온실가스 기반 합성가스 생산을 위한 DRM 연구

김지현(Jihyeon Kim),김효식(Hyo Sik Kim),김진호(Jin-Ho Kim),김현지(Hyun-Ji Kim),류재홍(Jae-Hong Ryu),강석환(Suk-Hwan Kang) 한국에너지기후변화학회 2022 한국에너지기후변화학회 학술대회 Vol.2022 No.5

청주지역 남자중학생의 교복 착용 및 세탁관리 실태 조사: 코로나 19 발생 전후 비교를 중심으로

김지현(Jihyeon Kim) 충북대학교 생활과학연구소 2023 생활과학연구논총 Vol.27 No.1

Background/Objectives: Following the outbreak of COVID-19, the number of school days for students decreased, accompanied by online classes were at home, and there were many changes in students' clothing. This study investigates the actual condition of wearing school uniforms based on item and dissatisfaction factors for male middle school boys who a period of rapid growth and a pandemic, and suggests a direction for improvement. It how school uniforms are washed at home, compares the differences with the suggested care label's laundry management method, and offers a reasonable laundry management technique. Methods: This study surveyed 200 middle school boys in the Cheongju area before and after the outbreak of COVID-19, and examined how the wearing of school uniforms and laundry management at home changed. Results: The items with changes in wearing frequency before and after the COVID-19 outbreak were pants, shirt, vest uniform, and comfortable uniform. As for the dissatisfaction factors by item, “activity” was the biggest dissatisfaction factor for jacket, pants, and shirt;, “fabric” for vest;, and “design” for gym uniform and comfortable uniform. The major difference between the method of washing school uniforms at home and that suggested on the care label was whether to use a washing machine or dryer. Regarding the washing method recommended on the care label, there were no school uniform items that could be washed in a dryer, but pants, gym uniform, and comfortable uniform could be washed in a washing machine. Conclusion/Implications: In this study, the proportion of using a washing machine and dryer for all items was not small. This study is expected to identify the school uniform needs of middle school boys who experienced the COVID-19 era for more than a year and to contribute to the basic data for design, material, and pattern development for wearer-centered school uniform production.

연료유의 연소특성 파악을 위한 열중량 분석 결과 비교

김지현(Jihyeon Kim),김효식(Hyo-Sik Kim),김진호(Jin-Ho Kim),류재홍(Jae-Hong Ryu) 한국에너지기후변화학회 2021 한국에너지기후변화학회 학술대회 Vol.2021 No.11

우리 삶에 있어 생활 편의성이 중요시되면서 포장용기나 일회용품 사용량이 급증함에 따라 폐플라스틱의 발생량이 매년 증가하고 있다. 이에 폐플라스틱을 처리할 수 있는 기술에 대한 관심도가 높아지고 있다. 폐플라스틱 처리 기술 중 하나인 열분해 공정을 통해 연료유로 사용 가능한 열분해유를 생산할 수 있다. 이러한 연료유를 사용할 수 있는 반응 장치 설계나 운전조건 선정을 위해 기초 특성에 대한 자료가 필요한 상황이다. 이에 열분해유를 포함하여 연료유에 속하는 바이오중유, 이온정제유의 연소 특성을 열중량 분석기로 분석하여 비교하였다. 연소 특성 분석은 25 ~ 945 ℃ 온도 범위 내에서 승온 조건 (5 ℃/분, 10 ℃/분, 20 ℃/분)에서 열중량 분석기로 연소 특성을 관찰하였다. 분석 결과는 여러 가지 속도론적 해석(Kissinger, Chatterjee-Conrad, Coats-Redfern, Freeman-Carroll) 방법을 사용하여 비교 해석하였다. 그 결과 연료유 종류에 따라 적합한 해석 방법을 구분 지을 수 있었다.

연료유들의 연소특성에 따른 다양한 속도론적 해석

김지현(Jihyeon Kim),김진호(Jin-Ho Kim),김효식(Hyo-Sik Kim),류재홍(Jae-Hong Ryu),강석환(Suk-Hwan Kang),이예지(Ye-Jee Lee),이수출(Soo-Chool Lee) 한국에너지기후변화학회 2020 에너지기후변화학회지 Vol.15 No.2

Combustion characteristics of fuel oils such as bio heavy oil, pyrolysis oil, and ion refined oil were investigated to reserve basic data in terms of designing a reactor using fuel oil and selecting operating conditions. For the analysis of combustion characteristics, fuel oil was combusted with a thermogravimetric analyzer (TGA) under non-isothermal heating conditions (5 °C/min, 10 °C/min, 20 °C/min) in the air within the range of 25 °C to 945 °C. The activation energy and reaction order for fuel oil combustion have been kinetically interpreted using various methods such as the Kissinger, Chatterjee-Conrad, Coats-Redfern or Freeman-Carroll method. In this study, the activation energy of the three fuel oils was less than 50 kJ/mol, and Kissingers method with a reaction order of 1 showed an activation energy of less than 7.5. As a result, the activation energy and reaction order for the combustion characteristics of the three fuel oils were obtained for Freeman-Carrolls method among several interpretation methods. Through this, the Freeman-Carroll method was commonly applied according to the type of fuel oil (bio heavy oil, pyrolysis oil, ion refined oil), and the Kissinger method was limited to pyrolysis oil within a certain range. Through this study, it was possible to classify an appropriate analysis method according to the type of fuel oil.

클라우드 프로그래밍 도구를 활용한 온라인 수업사례

김지현(JiHYEON Kim) 한국컴퓨터교육학회 2020 한국컴퓨터교육학회 학술발표대회논문집 Vol.24 No.2(B)

프롬프트 기반 데이터 증강을 통한 미디어 유해성 분류

김지현(Jihyeon Kim),구명완(Myoung-Wan Koo) 한국정보과학회 2023 한국정보과학회 학술발표논문집 Vol.2023 No.6

연구논문 : 남자경찰보호복 착용실태 및 만족도에 관한 연구

김지현 ( Jihyeon Kim ) 한국의류학회 2015 한국의류학회지 Vol.39 No.3

This paper examines the protective clothing satisfaction rate of riot policemen. The protective clothing currently in use is the version that underwent enhancement and was distributed in 2009. This version underwent significant enhancements compared to the protective clothing introduced in 1996 in terms of safety and body fitness; however, there is room for further enhancement in terms of activity, thermal comfort and easiness. In this research, a questionnaire survey was conducted on 386 riot policemen working at the Seoul Riot Police Station to study their use of protective clothing and satisfaction rate. The survey questions included safety, activity and body fitness in terms of functionality and comfort as well as easiness and design in terms of wearing comfort. Activity scored the lowest (2.89) in terms of functionality as well as comfort (2.40) that scored the lowest in terms of wearing comfort. It is concluded that, in order to correct deficiencies, the weight of protective clothing must be reduced and design changes must be made to eliminate unnecessary areas in clothing and facilitate faster dressing/undressing. In addition, it is strongly recommended that shock absorption materials be inserted only in vital areas in order to enhance thermal comfort.

남·여 경찰보호복 착용실태 및 만족도 비교

김지현(Jihyeon Kim) 한국복식학회 2015 服飾 Vol.65 No.5

Protective clothing for riot policemen is a special clothing with a purpose of protecting body when putting down a riot. It is a protective clothing for Korean policemen and women in conducting their official duties. It should bee able to safely protect a person wearing it from external threats and symbolically represent the authority of police in management of riots or demonstrations. Functions required for protective clothing for policemen are safety, activity, body fitness in terms of functionality and comfort, convenience, design in terms of wearability. This study investigated and analyzed status of wear and degree of satisfaction on 6 functions of protective clothing of riot policemen, which are to be used as basic data for future development of protective clothing for riot policewomen. The study result shows that men have higher satisfaction in all functions of protective clothing, which indicates a need for development of protective clothing for riot policewomen. As for men``s satisfaction rate, it was in order of comfort <convenience < activity < safety < body fitness < design, suggesting a need for improvement in comfort. As for women``s satisfaction rate, it was activity < comfort < convenience < body fitness < design < safety, requesting an improvement in fit for active movements.

기억기술로서 독립출판: 한국의 독립출판인과 기억의 물질화에 대한 연구

김지현 ( Jihyeon Kim ) 사단법인 아시아문화학술원 2020 인문사회 21 Vol.11 No.6

한국의 독립출판인들에 대한 사례연구를 통해 이 연구는 오늘날 ‘기억기술’로서 독립출판이 갖는 문화정치적 의미를 살피고자 한다. 웹에서 무료로 제공되는 공간들을 이용하지 않고 이들은 종이책을 통해 사적 기록과 공동체의 기억을 직접 출판한다는 점에서 연구의 가치가 있다. 이에 이 연구는 베르나르 스티글러의 ‘기억기술’ 개념을 사용, 이들의 독립출판을 일종의 기억을 외재화하는 기술로서 이해하는 한편 그 문화적 실천의 구체적인 양상을 분석하고자 했다. 독립출판인들 7인을 인터뷰한 결과, 이들에게 독립출판은 이들에게 단순히 자기충족적 활동이 아닌 개인과 공동체의 보존을 위한 기억기술로써 인식되고 있었다. 디지털 기술과 관련해서는 이들이 출판 과정에서 필요한 기술들을 습득하는 과정에서 기술의 양면 가치를 비판적으로 사유하는 모습이 관찰됐다. 이러한 연구결과는 기억기술로서 출판이 갖는 의미를 재탐색하게 하며 디지털 기술과 자기-글쓰기를 함께 논의하는 후속연구에도 시사점을 남긴다. This paper seeks to examine the cultural and political implications of self-publishing as mnemotechnics through the case study of self-publishers in South Korea. Instead of relying on free digital platforms for publishing, self-publishers are committed to the production and distribution of a paper book as a means of storing individual records and memories within the community. To understand self-publishing as the externalisation of memory, this study draws on the concept of ‘mnemotechnics’ presented by Bernard Stiegler. The findings taken from in-depth interviews with seven self-publishers show that although self-publishing as memory technics commonly begins as a self-fulfilling hobby, in many cases it is ultimately used for the preservation of the memories of both individuals and communities. While doing so, self-publishers have come to appreciate the ambivalence of using the digital technologies required for publishing critically. My research findings serve as a basis for interrogating the meaning of self-publishing as mnemotechnics, while shedding light on the importance of studying digital technology and self-writing as a coupled practice.

OTT 서비스 콘텐츠 추천 사용자 경험 분석 - 넷플릭스 사례를 중심으로

김지현(Kim, Jihyeon),하희정(Ha, Heejung),김서희(Kim, Seohui),정영욱(Jung, Youngwook) 인제대학교 디자인연구소 2021 Journal of Integrated Design Research (JIDR) Vol.20 No.2

연구배경 콘텐츠를 제공하는 플랫폼의 다양화, 관련 기술의 발전, 콘텐츠 소비문화 형성으로 OTT 서비스 이용이 증가하고 있다. OTT 서비스는 방대한 양의 콘텐츠를 제공하기 때문에 개인에게 맞춤화된 콘텐츠를 추천하는 기능이 서비스의 핵심이라고 할 수 있으며, 추천 기술과 관련된 많은 연구가 진행되었다. 그러나 사용자 경험 관점에서 콘텐츠 추천을 다룬 연구는 부족한 실정이다. 본 연구에서는 OTT 서비스의 개인화된 경험을 위해 제공되는 콘텐츠 추천 기능이 실제 사용자 경험에 어떠한 영향을 끼치는지 알아보고자 하였다. 연구방법 OTT 서비스 중 가장 많은 사용자가 사용하며 콘텐츠 추천 기능이 활발하게 사용되고 있는 넷플릭스를 연구 대상으로 선정하여 사용자 경험 연구를 진행하였다. 넷플릭스 서비스 이용행태를 알아보기 위해 설문조사를 진행하였으며, 설문조사 응답을 기반으로 사용자 경험 연구에 적합한 10명의 참가자를 선별하였다. 참가자 선별 후, 사용자 경험 여정에 따른 심층 조사를 진행하였다. 해당 과정을 통해 데이터를 수집하고 정성적 분석 방법을 활용해 발견점을 도출하였다. 연구결과 연구 결과 메인화면의 카테고리 구성을 통한 콘텐츠 추천, 취향 일치율, 피드백 방식과 관련한 실제 사용자 경험을 파악할 수 있었다. 이를 토대로 메인화면의 카테고리 구성, 추천의 근거, 추천 피드백과 관련하여 사용자 경험 디자인에서 고려해야 할 점들을 논의 사항으로 제시하였다. 구체적으로 서비스에서 제공하는 추천 기능과 사용자가 기대하는 추천 기능의 간극을 줄일 것, 서비스의 기능과 목적을 저해하지 않으면서도 사용자의 선택권과 자율성을 고려할 것 등을 제안하였다. 결론 OTT 서비스의 추천 기능은 알고리즘의 정확성뿐만 아니라 해당 기능이 제공하는 사용자 경험 디자인 또한 중요하다. 본 연구에서는 추천 기능의 사용자 경험 측면에서의 사용자 경험 연구를 진행하였다. 이를 통해 발견되고 논의된 내용은 이후 콘텐츠 추천과 관련된 사용자 경험의 중요성 및 그에 따른 사용자 경험 개선 연구에 기여할 수 있을 것으로 기대된다. Background The use of OTT services is increasing due to the diversification of content providing platforms, the development of related technologies, and the content consumption culture. Since OTT service provides a vast amount of content, recommending personalized content to users is the core of the service, and there have been many studies related to developing recommendation technology. However, there are few studies dealing with content recommendation from the perspective of user experience. In this study, we tried to find out the ways of content recommendation affects the actual user experience of OTT service. Methods Among the OTT services, Netflix, which is used by the most users and the content recommendation function is actively used, was selected as the subject of study. A survey was conducted to figure out the Netflix service usage behavior, and based on the result of the survey, 10 participants who were suitable for user experience study were selected. With these 10 participants, we conducted an in-depth investigation according to the user experience journey. By qualitatively analyzing collected data from the test, meaningful findings related user experiences of content recommendation functions of OTT service. Result As a result, user experiences regarding categorized content recommendation in main page, taste matching rate, and feedback method were found out. Based on this, we presented the points to consider in user experience design in relation to the category composition of the main page, recommendation rationale, and recommendation feedback. More specifically, it was proposed to close the gap between the recommendation functions provided by the service and expected by the user, and to consider the freedom of user"s choice without compromising the purpose of the service. Conclusion For the content recommendation of OTT service, not only the accuracy of the algorithm but also the way of experiencing the outcome of recommendation is important. In this respect, we user experience study in terms of content recommendation in user"s perspective. Through this research, important findings discovered and discussed related to user experience design of content recommendation of OTT service.