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A Case of Pyogenic Liver Abscess Caused by Staphylococcus epidermidis in a Healthy Child
곽지혜,임연주,최의윤,강진한,Gwak, Ji Hye,Eem, Yeun Joo,Choi, Ui Yoon,Kang, Jin Han The Korean Society of Pediatric Infectious Disease 2013 Pediatric Infection and Vaccine Vol.20 No.1
Staphylococcus epidermidis is a normal inhabitant of skin, throat, mouth, vagina, and urethra. It is not usually pathogenic, particularly in immunocompetent hosts. This report describes a case of a pyogenic liver abscess caused by Staphylococcus epidermidis in a healthy 12-year-old boy. He was admitted to Seoul St. Mary's Hospital with intermittent fever for 6 days. Findings on abdominal computed tomography (CT) showed a mass measuring $7.0{\times}6.5$ cm in the right hepatic lobe. Culture of the abscess resulted in growth of Staphylococcus epidermidis as a causative organism. The patient was successfully treated with intravenous administration of antibiotics and percutaneous drainage of the abscess.
무기 ELD용 ZnS:Mn,Cu,Cl 형광체의 광학적 특성 연구
이학수 ( Hak Soo Lee ),곽지혜 ( Ji Hye Gwak ),한상도 ( Sang Do Han ),한치환 ( Chi Hwan Han ),김정덕 ( Jung Duk Kim ) 한국전기전자재료학회 2006 한국전기전자재료학회 하계학술대회 논문집 Vol.2006 No.1
Zinc sulfide is a well-known host material of phosphor emitting different radiations dependent on different doping impurities of metallic ion. It emits green, blue, orange-yellow or white colors by doping with activators such as copper, silver, manganese and so on. In this study, manganese, copper and chlorine doped ZnS phosphor (ZnS:Mn,Cu,Cl) was synthesized by solid-state reaction method. The optical properties were investigated according to different concentrations of sulfur and activators used during the synthesis process.
정성훈(Jung, Sung-Hun),안세진(Ahn, Se-Jin),윤재호(Yun, Jae-Ho),곽지혜(Gwak, Ji-Hye),조아라(Cho, A-Ra),윤경훈(Yoon, Kyung-Hoon),김동환(Kim, Dong-Hwan) 한국신재생에너지학회 2009 한국신재생에너지학회 학술대회논문집 Vol.2009 No.11
Despite the success of Cu(In,Ga)Se₂ (CIGS) based PV technology now emerging in several industrial initiatives, concerns about the cost of In and Ga are often expressed. It is believed that the cost of those elements will eventually limit the cost reduction of this technology. One candidate to replace CIGS is Cu₂ZnSnSe₄ (CZTSe), fabricated by co-evaporation technique. Co-evaporation technique will be one of the best methods to control film composition. This type of absorber derives from the CuInSe² chalcopyrite structure by substituting half of the indium atoms with zinc and other half with tin. Energy bandgap of this material has been reported to range from 0.8eV for selenide to 1.5eV for the sulfide and large coefficient in the order of 10^{14}cm^{-1}, which means large possibility of commercial production of the most suitable absorber by using the CZTSe film. In this work, Effects of substrate temperature of Cu₂ZnSnSe₄ absorber layer on the performance of thin films solar cells were investigated. We reported on some of the absorber properties and device results.
김균환(Kim, Kyun-Hwan),안세진(Ahn, Se-Jin),윤재호(Yun, Jae-Ho),곽지혜(Gwak, Ji-Hye),조아라(Jo, A-Ra),김도진(Kim, Do-Jin),윤경훈(Yoon, Kyung-Hoon) 한국신재생에너지학회 2009 한국신재생에너지학회 학술대회논문집 Vol.2009 No.11
Chalcopyrite semiconductor CuInSe₂ nanoparticles were prepared using a low temperature colloidal route by reacting the starting materials (CuI, InI₃ and Na₂Se) in solvents. After synthesised CuInSe₂ nanoparticles precursors were mixed with organic binder for the viscosity of the precursor slurry to be suitable for the doctor blade method. The mixture of CuInSe₂ and binder was deposited onto molybdenum-coated sodalime glass substrates to form thin film. The precursor thin films were preheated on the hot plate to remove remaining solvents and binder material. After subsequent thermal processing of the thin film under a selenium ambient, CuInSe₂ absorber layer with grain size significantly lager than that of the nanoparticles was formed.
Polyimide 기판을 이용한 Flexible CIGS 박막 태양전지 제조
정승철(Jung, Seung-Chul),안세진(Ahn, Se-Jin),윤재호(Yun, Jae-Ho),곽지혜(Gwak, Ji-Hye),김도진(Kim, Do-Jin),윤경훈(Yoon, Kyung-Hoon) 한국신재생에너지학회 2009 한국신재생에너지학회 학술대회논문집 Vol.2009 No.06
In this study, we fabricated the Cu(In,Ga)Se₂ (CIGS) thin-film solar cells by using a polyimide substrate. The CIGS thin-film was deposited on Mo coated polyimide substrate by a 3-stage co-evaporation technique. Because the polyimide shows thermal transformation at about 400?C, the substrate temperature of co-evaporation process was set to below 400?C. Corresponding solar cell showed a conversion efficiency of 7.08 % with V_{OC} of 0.58 V, J_{SC} of 24.99 mA/cm² and FF of 0.49.
BIPV 응용을 위한 플렉서블 Cu(In,Ga)Se<sub>2</sub> 박막태양전지의 연구현황 및 전망
신동협,김기환,조준식,어영주,안승규,정인영,조윤애,송수민,곽지혜,윤재호,Sin, Dong-Hyeop,Kim, Gi-Hwan,Jo, Jun-Sik,Eo, Yeong-Ju,An, Seung-Gyu,Jeong, In-Yeong,Jo, Yun-Ae,Song, Su-Min,Gwak, Ji-Hye,Yun, Jae-Ho 한국태양광발전학회 2017 한국태양광발전학회지 Vol.3 No.3
$Cu(In,Ga)Se_2$ (CIGS) 태양전지 기술은 1970년대 처음으로 소개된 이래 지속적인 기술적 진보를 통해 현재 소면적 유리 기판기준으로 세계최고효율 22.6%을 달성하였다. 최근에는 유리 기판뿐만 아니라 플렉서블 기판에도 적용되어 20%가 넘는 고효율이 유지됨으로써, 플렉서블 CIGS 박막태양전지의 BIPV로 응용에 대한 관심이 증가하고 있다. 따라서 본 글에서는 플렉서블 CIGS 박막태양전지의 주요 요소 기술에 대해서 살펴보고, 국내외 연구 및 산업적 현황 및 향후 전망에 대해서 기술하고자 한다.
동시-스퍼터링 및 셀렌화에 의한 CuInSe<sub>2</sub> 박막 형성 기구 분석
문동권(Mun, Dong-Gwon),안세진(An, Se-Jin),윤재호(Yun, Jae-Ho),곽지혜(Gwak, Ji-Hye),조아라(Jo, A-Ra),이희덕(Lee, Hui-Deok),윤경훈(Yun, Gyeong-Hun) 한국신재생에너지학회 2009 한국신재생에너지학회 학술대회논문집 Vol.2009 No.11
CuInSe₂계 태양전지는 동시 증발공정으로 최고 효율 약 20%를 얻었으나, 동시 증발법은 대면적화 및 조성 균일도 조절에 어려움이 있다. 이에 반해 스퍼터링 및 셀렌화 공정은 동시 증발법에 비해 대면적의 조성 조절 및 생산속도가 뻐른 장점이 있다. 이에 따라 스퍼터링 및 셀렌화 공정을 통해 CIS 태양전지를 양산화 하려는 시도가 전세계적으로 활발히 진행중이다. 그러나 연구소 및 학교를 중심으로 연구가 진행되어 박막 증착 공정 및 단계별 박막 특성이 많은 부분 밝혀진 동시 증발공정에 비해, 몇몇 기업을 중심으로 연구가 진행되고 있는 스퍼터링/셀렌화 공정의 경우 공정 조건 및 이에 따른 박막 특성/형성기구에 대한 정보가 거의 없는 상태이다. 따라서 본 연구에서는 CuIn 및 Cu 타겟을 동시 스퍼터링하여 전구체를 만든후 이를 셀렌화하여 CIS 박막을 성장시키고, 특히 열처리 단계별 상분석을 통해 CIS 형성기구를 고찰하고자 하였다.