NTG were evaluated. The peripapillary RNFL thickness measured by OCT was compared between the 2 groups. Results: The mean RNFL thickness was not significantly different between SSOH patients (79.60 ± 12.54 μm) and NTG patients (77.10 ± 8.52 μm) (p = 0.089). Among the quadrant parameters, there were no significant differences between the 2 groups (p > 0.05). In a clock-hour analysis, the peripapillary RNFL thickness of the NTG group was significantly thicker than the SSOH group in 12, 1, and 2 o’clock (p = 0.029, 0.007, 0.043, respectively). In contrast, the peripapillary RNFL thickness of the SSOH group was significantly thicker than the SSOH group in 6, and 7 o’clock (p = 0.029, 0.007, respectively). Conclusions: Peripapillary RNFL thickness in patients with SSOH was thinner than in those with NTG in the superonasal region, but thicker in the inferotemporal region indicating a different retinal nerve fiber defect pattern between the 2 diseases.
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.
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.
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.
입자론의 관점에서 본 확산과 용해 개념에 관련된 과학 교과서 및 인터넷 자료 분석과 컴퓨터 수업 보조자료의 개발
김주현,이동준,김선경,강성주,백성혜,Kim, Ju Hyun,Lee, Dong Jun,Kim, Sun Kyoung,Kang, Seong Joo,Paik, Seong Hey 대한화학회 2000 대한화학회지 Vol.44 No.6
이 연구에서는 확산과 용해에 관련된 3~12학년의 과학교과서와 여러 문헌 자료들, 인터넷 사이트들을 분석하였다. 이 자료들로부터, 교과서에 제시된 확산과 관련된 설명들이 용해, 상태변화, 분출과 혼동되어 사용되고 있었으며 매질과의 충돌 또한 고려되고 있지 않았다는 것을 알았다. 그리고 용해와 관련된 거의 모든 자료도 용해의 원리를 인력에 의한 영향으로 설명하지 못하고 있었으며, 거의 대부분 용해에 관한 설명이 개념의 이해보다는 계산 문제 풀이에 초점이 맞추어져 있었다. 또한, 각종 인터넷 사이트들도 단편적인 교과서의 나열 수준에서 벗어나지 못하였고 단지 시청각적인 효과에 치중하고 있었다. 화학이 입자론적 관점에서 자연현상을 이해해야 함에도 불구하고 대부분의 교과서와 인터넷 사이트들은 그것을 충분히 반영하지 못하고 있었다. 이에 이 연구에서는 올바른 과학적 개념을 형성하고 입자론적인 관점에서 미시세계를 거시적 자연현상과 연결시키고자 했다. 그 방법으로 움직이는 물체를 표현할 수 있는 컴퓨터의 장점을 최대한 활용하여 입자이동의 관점으로 확산과 용해와 관련된 수업보조자료를 개발하였다. In this study we analysed 3-12 grade science textbooks, many literatures and internet sites related to diffusion and dissolution concepts. From these data, we discovered that the explanations of diffusion that used in textbooks are not considered the site of collision with mediums, and confused with dissolution, state transition and effusion. In the case of dissolution, almost analysis data were short of the explanations of interaction effect. Most of all, the focus of dissolution explanations was to solve the calculation problems rather than to understand the concept. Every internet site was poor, just as the level of showing textbook contents with computer, so the only effect of using computer was the sense of sight and hearing. Chemistry must be understood nature phenomena with a view point of particle theory, but many textbooks and Internet sites didn't represent it sufficiently. We set up the correct scientific concept and linked micro world of particle theory with macro world of nature phenomena. With a use of computer which have the advantage of representing moving things, we developed the computer-assisted instruction programs related to diffusion and dissolution with the viewpoint of particle movement.
정중흉골절개하 경심낭적 기관지 흉막누공의 폐쇄 치험 1예
김주현,이재원,Kim, Ju-Hyeon,Lee, Jae-Won 대한흉부심장혈관외과학회 1986 Journal of Chest Surgery (J Chest Surg) Vol.19 No.3
Total anomalous pulmonary venous connection is relatively rare cyanotic congenital heart diaease, which represents 1-4% of all congenital cardiac defects. Generally in the majority cases, severe heart failure and cyanosis develops in the early infancy. Because of high mortality in the untreated infants and surgical risk, there are still many things to be improved. Two patients with total anomalous pulmonary venous connection are presented, which we recently experienced. The one was 10 year old female with supracardiac type drained through left innominate vein, and survived the operation and continuous to do well for 1 year. The other 5 year old female with mixed type (right pulmonary vein drained via coronary sinus and left pulmonary vein through left innominate vein) was operated successfully under hypothermia and extracorporeal circulation, and followed up for 6 months without problem. It was very rare case in the literature.