Effect of Rosuvastatin on Coronary Flow Reserve in Hypertensive Patients at Cardiovascular Risk

Yujin Yang,EunSoon Hwang,Seung-Ah Lee,이사민,김대희,송종민,강덕현 한국심초음파학회 2021 Journal of Cardiovascular Imaging (J Cardiovasc Im Vol.29 No.3

BACKGROUND: It has been unclear whether statin therapy directly improves coronary flow reserve (CFR) in hypertensive patients at cardiovascular risk, independent of lifestyle modification and antihypertensive medications. METHODS: In this double-blind, randomized controlled trial, we randomly assigned 95 hypertensive patients at cardiovascular risk to receive either rosuvastatin 10 mg or placebo for 12 months, in addition to antihypertensive therapy and lifestyle modification for hypercholesterolemia. Using Doppler echocardiography, coronary flow velocity in the distal left anterior descending artery was measured and CFR was calculated as the ratio of hyperemic to basal averaged peak diastolic flow velocity. The primary end point was change in CFR from baseline to 12 months follow-up. RESULTS: Low-density lipoprotein-cholesterol was changed from 157 ± 23 to 84 ± 16 mg/dL in the rosuvastatin group (p < 0.001) and from 152 ± 19 to 144 ± 22 mg/dL in the control group (p = 0.041, but there were no significant differences between the treatment groups in the changes in C-reactive protein, high-density lipoprotein cholesterol, and blood pressures. CFR was changed from 3.03 ± 0.44 to 3.25 ± 0.49 in the rosuvastatin group (p < 0.001) and from 3.15 ± 0.54 to 3.17 ± 0.56 in the control group (p = 0.65). The primary end point of change in CFR was significantly different between the rosuvastatin group and the control group (0.216 ± 0.279 vs. 0.015 ± 0.217; p < 0.001). CONCLUSIONS: Compared with lifestyle modification alone, addition of rosuvastatin significantly improved CFR in hypertensive patients at cardiovascular risk.

Mapping the Polarization of the Radio-Loud Lyman Alpha Nebula B3 J2330+3927

Yujin Yang,Chang You,Ann Zabludoff,Paul Smith,Buell Jannuzi,Moire Prescott 한국천문학회 2015 天文學會報 Vol.40 No.2

GEMINI NEAR-IR PHOTOMETRY OF THE ARCHES CLUSTER NEAR THE GALACTIC CENTER

YANG YUJIN,PARK HONG SOO,LEE MYUNG GYOON,LEE SANG-GAK The Korean Astronomical Society 2002 Journal of The Korean Astronomical Society Vol.35 No.3

We present Near-IR photometry of the Arches cluster, a young and massive stellar cluster near the Galactic center. We have analyzed the high resolution (FWHM $\~$ 0.2") Hand K' band images in the Galactic Center Demonstration Science Data Set, which were obtained with the Gemini/Hokupa's adaptive optics (AO) system. We present the color-magnitude diagram, the luminosity function and the initial mass function (IMF) of the stars in the Arches cluster in comparison with the HST/NICMOS data. The IMF slope for the range of 1.0 < log (M/M$\bigodot$) < 2.1 is estimated to be ${\Gamma} = -0.79 {\pm} 0.16$, in good agreements with the earlier result based on the HST/NICMOS data [Figer et al. 1999, ApJ, 525, 750]. These results strengthen the evidence that the IMF of the bright. stars close to the Galactic center is much flatter than that for the solar neighborhood. This is also consistent with a recent finding that the IMFs of the bright stars in young clusters in M33 get flatter as the galactocentric distance decreases [Lee et al. 2001, astro-ph 0109258]. It is found that the power of the Gemini/ AO system is comparable, with some limits, to that of the HST/NICMOS.

양자컴퓨터를 통한 대칭키 및 공개키 해킹 동향

오유진(Yujin Oh),양유진(Yujin Yang),장경배(Kyungbae Jang),서화정(Hwa-jeong Seo) 한국정보보호학회 2023 情報保護學會誌 Vol.33 No.2

영유아기 자녀를 위한 자기조절력 측정척도의 개발을 위한 기초연구

양옥승 ( Yang Okseung ),김정림 ( Kim Junglim ),양유진 ( Yang Yujin ) 열린부모교육학회 2016 열린부모교육연구 Vol.8 No.4

영유아기 자녀를 위한 자기조절력 측정척도의 개발을 위해 본 연구에서는 영유아 교육 및 보육 전문가 20명을 대상으로 두 차례에 걸쳐 델파이 조사를 실시하였다. 조사에 사용된 시안은 5점 리커트 척도로서 총 96문항(자기감정 인지 19문항, 타인감정 인지 16문항, 감정억제 16문항, 감정대처 14문항, 자기의도 인지 15문항, 행동계획 및 모니터링 16문항)으로 구성되었다. 수집된 자료에 대해서는 각 문항의 평균 및 표준편차, 사분범위(IQR), 내용타당도 비율(CVR) 값을 산출하여 문항의 타당성을 검토하였다. 델파이 1차 조사 결과, 문항선정기준을 충족시키지 못한 문항은 8문항으로 확인되었으나 패널들의 의견을 반영하여 문항 내용을 수정하였다. 델파이 2차 조사에서 모든 문항의 평균 및 표준편차, CVR 값이 문항 선정 기준(M≥4.00, SD≤1.00, CVR≥.42)을 충족시키는 것으로 나타났다. 사분범위를 검토했을 때 1문항이 문항 선정 기준(Q3-Q1≥1.00)에 미달하는 것으로 나타났으나 다각적인 기준으로 문항의 타당성을 분석한 결과, 영유아기 자녀를 위한 자기조절력 측정척도는 최종 96문항으로 확정되었다. In order to develop self-regulation scale for infants and preschoolers, two sessions of Delphi surveys were performed on 20 educational and day care experts. Draft proposal for the surveys was a 5 point Likert scale consisting of total of 96 items as follows: 19 items for recognition of one`s own emotions; 16 items for recognition of others` emotions; 16 items for inhibition of emotions; 14 items for emotional coping; 15 items for recognition of his/her own intentions; 16 items for behavior planning and monitoring. Validity of the items was evaluated by considering the mean, standard deviation, inter-quartile range(IQR) and content validity ratio(CVR) of each items. There were 8 items that were deemed insufficient to qualify as items from the first session of Delphi survey, resulting in revision of the contents of the items based on the panelists` recommendations. All items were found to qualify as items from the second session of Delphi survey based on mean, standard deviation and CVR values(M≥4.00, SD≤1.00, CVR≥.42). One item was found to be insufficient to qualify as an item based on the IQR, but upon multilateral analysis of items, total of 96 items were confirmed for self-regulation scale for infants and preschoolers.

유아교사의 테크노스트레스와 행복감이 테크놀로지 교과교육학지식에 미치는 영향

양유진 ( Yang Yujin ),이주영 ( Lee Juyoung ) 한국유아교육학회 2021 유아교육연구 Vol.41 No.6

본 연구는 유아교사의 테크노스트레스와 행복감, 테크놀로지 교과교육학지식의 관계를 탐색하고, 이를 통해 유아교사의 테크노스트레스와 행복감이 테크놀로지 교과교육학지식에 미치는 영향을 살펴보고자 하였다. 이를 위해 유아교육기관(유치원, 어린이집)에 재직 중인 교사 210명을 표집으로 조사하였다. 수집된 자료는 SPSS 21.0을 사용하여 Pearson의 상관관계분석, 단계적 중다회귀분석을 실시하였다. 연구 결과, 유아교사의 행복감과 테크놀로지 교과교육학지식은 정적상관관계가 있는 것으로 나타났다. 또한, 유아교사의 테크노스트레스 하위요인 중 테크노 과부하, 테크노 불안감과 행복감 하위요인 중 외적 행복은 테크놀로지 교과교육학지식에 유의미한 정적 예측 변인으로 나타났다. 반면, 테크노스트레스 하위요인 중 테크노 복잡성은 테크놀로지 교과교육학지식에 유의미한 부적 예측 변인으로 나타났다. 이러한 결과를 토대로, 유아교사의 테크놀로지 교과교육학지식과 관련된 변인의 학문적 이해와 더불어 테크놀로지의 통합이 강조되는 현시점에서 예비교사와 현직교사 교육을 위한 교육적 함의에 대해 논하였다. This study explores the relationships among early childhood teachers’ techno-stress, happiness, and “Technology, Pedagogy, And Content Knowledge (TPACK)”, and examine the impact of techno-stress and happiness on TPACK. For this purpose, 210 teachers working at early childhood education institutions (kindergartens and daycare centers) were selected. Pearson’s correlation analysis and stepwise multiple regression analysis were conducted with the collected data, using SPSS 21.0. As a result of the study, a positive correlation was revealed between early childhood teachers’ happiness and TPACK. In addition, techno-overload and techno-insecurity which are the sub-factors of early childhood teachers’ techno-stress, and external happiness which is a sub-factor of happiness, were revealed as significant positive variables predicting TPACK. On the other hand, techno-complexity, a sub-factor of techno-stress, was a significant negative variable predicting TPACK. Based on these results, the implications for education of pre-service and in-service teachers were discussed. It is meaningful that this study was conducted at this present moment when the integration of technologies, along with an academic understanding of the variables related to early childhood teachers’ TPACK, is emphasized.

디자인 재능기부의 문제점과 위험요소

양유진(YuJin Yang),오창섭(ChangSup Oh) 한국디자인학회 2016 디자인학연구 Vol.29 No.3

성형외과 광고에 나타난 디자인 문화에 관한 연구

양유진(YuJin Yang),오창섭(ChangSup Oh) 한국디자인학회 2015 디자인학연구 Vol.28 No.3

유튜브 어린이 콘텐츠 현황 분석 및 적절성 평가

양유진(Yang, Yujin),전희경(Chun, Heekyung) 한국어린이미디어학회 2021 어린이미디어연구 Vol.20 No.3

본 연구는 국내에서 인기 있는 유튜브 어린이 콘텐츠를 분석하고 그 적절성을 평가하는 데 목적이 있다. 이를 위해 구독자 수 상위 100위 안에 드는 국내 어린이 콘텐츠 채널 6개를 선정하고, 조회 수를 기준으로 채널별 상위 10개의 콘텐츠를 선정하여 총 60개의 어린이 콘텐츠에 대해 적절성을 분석하였다. 연구에 선정된 유튜브 어린이 채널의 일반적 현황과 전체적 특성을 살펴본 결과, 각 채널은 많은 수의 콘텐츠들이 업로드되어 다양성을 확보하고 있었으며, 각각이 다른 특성을 보이고 있었다. 또한, 유튜브 어린이 채널은 개인뿐만 아니라 기업에서 더 많이 참가하는 양상을 보였으며, 특히 기업이 운영하는 채널은 공익성 또는 상업적 성격을 함께 띠는 특성을 보이고 있었다. 둘째, 분석대상으로 선정된 6개 채널의 60편의 영상을 발달 적합성, 콘텐츠 질, 디자인 특성, 내용 영역 네 가지 하위범주로 나누어 분석한 결과, 영유아에게 추천할 만한 콘텐츠는 총 40편이며, 비추천 콘텐츠는 총 20편으로 영유아에게 추천할 만한 콘텐츠가 더 많은 것으로 나타났다. 이러한 결과를 토대로 유튜브 어린이 콘텐츠가 앞으로 나아가야 할 방향에 대해 논의하였다. The purpose of this study is to analyze and evaluate YouTube content popular with young children in South Korea. For this purpose, six domestic channels providing for children among the Top 100 subscribed YouTube Channels were selected, and the top 10 videos for each channel based on the number of view were chosen for further analysis(sixty videos in total). Analysis of the general status and overall characteristics of the YouTube channels selected for the study showed that each channel featured a diverse range of videos, showing different characteristics. In addition, there were more companies than individuals providing YouTube content for children, and the channels operated by companies featured both social education and commercial elements simultaneously. Second, the sixty videos chosen for further analysis from the six channels were divided into four sub-categories; age suitability, contents quality, design characteristics, and learning objective. The subsequent analysis revealed that forty videos were appropriate for infants and children, while twenty were not. Thus, there were more contents that could be recommended for infants and children. Based on these findings, this study discussed the production and development of YouTube contents.

코드 기반 암호와 아이소제니 기반 암호의 공격 사례

양유진(Yujin Yang),오유진(Yujin Oh),장경배(Kyungbae Jang),서화정(Hwajeong Seo) 한국정보보호학회 2023 情報保護學會誌 Vol.33 No.1