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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.
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,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 $7500{\AA}$.
지혜 깊어지는 건강 - 우리 아이를 위한 1분 건강 - 척추측만증 겨울방학, 아이의 척추를 점검하라
김주현,Kim, Ju-Hyeon 한국건강관리협회 2011 건강소식 Vol.35 No.12
각종 인터넷 포털 사이트를 검색하면 척추측만증에 대한 설명이 나오는데 대체로 척추측만증은 척추가 옆으로 심하게 굽은 증상. 통증은 없고 서서히 진행되는데 심하면 내장 압박을 비롯하여 여러 가지 장애를 일으키는 병으로 소개되고 있다. 하지만 척추측만증은 단순히 척추가 옆으로만 굽은 것을 말하는 것이 아니라 뒤에서 봤을 때 옆으로 만곡된 것 이외에도 척추 뼈 자체의 회전 변형을 동반한 3차원적인 척추기형을 말한다.
김주현,전민수,정용규,Kim, Ju-Hyun,Jeon, Min-Soo,Jung, Yong-Gyu 서비스사이언스학회 2011 서비스연구 Vol.1 No.1
현재 국내에선 많은 수의 사람들이 주식관련업계에 종사하고 있으며 주식관련 정보와 관련 산업은 점점 발전해 가고 있다. 따라서, 주식을 예측하는 프로그램이 많이 나왔으며, 또한 정확한 수치화를 통해 주식을 예측하고자 하는 노력들이 더해지고 있다. 그러나 주식예측 결과는 아직 불안정하고, 근거가 없는 것이 현실이다. 본 논문에서는 방대한 량의 주식 데이터를 가지고, 주식의 변동 폭에 많은 영향을 끼치는 항목들을 조사하고, 가중치를 구하고자 한다. 이는 기존에 주식에 관련된 수치와 종목별의 분류와 다른 방법이다. 실험결과에 따른 체계적인 주식 데이터의 객관성 있는 분류를 제시하고자 한다. In recent years, a number of people are going more and more to develope and engage in stock and equity-related information and related industry. a lot of stock expection programs came out, but they are still unstable, especially predictions methods and reality is unfounded. In this paper, we have vast amounts of stock data, shares many of the changes affecting the width of the survey items, and should seek the weights. This is related to existing stock levels and categories and is another way. Results based on a systematic classification of the stock data that would like to introduce objectivity
중첩 기반 연산과 Hanning Window를 이용한 블록 불연속 노이즈 방지 알고리즘
김주현,장원우,박정환,양훈기,강봉순,Kim, Joo-Hyun,Jang, Won-Woo,Park, Jung-Hwan,Yang, Hoon-Gee,Kang, Bong-Soon 한국정보통신학회 2007 한국정보통신학회논문지 Vol.11 No.9
본 논문은 블록 처리 방법을 기반으로 하는 링잉 노이즈 감소 알고리즘을 사용할 때, 블록 불연속 노이즈(Block Discontinuty)를 방지 할 수 있는 중첩 기 반(Overlapped Block) 연산과 Hanning Window에 관련된 것이다. 링잉 노이즈 감소 알고리즘은, 24bit RGB와 블록 기반 연산으로 하며, 수정된 K-means 알고리즘을 바탕으로 한다. 그래서 제안한 중첩 기반 연산은 입력 영상을 여러 단위 블록으로 조각낼 때, 단위 블록의 크기의 반을 중첩 시켜 선택하는 방법이다. $16{\times}16$ 픽셀 크기의 데이터 블록을 데이터 유닛(Data Unit)이 라고 정의하였다. 그 후 처리된 데이터 유닛들을 등방성 분포를 지닌 Hanning Window를 사용하여 중첩된 데이터에서 원 이미지 형태로 복원하였다. 최종적으로 언급된 알고리즘의 성능을 확인하기 위해서 링잉 노이즈를 가진 이미지를 기존 방법(비 중첩 기반 연산)과 제안한 알고리즘으로 처리함으로써 각각의 결과를 비교하였다. In this paper, we propose an Overlapped Block and an Hanning Window to prevent a Block Discontinuity when we use an algorithm to eliminate ringing artifact which is based on a block structure. The algorithm to eliminate ringing artifact operates with a block structure and 24-RGB data and is based on a modified K-means algorithm. The proposed overlapped block method is piled up one on another per an half of the size of unit-block when an input image is split into several unit-blocks. Therefore, we define a data unit as the unit-block of the block size, $16{\times}16$ pixels. We reconstruct the processed data units into the original form of input image by using an isotropic form of Hanning Window. Finally, in order to evaluate the performance of the abovementioned algorithms, we compare three image, an input image with ringing artifact, an image result obtained by conventional method (non-overlapped), and an image result obtained the proposed method.
분무열분해공정에 의한 메조기공 알루미나 제조에 있어 Al 전구체 영향
김주현,정경열,박균영,Kim, Joo-Hyun,Jung, Kyeong-Youl,Park, Kyun-Young 한국분말야금학회 2010 한국분말재료학회지 (KPMI) Vol.17 No.3
Mesoporous alumina particles were prepared by spray pyrolysis using cetyltrimethyl-ammonium bromide (CTAB) as a structure directing agent and the effect of Al precursor types on the texture properties was studied using $N_2$ adsorption isotherms, small-angle X-ray scattering (SAXS), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). The surface area and the microstructure of alumina particles were significantly influenced by the Al precursor type. The largest BET surface area was obtained when Al chloride was used, whereas alumina particles prepared from Al acetate had the largest pore volume. According to small-angle X-ray scattering (SAXS) analysis, the alumina powders prepared using nitrate and acetate precursors had a clear single SAXS peak around $2{\theta}=1.0{\sim}1.5^{\circ}$, indicating that regular mesopores with sponge-like structure were produced. On the basis of TEM, SAXS, and $N_2$ isotherm results, the chloride precursor was most profitable to obtain the largest surface area ($265\;m^2/g$), whereas, the nitrate precursor is useful for the preparation of non-hollow mesoporous alumina with regular pore size, maintaining high surface area (${\sim}233\;m^2/g$).
김주현,최한고,Kim, Ju-Hyeon,Choi, Han-Go 한국융합신호처리학회 2014 융합신호처리학회 논문지 (JISPS) Vol.15 No.4
본 연구는 칼라기반에서 단일 이동객체 추적을 다루고 있다. 우선 매 영상에서 이동객체 영상의 밝기 변화에 따른 추적 약점을 개선하기 위해 기존의 Camshift 알고리즘을 보완하였다. 보완된 알고리즘도 추적중인 물체와 색상이 같은 주변 물체가 존재할 경우 불안정한 추적을 보여주었는데 본 연구에서는 이를 해결하기 위해 Optical Flow기반의 KLT 알고리즘과 병합하는 방법을 제시하였다. 픽셀기반의 특징점 추적을 수행하는 KLT 알고리즘은 칼라기반의 Camshift의 단점을 보완할 수 있다. 실험 결과 제안된 병합 방법은 기존의 추적단점을 보완하였으며 추적성능이 개선됨을 실험으로 확인하였다. This paper deals with a color-based tracking of a moving object. Firstly, existing Camshift algorithm is complemented to improve the tracking weakness in the brightness change of an image which occurs in every frame. The complemented Camshift still shows unstable tracking when the objects with same color of the tracking object exist in background. In order to overcome the drawback this paper proposes the Camshift combined with KLT algorithm based on optical flow. The KLT algorithm performing the pixel-based feature tracking can complement the shortcoming of Camshift. Experimental results show that the merged tracking method makes up for the drawback of the Camshit algorithm and also improves tracking performance.
한국 육군 일개 사단에서 군 복무 부적응자들의 정신의학적 평가 : 그린캠프 참가자들을 중심으로
김주현,강석훈,예병석,황현국,서재원,채공주,이환배,김찬형,Kim, Ju-Hyun,Kang, Suk-Hoon,Ye, Byoung-Seok,Hwang, Hyun-Kuk,Suh, Jae-Won,Chai, Gong-Ju,Lee, Hwan-Bae,Kim, Chan-Hyung 대한불안의학회 2010 대한불안의학회지 Vol.6 No.2
Objectives : In this study, we aimed to elucidate the demographic and psychological characteristics of maladaptive soldiers in the Republic of Korean Army. Methods : Study participants included 110 male conscripts who had participated in the Green camp, which was a form of group psychosocial treatment program for maladaptive soldiers. All participants were interviewed and diagnosed by a psychiatrist, and classified into two groups according to whether they left or rejoined the army. We analyzed the differences between these two groups in terms of demographic features, psychiatric diagnosis and the Minnesota Multiphasic Personality Inventory (MMPI) subscores. Results : Compared with soldiers who rejoined their units, those who left military service exhibited significantly lower educational level (p=0.041) and a higher rate in psychiatric treatment prior to enlistment (p=0.011). Among the 106 subjects, 63 (59.4%) and 23 (21.7%) were diagnosed with personality disorder and adjustment disorder, respectively. Further, those who left military service were diagnosed more frequently with mood disorder (p=0.001) and schizophrenia (p=0.014) than those who rejoined their units. Additionally, the MMPI scores of soldiers who left military service were significantly higher on the psychasthenia (p=0.028) and schizophrenia (p=0.039) scales than those of soldiers who rejoined their units. Conclusion : Most of the maladaptive soldiers were diagnosed with mental disorders. The results of this study suggest that systematic, consistent psychiatric evaluation and intervention for maladaptive male conscripts is crucial in the Republic of Korean army.