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이종접합 Gate 구조를 갖는 수평형 NiO/Ga<sub>2</sub>O<sub>3</sub> FET의 전기적 특성 연구
이건희 ( Geon-hee Lee ),문수영 ( Soo-young Moon ),이형진 ( Hyung-jin Lee ),신명철 ( Myeong-cheol Shin ),김예진 ( Ye-jin Kim ),전가연 ( Ga-yeon Jeon ),오종민 ( Jong-min Oh ),신원호 ( Weon-ho Shin ),김민경 ( Min-kyung Kim ),박철환 ( 한국전기전자재료학회 2023 전기전자재료학회논문지 Vol.36 No.4
Gallium Oxide (Ga<sub>2</sub>O<sub>3</sub>) is preferred as a material for next generation power semiconductors. The Ga<sub>2</sub>O<sub>3</sub> should solve the disadvantages of low thermal resistance characteristics and difficulty in forming an inversion layer through p-type ion implantation. However, Ga<sub>2</sub>O<sub>3</sub> is difficult to inject p-type ions, so it is being studied in a heterojunction structure using p-type oxides, such as NiO, SnO, and Cu<sub>2</sub>O. Research the lateral-type FET structure of NiO/Ga<sub>2</sub>O<sub>3</sub> heterojunction under the Gate contact using the Sentaurus TCAD simulation. At this time, the VG-ID and VD-ID curves were identified by the thickness of the Epi-region (channel) and the doping concentration of NiO of 1 × 10<sup>17</sup> to 1 × 10<sup>19</sup> cm<sup>-3</sup>. The increase in Epi region thickness has a lower threshold voltage from -4.4 V to -9.3 V at I<sub>D</sub> = 1 × 10<sup>-8</sup> mA/mm, as current does not flow only when the depletion of the PN junction extends to the Epi/Sub interface. As an increase of NiO doping concentration, increases the depletion area in Ga<sub>2</sub>O<sub>3</sub> region and a high electric field distribution on PN junction, and thus the breakdown voltage increases from 512 V to 636 V at I<sub>D</sub> =1 × 10<sup>-3</sup> A/mm.
Ga Eun Lee,Ryun Hee Kim,Taehwan Lim,Jaecheol Kim,Suna Kim,Keum Taek Hwang 한국식품영양과학회 2021 한국식품영양과학회 학술대회발표집 Vol.2021 No.10
This study aimed to identify ellagitannins in black raspberry (Rubus occidentalis) seeds (BS) and to optimize accelerated solvent extraction of ellagitannins using artificial neural network (ANN) coupled with genetic algorithm (GA). Ellagitannins were fractionated using Amberlite XAD-16N and Sephadex LH-20 resins. The ellagitannin fraction was qualitatively analyzed by HPLC-Q-TOF-MS/MS. BS had mainly monomeric and dimeric ellagitannins such as pedunculagin, castalagin, acutissimin A, sanguiin H-10, casuarictin, sanguiin H-2, sanguiin H-6, and sanguiin H-6 without a gallic moiety. For ANN modeling, extraction time (3-9 min), extraction temperature (40-70°C), and solvent concentration (50-100% acetone) were set as independent input variables, and total ellagitannin content was set as output variable. The ANN of this study had an input layer with three neurons, a hidden layer with ten neurons, and an output layer with one neuron. The optimal extraction conditions of the total ellagitannin content were predicted by the trained ANN coupled with GA. This study is the first attempt to analyze ellagitannin content in BS.
최가희,조성호 가톨릭대학교 사회과학연구소 2002 社會科學硏究 Vol.18 No.-
상담과정 및 성과에서 상담자 측면은 간과할 수 없는 중요한 부분임에서 불구하고 상담자 측면에 대한 연구는 부족한 실정이다. 따라서 본 연구는 상담과정 및 성과에서 상담자 측면에 관심을 가지고, 내담자에 대한 상담자의 지각, 즉 인상형성을 측정하는 척도를 개발하고자 하였다. 이를 위해 최가희(2002)가 사용한 주관적 인상형성 질문지와 치료적 인상형성 질문지를 토대로 59문항의 상담자 인상형성 척도를 제작하였고, 146명의 상담자를 대상으로 자료를 수집하였다. 상담자 인상형성 질문지에 대해 요인분석을 실시한 결과 7개의 요인이 추출되었는데, 7개의 요인은 각각 '긍정적 상담성과' '상담자의 촉진적 태도' '내담자 매력' '치료적 개입의 용이성' '내담자 정서적 안정성' '내담자 저항수준' '내담자 진실성'으로 명명되었다. 또한 내담자에 대한 인상형성 척도는 .94의 내적합치도를 보여 비교적 신뢰로운 것으로 나타났다. 본 연구의 결과는 내담자에 대한 상담자의 주관적인 인상형성과 치료적 인상형성이 구별된 요인으로 묶이는 것을 보여 주었고, 이론적으로만 구분되었던 주관적 인상형성과 치료적 인상형성을 경험적으로 지지해 주는 것이라 할 수 있다. 끝으로, 본 연구의 의의와 제한점, 그리고 추후 연구를 위한 제안들을 제시하였다. Although therapist plays an important role in counseling, research related to therapist has been insufficient. The purpose of this study is to develop Therapists' Impression-Formation Scale. For this. Therapist's Impression-Formation Scale was administered to 146 therapists. The scale is based on Personal Impression-Formation and Therapeutic Impression-Formation scales developed by Choi(2002). Seven factors were extracted from factor analysis of the scale, and they were named as positive therapy outcome, therapist's encouraging attitudes, client's attractiveness, easiness of therapeutic intervention, client's subjective well-being, client's resistance level, client's sincerity. Each factors reflect personal impression-formation and therapeutic impression-formation. The results of the study provide empirical evidence of the personal impression-formation and therapeutic impression-formation, and this scale can be useful on the research related to therapist. Finally, Limitations of this study and suggestion for the future study were discussed.
박주가리(Metaplexis japonica Makino)의 캘러스유도와 조직별 gagaminine의 함량분석
이대원,신가희 東國大學校 1999 東國論叢 Vol.38 No.-
In order to produce antioxidantic gagaminine from the plant and cell culture of Metaplexis japonica Makino, induction rate of callus with plant growth regulators was investigated and gagaminine from the various tissues and calli was analyzed using HPLC assay. when the callus from leaf tissue was used on MS medium, induction rate was highest (63.0%). the optimal concentrations of 2,4-D for callus induction of leaf, stern and petiole were 2.0, 0.5 and 0.1 mg/L, respectively. The content of gaganinine in the plant was abundant in the tissue of stem, leaf, and root in order. However, the highest gagaminine content was found in the callus from petiole (0.276 mg/mL) and its content was 12 times higher than that in the stem tissue (0.023 mg/mL) of the intact plant. This result suggests that gagaminine might be produced using the cell culture in vitro in Metaplexis japonica Makino.
정철영,고재관,황원채,윤희철,박가열,김재호,이성식,김동승,표성일,이건남,양안나,최수정,김은석 한국직업능력개발원 2008 직업능력개발연구 Vol.11 No.1
이 연구의 목적은 제대군인에 대한 효율적인 전직지원을 위해서 현행 전직지원 프로세스에 대한 개선 안과 이에 따른 국방부, 국가보훈처 등 제대군인 전직지원관련 기관 간의 역할분담 및 연계방안에 대해서 제안하는 것이다. 연구는 크게 세 가지 과정을 거쳤다. 첫째, 국내 군 전직지원 실태를 분석하여 문제점과 시사점을 도출하였다. 둘째, 이러한 문제점과 시사점, 군 전직지원 선행연구를 종합하여 효율적인 군 전직지원 프로세스 안을 제시하였다. 셋째, 구축한 군 전직지원 프로세스 안에 따라 주요 군 전직지원 관련 기관인 국방부, 국가보훈처의 역할 분담 안을 제안하였다. This study aims to suggest an improvement plan for the support process of effective occupation change for discharged soldiers and then role assignments among related institutions for supporting discharged soldiers such as Ministry of Defense, Ministry of Patriots and Veterans Affairs, Ministry of Labor and the cooperation plan among the institutions. The study was made in three steps. First, after analyzing currents support facts and status for discharged soldiers, it induced its problems and implications. Second, integrating the findings of previous studies related to support plan on occupation changes for the discharged soldiers, Problems and implications mentioned above, it constructed effective occupation change process for discharged soldiers. Then, according to the established process, it suggested role assignments such as Ministry of Defense, Ministry of Patriots and Veterans Affairs, Ministry of Labor.
( Hee Jung Kim ),( Ga Won Yim ),( Eun Ji Nam ),( Seon Mi Baek ),( Hee Jin Nam ),( Dawn Chung ),( Sunghoon Kim,),( Sang Wun Kim ),( Jae Wook Kim ),( Young Tae Kim ) 대한산부인과학회 2012 대한산부인과학회 학술대회 Vol.99 No.-
Long non-coding RNAs (lncRNAs) are newly identified regulators in tumorigenesis and tumor progression. Although the functions of lncRNAs and the mechanisms regulating their expression are largely unknown, recent studies are beginning to solve thier importance in human health and diseases. Steroid receptor RNA activator (SRA) RNA levels might affect some biological functions, such as proliferation, apoptosis, steroidogenesis, and myogenesis, has been reported. This study investigated the molecular aggressive function of SRA in ovarian cancer. To investigate the role of SRA in the development of ovarian cancer, we examined SRA expression in ovarian cancer tissues (n=14) and corresponding normal tissues (n=16) by real-time polymerase chain reaction. Knockdown of SRA (siSRA) by RNA interference was performed to explore its roles in cell proliferation, migration and invasion assay. SRA expression was significantly upregulated in ovarian cancer tissues compared to normal ovarian tissues. Real-time PCR results showed high expression levels of SRA in SKOV3, TOV112D and OVCA429 human ovarian cancer cell lines. Knockdown of SRA reduced cell proliferation, migration, and invasion in OVCA429 cells. Moreover, SRA knockdown decreased the expression of vascular endothelial growth factor and matrix metalloproteinase-9, which are important for cell motility and metastasis. Therefore, SRA may promote tumor aggressiveness through the upregulation of VEGF and MMP-9. These results identified an important role of SRA in the molecular etiology of ovarian cancer and implicated the potential application of SRA in ovarian cancer therapy.