LSGM계 음극지지형 고체산화물 연료전지에 적용된 LDC 완충층의 효과

송은화,정태주,김혜령,손지원,김병국,이종호,이해원,Song, Eun-Hwa,Chung, Tai-Joo,Kim, Hae-Ryoung,Son, Ji-Won,Kim, Byung-Kook,Lee, Jong-Ho,Lee, Hae-Weon 한국세라믹학회 2007 한국세라믹학회지 Vol.44 No.12

LSGM$(La_{0.8}Sr_{0.2}Ga_{0.8}Mg_{0.2}O_{3-{\delta}})$ is the very promising electrolyte material for lower-temperature operation of SOFCs, especially when realized in anode-supported cells. But it is notorious for reacting with other cell components and resulting in the highly resistive reaction phases detrimental to cell performance. LDC$(La_{0.4}Ce_{0.6}O_{1.8})$, which is known to keep the interfacial stability between LSGM electrolyte and anode, was adopted in the anode-supported cell, and its effect on the interfacial reactivity and electrochemical performance of the cell was investigated. No severe interfacial reaction and corresponding resistive secondary phase was found in the cell with LDC buffer layer, and this is due to its ability to sustain the La chemical potential in LSGM. The cell exhibited the open circuit voltage of 0.64V, the maximum power density of 223 $mW/cm^2$, and the ohmic resistance of $0.17{\Omega}cm^2$ at $700^{\circ}C$. These values were much improved compared with those from the cell without any buffer layer, which implies that formation of the resistive reaction phases in LSGM and then deterioration of the cell performance is resulted mainly from the La diffusion from LSGM electrolyte to anode.

TV-CF의 모션그래픽 타이틀 디자인 활용에 관한 연구

송은화 ( Song Eun Hwa ) 한국디자인트렌드학회 2006 한국디자인포럼 Vol.13 No.-

커뮤니케이션 형태는 미디어의 발달과 디지털기술 혁신으로 변화 되였고 그 중 영상미디어는 Image의 다양화와 함께 강력한 미디어로 대중화 되였다 . 또한 커뮤니케이션 방식의 변환은 함께 짧은 시간에 전체 의미의 인지를 가능토록 하는 집약적, 함축적 우월성이 존재하게 한다. 그 중 TV는 기계의 눈과 인간의 눈이 만나 이루어낸 특수성으로 제한된 시간에 움직이는 영상의 매력을 지니고 있다. TV에 의한 CF는 오감이 총동원 된 광고표현으로 소비자에게 직접 보고, 듣고, 느끼도록 하며 다른 매체에 비해 한층 광고의 효과를 높일 수 있다는 강점이 있다. 소비자 측면에서는 새로운 상품정보, 상품개념, 그리고 새로운 생활양식으로 즉시 수용되고, 기업측면에서 CF는 회사 광고와 자사의 상품소개와 판매촉진을 위한 방안으로 활용되어 회사의 이미지 창출과 소비자에게 어필하기 위한 목적으로 CF를 활용 한다. 광고에서 표현요소로 등장되는 대부분의 이미지와 텍스트는 서로가 독자적이면서 상호 보완적 기능을 갖고 시각매체의 모든 분야에서 사용된다. 그중 타이포그래피는 문자체계가 갖고 있는 의미전달의 명확성과 기호적 성격이 강함으로 정보교환에 있어 가장 중요한 역할을 다하고, 광고 메시지의 빠른 전달과 효과적 측면에서 소비자와 소통 가능한 의미를 생산하고 전달하는 역할을 담당 하는 것이다. 효율성, 적극성을 추구는 광고에 motion 부여는 다양한 영상언어의 창출뿐만 아니라 그 활용은 시각커뮤니케이션의 최우선적 과제로 “움직임은 주의를 끄는 강력한 시지각의 대상으로 환경의 여러 조건들 속에서의 변화를 가져오며, 변화는 행동의 반응을 필요로 한다”하여 즉, 모션그래픽(Motion Graphic)이 디지털 영상에서 그래픽의 절제와 함축적인 내용 및 시간 개념을 적용함으로써 의미 전달에 큰 변화와 광고 효과의 극대화를 부여해야 한다는 것이다. 이는 시간적, 공간적인 개념 위에 복합적인 이미지 표현뿐만 아니라, 정보전달을 통한 적극적인 커뮤니케이션의 특징이라 할 수 있다 따라서 본 연구에서는 광고에 있어서 메시지의 전달과 구매자의 소구력을 높이는 커뮤니케이션과 짧은 순간 전달의도의 정확성과 신속성으로 광고의 중요한 포인트 중 하나인 타이틀의 언어적 역할은 물론이고 미적, 효율적인 타이포 역할과 디자인 의도에 부합되는 모션그래픽의 연구로 TV-CF 영상에서 효과적 커뮤니케이션 방법으로 모션그래픽의 활용효과와 가치 제시에 연구의 중점을 두고자 한다. The formation of communication has changed by the advance of media and of digital technology innovation. Among them, the image media with diversification of image became popular by powerful media. Also the transition of communication system let intensive and suggestive superiority which makes the recognition of the whole meaning be exists in a short space of time in the same breath. Above all TV has attraction of image that animating in limited time by it`s particularly which accomplished by meeting of human and machine`s eyes. CF on TV has strength on the aspect of higher effectiveness than other media and it makes customers to see, hear and feel directly by the expression of five senses. On the side view of customer, it is accepted as an information and concept of a new product and lifestyle. And on the side view of company, they are using CF on the purpose of creating their image and appeal to their customers by utilizing it as a program for publicity of an enterprise, introduction of their product and sales promotion. The most of pictures and texts in the commercial as a factor of expression have a function of original and interrelationship each other and they`re using in every fields of visual medium. Among them the typography accomplishes the most important role in exchanging information because of its definitude and strong symbolic characteristic of meaning delivery which the character system has,and it operates the charge of creating the possible sense to communicate with the consumers in the aspect of its quickness in delivering the commercial message and effectiveness. An allowance of motion to the commercial which pursuing the effectiveness and positiveness creates a diversity of image language and the practical using of this is the highest priority of task. Some says "The movement which is a powerful object of visual perception to attract one`s attention brings the change in many conditions of environment and the change needs a response to reaction.”So to speak, by application of graphic contra 1 and hidden contents and time in motion graphic, a considerable change to meaning transmission and maximization of the commercial effect must be given. Tills is not only the multiple image expression on visual and spatial concept but also the feature of positive communication by transmitting information. Therefore in this research we study the motion graphic which is corresponding to an intension of design, and efficient and aesthetic part of typo and linguistic role of title which is one of the important point with accuracy and quickness of delivery intention in a brief space of moment for the commercial as a communication to raise the consumer`s purchasing power and transmitter of message. And as this is the effective communication method of CF`s image in TV,this research will lay emphasis of the study on effect of practical using and the proposal of value.

성격에 따른 한국인 여성(20대) 캐릭터의 얼굴 모델 연구

송은화(Song Eun Hwa),최유미(Choi Yoo Mi) 한국디자인학회 2004 디자인학연구 Vol.17 No.3

동양관상을 이용한 성격에 따른 한국인 여성 캐릭터의 얼굴 모델 연구

송은화(Song Eun-Hwa),최유미(Choi Yoo-Mi) 한국디자인학회 2003 한국디자인학회 학술발표대회 논문집 Vol.- No.-

국내 대학 비대면 수업에 대한 질적메타분석

송은화 ( Song Eun-hwa ),김명찬 ( Kim Myeung-chan ) 한국교육인류학회 2021 교육인류학연구 Vol.24 No.4

본 연구의 목적은 국내대학 비대면 수업을 탐색하는 것이다. 이러한 연구 목적을 완수하기 위해 비대면 수업에 관한 질적 연구를 대상으로 질적 메타분석을 수행하였다. 질적 메타 분석은 개별 연구물에 대한 종합적 분석으로 새로운 통찰과 연구물이 제시하는 결과로부터 확장된 결론을 재해석 할 수 있는 연구방법이다. 분석대상 논문은 대학 비대면 수업을 주제로 질적 연구를 수행한 국내 학술지(KCI 등재지) 연구 논문 14편이다. 분석대상 논문의 자료코딩 및 범주, 개별 연구간 상호비교, 분석, 결과 도출, 종합적 결과 도출 및 도식화 과정을 거쳐 결과를 도출하였다. 연구결과는 3개의 주제를 바탕으로 양가감정, 환경, 태도라는 주제를 도출하였고 6가지 소주제가 도출되었다. 이러한 결과를 바탕으로 국내대학 비대면 수업에 대한 특징을 설명하고 종합적인 결과를 도출하였다. 또한, 그 의미를 논의하고 비대면 수업의 개선점을 위한 시사점과 제한점을 제시하고 후속 연구를 위해 제언하였다. The purpose of this study is to explore non-face-to-face classes in domestic universities. In order to accomplish this research purpose, a qualitative meta-analysis was performed on a qualitative study on the non-face-to-face class experience. Qualitative meta-analysis is a comprehensive analysis of individual studies, and is a research method that can reinterpret new insights and conclusions extended from the results presented by the research. The papers to be analyzed are 14 research papers from domestic academic journals (KCI-registered journals) that conducted qualitative research on the topic of non-face-to-face class experiences at universities. The results were derived through the process of data coding and categories of the thesis to be analyzed, mutual comparison between individual studies, analysis, result derivation, comprehensive result derivation, and schematization process. As a result of the study, the themes of ambivalence, environment, and attitude were derived based on three themes. Six sub-themes were also derived. Based on these results, the characteristics of non-face-to-face class experiences at domestic universities were explained and comprehensive results were derived. In addition, the meaning was discussed, implications and limitations for improvement of non-face-to-face classes were presented, and suggestions for follow-up studies were made.

초등학교 교사의 사이버가정학습 시스템 활용 실태 및 개선방안 연구

김은화(Eun-Hwa Kim),길준민(Joon-Min Gil),송의성(Ui-Sung Song) 한국정보기술학회 2010 한국정보기술학회논문지 Vol.8 No.2

The objective of this study is to survey the actual state on the utilization of cyber home learning system in elementary schools and to draw the improvement directions and plans of the system from the actual state. To do this, questionnaire research was conducted. In the questionnaire research, present teachers in elementary schools were divided into two groups: first one is a teach group which have operated cyber classes and second one is a teach group which have not operated cyber classes at all. The analysis results of questionnaire research show that first group has high affirmative answer rates than second one from a viewpoint of effectiveness, satisfaction, and usefulness factors on cyber home learning system. Moreover, the results indicates that all of two groups require a relief from work pressure, an improvement in contents quality, a connection plan of cyber home learning system with school classes.

Motion Capture 기술을 활용한 효과적인 실시간 가상캐릭터 제작에 관한 연구

송은화(Eun-Hwa Song),김치용(Chee-Yong Kim) 한국멀티미디어학회 2004 한국멀티미디어학회 학술발표논문집 Vol.2004 No.2

초등교사의 사이버학급 운영 및 인식 실태 연구

김은화(Eun Hwa Kim),송의성(Ui Sung Song) 학습자중심교과교육학회 2010 학습자중심교과교육연구 Vol.10 No.3

본 논문은 설문을 통해 초등학교 교사들의 사이버학급 운영 및 인식 실태를 파 악하고 문제점 및 개선 방안을 찾아보고자 하였다. 이를 위해 설문자료를 기반으로 교사집단을 사이버학급 운영경험이 있는 교사집단과 운영경험이 없는 교사집단으 로 나누었다. 연구 범위는 교사의 사이버학급 운영, 관심 및 인식, 연수, 개선의 영 역으로 분류하여 각 영역에 대해 두 교사집단을 비교 연구하였다. 연구 결과는 사 이버학급에 대한 관심 및 인식, 연수 영역에서 운영경험이 있는 교사집단과 운영경 험이 없는 교사집단의 인식 차가 크며 운영경험이 없는 교사집단에 대한 지원 및 향후 연구가 필요함을 보여주었다. 또한, 두 집단 모두 사이버학급 운영 활성화를 위해서는 업무증가에 대한 부담감 해소와 운영 능력 향상을 위한 다양한 형태의 연수 지원이 필요함을 보여주었다. The objective of this study is to survey the actual state on the management and recognition for cyber class of elementary school teachers and to derive the problems and improvement directions from the actual state. Based on questionnaire research, present teachers in elementary schools were divided into two groups: first one is a teacher group which have operated cyber classes and second one is a teacher group which have not operated cyber classes at all. They were investigated on a viewpoint of management, interest, recognition, training, and the plan of revitalization on cyber class. The analysis results of questionnaire research show that there are big recognition differences from a viewpoint of interest, recognition, and training areas on cyber class in the two groups and second group needs appropriate support and future research. Moreover, the results indicates that all of two groups require a relief from work pressure and an offer of various training methods for improving cyber class management power.

LSGM계 전해질 지지형 고체산화물 연료전지의 특성평가

송은화,김광년,정태주,손지원,김주선,이해원,김병국,이종호,Song, Eun-Hwa,Kim, Kwang-Nyeon,Chung, Tai-Joo,Son, Ji-Won,Kim, Joo-Sun,Lee, Hae-Weon,Kim, Byung-Kook,Lee, Jong-Ho 한국세라믹학회 2006 한국세라믹학회지 Vol.43 No.5

LSGM(($La_xSr_{1-x})(Ga_yMg_{1-y})O_3$) electrolyte is known to show very serious interfacial reaction with other unit cell components, especially with an anode. Such an interfacial reaction induced the phase instability of constituent component and deterioration of the unit cell performance, which become the most challenging issues in LSGM-based SOFCs. In this study, we fabricated LSGM($La_{0.8}Sr_{0.2}Ga_{0.83}Mg_{0.17}O_x$) electrolyte supported-type cell in order to avoid such interfacial problem by lowering the heat-treatment temperature of the electrode fabrication. According to the microstructural and phase analysis, there was no serious interfacial reaction at both electrolyte/anode and electrolyte/cathode interfaces. Moreover, from the electrochemical characterization of the unit cell performance, there was no distinct deterioration of the open cell voltage as well as an internal cell resistance. These results demonstrate the most critical point to be concerned in LSGM-based SOFC is either to find a proper electrode material which will not give any interfacial reaction with LSGM electrolyte or to properly adjust the processing variables for unit cell fabrication, to reduce the interfacial reaction.

Numerical Simulation of the Odor Spreading in a Factory

Lijo Vincent,Eun-Hwa Song(송은화),Hyun-Kyu Nam(남현규),Choon-Sik Shin(신춘식),Heuy-Dong Kim(김희동) 대한기계학회 2008 대한기계학회 춘추학술대회 Vol.2008 No.11

Liquid crystal displays (LCD's) are continuously coated with some chemicals in the clean room of a factory. Spreading of these chemicals is causing serious problems both in controlling clean room quality as well as to the workers inside the factory. It is required to alleviate or properly control the offensive odor which is mainly composed of propylene glycol mono ethyl acetate, novolak resin and photo active compound. The control strategy employed is to bleed the offensive odor gas out the clean room. A full scale 3D CFD model was created with anisotropic porous media, chemical species transport with no volumetric reaction, and thermal diffusion with propane gas (tracer gas) to simulate the odor spreading. A segregated implicit solver with standard k-ε model is employed. The detailed CFD analysis made it possible to develop an effective method of ventilating the coater room and optimizing their capacities.