3차원 소자 집적을 위한 Cu-Cu 접합의 계면접착에너지에 미치는 후속 열처리의 영향

장은정,현승민,이학주,박영배,Jang, Eun-Jung,Pfeiffer, Sarah,Kim, Bi-Oh,Mtthias, Thorsten,Hyun, Seung-Min,Lee, Hak-Joo,Park, Young-Bae 한국재료학회 2008 한국재료학회지 Vol.18 No.4

$1.5\;{\mu}m$-thick copper films deposited on silicon wafers were successfully bonded at $415^{\circ}C$/25 kN for 40 minutes in a thermo-compression bonding method that did not involve a pre-cleaning or pre-annealing process. The original copper bonding interface disappeared and showed a homogeneous microstructure with few voids at the original bonding interface. Quantitative interfacial adhesion energies were greater than $10.4\;J/m^2$ as measured via a four-point bending test. Post-bonding annealing at a temperature that was less than $300^{\circ}C$ had only a slight effect on the bonding energy, whereas an oxygen environment significantly deteriorated the bonding energy over $400^{\circ}C$. This was most likely due to the fast growth of brittle interfacial oxides. Therefore, the annealing environment and temperature conditions greatly affect the interfacial bonding energy and reliability in Cu-Cu bonded wafer stacks.

연안 환경에서 클러터에 강인한 능동소나 탐지 알고리듬

장은정,권성철,오원천,이정우,신기철,김주호,Jang, Eun Jeong,Kwon, Sungchur,Oh, Won Tcheon,Lee, Jung Woo,Shin, Keecheol,Kim, Juho 한국음향학회 2019 韓國音響學會誌 Vol.38 No.6

연안 환경에서 소형 표적의 탐지에는 고주파 능동소나가 적합하다. 연안 환경에서 고주파 능동소나를 사용할 경우 해양 생물 소음, 선박 소음, 항적 등에 의한 클러터로 인하여 오경보율이 매우 높다. 본 논문에서는 연안 환경에서 능동 소나에서 클러터에 강인한 탐지 알고리듬을 제안한다. 제안된 알고리듬은 측정치 추출 시 신호의 통계적인 특징을 이용하는 Constant False Alarm Rate(CFAR)와 클러스터링 알고리듬을 이용하여 클러터 제거율을 높인다. 제안 된 탐지 알고리듬은 해상 시험을 통하여 검증하였으며, 약 96 % 이상의 클러터를 제거하였다. High frequency active sonar is appropriate for detecting small targets such as a diver in coast environment. In case of using high frequency active sonar in shallow coastal environment, a false alarm rate is high due to clutters caused by marine biological noise, ship noise, wake, etc. In this paper, we propose an algorithm for target detection which is robust against clutter in active sonar system in shallow coastal environment. The proposed algorithm increases the rate of reduction clutter using calculation of statistical characteristics of signal and a clustering method. The algorithm is evaluated and analysed with sea trial data, as a result, that shows the rate of reducing rate of clutter of 96 % and over.

Cu-Cu 열압착 웨이퍼 접합부의 계면접합강도에 미치는 $N_2+H_2$ 분위기 열처리의 영향

장은정,김재원,현승민,이학주,박영배,Jang, Eun-Jung,Kim, Jae-Won,Kim, Bioh,Matthias, Thorsten,Hyun, Seung-Min,Lee, Hak-Joo,Park, Young-Bae 한국마이크로전자및패키징학회 2009 마이크로전자 및 패키징학회지 Vol.16 No.3

3차원 소자 집적을 위한 저온접합 공정 개발을 위해 Cu-Cu 열 압착 접합을 $300^{\circ}C$에서 30분간 실시하고 $N_2+H_2$, $N_2$분위기에서 전 후속 열처리 효과에 따른 정량적인 계면접착에너지를 4점굽힘시험법을 통해 평가하였다. 전 열처리는 100, $200^{\circ}C$의 $N_2+H_2$ 가스 분위기에서 각각 15분간 처리하였고, 계면접착에너지는 2.58, 2.41, 2.79 $J/m^2$로 전 열처리 전 후에 따른 변화가 없었다. 하지만 250, $300^{\circ}C$의 $N_2$ 분위기에서 1시간씩 후속 열처리 결과 2.79, 8.87, 12.17 $J/m^2$으로 Cu 접합부의 계면접착에너지가 3배 이상 향상된 결과를 얻을 수 있었다. Cu-Cu thermo-compression bonding process was successfully developed as functions of the $N_2+H_2$ forming gas annealing conditions before and after bonding step in order to find the low temperature bonding conditions of 3-D integrated technology where the quantitative interfacial adhesion energy was measured by 4-point bending test. While the pre-annealing with $N_2+H_2$ gas below $200^{\circ}C$ is not effective to improve the interfacial adhesion energy at bonding temperature of $300^{\circ}C$, the interfacial adhesion energy increased over 3 times due to post-annealing over $250^{\circ}C$ after bonding at $300^{\circ}C$, which is ascribed to the effective removal of native surface oxide after post-annealing treatment.

Comparison of Oral Micronized Progesterone and Dydrogesterone as a Luteal Support in Intrauterine Insemination Cycle

장은정,지병철,김상돈,이정렬,서창석,Jang, Eun-Jeong,Jee, Byung-Chul,Kim, Sang-Don,Lee, Jung-Ryeol,Suh, Chang-Suk The Korean Society for Reproductive Medicine 2010 Clinical and Experimental Reproductive Medicine Vol.37 No.2

Objective: To compare the clinical outcomes between oral micronized progesterone and dydrogesterone as a luteal phase support in stimulated intrauterine insemination (IUI) cycles. Methods: A retrospective analysis was performed in 183 IUI cycles during January 2007 to August 2009. Superovulation was achieved by using gonadotropins combined with or without clomiphene citrate. The luteal phase was supported by oral micronized progesterone 300 mg/day (n=136 cycles) or dydrogesterone 20 mg/day (n=47 cycles) from day of insemination. Results: There were no significant differences in clinical characteristics such as age of female, infertility factors, number of mature follicles ($\geq$16 mm), total motile sperm counts, and endometrial thickness on triggering day between the two groups. The clinical pregnancy rates per cycle were similar between the two groups (21.3% in the micronized progesterone group vs. 19.1% in the dydrogesterone group, p=0.92). The clinical miscarriage rate tended to be 3-fold higher in the micronized progesterone group (34.5% vs. 11.1%, p=0.36). Conclusion: Supplementation of oral dydrogesterone as a luteal support has similar clinical outcomes compared with oral micronized progesterone. Large-scaled randomized study would be required to confirm our findings. 목 적: 과배란유도 후 자궁강내 인공수정 시술시 황체기 보강으로서 경구 미분화 프로게스테론 투여법과 경구 디드로게스테론 투여법의 임상적 효용성을 비교하고자 하였다. 연구방법: 2007년 1월부터 2009년 8월까지 시행된 과배란유도 후 자궁강내 인공수정 시술 183주기를 후향적으로 분석하였다. 과배란유도는 성선자극호르몬 단독 또는 클로미펜과 성선자극호르몬의 병합요법을 사용하였다. 136주기에서는 황체기 보강으로서 경구 미분화 프로게스테론을 하루 300 mg으로 투여하였고 47주기에서는 디드로게스테론을 일일 20 mg으로 투여하였다. 결 과: 여성의 연령, 불임 인자, 성숙난포수 ($\geq$16 mm), 총운동성정자수, triggering 날의 자궁내막 두께는 두 군간 유의한 차이가 없었다. 자궁내 태낭이 확인되는 임상적 임신율은 미분화 프로게스테론 투여군에서 21.3%, 디드로게 스테론 투여군에서 19.1%로 차이가 없었다 (p=0.92). 유산율은 미분화 프로게스테론 투여군에서 다소 높은 경향을 보였으나 통계학적인 차이는 없었다 (34.5% vs. 11.1%, p=0.36). 결 론: 황체기 보강으로서 경구 디드로게스테론 투여법은 경구 미분화 프로게스테론 투여에 비하여 비슷한 임신율과 유산율을 보였다. 그러나 상대적으로 디드로게스테론 투여군의 수가 적어 좀더 많은 환자를 대상으로 한 전향적 연구가 필요하다.

SNS 기반 토론에서 SNS 도구, 창의적 토론 기법과 집단의 크기에 따른 SNS 토론 전략 탐색

장은정 ( Eun Jung Jang ),장혜정 ( Hea Jung Chang ) 한국교육정보미디어학회(구 한국교육정보방송학회) 2013 교육정보미디어연구 Vol.19 No.4

본 연구는 SNS(Social Network Service)를 토론학습에 활용하기 위한 SNS 토론 전략을 제안하기 위해 SNS 도구를 카카오톡과 페이스북으로, 토론 기법을 PMI 기법과 6색 사고모자 기법으로, 집단의 크기를 소집단(3~4명)과 중집단(12~13명)으로 구분하여 토론의 참여도, 만족도 및 성취에 대한 자기평가를 분석함으로써 SNS 토론학습의 효과성을 검증하였다. 본 연구는 총 66명의 대학생을 대상으로 카카오톡 집단 29명과 페이스북 집단 37명으로, PMI 집단 33명과 6색 사고모자 집단 33명으로, 소집단 14명과 중집단 52명으로 구분하여 토론을 진행하였다. 두 집단의 차이를 분석하기 위해 t 검정을 실시하고 Nvivo를 통해 질적 분석을 하였다. 그 결과, 첫째, 카카오톡 집단과 페이스북 집단, 그리고 PMI 집단과 6색 사고모자 집단 모두는 참여도에 차이가 없었으며, 만족도 및 성취에 대한 자기평가 결과도 유의미한 차이가 없이 모든 집단이 3.5 이상의 만족을 보였다. 둘째, 소집단은 중집단보다 .05 수준에서 만족도가 더 높은 유의미한 차이가 있어, SNS 토론에서 소집단이 더 적합한 것으로 나타났다. 셋째, SNS 토론 전략으로는, 토론 기간은 1주일 이내로, 토론 인원은 3~4명 내외의 소그룹으로 구성하는 것이 적정하며, 토론에 대한 세부적인 규칙을 마련한 후 토론에 참여하도록 오리엔테이션을 강화할 필요가 있었다. This study was for suggestions of SNS(Social Network Service) discussion strategies using SNS discussion learning. Kakao-Talk and Facebook were classified as experiment equipment. PMI technique and Six Thinking Hats were classified for creative thinking ability technique. There were three to four people for small groups and twelve to thirteen people for middle groups to verify the effectiveness analyzing participation, satisfaction and self-evaluation of achievement. This study was experimented on sixty-six university students who take the class of teaching professions dividing twenty-nine students for Kakao-Talk groups and thirty-seven students for Facebook groups in Seoul for a week. Also, there were variables that thirty-three students for PMI technique, thirty-three students for Six Thinking Hats and fourteen students for small group, fifty-two students for middle group to discuss for a week. T test was implemented for differences analysis between groups. Meanwhile, quality analysis was implemented about the pros and cons of the discussions through Nvivo. Consequently, firstly, between Kakao-talk and Facebook groups, and between PMI technique and Six Thinking Hats groups are no differences of participation and in terms of satisfaction and achievement, they are satisfied over 3.5. Secondly, small group is more satisfied than middle group for discussion in these groups(p<.05). This result shows that small group is more suitable than another. Lastly, within a week is appropriate for the discussion period and three to four people are suited for SNS discussion. Also, it needs to make detailed regulations and to guide students before discussion.

웹 기반 토론과 SNS 기반 토론에서 사회적 실재감, 몰입, 만족도 및 자기평가의 차이

장은정 ( Eun Jung Jang ),장혜정 ( Hea Jung Chang ) 한국교육공학회 2013 교육공학연구 Vol.29 No.1

트라우마를 가진 노인들의 자기회복을 위한 무용동작치료 사례연구

장은정(Eun Jung JANG) 한국무용동작심리치료학회 2017 무용동작심리치료연구 Vol.1 No.2

본 연구는 트라우마를 가진 노인들의 자기회복을 위한 무용동작치료 사례연구이며, 제주 4·3사건을 경험한 노인들을 중심으로 진행되었다. 제주 A지역에 위치한 경로당에서 4·3사건을 경험한 70세∼90세 노인을 대상으로 매주 2회 집단 무용동작치료 프로그램을 실시하였다. 본 검증을 위해 노인들의 특성을 고려하여 비디오기록 관찰, 협력관찰을 위해 LMA(Laban Movement Analysis)의 Space/Shape 변화를 관찰하였다. 본 연구결과는 첫째, Shape 변화는 자신과 환경과의 깊은 관계에 대한 변화를 표출하는데 이용되었다. 그리고 호흡할 때의 리듬은 신체의 형태를 부여하는데 중요한 역할을 하는 것으로 나타났다. 둘째, Space 변화는 움직임이 이뤄지는 공간과 타인과의 상호의사소통을 이루는 질적인 측면이 관찰되었다. 특히 개인공간에 주로 머물고 있는 노인들의 움직임에서 공간을 지각하며 상대방과 교류하는 일반 공간으로까지 움직임이 확대되는 것으로 나타났다. 즉 무용동작치료 프로그램이 트라우마를 가진 노인들의 자기회복을 위한 확장과 공간지각의 활용 등으로 변화되는 것을 알 수 있었다. This study is a case study of Dance/Movement Therapy for the self - recovery of the elderly with trauma, and it was conducted with the elderly who experienced the Jeju 4·3 incident. A group Dance/Movement Therapy program was conducted twice a week for seniors aged 70 to 90 who experienced 4·3 incident in Jeju A region. For this verification, Space / Shape change of LMA (Laban Movement Analysis) was observed for observation of video record and collaboration considering the characteristics of the elderly. The results of this study were as follows: First, the Shape change was used to express the change in the relationship between the self and the environment. And rhythm in breathing plays an important role in giving shape of body. Second, the Space change was observed in the space where movement takes place and the qualitative aspect that makes mutual communication with others. Especially, the movement of elderly people who are mainly staying in the personal space is extended to the general space where they perceive the space and communicate with each other. In other words, it was found that the program for dance motion therapy is changed by the extension of self - recovery and utilization of spatial perception of the elderly with trauma.

췌장의 편평상피 선암

장은정(Eun Jung Jang),한영석(Young Seok Han),최동락(Dong Lak Choi),김호각(Ho Gak Kim) 대한외과학회 2008 Annals of Surgical Treatment and Research(ASRT) Vol.75 No.6

Adenosquamous carcinoma of the pancreas is a rare tumor that has a less than favorable prognosis because of its aggressive biological behavior. A 47-year-old man was admitted with complaints of right upper quadrant pain of the abdomen. Abdominal computed tomography (CT) demonstrated a low density solid mass lesion in the uncinate process of the pancreas. Dynamic CT, fine needle aspiration by endoscopic ultrasound and the cytological examination by endoscopic retrograde cholangiopancreatography were performed for making the preoperative diagnosis, but the results were a disappointment. Pylorus preserving pancreatoduodenectomy was performed. The resection specimen was composed of squamous cell carcinoma components mixed with adenocarcinoma. The patient stopped further treatment after his 1st chemotherapy cycle because of his poor condition, which due to multiple metastases to the liver and lymph nodes. We report here on a case of adenosquamous carcinoma of the pancreas and we review the relevant Korean literature.

반복된 위궤양 천공 환자에서 우연히 발견된 원발성 간 카르시노이드종양

장은정(Eun Jung Jang),한영석(Young Seok Han),최동락(Dong Lak Choi),박재복(Jae-Bok Park) 대한외과학회 2008 Annals of Surgical Treatment and Research(ASRT) Vol.75 No.1

The liver is a common site for carcinoid metastases, and primary hepatic carcinoid tumor (PHCT) is a very rare entity. The diagnosis of PHCT is principally based on the histopathological confirmation of carcinoid tumor and the exclusion of a nonhepatic primary tumor. A 45-year-old man who presented with an intraabdominal abscess caused by recurrent peptic ulcer perforation had a huge heterogeneous mass in the central portion of the liver. The preoperative impression was peripheral cholangiocellular carcinoma. Central bisectionectomy was performed together with difficult adhesiolysis. On surgical exploration, there were no extrahepatic lesions. The postoperative course was uneventful, except for biloma formation, and the pathologic biopsy result was carcinoid tumor with positive immunohistochemical staining for chromogranin A. Our patient has been free of symptoms, including peptic ulcer, and there have been no abnormal findings on the follow-up abdominal images for 1 year. Accordingly, the diagnosis was primary hepatic carcinoid. In conclusion, PHCT should be diagnosed by the absence of extrahepatic lesion on surgical exploration and follow up throughout the clinical and imaging studies. A preoperative suspicion of PHCT is significant for conducting clinical investigations of a tumor’s characteristics.

연료물성에 따른 경유 차량의 저온성능 영향 연구

장은정(Eun-Jung Jang),김성우(Sung-Woo Kim),민경일(Kyung-Il Min),박천규(Cheon-Kyu Park),하종한(Jong-Han Ha),이봉희(Bong-Hee Lee) 한국에너지학회 2015 에너지공학 Vol.24 No.2