황반부종이 합병된 망막분지정맥폐쇄에서 자연경과와 유리체강내 트리암시놀론 주입술의 결과 비교

권순일,김영욱,박인원,Soon Il Kwon,Young Wook Kim,In Won Park 대한안과학회 2011 대한안과학회지 Vol.52 No.8

Purpose: To evaluate the natural course of eyes with decreased visual acuity associated with macular edema secondary to branch retinal vein occlusion (BRVO) and to compare the visual outcome and macular thickness with those of eyes treated with intravitreal triamcinolone acetonide injection (IVTA). Methods: We reviewed the medical records of patients with macular edema secondary to BRVO who were followed-up for 12 months. We evaluated the best corrected visual acuity (BCVA) and macular thickness of the patients who had no treatment for macular edema (natural course group) and compared them with those of patients who had been treated with IVTA (treatment group). Results: A total of 29 eyes (29 patients) in the natural course group and 27 eyes (27 patients) in the treatment group were enrolled. The BCVA of the natural course group improved in a slow but steady manner and showed a statistically significant difference at 12 months. The treatment group did not show any improvement in BCVA throughout the follow-up period. Therefore, BCVA significantly improved in the natural course group after six months compared to that in the treatment group. Macular thickness showed a statistically significant reduction in three months in the natural course group and in one month in the treatment group. Conclusions: Although IVTA was effective in reducing macular edema in branch retinal vein occlusion at one month after administration, the natural course group had a superior outcome and more improved macular thickness after six months. J Korean Ophthalmol Soc 2011;52(8):952-958

기판 바이어스 전압을 이용한 태양전지용 GZO 박막의 전기적, 광학적 특성

권순일,이석진,박승범,정태환,임동건,박재환,최원석,박문기,양계준,Kwon, Soon-Il,Lee, Seok-Jin,Park, Seung-Bum,Jung, Tae-Hwan,Lim, Dong-Gun,Park, Jea-Hwan,Choi, Won-Seok,Park, Moon-Gi,Yang, Kea-Joon 한국전기전자재료학회 2009 전기전자재료학회논문지 Vol.22 No.5

In this paper we report upon an investigation into the effect of DC bias voltage on the electrical and optical properties of Gallium doped zinc oxide (GZO) film. GZO films were deposited on glass substrate without substrate temperature by RF magnetron sputtering from a ZnO target mixed with 5 wt% $Ga_{2}O_{3}$. we investigated sample properties of bias voltage change in 0 to -60 V. We were able to achieve as low as $5.89{\times}10^{-4}{\Omega}cm$ and transmittance over 88 %. without substrate heating.

Si 기판에 제작된 AAO 박막의 기공 형성 최적화에 관한 연구

권순일,양계준,송우창,이재형,임동건,Kwon, Soon-Il,Yang, Kea-Joon,Song, Woo-Chang,Lee, Jae-Hyeong,Lim, Dong-Gun 한국전기전자재료학회 2008 전기전자재료학회논문지 Vol.21 No.5

AAO films were fabricated on two kinds of substrates such as $Al/SiO_2/Si$ and Al/Ni/Ti/Si. To obtain well-aligned AAO film, we optimized process condition for buffer layer, electrolyte and voltage. In the case of oxalic acid, the AAO film with pore size of approximately 45 nm was obtained at voltage of 40 V, temperature of $10^{\circ}C$, oxalic acid of 0.3 M and widening time of 60 min. Then the thickness of barrier is less than 600 nm. In the case of sulfuric acid, the AAO film has pore size of 40 nm and barrier thickness of 400 nm with optimum conditions such as voltage of 25 V, temperature of $8^{\circ}C$, sulfuric acid of 0.3 M and widening time of 60 min.

기내배양 사과 대목의 기외 삽목 시 발근과 순화에 미치는 배양조건 및 생장조절물질의 효과

권순일,김정희,강인규,김목종,Kwon, Soon-Il,Kim, Jeong-Hee,Kang, In-Kyu,Kim, Mok-Jong 한국식물생명공학회 2004 식물생명공학회지 Vol.31 No.2

본 연구는 사과 왜성대목 M.9와 M.26 조직 배양묘를 통기성 마개와 비통기성 마개의 MS배지에서 생장 특성을 비교하기 위해 시험되었다. 또한 배양묘의 생육 변화와 이 배양묘를 발근촉진제 침지 처리 후 기외 삽목을 하여 발근 및 순화를 동시에 시키기 위해 실시하였다. 배양병내의 $CO_2$와 에틸렌의 농도는 통기성 마개 배양병이 비통기성마개 배양병 보다 낮았다. 통기성 마개 배양병내의 온$.$습도 변화는 광조건에 따라 일정하게 반복되었다. 통기성 마개 배양묘의 기공은 외기에서 즉시 관찰 시 닫혀 있었으나 비통기성마개 배양묘의 기공은 외기에서 20분 후 관찰 시에도 열려 있었다. 통기성 마개 배양묘의 엽록체 지수와 잎 면적은 모두 비통기성 마개의 것 보다 높았다. 기외 삽목시 발근율은 M.9와 M.26 모두 300 mg/L IBA+ 3% sucrose 침지 처리 구에서 각각 86.5%와 85.4%로 가장 높았으며 순화율은 각각 71.7%와 70.0%로 가장 높았다. 통기성 마개 배양묘의 순화율은 비통기성마개 배양묘 보다 모든 침지 처리구에서 순화율이 비슷하거나 높았다. Growth of M.9 (Malus domestica Bark. cv) and M.26 (Malus domestica Bark. cv) of dwarf apple rootstock, cultured on MS agar medium in a vessel with ventilating stopper (VS) and then in vivo rooting and acclimatization under combined-treatment by some materials with IBA, were investigated. Concentration of $CO_2$ and ethylene in the vessel with VS was lower then in the vessel with non-VS. Change of temperature and humidity in the vessel with VS was repeated by light condition. Stomatal pares of tissue in the vessel with VS were immediately closed after plantlets were exposed to room humidity but those in the vessel with non-VS were opened after 20 minutes exposure to room humidity. Leaf area and chloroplast index of tissue in the vessel with VS was higher then in the vessel with non-VS. In vivo rooting ratio and acclimatization ratio of M.9 and M.26 was highest in 300mg/L IBA+3% sucrose dip-treatment among other combined- treatments.

초기 녹내장 환자의 유두주위 망막신경섬유층 두께 분석

권순일,박인원,정윤석,Soon Il Kwon,In Won Park,Yun Suk Chung 대한안과학회 2008 대한안과학회지 Vol.49 No.7

GIS 도로 데이터의 일반화를 이용한 Axial map 구현 방법에 관한 연구

권순일,박수홍,주용진,Kwon, Soon-Il,Park, Soo-Hong,Joo, Yong-Jin 한국공간정보학회 2010 한국공간정보학회지 Vol.18 No.4

방향전환의 횟수를 변인으로 공간구조를 정량적으로 산출하고 분석 할 수 있는 Space Syntax 방법론은 안전한 길, 활기 있는 길 등 연간의 '심리적 거리' 특성을 반영 할 수 있어 기존의 GIS 기반 공간정보 서비스에서의 '물리적 최단 거리'에 기반 한 공간정보 서비스에 교통사고 및 야간의 범죄로부터의 안전성 등을 훨씬 중시하는 결과를 보여줄 수 있다. 이처럼 Space Syntax 방법론을 이용한 방법을 위해 기본적으로 Axial map(축선도)을 구축해 작업하여야 하는데, 실제 축선도를 구현하는데 시간적, 물리적 제한을 많이 갖게 된다. 따라서 본 연구에서는 GIS 도로 데이터를 이용하여 축선도를 구현하는데 있어, 선행 사상의 일반화 원리를 이용하여 전통적인 축선도를 구축함에 있어 객관적인 근거를 바탕으로 알아보고, Space Syntax의 주요인자인 전체통합도와 실제 통행량 사이의 상관관계를 통해 결과를 비교하여 본다. 이러한 방법을 통하여 실제 통행량과 $R^2$=0.5387 수준까지의 상관관계의 결과를 얻을 수 있었다. Space Syntax methodology can be quantitatively calculated spatial cognitive analysis by number of turns_ In the existing GIS-based spatial information service provide 'physical distance' due to the shortest distance as a priority. but pedestrians tends to choose the path with concerned a lot of emphasis of safety, more vitality way from the crime at night, traffic accidents, and comfort on a road. Human's 'psychological distance' may reflect the spatial information services and provided path should be. In this study, using GIS Road Data implements the axial map with idea of the linear simplification principles. Traditional axial map of the Space Syntax get the assumption from the actual traffic values by comparing the results of correlation relationship. Through these methods, the actual relationship between traffic and test values have the correlation value($R^2$= 0.5387) 50% level and was able to get the results.

UCC 음원분류를 위한 연주악기 분류에 대한 연구

권순일,박완주,Kwon, Soon-Il,Park, Wan-Joo 한국정보처리학회 2010 정보처리학회논문지B Vol.17 No.2

사용자가 직접 연주하여 제작한 콘텐츠에서 많이 사용되는 악기는 기타, 피아노, 그리고 바이올린 이다. 이중 기타와 피아노가 만들어 내는 오디오 신호의 특성이 비슷하여 구분하기가 어렵다. 하지만 시간에 따른 신호의 에너지 변화가 피크(Peak)들을 중심으로 서로 다른 패턴을 보이는 것으로 분석되었다. 누적 히스토그램을 이용하여 피크 존재 가능성의 확률적 분포를 구한 후, 피크를 중심으로 그 주변의 주파수 대역 별에너지 변화 패턴을 통계적 방법으로 모델링하여 실험한 결과 피아노와 기타의 구분 성공률이 최고 14% 정도의 향상을 보였다. A guitar, a piano, and a violin are popular musical instruments for User Created Contents(UCC). However the patterns of audio signal generated by a guitar and a piano are too similar to differentiate. The difference between two musical instruments can be found by analyzing the frequency variation per each band near signal peaks. The distribution of probability on the existence of signal peaks based on Cumulative Histogram were applied to musical instrument recognition. Experiments with statistical models of the frequency variation per each band near signal peaks showed the 14% improvement of musical instrument recognition.

인적행위개선 포스터 개발과 활용

권순일,손금수,정연섭,고효제,Kwon, Soon-Il,Son, Keum-Su,Jung, Yeon-Sub,Ko, Hyo-Je 대한인간공학회 2007 大韓人間工學會誌 Vol.26 No.1

As many as 111 reactor trips have occurred for recent 5 years('01-'05), and 26 cases of them have occurred due to human error. The trend of human error rate didn't decrease in 2004, so KHNP started to make efforts to decrease human errors. In 2006 KHNP bench marked excellent foreign nuclear power plants and introduced human error prevention tools. In addition, KHNP created as many as 40 posters for human performance improvement. The posters are based on the about 500 real incident reports collected through K-HPES from 1995. Therror preventive tols for the poster. This paper explains design of the posters and their application.

SF₆, C₄F₈, O₂ 가스 변화에 따른 실리콘 식각율과 식각 형태 개선

권순일,양계준,송우창,임동건,Kwon, Soon-Il,Yang, Kea-Joon,Song, Woo-Chang,Lim, Dong-Gun 한국전기전자재료학회 2008 전기전자재료학회논문지 Vol.21 No.4

Deep trench etching of silicon was investigated as a function of RF source power, DC bias voltage, $C_4F_8$ gas flow rate, and $O_2$ gas addition. On increasing the RF source power from 300 W to 700 W, the etch rate was increased from $3.52{\mu}m/min$ to $7.07{\mu}m/min$. The addition of $O_2$ gas improved the etch rate and the selectivity. The highest etch rate is achieved at the $O_2$ gas addition of 12 %, The selectivity to PR was 65.75 with $O_2$ gas addition of 24 %. At DC bias voltage of -40 V and $C_4F_8$ gas flow rate of 30 seem, We were able to achieve etch rate as high as $5.25{\mu}m/min$ with good etch profile.

한국에서의 소아 류마티스관절염에서 발생한 포도막염의 임상양상

권순일,백성욱,박인원,김광남,박찬기,Soon Il Kwon,Sung Uk Baek,In Won Park,Kwang Nam Kim,Chan Kee Park 대한안과학회 2013 대한안과학회지 Vol.54 No.12

Purpose: To investigate the incidence and clinical characteristics of juvenile idiopathic arthritis (JIA)-associated uveitis in Korea and to identify the risk factors for developing uveitis and poor visual outcome.<br /> Methods: We performed a retrospective chart review of 149 patients who were diagnosed as JIA between January 2001 and December 2012. Patients were classified based on the International League of Associations for Rheumatology (ILAR) criteria and the incidence and clinical course of uveitis according to each subtype was investigated. We also evaluated the risk factors for poor prognostic outcomes.<br /> Results: The present study included 79 males and 70 females and the mean age was 7.42 ± 3.82 years. In 13 patients (8.6%), uveitis manifested evenly among JIA subtypes, including 5 patients with oligoarthritis type, 4 patients with polyarthritis rheumatoid negative type, and 4 patients with systemic type. Anti-nuclear antibody (ANA) was detected more in the uveitic group (46.13%). The characteristics of uveitis were acute (85%), bilateral (85%), and anterior uveitis (92%). Chronic uveitis occurred in only 2 patients who had uveitis at an early age (mean age of 5 years) and had severe anterior chamber reaction at presentation. Poor visual outcome was associated with band keratopathy and posterior synechiae preceded by the chronic uveitis.<br /> Conclusions: JIA-associated uveitis occurred evenly in each subtype. Uveitis was increased in the presence of ANA. Most uveitis showed good visual outcomes but in cases of early uveitis onset and with severe anterior chamber reaction at presentation the risk of chronic uveitis increased resulting in poor visual outcomes. <br /> J Korean Ophthalmol Soc 2013;54(12):1838-1843