적층형 태양전지를 위한 비정질실리콘계 산화막 박막태양전지의 광흡수층 및 반사체 성능 향상 기술

강동원,Kang, Dong-Won 한국전기전자재료학회 2017 전기전자재료학회논문지 Vol.30 No.2

Highly photosensitive and wide bandgap amorphous silicon oxide (a-$SiO_x$:H) films were developed at low temperature ranges ($100{\sim}150^{\circ}C$) with employing plasma-enhanced chemical vapor deposition by optimizing $H_2/SiH_4$ gas ratio and $CO_2$ flow. Photosensitivity more than $10^5$ and wide bandgap (1.81~1.85 eV) properties were used for making the a-$SiO_x$:H thin film solar cells, which exhibited a high open circuit voltage of 0.987 V at the substrate temperature of $100^{\circ}C$. In addition, a power conversion efficiency of 6.87% for the cell could be improved up to 7.77% by employing a new n-type nc-$SiO_x$:H/ZnO:Al/Ag triple back-reflector that offers better short circuit currents in the thin film photovoltaic devices.

IP 서비스 과금 시스템 최신 동향

강동원,최태상,이준경,이경호,Kang, D.W.,Choi, T.S.,Lee, J.K.,Lee, K.H. 한국전자통신연구원 2006 전자통신동향분석 Vol.21 No.6

통신 시장의 경쟁 심화, 급속한 기술 발전은 All-IP 기반의 공통 인프라와 다양한 고품질 융합 서비스의 환경으로 패러다임을 변화시키고 있으며, 이러한 변화에 따라 IP 서비스에 대한 과금 체계 또한 진화하고 있다. 본 고에서는 그 중요성이 증대하고 있는IP 서비스의 과금 시스템에 대하여 개념과 기술 동향, 관련 표준화 활동을 살펴보고, 차세대 네트워크(BcN)를 대비한 과금 정책에 대하여 기술한다. 그리고 이와 같은 기술동향 및 과금 정책을 효과적으로 구현하기 위해 ETRI에서 개발중인 고속회선용 정밀과금 시스템을 소개한다.

모유 수유 중인 산욕기 환자의 두드러기 치험 1례

강동원,강세현,박중군,황덕상,김윤범,김규석,Kang, Dong-Won,Kang, Se-Hyun,Park, Jung-Gun,Hwang, Deok-Sang,Kim, Yoon-Bum,Kim, Kyu-Seok 대한한방안이비인후피부과학회 2018 한방안이비인후피부과학회지 Vol.31 No.3

Objectives : The aim of this study is to report the effect of herbal medicine and acupuncture on a breastfeeding woman's postpartum urticaria which was unresponsive to a 1st generation antihistamine and a topical steroid. Methods : Wheals and pruritus occurred to a 36-year-old breastfeeding woman 2 days after the parturition. Symptoms were unresponsive to about a week of systemic antihistamine and topical steroid treatments. GamiSamul-tang herbal decoction was administered three times a day for the first 21 days and twice a day for the next 10 days of the treatment. Acupuncture treatment was applied to 12 acupoints (both sides of LI04, LR03, ST36, LI11, SP10, SP6) for 15 minutes once a week, 5 times in total. The patient's symptom was evaluated with Weekly Urticaria Activity Scale (UAS7) and Visual Analogue Scale for Worst Pruritus within 24 hours ($VAS_{Pruritus}$) each time the patient visited out-patient department. Results : The scores of UAS7 and $VAS_{Pruritus}$ at the baseline were 38 and 8.2 respectively. 10 days after the herbal medicine and acupuncture treatment began, both decreased to 0 and wheal, pruritus, erythema didn't appeared again for the rest of the follow up periods. Conclusions : This study shows the possibility of using GamiSamul-tang and acupuncture to treat postpartum urticaria.

신생아 괴사성 장염의 예후 인자에 관한 연구

강동원,곽금희,양근호,배병노,김기환,한세환,김홍주,김영덕,최명재,Kang, Dong-Won,Gwak, Geum-Hee,Yang, Keun-Ho,Bae, Byung-Noe,Kim, Ki-Hwan,Han, Se-Whan,Kim, Hong-Joo,Kim, Young-Duk,Choi, Myeung-Jae 대한소아외과학회 2008 소아외과 Vol.14 No.2

Necrotizing enterocolitis (NEC) is the most common gastrointestinal emergency in the neonatal population. The aim of this study is to evaluate surgical indication and prognostic factors of NEC. Clinical data of seventy patients, diagnosed as NEC between January 2000 & January 2007, were reviewed retrospectively. Fifty-seven patients had medical treatment and 7 of them died. Thirteen patients who presented with pneumoperitoneum on plain abdominal film or were refractory to medical treatment received surgical treatment, and 5 of them died. All the expired 12 patients weighed less than 2500 g. Twenty out of seventy patients showed thrombocytopenia, and 11 patients of them died. The finding of pneumoperitoneum and thrombocytopenia could be the most important surgical indication. Prematurity, low birth weight and thrombocytopenia were related to a bad prognosis. NEC patients who presents with these findings must be considered for close observation and intensive care.

지식 기반의 프로세스 테일러링 자동화 기법

강동원(Dongwon Kang),송인권(In-Gwon Song),배두환(Doo-hwan Bae) 한국정보과학회 2011 정보과학회논문지 : 소프트웨어 및 응용 Vol.38 No.6

소프트웨어 프로세스는 소프트웨어의 품질 및 생산성을 결정하는 가장 중요한 요소라는 점에서 프로세스 테일러링은 프로젝트의 성공 여부를 결정하는 매우 중요한 활동이라 할 수 있다. 이러한 중요성에도 불구하고 프로세스 테일러링은 일반적으로 전문가의 지식 및 경험에 의존하는 경향을 보이고 있어, 프로세스의 품질이 전문가의 개인 능력에 좌우되는 문제를 가지고 있다. 이를 보완하기 위해 본 연구에서는 사례 기반 추론을 바탕으로 하여 기존에 효과적으로 수행된 프로세스와 그에 따른 테일러링 내역을 지식화하여 활용함으로써 고품질의 프로세스를 수립할 수 있도록 지원하기 위한 기법을 제공하였다. 또한 기법의 활용성을 제고하기 위하여 지식 기반의 프로세스 테일러링 및 관리를 자동화하기 위한 도구인 KSTART를 개발하였다. 본 연구의 활용을 통해 테일러링에 소요되는 어려움을 경감하고 테일러링 활동의 효율성과 효과성을 높이는 데 기여할 수 있으며, 나아가 효율적으로 수립된 프로세스의 적용을 통해 프로젝트의 생산성 및 품질 향상에 도움을 줄 수 있을 것으로 기대된다. Software processes have been recognized as a main factor for determining the productivity and quality of software. However, tailoring software process mainly relies on experts’ personal knowledge and experiences, so that the quality of the software process depends on the experts' personal capability. To resolve these problems, we propose a systematic approach to managing the experiences and knowledge on process tailoring for establishing high-quality processes. We developed a tool ‘KSTART’ to utilize the applicability of the approach. We believe that this approach reduces the effort for tailoring and makes the tailoring activity effective and efficient. Moreover, an efficient software process obtained through the efficient tailoring improves productivity and quality of a project.

고성능 박막태양전지를 위한 유리 기판 및 산화 아연 투명 전극의 2중 구조 표면 조직화 공정 연구

강동원(Dong-Won Kang) 대한전기학회 2017 전기학회논문지 Vol.66 No.8

We studied surface texture-etching of glass substrate by using reactive ion etching process with various working pressure (0.7~9.0 mT). With the increase in the pressure, a haze parameter, which means diffusive transmittance/total transmittance, was increased in overall wavelength regions, as measured by spectrophotometer. Also, atomic force microscopy (AFM) study also showed that the surface topography transformed from V-shaped, keen surface to U-shaped, flattened surface, which is beneficial for nanocrystalline silicon semiconductor growth with suppressing defective crack formation. The texture-etched ZnO:Al combined with textured glass exhibited pronounced haze properties that showed 60~90 % in overall spectral wavelength regions. This promising optical properties of double textured, transparent conducting substrate can be widely applied in silicon thin film photovoltaics and other optoelectronic devices.

인라인 스퍼터를 이용한 알루미늄 도핑된 산화아연 박막의 증착 및 특성 최적화 연구

강동원(Dong-Won Kang) 대한전기학회 2017 전기학회논문지 Vol.66 No.8

We deposited Al-doped ZnO (ZnO:Al) thin films on glass substrates (200 mm × 200 mm) by using in-line magnetron sputtering system. Effects of various deposition parameters such as working pressure, deposition power and substrate temperature on optoelectronic characteristics including surface-texture etching profiles were carefully investigated in this study. We found that relatively low working pressure and high deposition power offered to obtain enhanced conductivity and optical transmittance. Haze properties showed similar trend with the transmittance. Furthermore, surface-texture etching study exhibited good morphologies when the films were deposited at 200-300 oC. On the basis of these optimizations, we could find the deposition region that produces highly transparent and conductive properties including efficient light scattering capability.

커튼월 옥외폭로 시험 개요 및 시험방법 연구

강동원(Kang, Dong Won),홍순구(Hong, Soon Gu),이동은(Lee, Dong Eun),김영근(Kim, Young Geun),김성래(Kim, Sung Rae) 한국콘크리트학회 2017 한국콘크리트학회 학술대회 논문집 Vol.29 No.1

헤드 형상에 따른 2행정기관 실린더내의 유동장에 대한 수치해석적 연구

강동원(D. W. Kang),양희천(H. C. Yang),채수(S. Chae),유홍선(H. S. Ryou) 한국자동차공학회 1994 한국 자동차공학회논문집 Vol.2 No.5

라오스볼라벤고원의어류상과Poropuntius bolovenensis의 섭식기구다형성

강동원 ( Dong-won Kang ),이학영 ( Hak Young Lee ),최승호 ( Seung-ho Choi ) 한국환경생태학회 2016 한국환경생태학회지 Vol.30 No.3

2014년 3월부터 4월까지 라오스 볼라벤 고원의 Xe Pian과 Xe Namnoy의 본류 및 지류 하천에서 어류상을 조사한 Macronathus sp. 등 10종은 볼라벤 고원의 고유종으로 본 지역은 35.7%의 높은 고유화 빈도를 나타냈다. 한편 볼라벤 고원 내에 4종의 Poropuntius속 어류가 서식한다고 알려져 있으나(Kottelat, 2000, 2013) 본 조사에서 입 모양을 제외한 주요 계수형질이 4종 모두 중복되는 것을 확인하였다. 또한 미성어(>70㎜)는 일반적인 입 모양(narrow)을 가졌으나, 성어의 입 모양은 2가지 유형(narrow/broad)으로 나타나 성장하면서 입 모양이 변화하는 것으로 생각된다. 본 연구를 통해 볼라벤 고원에 서식하는 Poropuntius속 어류는 Poropuntius bolovenensis 1종이며, 본 종은 다양한 입 모양을 가지는 섭식기구의 다형성(Trophic polymorphism)이 존재하는 것을 확인하였다.결과 총 8과 28종의 어류가 확인되었다. 채집된 어류 중 Devario salmonatus, Poropuntius bolovenensis, Annamiasp., Sewellia elongata, Schistura bolavenensis, Schistura sp.1, Schistura sp.2, Schistura sp.3, Schistura sp.4, This survey was conducted during March to April 2014 in the main stream and tributaries of Xe Pian and Xe Namnoy in order to investigate fish fauna in the Bolaven Plateau. Fish belonging to twenty eight species and eight families were collected from the main stream and tributaries of Xe Namnoy and Xe Pian during the survey period. Among them, Devario salmonatus, Poropuntius bolovenensis, Annamia sp., Sewellia elongata, Schistura bolavenensis, Schistura sp.1, Schistura sp.2, Schistura sp.3, Schistura sp.4, and Macronathus sp. were endemic species in the Bolaven Plateau, indicating a high prevalence rate of endemic species (35.7%) in the area. Meanwhile, Kottelat (2000, 2013) has been reported that four species of Poropuntius inhabit the Bolaven Plateau. However, the major morphic characteristics of Poropuntius species found in the Bolaven Plateau were mostly overlapped, except for the shape of their mouth. The young fish of Poropuntius (> 70 mm SL) have only generalized mouth while the of adult fish the shape of their mouth have two phenotype (narrow and broad). Therefore, it is assumed that Poropuntius species in the Bolaven Plateau has trophic polymorphism as the same species exhibits two different mouth shapes.