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>

해양공간 정책시뮬레이션 기술 개발 - 현황 및 도전과제

조성진(Sung-Jin Cho),강전영(Jeon-Young Kang),박재영(Jaeyoung Park),최희정(Hee-Jung Choi),남정호(Jungho Nam) 한국해양환경·에너지학회 2021 한국해양환경·에너지학회 학술대회논문집 Vol.2021 No.5

“실제로 존재하지 않는 대상을 존재하는 것처럼 만들어 놓은 인공물"을 뜻하는 라틴어 '시뮬라크르(simulacre)'에서 파생된 시뮬레이션(simulation)은, 복잡한 문제를 해석하기 위해서 실제와 비슷한 상태(시스템)를 모델로서 구현하고, 반복 연산을 통해 최적해를 찾는 과정을 뜻한다(Baudrillard, 1994). 전통적인 분석적 방법론(analytical method)은 계수 추정을 통해서 특정 시점의 두 변수, 즉 독립변수와 종속변수의 상관성을 규명하는데 반해, 시뮬레이션 방법론(simulation method)은 현상의 재현을 통해서 과정을 파악하는데 목적을 둔다. 이러한 특징으로 말미암아 시뮬레이션 기법은 문제의 최적해보다 현상의 규명에 더 적합한 방법론이다. 자연계 (nature system)의 문제(가령, 산사태의 발생원인)는 요인들 간 단순하고 명확한 관계에 의해서 정의되지만, 인간계(human system)의 문제(가령, 부동산 가격상승의 원인)는 비교적 복잡하고 불명확한 관계에 의해서 규정된다. 따라서 주로 인간관계에서 비롯되는 사회 문제를 해결하기 위한 수단으로써 정책은 시뮬레이션 기술을 적용하기에 적합한 대상이다. 일반적으로 정책은 결과 못지않게 과정도 중요하며(당위성), 현재·미래 문제를 포괄하고, 긍정적·부정적 효과(양면성)를 함께 고려하므로, 시뮬레이션은 이러한 요건에 잘 부합하는 기술이다. 최근 노인복지(백의현, 2019), 미세먼지(심창섭, 2019), 주택시장(최명섭&변세일, 2016), 인구센서스(배장현 외, 2016) 등 다양한 정책분야에서 시뮬레이션 기술이 활용되고 있다. 2019년에 재정된 “해양공간계획 및 관리에 관한 법률”에 근거한 해양공간기본·관리계획, 해양용도구역, 해양공간적합성협의 등은 해양자원의 효율적 이용과 해양공간의 갈등 및 상충을 해소하기 위한 해양수산 분야의 新정책수단이다. 최근 해양관광, 골재채취, 해상풍력, 해상경계분쟁 등 사회적 이용 및 갈등이 심화되면서 실효성 있는 해양공간정책의 요구가 높아지고 있는 실정으로, 해양정책을 정확하게 평가하고 지원할 수 있는 과학적 도구가 절실하다. 해양공간은 환경·생태계, 지역사회, 수산업, 관광업, 에너지개발 등 복잡한 이해관계가 얽혀 있으며, 정책평가 시 이러한 관계를 명확하게 정의하고 고려해야 한다. 본 연구는 해양공간정책 지원도구로써 해양정책시뮬레이터(Ocean Policy Simulator, OPSim)를 제안하며, 대표적인 복잡계 연구방법론으로서 거시적 현상을 미시적 행위자의 상호작용으로 설명하기 위해 제안된 행위자기반모형(Agent-Based Model, ABM)을 적용하고자 한다. ABM은 정책 대상 및 환경의 동적 변화와 더불어, 자연·인문 환경과의 상호작용(상충 또는 시너지)이 활발한 해양 분야에 적합한 방법이지만, 동시에 시뮬레이션 결과에 대한 검증의 어려움과 모델 인자의 초기값에 대한 의존성 등 한계점을 내포하고 있다. 따라서 ABM을 적용한 OPSim 개발 과정에서 빅 데이터를 활용한 AI기술, 자가진화 시뮬레이션 기법(self-evolving simulation), 시스템다이나믹스(system dynamics) 등을 활용하여 한계점을 보완할 수 있다(Scheutz et al., 2016; Kang et al., 2016; Bae et al., 2018; Kavak et al., 2018). Simulation derived from the Latin word "simulacre" for "artificial objects that actually do not exist" means the process of modeling a realistic state (system) to interpret complex problems and finding an optimal solution through repeated operations (Baudrillard, 1994). While a traditional analytical method defines the correlation of two variables (i.e., independent variables and dependent variables) through coefficient estimation, a simulation method aims to identify the process through the reproduction of phenomena. Therefore, a simulation technique is a more suitable methodology for identifying phenomena rather than finding an optimal solution. The problem of the natural system (e.g. landslides) is defined by simple and clear relationships between factors, but that of the human system (e.g. real estate prices) is defined by relatively complex and unclear relationships. Therefore, a policy as a means of solving social problems, primarily derived from human relationships, is suitable for applying a simulation technique. Simulation is a technology that meets these requirements well, as a policy addresses the procedure as important as the result, solving current and future problems, and considering both positive and negative effects. Recently, simulation technology has been used in various policy areas such as welfare for senior citizens (Baek, 2019), fine dust (Shim, 2019), housing market (Choi&Byun, 2016), and population census (Bae et al, 2016). Marine space policies based on the Marine Space Planning and Management Act, which was enacted in 2019, such as marine spatial basic and management plans, marine use zones, and marine space suitability consultations are new political tools for efficient use of marine resources and management of conflicts. As social use and conflicts such as maritime tourism, aggregate collection, off-shore wind power, and maritime border disputes have intensified recently, calls for effective marine spatial policies are increasing, and scientific tools are urgently needed to accurately evaluate marine policies. Since marine space is intertwined with complex interests such as the environment, ecosystem, community, fisheries, tourism, and energy development, a marine spatial policy support tool should define and consider these relationships for policy evaluation. This paper proposes Ocean Policy Simulator (OPSim) as a support tool for marine spatial policy. Specifically, we aim to highlight the usefulness of an agent-based model (ABM) to explore human-nature interactions (i.e., conflict or synergy) and to provide policy implications. Using an ABM for such purposes often meet the issues in regard to verification and validation of the model’s structures and outcomes. However, AI technology using spatiotemporal bigdata, self-evolution simulation techniques, and system dynamics can help to tackle validation and verification procedures in the development process of OPSim using ABM (Scheutz et al., 2016; Kang et al., 2016; Bae et al., 2018; Kavak et al., 2018).

아동청소년 교우관계문제검사의 요인구조

최선희,김종미,홍상황,Choi, Sun-Hee,Kim, Jong-Mee,Hong, Sang-Hwang 한국초등상담교육학회 2011 초등상담연구 Vol.10 No.2

본 연구는 아동청소년 교우관계문제검사(KIPR)에 잠재되어 있는 요인구조를 밝히고 검증하여 이 검사의 심리적 특성을 밝히고 해석적 유용성을 높이는데 목적이 있다. 이를 위해 경남지역 3개 초등학교 4~6학년 아동 616명을 대상으로 아동청소년 교우관계문제검사를 실시하였고 그 중 578명의 자료를 분석하였다. 연구결과를 요약하면 다음과 같다. 첫째, 3요인과 4요인 모형을 설정하여 탐색적 요인분석을 실시한 결과 3요인 모형이 적합한 것으로 나타났다. 3요인 모형에서 요인 1은 아동청소년 교우관계문제검사의 비주장성(C5), 사회적 억제(C4), 냉담(C3), 과순응성(C6) 원형척도의 문항들로 구성되어 있어서 "자신감 결여와 사회적 위축", 요인 2는 통제지배(C1), 자기중심성(C2) 원형척도의 문항들로 구성되어 있어서 "공격성과 타인조종", 요인 3은 자기희생(C7), 과관여(C8), 과순응성(C6) 원형척도의 문항들로 구성되어 있어서 "과잉배려"로 명명하였다. 둘째, 확인적 요인분석을 실시한 결과 3요인 모형은 4요인 모형보다 수집된 자료를 잘 반영하고 있었고(RMSEA=.054), 적합도는 만족할 수준은 아니지만 수용할 수 있는 수준이었고(CFI=.786), 모형의 간명성 또한 적합한 것으로 나타났다(PCFI=.733). 본 연구에서는 교우관계원형에서 상관계수가 높은 인접한 척도끼리는 동일한 요인으로 묶여지는 것을 확인하였고 이를 통해 8개의 원형척도를 망라하는 상위의 대표적인 요인척도를 구성하는데 필요한 근거를 제공하여, 이 검사의 해석적 유용성을 높였다는 점에서 의의가 있다고 생각된다. The purpose of this study is to reveal and confirm the factor structure inherent in the Korean inventory of peer relationships(KIPR; Sang-Hwang Hong, et al., 2009) in order to strengthen the interpretive usefulness of the test. For this purpose, the inventory was administered to the total of 616 children in the fourth through sixth grades in three elementary schools located in Gyungnam area, and the data from 578 of them were analyzed. The results of the study can be summarized as follows. First, as a result of the exploratory factor analysis of 3-factor and 4-factor models, the 3-factor model was found to be more appropriate. In the 3-factor model, the factor 1 is named "Lack of Self-Confidence and Social Withdrawal" as it consists of such circumplex scale items as Non-Assertiveness (C5), Social Avoidance (C4), the Cold (C3), and Too Submissive (C6). The factor 2 is named "Too Aggressive and Controlling" and consists of items Too Controlling (C1) and Hard to be Supportive (C2). The factor 3 is named "Too Caring" and consists of items Too Responsible (C7), Over Involvement (C8), and Too Submissive (C6). Second, as a result of the confirmatory factor analysis, the 3-factor model, in comparison to the 4-factor model, was found to better reflect the collected data(RMSEA=.054), its goodness of fit was not satisfactory but within the acceptable range(CFI=.786), and its power of simplicity and clarity was also adequate(PCFI=.733). In the current study, through the exploratory and confirmatory factor analyses of scores from the Korean inventory of peer relationships circumplex scales, scales within the peer relationship circumplex model that are near each other and are highly correlated were confirmed to be grouped together as same factors. I believe the main merit of the study lies in the above result having provided the necessary foundation for forming the superordinate and representative scale that encompasses the eight circumplex scales, which enhances the test's interpretive usefulness.

입제의 수면처리에 의한 주요수도해충의 동시방제

최승윤,배상희,송유한,Choi Seung Yoon,Bae Sang Hee,Song Yoo Han 한국응용곤충학회 1970 한국식물보호학회지 Vol.9 No.1

본 시험은 유기인계 살충제인 Terracur P입제 및 Lebaycid 입제와 유기염소계 살충제인 상감마입제$(\gamma-BHC 입제)$를 수면시용 하였을때 수도요해충인 이화명충, 끝 동매미충, 애멸구 및 흰둥멸구에 대한 동시방제가능성과 방제적기를 구명하고 약제간의 방제효과를 비교코저 실시하였다. 얻어진 시험결과는 다음과 같다. 1) 약제처리후 부화직후 이화명충 접종 시험에 있어서 상감마와 Terracur P는 높은 살충율을 보였으나 Lebaycid의 살충율은 낮았다. 約 $50\%$ 살충력 잔효일수에 있어서 상감마는 8-14日이었고 Terracur P는 6일간이었다. 2) 당초 계획된 방제적기에 관한 정보는 얻을 수 없었다. 즉 주어진 일간격이 좁아 유의한 차를 얻을 수 없었다. 3) 1,2화기 이화명충에 대한 방제효과는 Terracur P=상감마>Lebaycid의 순이었다. 4) Terracur P와 Lebaycid 입제의 처리는 끝동매미충의 방제효과가 좋았으나 상감마$(\gamma-BHC 입제)$의 방제효과는 기대할 수 없었다. 끝동매미충에 대한 Terracur P와 Lebaycid입제의 잔효력은 30일 이상이었다. 5) 애멸구와 흰등별구에 대한 시험은 충의 서식밀도가 낮기 때문에 약제간 방제효과를 얻을 수 없었다. 6) 공시약제중 Terracur P와 Lebaycidd입제는 이화명충과 끌동매미충의 동시방제제로서 사용할 수 있을 것 같다. This experiment was conducted to find out the simultaneous control effect of granulated insecticides on the several major rice insect pests in Korea. The granulated insecticides used were Terracur P$5\%$ (one of the phosphoric insecticides), Lebaycid $5\%$, and Sang-gamma (gamma-BHC) $6\%$. Those insecticides were broadcasted by hand on the paddy field at the ratio of 3kg. in June and 4kg. in August per 10 a, and the date of insecticidal application was based on the maximum moth occurrence of the rice stem borer in 1969. The rice insect pests tested in this study were rice stem borer (Chilo suppressalis W.), green rice leafhopper (Nephotettix bipunctatus cincticeps U.), smiller brown planthopper (Laodelphax striatellus F.), and white back planthopper (Sogotella furcifera H.). For the study of residual effectiveness of the insecticides, the rice stem borer larvae just hatched from the eggs were installed on the sheath of rice plants collected from the paddy field after insecticidal treatment, and the mortality was made at 48 hours after installation. High mortality was observed in Terracur P and Sang-gamma treatments and low mortality in Lebaycid treatment. The duration of residual effects giving about 50% mortality was about 14 days in Sang-gamma and about 6 days in Terracur P treatments. The study on the effectiveness of the insecticides to the rice stem borer in the paddy field was made by the number of dead blades and white heads of the rice plants injured by the larvae, and the number of survival larvae in the straws after crop harvest. The order of insecticidal effectiveness to the rice stem borer was Terracur P=Sang-gamm>Lebaycid. The study on the effectiveness of the insecticides to the leafhoppers and planthoppers in the paddy field was made by the population density by sweeping (5 times) at the given day intervals after treatments. Terracur P was highly effective for the control of the green rice leafhoppers and Lebaycid was moderately effective, but Sang-gamma seemed not to be effective. The effectiveness of the insecticides tested to the planthoppers was not clear, and it seemed to related with the low insect population density. Study on the determination of proper timing of insecticidal application was not also made clear, and it seemed to be short in the range of day intervals in the insecticidal application. For the study on the control effects of the rice insect pests, rice yield per 100 hills per plot was observed. There was no statistically significant difference among the treatments in rice yields, but the order of yield (Terracur P>Sang-gamma>Lebaycid>Control) was paralleled with the tends of control effects above mentioned. In a view point of simultaneous control of the rice stem borers and green rice leafhoppers by the application of granulated insecticides, Terracur P and Lebaycid were more effective than Sang-gamma which have been used.

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.

GA 도포제와 염화칼슘 처리시기가 ‘신고’ 과실의 성숙 및 저장성에 미치는 영향

윤철구(Cheol Ku Youn),김선규(Seon Kyu Kim),임상철(Sang Cheol Lim),김학현(Hag Hyon Kim),김영호(Young Ho Kim),이철희(Cheol Hee1 Lee),최관순(Kwan Soon Choi) 한국원예학회 2000 원예과학기술지 Vol.18 No.2

MicroRNA expression profile of gastrointestinal stromal tumors is distinguished by 14q loss and anatomic site

Choi, Hee-Jung,Lee, Hanna,Kim, Hyunki,Kwon, Ji Eun,Kang, Hyun Ju,You, Kwon Tae,Rhee, Hwanseok,Noh, Sung Hoon,Paik, Young-Ki,Hyung, Woo Jin,Kim, Hoguen Wiley Subscription Services, Inc., A Wiley Company 2010 International journal of cancer: Journal internati Vol.126 No.7

<P>MicroRNAs are known to regulate gene expression. Although unique microRNA expression profiles have been reported in several tumors, little is known about microRNA expression profiles in GISTs. To evaluate the relationship between microRNA expression and clinicopathologic findings of GISTs, we analyzed the microRNA expression profiles of GISTs. We used fresh frozen tissues from 20 GISTs and analyzed KIT and PDGFRA mutations and chromosomal loss status. MicroRNA expression was analyzed using a microRNA chip containing 470 microRNAs. Using unsupervised hierarchical clustering analysis, we found four distinct microRNA expression patterns in our 20 GISTs. Six GISTs that did not have 14q loss formed a separate cluster. In the 14 GISTs with 14q loss, 5 small bowel GISTs formed a separate cluster and the remaining 9 GISTs could be divided into two groups according to frequent chromosomal losses and tumor risk. We found 73 microRNAs that were significantly down-regulated in the GISTs with 14q loss; 38 of these microRNAs are encoded on 14q. We also found many microRNAs that were down-regulated in small bowel and high-risk group GISTs. Most of the microRNAs down-regulated in the high-risk group and small bowel GISTs are known to be involved in tumor progression, specifically by stimulating mitogen-activated protein kinase (MAPK) and the cell cycle. The microRNA expression patterns of GISTs are closely related to the status of 14q loss, anatomic site, and tumor risk. These findings suggest that microRNA expression patterns can differentiate several subsets of GISTs.</P>

Application of Fault Location Method to Improve Protect-ability for Distributed Generations

Sung-Il Jang,Duck-Su Lee,Jung-Hwan Choi,Yong-Cheol Kang,Sang-Hee Kang,Kwang-Ho Kim,Yong-Up Park 대한전기학회 2006 Journal of Electrical Engineering & Technology Vol.1 No.2

This paper proposes novel protection schemes for grid-connected distributed generation (DG) units using the fault location algorithm. The grid-connected DG would be influenced by abnormal distribution line conditions. Identification of the fault location for the distribution lines at the relaying point of DG helps solve the problems of the protection relays for DG. The proposed scheme first identifies fault locations using currents and voltages measured at DG and source impedance of distribution networks. Then the actual faulted feeder is identified, applying time-current characteristic curves (TCC) of overcurrent relay (OCR). The method considering the fault location and TCC of OCR might improve the performance of the conventional relays for DG. Test results show that the method prevents the superfluous operations of protection devices by discriminating the faulted feeder, whether it is a distribution line where DG is integrated or out of the line emanated from the substation to which the DGs are connected.

Aging and Cancer : p19ras represses the enzymatic activity of NSE(Neuron Specific Enolase) through their protein-protein interaction

( Sang Min Jang ),( Jung Woong Kim ),( Ki Hyun Song ),( Kyung Hee Choi ) 한국생화학분자생물학회 (구 한국생화학회) 2008 생화학분자생물학회 춘계학술발표논문집 Vol.2008 No.-

A Biologic Study On Toothash-Plaster Of Paris Mixture With Absorbable Collagen Membrane In The Treatment Of Peri-Implant Defects

( Hee Yeon Choi ),( Hak Kyun Kim ),( Su Gwan Kim ),( Seong Yong Moon ),( Sang Yeol Kim ),( Kwang Bum Park ),( Young Min Kim ),( Seong Chul Lim ),( Eun Seok Kim ),( Jeong Hoon Lee ) 대한악안면성형재건외과학회 2008 Maxillofacial Plastic Reconstructive Surgery Vol.30 No.2S