MEE법으로 성장한 InAs/GaAs 양자점의 발광특성

오재원,변혜령,류미이,송진동,Oh, Jae Won,Byun, Hye Ryoung,Ryu, Mee-Yi,Song, Jin Dong 한국진공학회 2013 Applied Science and Convergence Technology Vol.22 No.2

Migration-enhanced epitaxy 성장한 InAs/GaAs 양자점(quantum dots)의 광학적 특성을 PL (photoluminescence)과 Time-resolved PL 이용하여 분석하였다. InAs 양자점은 In을 9.3초 공급하고 5초 차단한 후 As을 3초, 4초, 6초, 또는 9초 공급하고 5초 차단하는 과정을 3회 반복하여 성장하였다. As을 3초 공급한 시료의 PL 피크는 1,140 nm에서 나타나고, PL 세기는 다른 세 시료에 비해 매우 약하게 나타났다. As 공급시간을 3초에서 증가하였을 때 모든 PL 피크는 1,118 nm로 청색이동하여 나타났으며, PL 세기는 증가하였다. As을 6초 공급한 시료의 PL 세기가 가장 강하게 나타나고, 반치폭(full width at half maximum)도 가장 좁게 나타났다. 이러한 결과는 양자점의 밀도와 균일도(크기변화)로 설명된다. 또한 발광파장에 따른 PL 소멸시간은 PL 피크 근처에서 가장 길게 나타났다. The luminescence properties of InAs/GaAs quantum dots (QDs) grown by a migration enhanced epitaxy method have been investigated by using photoluminescence (PL) and time-resolved PL measurements. The MEE method supplies materials in a series of alternate depositions with migration enhancing time between each deposition. After In source was supplied for 9.3 s, the growth was interrupted for 5 s. Subsequently, As source was open for 3 (AT3), 4(AT4), 6 (AT6), or 9 s (AT9), and the growth was interrupted for 5 s again. This growth sequence was repeated 3 times for the growth of InAs QDs. The PL peak of the AT3 was 1,140 nm and the PL intensity was very weak compared with that of the other three samples. The PL peak of all samples except the AT3 sample was 1,118 nm, which is blueshifted from 1,140 nm, and the PL intensity was increased compared to that of the AT3. These results can be explained by the increased QD density and the improved QD uniformity. The AT6 sample showed the strongest PL intensity and the narrowest full width at half maximum. The PL decay time of AT6 increased with increasing emission wavelength from 940 to 1,126 nm, reaching a maximum decay time of 1.09 ns at 1,126 nm, and then decreased as the emission wavelength was increased further.

Acoustic Cues to the Perception of the Place of Articulation in English Stops

Ahn, Mee-Jin 배재대학교 인문과학연구소 2005 人文論叢 Vol.22 No.-

이 논문은 영어 파열음의 위치자질을 인식하는데 필요한 음향 단서에 관한 연구이다. 실험의 결과는 페쇄단계, 파열, 기식음, 포만트 추이 각각 모두가 파열음의 위치자질에 대한 음향 단서임을 보여주고, 특히 이 인지 실험은 위치동화 등의 음운현상에 나타난 CV와 VC의 비대칭 현상도 설명해 준다. 그러나 무성파열음의 경우, 폐쇄나 파열, 기식 등의 단서를 제외하고 모음 부분만을 들려주었을 때에는 위치자질을 인식하는데 CV와 VC의 비대칭은 나타나지 않음을 보여준다. 또한 경구개 파열음의 위치자질의 인식에 있어서는 순음이나 치경음보다 파열 단서에 더 많이 의존한다는 결과를 나타낸다.

상담과 굿의 구조와 현상의 비교연구 : A Comparison of Structure and Phenomenon

오진미 덕성여자대학 학생생활지도연구소 2005 學生生活硏究 Vol.21 No.-

한국인의 상담은 한국적 문화의 기초 위에서 이루어져야 한다. 한국 문화에 있어서 상담에 상응하는 것으로는 전통적인 굿의 문화를 들 수 있다. 본 연구는 굿의 특성과 과정을 분석함으로써 굿과 상담의 구조와 현상을 비교 연구 하는 것이다 본 논문은 세 가지 문제를 전제한다. 첫째는 현재 일상화된 상담이론과 기법이 우리 현실 또는 문화에 적절한 것인가 하는 적합성 여부의 문제이고, 둘째는 만약 그것이 충분히 적합한 것이 아니라면 그 원인은 어떤 것인가 하는 문제이고, 셋째는 적합성을 담보할 수 있는 새로운 대안적 상담이론과 기법은 무엇인가 하는 문제이다. 이 문제들은 각기 상담과 문화와의 관계에 대한 새로운 관심, 그리고 '굿'현상을 통해서 관찰되는 일종의 상담 현상 등으로 구체화 시켜서 연구하였다. '굿'을 체험한 '내담자'의 경험, '굿'을 진행한 무당의 경험, 그 두 요소가 한데 어울리는 '굿'의 과정을 관찰하고 구조화한 후 상담현상과 비교분석 하였다. 직접 굿을 한 내담자의 경험과 무담의 경험 그리고 굿을 관찰하고 분석한 결과 굿의 구조에서 상담적 현상을 발견할 수 있었다. 인간관, 상담과정, 상담의 목표, 상담자의 역할, 내담자의 역할 그리고 상담자와 내담자와의 관계 등에서 나타난 굿의 구조와 현상은 상담의 구조와 현상과 다르지 않았다. Counseling should be practiced referring to a special cultural factor to which client belongs. In Korea, Kut, a popular religious ritual performed by Mudang, has been played the role of counseling among the people so long time forming a fundamental structure of problem solving and therapeutic process. In other words, Kut is a ceremony playing therapeutic process of psychological agony(Han) by Mudang. The purpose of this study is to compare a counseling model with this traditional therapeutic process of Kut. Basically the research has been done by a participant observation. The phenomena and structure of Kut itself was analysed systematically, and 7 Mudang and 7 client were interviewed respectively by author to recognize the therapeutic properties of Mudang and clients’ experiences before and after the Kut. The data were analyzed qualitatively using the methodological procedures of grounded theory and phenomenological research. Therapeutic processes and factors were examined and patternized. The conclusions so far this research has produced are as followings. The first, Mudang is serious as the ordinary counselors in concerning his or her function and role. Mudang consciously recognizes himself as a devotee for the ‘spiritual welfare’ of the people. He or she tries to be not a ‘listening counselor’ but to be a ‘sympathy-uttering counseler.’ The second, Mudang’s focus on the clients are not only on their current life situations, nor on their personal past, but also on the wide net of relationship of a client’s life world. For Mudang, a client is not a simple individual being but a person who is in a net of relationships with his or her own self. It is natural that no client has final and total responsibility for his or her agonies and problems. But it does not mean that the clients are free from his or her responsibility, but to confirm that the net-relationship is more fundamental for human problems. The third, the most significant outcome is that for a client the agony or Han becomes an endurable thing, and Kut is the most appropriate healing process for the person who cries his or her Han. Therefore it would be asserted that Kut might be suggest an alternative counseling for Koreans. Of course it does not mean that Kut is the sole selective way to solve client’s problem. But considering the cultural factor it would be an another available approach to build up more effective practical counseling for Koreans.

1989學年度 德成女子大學校 新入生의 特性에 對한 調査硏究

吳眞美 덕성여자대학교 학생생활연구소 1989 學生生活硏究 Vol.9 No.-

에폭시/TETA계의 경화 및 물성 연구

홍진후,박미영,김현경 조선대학교 생산기술연구소 1999 生産技術硏究 Vol.21 No.2

The curing of diglycidyl ether of bisphenol A (DGEBA) with triethyl-enetetramine (TETA) under controlled thermal conditions was discussed. A real-time FT-IR ATR was employed to determine crosslinking reactions and degree of cure. Infrared 914cm^(-1) band was used to monitor the conversion of the reactions. To measure the thermal mechanical properties of the various systems, DMTA was employed. Results of ATR and DMTA data show that optimum TETA/DGEBA ratio was about 0.1. When the ratio was higer than 0.1. a phase separation was occurred with short pot life. It is demonstrated that real-time FT-IR ATR is powerful technique to better understand the formulation-process-property relationship of the Epoxy ITETA system.

1999학년도 덕성여대 시설·복지·제도에 관한 본교생들의 의견 조사 연구

오진미 덕성여자대학교 학생생활연구소 1999 學生生活硏究 Vol.15 No.-

본 조사연구는 시설ㆍ복지ㆍ제도에 관한 본교생들의 의견 조사 결과를 토대로 교육환경ㆍ개선에 대한 구체적인 대안을 마련한 것이다. 조사대상은 1999학년도 덕성여대 재학중인 학생 전체이다. 조사방법은 질문지를 사용하여 의견조사를 실시하였다. 분석된 자료는 총 3,391부(66%)이다. 5점척도(1점 매우불만~5점 매우만족)로 측정한 결과 총평균이 2.63이다. 학생들의 만족도는 전년도에 비해(2.49) 높아졌으며, 평균은 보통(3점)보다는 낮은 점수를 보이고 있다. 본교생들의 의견을 토대로 한 종합적인 대안을 반영한다면 만족도 상승과 더불어 질적인 교육환경이 기대되며, 새로운 도약의 밑거름이 될 것이다. The present survey was conducted to investigate the student's opinion of the educational and welfare facilities and the administrative system of Duksung Women's University in 1997. The number of the students who responded to the questionare is 3,391(66%) out of 5,160 students which is about 63% of the group. Student's satisfaction on the educational and welfare facilities and the administrative system was measured on 5-point scale (1 : very unsatisfied, 2 : unsatisfied, 3 : so-so, 4 : satisfied, 5 : very satisfied). The mean was 2.63. These results show that students' satisfaction is decreasing compare to the former years. According to the fact, it would be inacribed that the current innovation project of educational environment should be not only innovated but also restructured by the changing life style of the students and society.

1997학년도 덕성여대 시설·복지·제도에 관한 본교생들의 의견 조사 연구

오진미 덕성여자대학교 학생생활연구소 1997 學生生活硏究 Vol.13 No.-

본 조사연구는 시설 복지 제도에 관한 본교생들의 의견 조사 결과를 토대로 교육환경 개선에 대한 구체적인 대안을 마련한 것이다. 조사대상은 1997학년도 덕성여대 재학중인 학생 전체이다. 조사방법은 질문지를 사용하여 의견조사를 실시하였다. 분석된 자료는 총 3,210부(63%)이다. 5점척도(1점 매우불만~5점 매우만족)로 측정한 결과 총평균이 2.64이다 학생들의 만족도는 전년도에 비해(2.44) 증가하였다. 그러나 평균은 보통(3점)보다 낮은 점수를 보이고 있다. 본교생들의 의견을 토대로 한 종합적인 대안을 반영한다면 만족도 상승과 더불어 질적인 교육환경이 기대되며, 새로운 도약의 밑거름이 될 것이다. The present survey was conducted to investigate the stuedents' opinion of the educational and welfare facilities and the administrative system of Duksung Women's University in 1997. The number of the students who responded to the questionare is 3,210(63%) out of 5,160 students' which is about 63% of the group. Students' satisfaction on the educational and welfare facilities and the administrative system was measured on 5-point scale (1 : very unsatisfied, 2 : unsatisfied, 3 : so-so, 4 : satisfied, 5 : very satisfied), The mean was 2.64. These results show that students' satisfaction is increasing. But in general students' demonstrated unsatisfactory response (2.64<3) to the educational and welfare facilites and the administrative system. The conclusion of the research clearly demonstrated that the satisfaciton of students' are steadily increasing. According to the fact, it can be deacribed that the innovations of educational environments as a process of transformation of the quality of education for the promising future.

1986학년도 덕성여자대학 신입생의 특성에 대한 조사연구

吳眞美 덕성여자대학교 학생생활연구소 1987 學生生活硏究 Vol.7 No.-

청소년의 인터넷 활용이 자아정체감에 미치는 영향에 관한 연구

박미석,조혜진 숙명여자대학교 출판부 2002 生活科學硏究誌 Vol.17 No.-

The purpose of the present research was to provide basic materials for groping for the methods that promote adolescents' self-identity through the utilization of the internet. After scrutinizing the actual conditions of adolescents' use of the internet, this study examined the effect of adolescents' family environment, friendships, and use of the internet on their self-identity. Specifically, the present research sought to explore the utilization of the internet by sociodemographic and family environment variables, the effect of background variables on the psychological variable, as well as the relative effects of background variables and the internet-related variables on the psychological variable. The major findings of the study were as follows: The effect of the various variables on adolescents' self-identity showed that the higher the levels of school record, communication with fathers, communication with mothers, intimacy of friendships, and the use of the internet, and the lower the degree of the internet addiction, the higher the level of self-identity. The findings of this research indicate that the level of internet utilization and its addiction among family environment-related variables exerted significant influence on self-identity. This implies that the proper use and guidance of the internet is crucial to adolescents' self- identity, and the use of the internet needs to be guided by families, schools, and communities.

자외선 경화형 아크릴 모노머를 통한 옻칠 개질 및 코팅 물성 연구

홍진후,박미영,김현경,박기주 조선대학교 생산기술연구소 1998 生産技術硏究 Vol.20 No.2

UV-Curable acryl monomer containing quaternary ammonium salt has been synthesised and Introduced into the orintal lacquer by dual curing method. Electrical and thermal mechanical properties were studied in view of the interpenetrating polymer network theory. Although modification of oriental lacquer could not introduce antistatic properties into coating network, tremendous improvement in the properties of breaking voltage was observed.