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>

최형섭과 ‘한국형 발전 모델’의 기원

임재윤(Jae Yoon Im),최형섭(Hyungsub Choi) 역사비평사 2017 역사비평 Vol.- No.118

This article critically reviews the “model” of Korean development designed by Choi Hyung Sup, Minister of Science and Technology of the Park Chung Hee government. The model has been an active template in Korea’s official development assistance (ODA) of science and technology. This acknowledgement comes from the belief that the model was effective in the development of Korea, and it attained widespread support from senior scientists and administrators of science in Korea. In this paper the authors highlight the fact that the model was from the beginning designed to be applicable in other countries. The argument is that the model was formulated within the context of Cold War development studies supported by international organizations. Through the process, Choi’s model acquired its characteristics of emphasizing legal and institutional set-ups, the role of national leaders and the national laboratories in introducing, digesting, and improving high technology.

노인의 영적 간호요구

최미혜,김경희,김귀옥,김기숙,김수강,김정신,김춘숙,노흥진,박지연,성혜연,오명선,이선희,이원옥,이윤영,이현수,장명재,차혜경,채정선,홍상희 중앙대학교 의과대학 간호학과 간호과학연구소 2001 중앙간호논문집 Vol.5 No.1

This study was designed to exam the aged's needs for spiritual nursing care. The purpose was to serve as a basis for the development of spiritual nursing practice. The major findings are as follows : 1. The degree of needs for spiritual nursing care as area was that needs of love and relationship mean 22.0, needs of meaning and object mean 28.2, needs of forgiving mean 13.5. Total needs for spiritual nursing care mean 63.7, which was on the upper middle level. The needs of meaning and object was rated highest. 2. Among the general characteristics of the subjects, needs of love and relatiohship wasn't significanlty different. 3. Among the general characteristics of the subjects, needs of meaning and object was significantly different according to two factors : age(F=7.260, p=0.001), religion(F=5.275, p=0.001). Higher needs of meaning and object was possessed by the older than the younger, by the one who have religion than the other. 4. Among the general characteristics of the subjects, four factors made a significantly difference to needs of forgiving : sex(t=-2.851, p=0.006), age(F=8.201, p=0.001), religion(F=6.928, p=0.000), disease(t=2.327, p=0.024). Higher needs of forgiving was possessed by man than woman, by the older than the younger, by the one who have religion than the other, by the one who have disease than the other.

클랩(Clap)과 노말(Normal) 스케이트 착용에 따른 남ㆍ여 스피드 스케이트 출발 구간의 운동학적 분석

윤희중,나윤수,최재용,김태삼 한국체육대학교 체육과학연구소 2000 韓國體育大學校附屬 體育科學硏究所論文集 Vol.19 No.1

The purpose of this study is to examine the kinematic characteristics of starting phase of players weared clap and normal skate in speed skating. The subjects of this study were current members of high ranked skaters in university. The Direct Linear Transformation(DLT) technique was employed to obtain 3-D position coordination of 22 joint points. Butter-worth low-pass filtering method was used to data smoothing at cut-off frequency of 7.4Hz. From the results of this study, the following conclusions were drawn; 1.At the of landing, male athlete showed slightly fast time in the first left-step and they also showed take-off by fast swing motion during gliding. 2.To get propel acceleration, female athlete showed large tranverse displacement and, on the other hand, male athlete showed large horizontal displacement. According to this results, COG showed steep change of motion in the high position during starting. 3.In the velocity of COG, both male an female athlete show a gradual rise-pattern of the velocity rate, In the velocity of skate front blade, they showed the swift change of the velocity during the second and third phase. 4.In the front angle of trunk, both and female athlete showed the big motion of trunk by the change of angle. In the angle of lower-segments, the better record athlete have, the faster motion of flexion and extention. Especially, female athlete showed the flexion of the angle-change and do not fast swing. In the knee, male athlete show take-off motion as increasing angle of left knee during starting, On the other hand, female athlete showed unnecessary pre-motion by decreasing knee angle and increasing it again.

자연형 하천공법 적용 후의 오산천 상류구간의 수질변화 조사

최이송,박재영,윤세철,오종민 慶熙大學校 地球環境硏究所 2002 지구환경논문집 Vol.13 No.-

Recently, Korea is concentrating his concern to restoration of stream because its water quality has been deteriorated by various pollutants generated through urbanization and industrialization. As a test section, upstream section(3.1㎞) of Osan Stream which has the characteristics of the typical small urban stream was restored with natural form by various construction methods. This study was performed to understand the variation of water quality for the section after restored to natural form and to estimate improvement effectiveness of water quality by it through comparison of water quality before and after constructed. Based on the results, it was estimated that, even though inflow of tributaries, water quality was improved at the section of OS1 and OS3 and this was influenced by self-purification increased. Through the comparison with the datum of 1996, we could know that water quality after construction was greatly improved. Therefore naturalization form of Osan Stream contributed to purification of water quality and to restore stream with natural form was estimated as a desirable method for improvement of stream water quality.

감압밸브를 포함한 송수관로의 수격압 방지설계

윤재흥,최두용 대한상하수도학회 2003 상하수도학회지 Vol.17 No.3

This study proposes procedures of water transient analysis and methods of designing pressure relief valves and surge pipes in the complex water transmission system which includes many branches, reservoirs and pressure reducing valves. Since those kinds of analysis and procedures have not been studied until now, the proposed methods and procedures will be a basis for making the transient analysis of similar systems efficient. The cases that are considered in the analysis are sudden closure of pressure reducing valves and slow closure of reservoir flow control valves. In the latter case, the pressure reducing valves can keep fully open or can react on the downstream pressures of the valves.

十全大補湯이 癌轉移 抑制에 미치는 影響

윤재호,최승훈,안규석 대한한방종양학회 1998 대한한방종양학회지 Vol.4 No.1

To examine the effect of Shiquandabutang on the metastasis of cancer, the following experiments were made. Before the main experiments, the cytotoxieity was measured by putting Shiquandabutang sample in HT1080, Then zymography was made to examine the change of gelatinolytic activity. And western blotting was carried out to examine the changes of Fos, Jun, Ets, the transcription factors of MMP-2. MMP-9, and Erk. JNK on signal transduction pathway to AP-1, Third, in vitro invasion assay with tranwells coated by collagen and matrigel was carried out. From the results of the above the following conclusions were obtained. 1. The experimental result about cytotoxicity of Shiquandabutang against HT1080 was as below. The stained cell count after being treated by Shiquandabutang sample 400ug/ml for 24 hours was 0.9% of total cells. and the stained cell count by Shiquandabutang sample 100ug/ml was 1.5% of total cells. Both were near the level ot control groupwhich showed 0.6% stained. 2. The restlt of collagenase assay was as bclow. In shiquandanbutang sample 400ug/ml, MMP-2 was reduced as compared with TPA control group. and the band of MMP-9 induced by TPA disappeared. In Shiquandabutang sample 800ug/ml. both bands of MMP-2 and MMP-9 disappeared. 3. The reasults of western blots for Jun, Fos, Ets, Erk, JNK were as below. In Shiwaandabutang sample 200ug/ml, Ets was reduced, and Jun, Fos were increased. 4. The result of invasion assay was as below. The number of cells which migrated across transwell membrane in shiquandabutang-lteated group was less than that of +TPA control group. From the above results, it was concluded that Shiquandabutang might control the appearting and acting of collagenase not by the MMP-2, -9 promoter but by other way.

농부가 아닌 환자에서 발생한 긴털가루진드기(Tyrophagus Putrescentiae)에 의한 기관지천식 1례

최대로,김형수,고창옥,김희선,윤호성,박용범,김상훈,이재영 대한천식 및 알레르기학회 2004 천식 및 알레르기 Vol.24 No.1

Storage mites are believed one of the most important allergens in farmers and rural regions. Tyrophagus putrescenitiae, belonging to storage mites, is found not only within storehouses but also in the house dust, and the third most common mites following Dematophagoides farinae and Dermatophagoides pteronyssnus in house dust in Korea. The sensitization rate to Trophagus putrescentiae was reported as high as that of house dust mite in patients visiting the allergy clinic in large cities in Korea. We experienced a 69-year-old man who had suffered from dyspnea, wheezing, and coughing for 10 years. He retired from the teaching profession, and had lived in a large city. Deajeon. The skin prick test showed a positive reaction to Tyrophagus putrescentiae and negative reactions to house dust mites. The bronchial challenge test with Tyrophagus putrescentiae showed late asthmatic reaction. We confirmed a Tyrophagus putrescentiae induced asthma in non occupational setting. (J Asthma Allergy Clin Immunol 24 : 141-5, 2004)

쥐의 성주기에 따른 자궁 비만세포와 성호르몬의 변화

최영자,제갈승주,윤영승,김재만 木浦大學校 基礎科學硏究所 2001 基礎科學硏究誌 Vol.19 No.-

Mast cells reside in connective tissue and mucous tissue that encircle the internal environment of the body, where they mediate inflammatory response encountering foreign materials. Mast cells are also found in uterus tissue which is, in fact, exposed to external world. Because the cells are provoked by invading foreign cells to cause inflammatory response, their response in the uterus should be controled for success in fertilization and implantation, in that the foreign sperms and fertilized egg are willing to invade into the body. In order to confirm such assumption, we investigated the changes in mast cell numbers and their contents in the rat uterus during the estrus cycle and related these to the changes in sex-hormone concentration. The mean number of mast cell at the proestrus and estrus phase was 4.8±2.72 and 5.98±1.55. respectively. The number increased as much as 3 times more then previous phase at the metestrus phase and subsided to half at following the diestrus phase. Those mast cells were subdivided type. Connective tissue type was major at metestrus and diestrus phase. At the following proestrus, however, the muscous type was largely increased and major population was changed to muscous and intermediate type at estrus phase. In the immature uterus of young female, as few as 1.67±0.23 cells were detected and most of them were mucous and intermediate type. The concentration of circulating estradiol-17 β was lowest at the metestrus phase both in free and bound form. The results suggest that estrogen may be involved in inhibiting swarming of mast cells in the uterus and accumulating the contents of secretory vesicles.

美術敎授行爲에 있어서 視知覺 理論의 意義

최윤재 韓國美術敎科敎育學會 2001 師鄕美術敎育論叢 Vol.8 No.-

The purpose of this study is to review Implication of Theory of Visual Thinking in Art Education If visual perception as cognition is involved in the arts, art education will give students cognitive works as well as emotional and creative experiences. This study not only have to do with senses, perception and thinking, but their relationships. Vision is the teaching of aesthetic perception. It is involved in aesthetic thought. It is necessary to make students observe aesthetics object, in particular, the work of art. arts are the resource of visual thinking. Arts have cognitive one as well as emotional creative ingredient. In these respects, it is imperative that this study investigates visual perceptual thinking-based on art education. Therefore it is of importance to note that since visual-perception works form the world to human thinking, visual thinking through arts is on the basis of artistic experience. Accordingly the formation of the conception based on simple knowledge and indication cannot achieve perceiving through the experience. It is not a visual perception. Artistic perception is required to experience the qualities of the artistic objects. It is concluded that visual perception with the extension of thinking should be an essential element of the development of art education.