Nanogenerators: Fully Rollable Transparent Nanogenerators Based on Graphene Electrodes (Adv. Mater. 19/2010)

Choi, Dukhyun,Choi, Min-Yeol,Choi, Won Mook,Shin, Hyeon-Jin,Park, Hyun-Kyu,Seo, Ju-Seok,Park, Jongbong,Yoon, Seon-Mi,Chae, Seung Jin,Lee, Young Hee,Kim, Sang-Woo,Choi, Jae-Young,Lee, Sang Yoon,Kim, Jo WILEY-VCH Verlag 2010 ADVANCED MATERIALS Vol.22 No.19

<B>Graphic Abstract</B> <P>The cover shows an image of fully rollable transparent nanogenerators synthesized using chemical vapor deposition grown large-scale graphene sheets as transparent electrodes and piezoelectric ZnO nanorod arrays. Sang-Woo Kim, Jae-Young Choi, and co-workers report on p. 2187 the electrical and structural stability of the nanogenerators, with excellent charge scavenging performance under external mechanical loads such as bending and rolling. This study shows that graphene-based nanogenerators are very promising for self-powered rollable transparent device applications. <img src='wiley_img_2010/09359648-2010-22-19-ADMA201090066-content.gif' alt='wiley_img_2010/09359648-2010-22-19-ADMA201090066-content'> </P>

A Basic Study on Leaf and Stem Production of Angelica acutiloba

Choi,Seong-Kyu,Yun,Kyeong-won,Chon,Sang-Uk,Lee,Jong-Ill,Seo,Young-Nam,Seo,Kyoung-Sun,Choi,Kyeong-Ju 한국자원식물학회 2004 Plant Resources Vol.7 No.3

This study was conducted to develop effective production system in greenhouse for leaves and stems of Angelica acutiloba by using connect pots in 2003 and 2004. Seed germination rate and plant biomass of Angelica acutiloba collected in 2004 were higher than those harvested in 2003. Germination rate of Angelica acutiloba seeds collected in 2003 was 10%, while germination rate of seeds collected in 2004 was above 90%. Especially, plant growth and yield of Angelica acutiloba grown in connect pots sized with 4×4×5cm(length×width×height) were the highest. These results indicate that leaf and stem production of Angelica acutiloba can be improved by using connect pots and optimizing seed collecting time in greenhouse.

Aspergillus oryzae를 이용한 캡슐형 메주의 품질특성

최재훈,권선화,이상원,남상해,최상도,박석규 한국식품저장유통학회 ( 구 한국농산물저장유통학회 ) 2003 Food Science and Preservation Vol.10 No.3

전통메주의 표면에서 발행하는 야생곰팡이 착생, 유해곰팡이에 대한 mycotoxin 생성 및 메주 표면의 과도한 건조 등을 해결하기 위하여 메주 외층에 Aspergillus oryzae로 만든 쌀 종국(0.3%, w/w)을 혼합시킨 증자 검정콩으로 얇게 코팅한 후, 25℃, 상대습도 80%에서 14일간 발효시킨 캡슐형 메주를 개발하였다. 캡슐형 메주의 표면에서 야생곰팡이의 오염은 발견되지 않았으나, 대조구 메주는 12일 이후에 푸른곰팡이가 많이 관찰되었다. 메주의 수분 함량은 평균 32.7%로서 34.7~29.4%의 범위를 나타내었다. 적정산도는 캡슐형 메주가 대조구 메주보다 높게 나타났으며, 대두 캡슐형 메주와 검정콩 캡슐형 메주는 비슷하게 나타났다. 유리당의 함량은 검정콩 캡슐형 메주가 123.98㎎%로 대조구 메주 15.02㎎%와 대두 캡슐형 메주 59.85㎎%보다 각각 10배, 2.1배, 높게 나타났다. 아미노산성 질소의 함량은 대조구 메주에서 147.00㎎%였으며, 검정콩 캡슐형 메주는 255.50㎎%로서 대두 캡슐형 메주 187.25㎎%보다 약 1.37배 높은 함량을 나타내었다. 총 유기산의 함량은 캡슐형 메주(대두 119.98㎎%, 검정콩 95.94㎎%)가 대조두 메주(26.44㎎%)보다 함량이 높게 나타났으며, 캡슐화에 따라 lactic acid와 malic acid 가 가장 큰 변화를 나타내었다. 색차계 색도는 검정콩 캡슐형 메주가 대두 캡슐형 메주보다 명도값(L)이 크게 나타났으며 지방산 조성은 메주의 종류에 따라 큰 차이를 나타내지 않았다. 총 유리 아미노산의 함량은 검정콩 캡슐형 메주(1039.70㎎%)가 대두 캡슐형 메주 (556.07㎎%)와 대조구 메주(236.45㎎%) 비하여 각각 2.4배, 4.4배 높았다. In order to improve some problems such as contamination of undersirable mold, mycotoxin production and excessive drying on the surface of traditional meju, we developed a capsule type-meju(CM) coated with steamed black bean and Aspergillus oryzae - rice koji(0.3%, w/w) mixture to surface of traditional meju and fermented at 25℃ for 14 days under 80% relative hunmidity. Contamination of undersirable mold on the surface of CM was not detected within 2 weeks and some genus Penicillium molds on control meju without koji were found naturally after 12 days of fermentation. The moisture content of meju was showed to be in the range of 34.7 - 29.4% being 32.7(w/w) of mean value. Titratable acidities in CMs prepared with black bean(BCM) and soybean(SCM) were much higher than that in control meju, and BCM was similar to SCM. Free sugar content in BCM(123.98 ㎎%) was 10 times and 2.1 times higher than that in control meju(15.02 ㎎%) and SCM(59.85㎎%), respectively. Amino type nitrogen content in control meju was 147.00 ㎎% and its content in BCM(255.50㎎%) was 1.37 times higher than that in SCM(187.25 mg%). Total organic acid content in BCM(95.98㎎%) and SCM(119.98㎎%) were much higher than that in control meju(26.44 ㎎%), and then latic and malic acid contents were markedly changed according to capsulation of meju. Lightness value(l) of Hunter color index was much higher in BCM than in SCM. Fatty acid composition of CM was not different as compared to control meju. Total free amino acid content in BCM(1039.70 ㎎%) was 4.4 times and 2.4 times higher than that in control meju(236.45 ㎎%) and SCM(556.07 ㎎%), respectively.

근대기의 경산화파 예운불화 연구

최성규 ( Choi Sung Kyu ) 종교문화비평학회 2016 종교문화비평 Vol.30 No.-

Yeun Sang-kyu was a Buddhist painter, known as “Mother of Buddha Image Paintings(佛母)” who was inherited by Gyeongsan School and kept the tradition intact till 1930. His Buddhist Image paintings are handed down from the mid-19th century on and his painting styles and lineages are well known and even the painting materials he used are cleary identified. So much he is recognized as unique and distinctive. During the late Joseon Period, the Buddhist paintings in the temples are provided and enshrined by the local monk painters and the large temples have accordingly housed a group of monk painters in their own territories. This monk painters were eventually clustered with the painter groups. “The Gyeonseong or the Gyeongsan School” was one of the most active painter groups who got together in Seoul and Gyeonggi area. Yeun`s Buddhist paintings so far extant in terms of iconography or drawing skills reveals inheritances of various styles of the previous traditions; early and late 18th century, or early and late 19th century styles are included. Moreover, on top of those mixture of traditions, he added a new trend of paintings based on the up-coming new cultures. Even western painting skills of shading were imbued with his many a Buddhist paintings and his creative new form of icons and compositions are keenly felt the influences of his direct master Eungseok`s style. His new Buddhist depictions seem to be popular among the connoisseurs and the collectors so that his art objects are spread out through the country. He tried to explore the new experiments with the visual effects, the painting materials and even utilizing of the folk painting subjects. The “Samse-bul-do(三世佛圖)” of Pyochung temple is an example of the modern skills of paintings, quite differed to traditional ones; applying the geometric shape of circles in the screen, newly alloting the Bodhisattvas and the protective figures, reconfiguring the Buddha images, sectional division of the canvas, etc. Likewise, Yeun`s style changes in his extant paintings show us his creativity along with the modern tranformation of Korean Buddhism. And his legacy is handed down to Manbong, who is one of descents of Yeun and connected to today`s Buddhist painting traditions.

개사를 통한 노래부르기가 정신지체아동의 어휘력에 미치는 효과

배정화,최성규 한국특수교육문제연구소 2004 특수교육저널 : 이론과 실천 Vol.5 No.1

본 연구에서는 개사를 통한 노래부르기가 정신지체아동의 수용과 표현어휘력 신장에 미치는 효과를 알아보고자 하였다. 본 연구대상은 부산시에 소재하는 J초등학교 특수학급에 재학 중인 정신지체아동 2명으로 선정하였다. 13개의 동요 등을 개사하여 72개의 표적어휘를 선정하였고, 개사를 통한 노래부르기는 10주에 걸쳐 주 4회씩 총 40회기동안 실시하였으며 매회기는 40분간 실시하였다. 한국표준수용어휘력검사를 이용하여 사전검사와 사후검사에서 어휘력 검사를 각각 2회 실시하였다. 본 연구에서는 개사를 통한 노래부르기가 정신지체 아동의 수용어휘와 표현어휘 신장에 긍정적인 영향을 미쳤음을 제시하였다. 특히 동물과 식물명, 그리고 일반사물, 가정도구, 가정, 사회생활, 여가생활 등과 관련된 명사 어휘의 수용과 표현이 높아지고 동사와 형용사에 대한 수용어휘력도 향상되었다. Mental retardation refers to substantial limitations such as mental intelligibilities and social interaction in present functioning. Especially, language abilities are basic social skill to identity and interact with themselves and others in the society as human beings. Unfortunately, the children with mental retardation are usually exposed in language difficulties. Vocabulary is a fundamental tool to lead smooth language development. The purpose of this study was to illustrate the effects of singing with changed words of songs to develop vocabulary abilities for children with mental retardation. Two children, 10.6(MA5.7) and 11.0(MA7.2) years old, with mental retardation were participated for this study. Thirteen sings were selected, and the words of the songs were changed based on seventy two target vocabularies. Pre- and post-test with Korean Standard Vocabulary Test were utilized to verify the effective of the singing to improve vocabulary ability for forty sessions. Each sessions was for forty minutes. The results of this study were that: (a) the singing strategy was effective to improve the receptive vocabulary ability; and (b) the singing strategy was effective to improve expressive vocabulary ability for children with mental retardation. Therefore, this study concluded that the singing is effective to improve vocabulary ability for mental retardation.

Floristic characteristics of vascular plants and first distributional report of Pseudostellaria baekdusanensis M. Kim in Yongneup wetland protected area

Young-Chul Kim,Hyun-Hee Chae,Sang-Heock Oh,Seung-Ho Choi2,Moon-Pyo Hong3,Gi-Heum Nam,Jae-Yoon Choi,Hyun-Sook Choi,Kyu-Song Lee 한국환경생태학회 2015 한국환경생태학회지 Vol.29 No.2

Yongneup wetland protected area, the only high moor in Korea, is a core area to conserve biodiversity. Even though the Yongneup wetland protected area is relatively small, various plant species are distributed in the Yongneup wetland protected area because it includes various habitats showing different environmental gradients. Vascular plants distributed in the Yongneup wetland protected area were identified as a total of 376 taxa that is composed of 73 families, 217 genera, 322 species, 3 subspecies, 44 varieties and 7 forms. For endangered plants designated by the Ministry of Environment, 5 species including Trientalis europaea var. arctica, Lilium dauricum, Halenia corniculata, Lychnis wilfordii and Menyanthes trifoliata were found and 34 taxa were confirmed to be distributed only in the mountainous wetland habitats. Regarding naturalized plants, a total of 11 taxa were distributed, but most of them were distributed in the areas where artificial interference has occurred. And in areas inside the wetlands that are relatively well preserved, 2 species of Bidens frondosa and Erigeron annuus were observed. In this study, the occurrence and distribution of Pseudostellaria baekdusanensis M. Kim, which was recently found in Mt. Baekdu and reported as a new species, were identified in the Yongneup wetland protected area. A wetland is a very vulnerable area to drastic environmental changes and damages to its ecosystem could cause the extinction of rare plant species which are distributed only in the wetlands. Therefore, it is mandatory that current status of the Yongneup wetland protected area is evaluated and actions to prevent rapid environmental changes are taken. Fourteen separate investigations were conducted in 2013 and another four in 2014, to evaluate current status of the Yongneup wetland protected area. These investigations have provided us the basic information for future actions of conservation and restoration.

플레이트거더의 전단강도

최취경,김태영,서성연,김정석,김상섭,김규석 대한건축학회 2003 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.23 No.1(구조계)

In the design of plate girder web panels, it is required to evaluate accurately the elastic buckling strength under pure shear. Whether or not the post-buckling strength is accounted for. Currently. Elastic shear buckling coefficients of web panels stiffened by transverse intermediate stiffeners are determined by assuming conservatively that web panels are simply supported at the juncture between the flange and the web. Although the notion of the real boundary condition at the juncture of the web and flanges to be somewhere between simple and fixed has been recognized from early days, the boundary condition has been conservatively assumed. Mainly due to lack of means to evaluate it in a rational manner. In this paper. A series of numerical analyses based on a three-dimensional finite element modeling is carried out to investigate the effects of the geometric parameters on the boundary conditions at the juncture between the flange and the web.

학교안전사고에 대한 일반교사와 특수교사의 인식 비교

최성규 국립특수교육원 2005 특수교육연구 Vol.12 No.1

학교안전사고는 발생해서는 안 될 사태이고, 사전에 예방할 수 있다면 가장 바람직한 선택일 것이다. 그러나 예기치 못한 학교안전사태의 발생에 대한 교사의 대처 방안 등도 사전에 고려되어야 할 주요 과제이다. 본 연구에서는 학교안전사고에 대한 특수교사와 일반교사의 인식을 알아보기 위하여 설문조사를 실시하였다. 특수교육 연수에 참여한 일반교사 180명과 특수교사 81명을 대상으로 설문조사하여 교사변인별로 학교안전사고에 대한 인식을 분석하였다. 교사가 담당하는 아동의 연령이 어릴수록 학교안전사고에 대한 교사의 불안은 높은 것으로 나타났다. 특히 정신연령이 어린 아동을 지도하는 초등특수교사의 학교안전사고에 대한 불안심리와 안전사고의 예방과 대처 방안에 대한 인식이 다른 집단에 비해 높게 고조되어 있음을 알 수 있었다. 따라서 본 연구에서는 특수학교와 특수학급을 위한 학교안전사고 예방을 위한 다면적 방안이 구축되어야 함을 또한 시사하였다. A major reason that schools exist is in order to educate with safe environments. Therefore the schools concern how to protect the school safety accidents. The purpose of this study is to compare the recognition toward school safety accidents between general and special teachers. A questionnaire with thirty four questions was developed for this study. One hundred and eighty general teachers and eighty one special teachers were participated in this study. The results of this study were that: (a) about half of the teachers experienced the school safety accidents, and they answered that the most important role to prevent the school safety accidents is to teachers themselves; and (b) elementary special teachers indicated the highest scores in necessary of school safety accidents than those of the general school teachers. Therefore this study concluded that the children's age is an important factor to feel how to school safety accidents to the teachers. Also this study suggested that special schools have to consider how to prevent the school safety accidents for the children with disabilities.

회음부의 세포성 혈관섬유종

최혜정,김성남,김규래 대한병리학회 2001 Journal of Pathology and Translational Medicine Vol.35 No.3

Er:YAG 레이저를 이용한 치아삭제 효과

최남기,양규호,박상원,김옥준 大韓小兒齒科學會 2001 대한소아치과학회지 Vol.28 No.4

Er:YAG 레이저는 파장이 물의 주흡수 정점과 일치하는 2.94㎛의 방출파장을 가지기 때문에, 물분사를 하면서 사용했을 때, 다른 레이저보다 열손상은 더 작으면서 치아경조직을 보다 효과적으로 삭제한다고 알려져 있다. Er:YAG 레이저의 상아질 삭제 효과를 평가하고자 발거된 소구치와 대구치를 대상으로 상아질 시편을 제작하고 2.94㎛의 pulsed Er:YAG 레이저 (SDL-300EN, 삼성전자, 한국)를 handpiece형의 전달계를 이용한 비접촉식 방법으로, 물에 담궈진 시간과 레이저 조사시간에 따른 삭제량과 형태를 조사, 분석하여 다음과 같은 결과를 얻었다. 1. 건전 상아질에 대한 조사 결과 물에 담군 시간이 증가할수록 삭제율이 증가 하였다. 2. 건전 상아질과 우식 상아질에 150mJ, 10Hz의 조건으로, 30초간 레이저를 조사했을 때, 우식상아질에 비해 건전 상아질에서 surface irregularity가 증가하고 상아세관이 열리는 경향이 있었으며 crack이 관찰되었다. 또한 우식 상아질에 비해 많은 탄조각(ash flecks), crack이 관찰되었고 상아세관의 불연속성(inconsistency)이 관찰 되었다. 3. 우식 상아질에서 30초로 조사한 경우에서는 dark zone이 와동에 국한되어 나타났으며 작은 fleck들이 관찰되었고, 1분간 조사한 경우에서는 30초의 경우보다도 와동이 더 넓었으며, crack이 상아세관 주행방향과 직각으로 형성된 것을 관찰 할 수 있었다. 2분간 조사한 경우는 와동이 가장 넓었으며 crack이 더 많이 형성된 것을 볼 수 있었다. The purpose of this study was to evaluate the effects of Er:YAG laser on cutting efficacy and its histologic findings. Dentin specimens of human premolars and molars were used and irradiated by Er:YAG laser with noncontact handpiece type delivery system under different treatment condition of irradiation tiem. Cavity pattern and volume were evaluated to determine the cutting efficacy and following results were obtained. 1. Cutting volume of sound dentin was getting larger with time immersed in water increase 2. With the condition of irradiation (150mJ, 10Hz, 30sec), surface irregularity was more increased in sound dentin comparing to carious dentin. For the light microscopic examination, dentinal tubules were opened and ash flecks and cracks were noted with inconsistence of dentinal tubules. 3. In case of 30 sec, irradiation in carious dentin, dark zone was limited to small focus whereas 1 min, irradiation, more wider, and cracks were noted in the perpendicular to direction of dentinal tubules. For the 2 min, irradiation, cavity was the widest and more cracks were found.