Lithographically-featured photonic microparticles of colloidal assemblies

Lee, Su Yeon,Kim, Shin-Hyun,Heo, Chul-Joon,Hwang, Hyerim,Yang, Seung-Man Royal Society of Chemistry 2010 Physical Chemistry Chemical Physics Vol.12 No.38

<P>We have described a new and promising strategy for the fabrication of composite and porous photonic crystal microparticles that combines the self-assembly of colloidal particles with photolithography techniques. We fabricated silica/SU-8 composite microparticles with photonic bandgaps <I>via</I> four steps: (1) deposition of the silica colloidal crystals on the photoresist, (2) embedding of the colloidal crystals in the photoresist, (3) UV exposure through a photomask and subsequent development, and (4) release of the microparticles from the substrate. Embedding was performed above the glass transition temperature (<I>T</I><SUB>g</SUB>) of uncrosslinked SU-8. At such temperatures, capillary forces on the silica particles facilitate the migration of colloidal crystals in the SU-8 matrix. Particle migration ceased when the top colloidal crystal layer was trapped at the interface between air and SU-8. In addition, we also prepared porous microparticles with an inverse opaline structure by dissolving the embedded silica particles from the composite structures. The porous microparticles showed enhanced reflectivity at the bandgap position due to the large refractive index contrast. The bandgap position of the microparticles was controlled by the size of the silica particles, which determined the lattice constant. Bilayered composite and porous microparticles with two distinct photonic bandgaps were also prepared by sequential deposition of colloidal crystals composed of two differently sized silica particles.</P> <P>Graphic Abstract</P><P>A new and promising fabrication strategy of photonic crystal microparticles was demonstrated by combining colloidal self-assembly with photolithography. <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=c0cp00134a'> </P>

도시공원의 연결성, 순환성 및 고립도 분석에 따른 경관생태학적 개선방안

류연수 ( Yeon Su1 Ryu ),이현택 ( Hyun Taek Lee ),나정화 ( Jung Hwa Ra ) 한국환경복원기술학회 2007 한국환경복원기술학회지 Vol.10 No.6

연령·표상양식·단어유형이 유아산문학습에 미치는 효과

황구연,최민수,정연숙 진주교육대학교 1990 論文集 Vol.34 No.1

The learning activities of young children have been frequently accomplished through the prose materials varied in the form and the structure. The probe passages mean the language activities that explain, describe, and tell about the objects and events in several sentences. It is needed the concrete materials and the method of instruction in order that young children understand the abstract and complex informations and concepts in prose. The materials of instruction for young children's prose learning involve the pictures, the actions, and the written language that are similar or identical with the prose contents. Thus it is possible to study the relations between Bruner's three repersentational modes (enactive, iconic, symbolic) and the young children's prose learning. The main purpose of this study was to present the appropriate instruction media and method in young children's prose learning by investigating the effects of the repersentational modes, the area, and the kinds of word on young children's memory of key words in prose learning. And the other purpose was to give the basic information in selecting the words for instruction throuh the comparison of nouns and adjectives. The hypotheses of this study are as follows: Hypothesis 1. The young children win recall key words differently in ages. Hypothesis 2. The young children win recall key words better in the conditions of enactive representation and iconic representation than in the condition of symbolic representation, Hypothesis 3. The five, six, seven-year-olds will recall more nouns than adjectives. Hypothesis 4. There win be the interaction effect of the ages and the representational modes. Hypothesis 5. There win be the interaction effect of the representational modes and the kinds of word. For subjects in this study, a total of 90 children who know the written language and go to the kindergarten and the elementary school in Guang-Ju, Ma-San were randomly assigned to the three experimental conditone (actions, pictures, witten languages). The experimental instruments were the actions, the 10 pictures, and the 10 cards with the written languages, and the tapes with the prose passages by the experts. Stein's(1978) "Albert Gets Caught" was used for this study as in Jung Yeon-Suk'a paper(1986). The datas were colleted by the response test consisted of ten items that were divided to 0. 1. and 2 degrees by the responses. The collected dates were analized by the repeated 3×3×2 (Ages × Rrpesentational Modes × Kinds of Word) ANOVA. The following findings were obtained: First, the hypothesis 1 was accepted [F(2, 81) = 1.09, p<,01]. The seven-year-olds (the second grades) rememberd key words better then the five-year-olds and the six-year-olds. But the differonce between the memory of the five- year-olds and that of the six-year-olds was not. Second, the hypothesis 2 was accepted [F(2, 51) = 5.56, P<.01]. Namely the significant differences among the conditions of the notions, the pictures, and the written languages were. The means of the three conditions were 6.78, 6.98, 5.92. And be the mean of the iconic repersentation mods was highest. Third, the hypothesis 3 was sccepted [F(1,81) = 39.68. P<.01]. This indicates the main effect of the kinds of word. And this mians that the kinds of word affect the prose learning of the five, six, and seven-year-olds. Forth, the hypothesis 4 was rejected. the degrees in the three representational modes were consistent in disregard of ages. Fifth, the hypothesis 5 was accepted [F(2, 81) = 3.01, P<.10]. The young children remembered relatively well key words of adjectives in the iconic representation mode.

국내외 ‘영아’ 관련 연구물의 최근 동향 분석 : 2000년~2013년 발간 논문을 대상으로

이승연,권수현,권연정,김언경,나영이,유주연,최정아 이화여자대학교 교육과학연구소 2015 교육과학연구 Vol.46 No.3

The purpose of this study was to examine research trends in infant research published from 2000 to 2013, in order to understand overall aspects in research topics, methods, and subjects in infant research and to suggest directions for future infant research. A total of 2916 journal articles and theses/dissertations, both domestic and foreign, were selected for the analysis. The findings of this study were as follows: First, for the 14 year period, 737 domestic articles, 634 domestic theses/ dissertations, 1242 foreign articles, and 303 foreign dissertations on infant research were published, and there was a steady increase in the number of articles and theses/dissertations over the years. Second, in terms of research topics, different patterns were found between the domestic ones and the foreign ones; the topic of “education and teachers” in the domestic ones and “development” in the foreign ones occurred most frequently. Third, in terms of research methods, the domestic ones employed “survey” the most, and the foreign ones employed “experiment” the most among quantitative research methods; when analyzing the relation between methods and topics, the foreign ones showed clear matches between topics and research methods, while the domestic ones preferred “survey” regardless of the topics. Fourth, in terms of subjects/participants, “infants” were the most researched in both the domestic ones and the foreign ones, followed by “parent” and “teachers.” Among the infants, the domestic ones focused on 25~36-month olds the most, while the foreign ones focused most on 0~12-month olds. In addition, in all types of infant research, there were more single subject studies than multiple subject ones.

탄소나노튜브/그래핀 기반의 1차원 나노구조체 합성 및 나트륨이온 저장특성평가

김수연, 권중인, 조중상 충북대학교 산업과학기술연구소 2018 산업과학기술연구 논문집 Vol.32 No.2

본문 참조

활동이론의 관점에서 바라본 박물관, 커뮤니케이션, 그리고 학습

박지연,이수민,이병준 한국문화교육학회 2011 문화예술교육연구 Vol.6 No.4

Museum is a medium which communicates with previous generation's experiential memories and present generation's cultural memories. Therefore, the communication is a core task in museum. Museum needs mediums like exhibition and education and we have to discuss how to structuralize these things. The museum communication could be explained through the Cultural-Historical Activity Theory(CHAT). The CHAT has been developed by several theorists like Vygotsky. Especially, the third generation's CHAT has been developing by Engeström. It is a worthy theoretical structure that can show museum as a messenger of communication in society and its communication problems. This study is based on the CHAT and analyzes museum in a social activity system and activity system in a museum from micro/macro-scopic view. Also, it produces practical models that connect museum with community art field and museum with schools. 박물관은 앞선 세대의 체험적 기억을 현 세대에게 문화적 기억의 형태로 커뮤니케이션하는 매개체이다. 따라서 박물관에서 소통(communication)이라는 개념은 핵심적인 과제일수 밖에 없다. 박물관은 그 자체로 전시와 교육과 같은 매체(medium)를 필요로 하며 이를 어떻게 구조화할 것인가의 문제가 박물관커뮤니케이션의 측면에서 논의될 필요가 있다. 이러한 거시적, 미시적 차원의 박물관커뮤니케이션의 과제는 비고츠키와 여러 이론가들의 연구성과를 정리하고 발전시킨 활동이론에 의해 잘 설명될 수 있을 것으로 보인다. 특히 Y. Engeström에 의해 발전된 제3세대 활동이론은 사회속에서의 커뮤니케이션의 전달자로서의 박물관과 박물관내에서의 커뮤니케이션의 문제를 잘 드러낼 수 있는 이론체계라고 생각된다. 본 연구는 활동이론에 근거하여 거시적·미시적 관점에서 사회활동시스템 속에서의 박물관과 박물관 내에서의 활동시스템을 분석하고 이를 통해 박물관의 커뮤니케이션을 박물관 내부 활동시스템 간의 네트워크 실천, 박물관과 지역의 예술장(藝術場)이 연계된 네트워크 실천과 박물관과 학교가 연계된 네트워크 실천 모형을 구조화하여 제시하려 한다.

미다졸람의 비강 내 추가투여가 소아의 경구 진정요법에 미치는 영향

장수영,김지연,박기태 大韓小兒齒科學會 2012 大韓小兒齒科學會誌 Vol.39 No.1

Effect of supplementary intranasal midazolam on oral sedation of children The purpose of this study was to compare the cardiopulmonary parameters of two sedation regimens during dental treatment: (1) Oral chloral hydrate(CH) and hydroxyzine(HZ) with nitrous oxide-oxygen(N2O/O2) inhalation( CH-HZ group); (2) Oral chloral hydrate(CH) and hydroxyzine(HZ) with nitrous oxide-oxygen(N2O/O2) inhalation and supplementary intranasal(IN) midazolam administration(MIDA group). Among the patients of OO hospital who received dental treatment under sedation over the past 5 years, 44 patients were selected for each group of CH-HZ and MIDA according to their age, gender and weight. Following parameters that were recorded every 5 minutes were compared: 1) Heart rate(HR) 2) O2 saturation 3) End tidal carbon dioxide concentration(EtCO2) 4) Respiratory rate(RR) 33 patients of Group MIDA who have complete data of 15 minutes before and after supplementary IN midazolam administration were selected. And measurements 15 minutes before and after midazolam administration in same patient were evaluated. The results were as follows: 1. Heart rate was significantly higher in MIDA group than in CH-HZ group, but it was within normal range. 2. Comparing HR, O2 saturation, EtCO2, RR between before and after of supplementary IN midazolam administration in the same patient, the differences were not statistically significant. 이 연구는 소아환자의 경구 진정요법 시 미다졸람의 비강 내 추가 투여가 심폐기능에 미치는 영향을 알아보기 위한 것으로 5 년간 삼성서울병원 소아치과에서 chloral hydrate와 hydroxyzine을 경구투여하고 N2O/O2 inhalation을 추가로 사용한 진정요법으로 치료 받은 환자 중 미다졸람을 추가투여 받은 실험군(MIDA군)과, 미다졸람을 추가 투여하지 않은 대조군 (CH-HZ군)을 각각 44명씩 선정하여 서로 비교하였다. 진정요법 중 5분마다 측정된 1) Heart rate(HR) 2) O2 saturation 3) End tidal carbon dioxide concentration (EtCO2), 4) Respiratory rate(RR)의 평균값을 비교하였다. 또한 동일 환자에서의 미다졸람 투여 전 후의 심폐기능지표의 변화 양상을 평가하기 위해 MIDA군 중에서 미다졸람 투여 전 후 15분 이상의 기록이 존재하는 33명을 선정하여 미다졸람 투여 전 후 15분 시점의 측정값을 각각 비교하였다. 결과는 다음과 같다. 1. Heart rate는 미다졸람을 추가 투여한 군에서 유의하게 높았으며 나머지 심폐기능 지표의 측정값들은 차이가 없었다. 두 군의 측정값들은 모두 정상범위 안에 있었다. 2. 동일 환자에서 미다졸람 투여 전 후 15분의 측정값을 비교한 결과 두 시점간에 측정된 값들은 유의한 차이가 없었다.

화학적 변성전분 및 라면 전분질의 In Vitro 소화율

김수연,이서래 이화여자대학교 생명과학연구소 1994 생명과학연구논문집 Vol.5 No.-

식품에 사용되는 화학적 변성전분류와 acetyl화 전분이 사용된 라면의 돼지 췌장 a-amylase에 의한 in vistro소화율 (37℃에서 6시간)을 비교하였다. Native potato starch와 acetylated potato starch의 가수분해율은 각각 64.5%와 59.3%, native와 hydroxypropylated corn starch는 70.5%와 60.4%, 그리고 native와 hydroxypropylated corn starch는 70.5%와 60.4% 그리고 native와 hydroxypropylated high amylose corn starch는 65.2%와 57.3%로서 native한 것들이 유도체들보다 높았다. Waxy corn starch들의 소화율은 pregelatinized(74.3%)>native(72.1%)>acetylated(66.5%)>acetyl distarch adipate(56.4%)hydroxypropyl distarch phosphate(50.7%)의 순으로 감소하였다. 국내에서 생산, 판매되고 있는 5개 회사의 봉지라면과 용기라면에 대한 실험에서는 실제 조리조건에서 소화율에 유의적 차이를 보이지 않았다. 결론적으로 화학적 변성전분의 소화율은 천연전분보다 낮지만 상용식품에서의 사용량이 매주 낮으므로 식품 섭취에 따른 전분질의 소화율에서 큰 영향을 미치지 않을 것으로 판단된다. The hydrolyzability of chemically modified starches and ramen staches was determined by hog pancreatic a-amylase in vistro test. The extents of hydrolysis were 64.5% and 59.3% in native and acetylated potato starch, 70.5% and 60.4% in native and hydroxypropylated corn starch, and 65.2% and 57.3% in native and hydroxypropylated high amylose corn starch, respectively. The hydrolysis extents of waxy corn starch derivatives were shown in the descending order of pregelatinized (74.3%)>native (72.1%)>acetylated (66.5%)>acetyl distarch adiphate (56.4%)>hydroxypropyl distarch phosphate (50.7%). In the test on starches of container and regular ramen cooked by practical way, no significant difference was observed between ramen products of five different makers. Althrough the hydrolysis rate and extent of chemically modified starches were lower than those of native starches, the digestibility of ramen seemed to be not affected in the common diet as the use level of modified starch was relatively low.

입원 환자 영양검색 전산 프로그램 개발

안수미,윤기영,신연명,최경현,임근승,장문경,송윤미,공은희 고신대학교의과대학 2008 고신대학교 의과대학 학술지 Vol.23 No.2

Background : About 30% of patients in the hospital are under nourishment. A large portion of people are undernourished when they are admitted to the hospital and in the majority of these, undernutrition develops further while in hospital. Patient-Generated subjective global assessment(PG-SGA), a method of nutritional assessment based on clinical judgment, has been widely used to assess the nutritional status of adults for both clinical and research purposes. Modified PG-SGA can be used as a nutrition screening tool, and a comprehensive nutrition assessment is desirable for those who are malnourished. The purpose of this study is to develop a simple, reliable and valid nutrition screening program(NSP). Methods : We applied the nutrition screening program(NSP) to adult inpatients who are at risk of malnutrition using the Modified Patient-Generated subjective global assessment(PG-SGA) and objective assessment(electrical medical record data). Results : Therefore simple and beneficial NSP is developed for patients with severe malnutrition. Using NSP. nutritional information of the severe malnutrition patient should be shared with the physicians and they should be taken care of by clinical dietitians to improve their nutritional status. Conclusion : The Modified PG-SGA and nutrition screening tool are simple, reliable and valid nutrition screening program(NSP).

Quilting내의의 보온성과 온냉감에 관한 연구

성수광,김연희,박명애 대구효성가톨릭대학교 응용과학연구소 1993 응용과학연구논문집 Vol.2 No.-

This study is to examine the thermal properties such as the heat keeping property and the warm/cool feeling of quilting underwear, using Thermo Labo Ⅱtype. The specimens used for this study are five kinds of quilting underwear and each one of cotton and wool underwear. The correlativity is investigated by measuring the structural properties under the standard condition(20℃, 65% RH) and the thermal properties in changing the relative humidity of 55, 65, 75, 85, 95% at 20℃. The summarized results of this studies are as follows. 1. The heat keeping rate and the qmax value of quilting underwear have a high degree of correlation with structural properties such as thickness, bulk density and porosity. As above results, the regression equation is as follows. Y_HK=1.2950X_p-85.6586X_D-3.7254X_T-37.7610(r^2=0.9566) Y_qmax=154.7298×10^-3X_D-14.3396×10^-3X_T+0.2703×10^-3X_P+0.0557(r^2=0.9707) 2. The heat keeping rate of specimens is in the order of quilting underwear > wool underwear > cotton underwear. And also, the qmax value of specimens is in the order of cotton underwear > quilting underwear > wool underwear. 3. In according to increase of the relative humidity, the heat keeping rate tends to be lower but the qmax value is to be larger. Therefore, the degree of decrease of the heat keeping rate is in the order of cotton underwear > wool underwear > quilting underwear and the degree of increase of the qmax value is in the order of cotton underwear > quilting underwear > wool underwear. And also, in the fiber content per areal weight composing quilting underwears, the degree of change of the thermal properties by changing relative humidity is remarkable when hydrophilic fiber content comes to be greater.