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.

Material Girls : Sexual Perceptions of Korean Teenage Girls who have experienced 'Compensated Dates'

KONG, Mee-Hae Ewha Womans University Press 2003 Asian Journal of Women's Studies(AJWS) Vol.9 No.2

The purpose of this study is to examine sexual perceptions and conflicts among Korean teenage girls who have been involved in 'compensated dates,' which is a form of sex work that may be temporarily undertaken by young girls or may lead on to prostitution. I have collected data from 12 girls, using in-depth interviews, who had experienced sexual abuse, and economic deprivation. These girls were rather maladjusted and had been abandoned by their families and schools. Their involvement in compensated dates began out of economic necessity, as they had run away from home. Sexual abuse was reportedly common for the majority of the respondents who had also suffered poverty and unhappy family lives. So these girls tended to seek compensated dates to overcome poverty. With poor education and skills, the girls viewed compensated dates as an easy strategy in the face of privation. In addition, the consumer society encouraged them to become sexually promiscuous to earn money, in order to buy and own more and more goods. The sexual conflict and ambivalence experienced by them were outcomes of their sense of sexual subjectivity. They saw their bodies as resources that were exchangeable for money, but they did not realize the internalized oppression they endured. They knew their bodies were a means of pleasure, but did not realize that sexual violence underlies it. The development of a stronger sense of self may resolve the conflict between the girls' curiosities and experiences concerning their bodies and sexuality.

김치담금재료의 미생물 오염상태와 오존처리효과

김미정,김미경,오영애,김미향,김순동 대구효성가톨릭대학교 식품과학연구소 1992 식품과학지 Vol.4 No.-

배추김치 담금재료의 미생물 오염상태를 조사하고 동시에 ozone처리에 의한 청정화 효과를 검토하였다. 배추, 고추 마늘 및 생강의 오염정도를 부위별 또는 생태별로 조사해 본 결과 세균수는 24.67-334.96×10 exp (4)범위였으며, 곰팡이+효모는 17.89-274.50×10 exp (4) 범위이었다. 미생물 오염 정도는 배추의 경우 겉부분 보다 속부분과 상부에서 높았다. 또 고춧가루는 무포장이 포장한것 보다 8-9배의 높은 오염도를 나타내었다. 마늘은 깐마늘의 경우가 까지않은것 보다 6-7배의 높은 오염도를 보였다. 고추의 미생물 오염도는 숙도가 높을 수록 높았으며 표면보다 내부의 오염도가 높았다. 배추를 흐르는 수돗물로 세척한 결과 세척 20분 동안에 총균의 46%가 제거되었으나 그 이상의 세척효과는 없었다. 오존수에 의한 세척은 오존농도 6㎎/ℓ/sec에서 0.5-1시간 처리시 총균의 92-95%가 제거되었으며, 개스상의 오존을 동일 동도로 처리하였을 때는 86-89%가 제거되었다. 오존을 처리시에 생존한 미생물은 유도기가 연장되었으며, 생육도도 현저하게 낮았다. This study examined the microbial contamination in the soaking materials of Chinese cabbage kimchi and cleaned effect by ozone treatment. of the kimchi. In Chinese cabbage, red pepper powder, garlic and ginger, the mumber of bacteria was 24.67-334.96×10 exp (4) and that of mold and yeast was 17.89-247.50×10 exp (4). Microbial contamination was higher in the outer and upper part of cabbage than in the inner part. The contamination was 8-9 times higher in unpackaged red pepper powder than in packaged one. That was 6-7 times higher in peeled garlic than in unpeeled one. As a result of washing by tap water for 20min, 46% of the total number of microbe in Chinese cabbage was eliminated. 92-95% of that was eliminated by treatment of ozone water 6㎎/ℓ/sec for 0.5-1.0 hour whereas 86-89% of that was eliminated by treatment of ozone gas. The lag phase of survival microbes was extended but the growth of the microbes inhibited by the treatment of ozone.

교육과정 개정국면에서 본 문학교육 : 문학 교육과정의 교재화 과정 검토와 제언

최미숙 ( Mee Sook Choi ) 한국문학교육학회 2011 문학교육학 Vol.35 No.-

A Study and Suggestions on the Process of Developing Teaching Materials of the Literature Curriculum Choi, Mee-Sook This study purposed to examine various problems raised in the process of implementing the contents of the literature curriculum into textbooks from the aspects of "how to implement standards", "literary works as materials" and "learning activities" and to suggest solutions for the problems. First, there were many cases that standards themselves contained partially the acceptance or production of works and that only parts contained in standards were presented "as they were" as learning activities of textbooks. That is, standards were limited to partial understanding of literary works instead of the whole understanding or appreciation of the works. In the aspect of materials, discussion was made on the need of more diverse strategies on the curricular dimension for more balanced coverage of canonical works and recent works. A problem in the aspect of learning activities was that many different activities were listed without considering the learning process. With regard to this problem, we discussed the necessity to present learning activities in consideration of the processes of knowledge learning and principle learning. As solutions for these problems, we suggested "the settlement of a textbook screening system for the implementation of diverse creative textbooks", "the development of literature standards oriented to wholeness", "the presentation of the scope of works as the provision of general information", "the review of various reference materials used in school and efforts to solve problems," etc.

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.

산채류의보존과 일본식 절임

오영애,하귀현,박인경,김미향,김미정,김미경,정자림,이명숙,김순동 대구효성가톨릭대학교 식품과학연구소 1992 식품과학지 Vol.4 No.-

This paper showed the summarization of the preservative method of wild vegetables in the house and the precessing method of Japanese pickles. The preservative methods of wild vegetables were explained devided into long, short term, fresh state, heat treatment and drying. Salt, soybean fermented sauce, soybean fermented paste, lees of refined rice wine and residue in the preparation of bean curd were used as the materials of Japanese pickles.

조선시대 충정관의 보존처리

이미식,송미경,배순화,홍문경 국립중앙박물관 2001 박물관보존과학 Vol.3 No.-

강원도 원성군 호저면에서 출토된 조선시대 모자(충정관)를 보존처리하였다. 모자는 양모 펠트 직물로 구성되어 있었으며, 견섬유의 끈으로 장식되어 있었다. 처리 전의 모자는 심하게 오염되어 있었고 좀벌레에 의해 손상된 상태였다. 유물의 처리과정은 부드러운 붓과 핀셋으로 고형오염물을 제거한 후 유물을 지지 할 수 있는 스테인레스 망을 이용하여 퍼클로로에틸렌으로 2차례에 걸쳐 건식세탁하였다. 여분의 용매는 압지법을 사용하여 제거하였다. 세탁 후 유물의 감량률은 7.99%, 세탁 전후 유물의 색차는 2.57을 나타냄으로써 유물에 부착되어 있던 각종 오염물들이 탈락되었으며, 모자의 외관이 깨끗해지고 밝아졌다. 세탁 후 견봉사를 이용하여 장식용 끈들을 제자리에 고정시키고 모자의 모양을 잡아주는 보수 작업을 실행하였다. The hat excavated from the tomb of Hojeo-myon Wonsung-gun in Kangwon province was dry-cleaned and restored. The hat was made of wool felt and decorated with several strands of silk cord. It was very dirty and moth-eaten. After getting rid of the particle soils on a surface with painting brush, the hat was dry-cleaned using perchloroethylene applying the minimum force, and blotting paper was used for drying. During cleaning, it was supported by the stainless steel net. The weight loss was 7.94% after cleaning. The soils sticked on the hat was removed clearly. The texture of the hat became softer after cleaning. Color difference(∆E) was 2.57, which is a noticeable change. The color became clear and changed to the red and yellow range. After dry-cleaning, the hat was repaired. Dislocated silk cords were fixed to the right place by stitching with silk yarn. To keep the shape of the hat, it should be supported by a hat-shaped stiff net during exibition and storing.

식품부패 및 식중독성 미생물에 대한 쇠비름(Portulace oleracea) 메탄올 추출물의 항균활성과 성분분석

임미경,김미라 한국조리과학회 2001 한국식품조리과학회지 Vol.17 No.6

Soibirhym(Portulace oleracea) was extracted by methanol and its antimicrobial activities against food spoilage or foodborne disease microorganisms were investigated by the paper disc method. The microorganisms used in this experiment included 5 species of bacteria(Escherichia coli, Pseudomonas aeruginosa, Salmonella typhimurium, Klebsiella pneumoniae, Staphylococcus aureus) and 3 species of fungi(Fusarium solani, Aspergillus flavus, Penicillium citreonigrum). Soibirhym showed high antimicrobial activities against P. citreonigrum, P. aeruginosa and K. pneumoniae. Minimum inhibitory concentrations(MICs) on S. aureus, P. citreonigrum and K. pneumoniae were 200, 200 and 250 ㎎/mL, respectively. In the methanol extracts from Soibirhym, 147 kinds of compound were separated by GC/MS. The extraction yields of phenolics, furans, alcohols, acids and esters, ketones, aldehydes, and miscellaneous compounds were 7.43%, 6.13%, 2.20%, 41.06% 9.21%, 0.15% and 1.08%, respectively. Some antimicrobial compounds such as 2,3-dihydro-benzofuran, 4-hydroxy-3-methoxy-benzoic acid, 4-hydroxy benzeneethanol were detected in the methanol extract.

집단미술치료 프로그램이 발달장애 아동 어머니의 자기발견에 미치는 효과

박미혜,이정미 한국초등특수교육학회 2005 초등특수교육연구 Vol.7 No.1

임신성 영양모세포 질환에서 bcl-2 및 p53 단백 발현의 상관성에 관한 면역조직화학적 연구

조미연,송지선,김윤미,이상엽,정순희,이광길 연세대학교 원주의과대학 1999 원주의대논문집 Vol.12 No.1