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유튜브 은닉 질적 정보 분석 기반 유튜브 채널 랭킹 기법
이지현,오하영,Lee, Ji Hyeon,Oh, Hayoung 한국정보통신학회 2019 한국정보통신학회논문지 Vol.23 No.7
현 시대를 유튜브 시대라고 불릴 정도로 유튜브가 큰 인기를 얻고 있다. 동영상 시청자뿐만 아니라 실제 영상 제작자, 즉 유튜버들도 늘어나고 있어 다양한 주제의 컨텐츠들을 이용할 수 있게 되었다. 사용자와 컨텐츠의 수가 증가하면서 정보 선택의 폭은 커지고 있다는 장점을 갖고 있지만 사용자의 필요에 맞는 정보를 골라내기는 더욱 어렵다. 따라서 본 연구에서는 사용자가 필요로 하는 주제의 채널을 다각도에서 분석하고, 해당 채널의 랭킹을 제공하고자 한다. 채널을 크롤링하고 통계정보인 양적 데이터와 댓글의 은닉 질적 데이터 분석을 통해 채널과 채널 영상의 평균 인지도를 측정한다. 최종적인 사례 연구로써 수치 데이터 통계와 감성분석 결과 기반 사용자에게 영어 학습 채널을 추천하여 시공간에 구애 받지 않는 플립드 러닝 효과의 극대 성을 보인다. Youtube has become so popular that it is called the age of YouTube. As the number of users and contents increase, the choice of information increases. However, it is difficult to select information that meets the needs of users. YouTube provides recommendations based on their watch list. Therefore, in this study, we want to analyze the channel of user's subject in various angles and provide the proposed scheme based on the crawled channels, measurement of the perception of channels and channel videos through quantitative data and hidden qualitative data analysis. Based on the above two data analysis, it is possible to know the recognition of the channel and the recognition of the channel video, thereby providing a ranking of the channels that deal with the topic. Finally, as a case study, we recommend English learning channels to users based on numerical data statistics and emotional analysis results to maximize flipped learning effect regardless of time and space.
시판용 기능성 음료의 관능적 특성과 소비자 기호 유도 인자
이지현,양정은,정라나,Lee, Ji-Hyeon,Yang, Jeong-Eun,Chung, Lana 한국식품조리과학회 2012 한국식품조리과학회지 Vol.28 No.6
This study was conducted to understand sensory characteristics of commercial functional beverages, to analyze and the drivers of liking and disliking of it by Korean consumers. Descriptive analysis and consumer taste testing were conducted with ten commercial products of functional beverages. Samples were consisted of good for beauty, relieving hangovers, and health tonics. For the descriptive analysis, 45 attributes were developed by ten panelists and it shows differences among the all samples. For the consumer testing, 81 panels evaluated the overall liking, acceptance of appearance, odor, flavor, and texture of 10 samples. As a result, attributes of brightness, yellow color, Nurungji flavor, roasted bean power flavor, and milky texture of functional beverages were positive drivers of liking, but attributes of astringent texture, bitter taste, and viscosity were negative drivers of liking on the commercial functional beverages.
청간해주탕(淸肝解酒湯)이 $TGF-{\beta}1$ 유도성 간섬유화에 미치는 영향
이지현,김영철,우홍정,이장훈,Lee, Ji-Hyeon,Kim, Young-Chul,Woo, Hong-Jung,Lee, Jang-Hoon 대한한방내과학회 2005 大韓韓方內科學會誌 Vol.26 No.1
Objectives : The aim of this study is to characterize the effect of Chungganhaeju-tang on $TGF-{\beta}l$-induced hepatic fibrosis. Materials and Methods : mRNA and protein expression levels of $TGF-{\beta}l$ in Chungganhaeju-tang treated HepG2 cells were compared to untreated cells using quantitative RT-PCR and ELISA assay, respectively. mRNA expression levels of the $TGF-{\beta}l$ signaling pathway genes $(T{\beta}R-I,\;T{\beta}R-II,\;Smad2,\;Smad3,\;Smad4,\;and\;PAI-1)$ and fibrosis-associated genes (CTGF, fibronectin, and collagen type $l{\alpha}$) were evaluated by quantitative RT-PCR. The effect of Chungganhaeju-tang on cell proliferation of T3891 human fibroblast was evaluated using $[^3H]Thymidine$ Incorporation Assay. Results : Inhibition of $TGF-{\beta}l$ mRNA expression and protein production was observed with treatment of Chungganhaeju-tang and seen to be dose and time dependent. Whereas $TGF-{\beta}l$-mediated induction of PAI-1 was suppressed with treatment of Chungganhaeju-tang, expression of the $TGF-{\beta}l$ signaling pathway genes such as $T{\beta}R-I$, $T{\beta}R-II$, Smad2, Smad3, and Smad4 was not affected. With treatment of Chungganhaeju-tang, inhibition of $TGF-{\beta}l$-induced cell proliferation of T3891 human fibroblast was observed, as well as abrogation of $TGF-{\beta}l$-mediated transcriptional up-regulation of CTGF, fibronectin, and collagen type $I{\alpha}$. Conclusion : This study strongly suggests that the liver cirrhosis-suppressive activity of Chungganhaeju-tang may be derived at least in part from its inhibitory effect on $TGF-{\beta}l$ functions, such as blockade of $TGF-{\beta}l$ stimulation of fibroblast cell proliferation and fibrosis-related gene expression as well as expression of $TGF-{\beta}l$ itself.
이지현,황해진,김진호,황광택,한규성,Lee, Ji-Hyeon,Hwang, Hae-Jin,Kim, Jin-Ho,Hwang, Kwang-Taek,Han, Kyu-Sung 한국세라믹학회 2014 한국세라믹학회지 Vol.51 No.5
The properties of black ceramic pigments including thermal and glaze stability were systematically investigated so that these pigments could be used to decorate porcelain products. Various compositions of $(Ni,Mn)(Fe,Cr,Mn)_2O_4$ and $Co(Fe,Cr)_2O_4$ powders were synthesised using a solid state reaction method. The obtained $Co(Fe,Cr)_2O_4$ and $(Ni,Mn)(Fe,Cr,Mn)_2O_4$ powders showed single phases of spinel structure after calcination processes at $1000^{\circ}C$ and $1200^{\circ}C$, respectively. CIE $L^*a^*b^*$ colourimetric parameters of glazed $Co(Fe,Cr)_2O_4$ and $(Ni,Mn)(Fe,Cr,Mn)_2O_4$ pigments were analyzed according to the different amounts of Cr substitution. In addition, the amount of $Cr^{+6}$ remaining in the $Co(Fe,Cr)_2O_4$ and $(Ni,Mn)(Fe,Cr,Mn)_2O_4$ pigments was also measured.
한방비만치료가 비만환자의 간기능에 미치는 영향 증례보고
이지현,전우현,Lee, Ji-Hyeon,Jeon, Woo-Hyeon 한방비만학회 2017 한방비만학회지 Vol.17 No.1
비만을 주소증으로 내원하여 LFT를 시행하고, 한약 치료를 포함한 비만 치료 경과 후 다시 추적한 결과 체중 감량과 간효소 수치의 개선 경향을 보인 10예를 보고하였다. 본 연구를 토대로 한약 치료를 포함한 한방 비만치료 시 유효성과 안전성에 대한 근거를 더 확보해나갈 수 있을 것으로 생각된다. Many obesity patients were affected by depressed liver function including hepatosteatosis. The aim of this study was to investigate the clinical effect of the obesity therapy with Korean herbal medicine (KHM) on obese patient with abnormal liver function. This is a retrospective observational study performed on obesity patients with abnormal liver function. All subjects have taken serum liver function tests (LFTs) before treatment. Ten patients showed abnormal LFTs. They were treated with KHM at least 15 days. During this treatment, LFTs were evaluated afterwards. Body weight and body mass index of the patients were decreased during treatments. Five of 10 subjects recovered normal levels of LFTs. While other subjects remained at abnormal level but their levels were decreased. This study shows that the obesity therapy including KHM could be effective to improve liver function on obese patient. Additional large scale studies are necessary for more evidences.
연중특별기획: 몸을 망가뜨리는 인간의 치명적 실수, 무관심 - 잠을 자도 피곤하세요? 당신이 잠 못 드는 밤에는 분명 이유가 있다
이지현,Lee, Ji-Hyeon 한국건강관리협회 2010 건강소식 Vol.34 No.8
안녕히 주무셨습니까? 이른 아침 어른을 문안할 때 흔히 사용하는 인사말이다. 그만큼 인간의 생활에서 잠이 중요한 역할을 차지하고 전날 밤에 잘 잤는지의 여부가 다음날 기분을 좌우하기 때문이다. 잠이 보약이라는 말이 있다. 반대로 생각하면 잠을 제대로 자지 못하면 건강에 적신호가 켜진다는 것이다. 잠을 제대로 못 이루게 만들거나 잠을 자도 피곤하게 만드는 원인은 매우 다양하다. 우울증, 수면무호흡증, 하지불안증, 기면증 등이 대표적인 원인들이다. 편안한 숙면을 방해하는 원인들을 사례를 통해 알아본다.