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랭체인을 활용한 국가 연구 개발 동향 분석과 연구 성과 분류: NTIS 관광 산업을 중심으로
김남현(Namhyun Kim),김세형(Sehyoung Kim),강주영(Juyoung Kang) 한국전자거래학회 2024 한국전자거래학회지 Vol.29 No.2
현대인은 여행을 통해 심리적 행복감을 얻는 데 익숙해지고 있다. 따라서 다양한 여행 콘텐츠에 대한 수요가 늘어나고 있고, 이러한 수요에 대응하기 위해 관광 인프라 확충과 새로운 콘텐츠 개발이 이루어지고 있다. 그러나 코로나19로 인해 여행의 자유가 제한되고 관광 산업이 큰 타격을 받았다. 이에 따라, 관광 산업의 회복을 위한 노력과 코로나19의 영향에 대응하는 국가적 연구 개발의 변화가 필요하다는 전망이 나오고 있다. 이 연구는 ‘관광’, ‘여행’, ‘trip’, ‘travel’, ‘journey’ 등의 키워드로 NTIS에서 국가 연구 개발 보고서를 수집하고, 텍스트 임베딩 모델을 사용하여 유사도를 분석해 연구 개발 성과를 클러스터링했다. 각 클러스터의 내용은 생성형 AI를 통해 요약되었고, 이를 바탕으로 결과를 정리했다. 이 연구는 텍스트 임베딩 모델과 생성형AI의 활용으로 연구자의 주관이 최소화되었으며, 관광 관련 국가 연구 개발의 최신 동향을 파악했다. 기존의 연구 개발 군집 체계와 비교해 본 연구의 클러스터링 결과는 연구 분류에 새로운 방법을 제시할 수 있는 가능성을 보여주었다. 이 결과를 바탕으로 관광 산업과 서비스 개발 동향 및 인사이트를 발굴하고, 향후 연구 개발 계획에 활용할 수 있기를 기대한다. Modern individuals are becoming accustomed to gaining psychological happiness through travel. Consequently, the demand for diverse travel content is increasing, leading to the expansion of tourism infrastructure and the development of new content to meet these needs. However, the COVID-19 pandemic has restricted the freedom to travel and significantly impacted the tourism industry. As a result, there is a growing outlook that efforts to revive the tourism industry and changes in national research and development to respond to the effects of COVID-19 are necessary. This study collected national research and development reports from NTIS using keywords such as ‘tourism’, ‘travel’, ‘trip’, ‘travel’, and ‘journey’. The collected data was analyzed for similarity using a text embedding model, and the research and development outcomes were clustered. The content of each cluster was summarized using generative AI, and the results were organized accordingly. This study minimized researcher subjectivity through the use of text embedding models and generative AI, providing insights into the latest trends in national research and development related to tourism. Additionally, compared to traditional research clustering systems, the clustering results of this study demonstrate the potential to offer a new method for research classification. Based on these findings, it is hoped that insights and trends in tourism industry and service development can be identified and utilized in future research and development planning.
운전자 안정성 향상을 위한 Generative Adversarial Network 기반의 야간 도로 영상 변환 시스템
안남현(Namhyun Ahn),강석주(Suk-Ju Kang) 한국방송·미디어공학회 2018 방송공학회논문지 Vol.23 No.6
Advanced driver assistance system(ADAS) is a major technique in the intelligent vehicle field. The techniques for ADAS can be separated in two classes, i.e., methods that directly control the movement of vehicle and that indirectly provide convenience to driver. In this paper, we propose a novel system that gives a visual assistance to driver by translating a night road image to a day road image. We use the black box images capturing the front road view of vehicle as inputs. The black box images are cropped into three parts and simultaneously translated into day images by the proposed image translation module. Then, the translated images are recollected to original size. The experimental result shows that the proposed method generates realistic images and outperforms the conventional algorithms.
Effect of prestrain on hydrogen diffusion and trapping in structural steel
Park, Cheolho,Kang, Namhyun,Kim, Myunghyun,Liu, Stephen Elsevier 2019 Materials letters Vol.235 No.-
<P><B>Abstract</B></P> <P>Hydrogen permeation tests were electrochemically performed to measure hydrogen diffusion and trapping in EH 36 steel. Permeation transients were measured through charging and decaying cycles, for specimens prestrained to varying degrees (0–20%). With increasing prestrain, the effective hydrogen diffusivity (<I>D<SUB>eff</SUB> </I>) decreased, while the total/reversible hydrogen content (<I>C<SUB>o</SUB> </I> and <I>C<SUB>r</SUB>, respectively</I>) increased. The immobile dislocation of the 20%-prestrained specimens decreased <I>D<SUB>eff</SUB> </I> by approximately ten times and increased <I>C<SUB>o</SUB> </I> and <I>C<SUB>r</SUB> </I> by approximately three times. The amount of irreversibly trapped hydrogen (<I>C<SUB>irr</SUB> </I>) remained approximately the same, regardless of the prestrain. The dislocations delay the motion of hydrogen and contain more reversible hydrogen.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Hydrogen permeation tests successfully measured the hydrogen diffusivity and concentration. </LI> <LI> As the prestrain increased from 0 to 20%, the effective hydrogen diffusivity decreased. </LI> <LI> Total and reversible hydrogen concentrations increased with the prestrain. </LI> <LI> Irreversible hydrogen showed mostly the same value regardless of prestrain. </LI> <LI> The dislocations delay the motion of hydrogen and contain more reversible hydrogen. </LI> </UL> </P>