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정재원,Chung, Jae-won,Rogers, J. David 대한토목학회 2014 대한토목학회논문집 Vol.34 No.6
공학적 측면에서 확률론적 액상화 재해 작성법이 점차 요구됨에 따라, 본 연구에서는 실제 액상화 피해 현장의 액상화 가능 지수(Liquefaction Potential Index, LPI)를 이용한 로지스틱 회귀분석으로 액상화 피해 확률을 예측하였다. 또한 이 분석을 바탕으로 광역지역의 액상화 재해도 기법을 제시하였다. 사례 연구로서 미국 세인트루이스 지역 홍수평야의 표준관입시험(273 곳) 결과를 대상으로 LPI를 산정하였고 최대지반가속도를 코크리깅의 이차변수로 적용하여 보간하였다. 연구결과, 일부 구역에서 연약지반과 얕은 지하수위로 인해 LPI 값이 5이상으로 나타나, 액상화로 인한 지반 피해 확률이 0.5 이상으로 예측되었다. Probabilistic liquefaction hazard map is now widely needed for engineering practice. Based on the Liquefaction Potential Index (LPI) calculated from liquefied and non-liquefied cases, we attempted to estimate probabilities of liquefaction induced ground failures using logistic regression. We then applied this approach for the regional area. LPIs were calculated based on 273 Standard Penetration Tests in the floodplains in the St. Louis area, USA and then interpolated using cokriging with the covariable of peak ground acceleration. Our result shows that some areas of $LPI{\geq}5$, due to soft soil layers and shallow groundwater table, appear probabilities of ground $failure{\geq}0.5$.
디지털 시학 관점으로 본 뉴미디어 시대 매체공간의 특성 연구
정재원(Chung, Jae-won) 한국실내디자인학회 2012 한국실내디자인학회논문집 Vol.21 No.5
The purpose of this study had started from trying to look for a new standard in new media era and sounding out possibility of perspective of digital poetry, and had been extracting interpretational elements based on characteristics of otology in digital poetics research in technical method. Through examination of many documentary records, we suggested interpretive elements of medial space based on meaning and the theory of digital poetics. We deduced three perspectives based on relationship between the basic thesis in poetics and interpretive elements of medial space. We used them as tool for analysis of example. We chose as an example that change of program in space is clear through connection of media and space in where new form of creation happens through digital instruments and chose article as subject to which digital technology is applied and had been since 2000, The result of this study is as following: First, epistemological analysis about a space of digital media in new media era requires poetical approach unlike aesthetic approach. We can endow creative action and creation process with significance and pay attention to technical method of manufacturing, stating appropriateness of perspective in digital poetics. Second, the justice of digital poetics and its basic thesis help derive analytic elements from medial space and study purpose of production, technical method, ontological characteristics, which are three perspectives of digital poetics. Third, it analyzed characteristics of example according to three perspectives above and we can analyze characteristics of spacial expression in space of digital media into potential, trans-active, and semiosis space. It would be possible through analyzing examples in digital poetic perspective to overlook new methods of design in 21th and various perspectives and possibilities of medial space design.
CO₂ 농도 및 소음레벨 센서 기반의 재실감지방법에 관한 연구
정재원(Jai-Won Chung),장달원(Dalwon Jang),이재원(Jae-Won Lee),김미지(Mi-Ji Kim),김서율(Seo-Yul Kim),이종설(Jong-Seol Lee) 대한전기학회 2021 대한전기학회 학술대회 논문집 Vol.2021 No.10
가정집 등의 주거공간을 대상으로 CO₂ 농도 및 소음레벨 센서와 기계학습방법을 활용한 재실감지방법에 대해 알아본 연구는 조사되지 않았다. 본 논문에서는 CO₂ 농도 및 소음레벨 센서 측정값을 사용해 주거 공간에서 재실여부를 감지하는 랜덤 포레스트 모형(random forest model)을 제안한다. 실험을 통해 1분 간격으로 CO₂ 농도 및 소음레벨, 재실여부를 측정했다. 측정된 전체 데이터(n = 4,665) 중 약 80%는 트레이닝 셋 데이터(n = 3,732)로 5차 교차검증방법(5-fold cross validation method)을 사용해 랜덤 포레스트 모형을 구축하는데 사용했다. 전체 데이터 중 약 20%는 테스트 셋 데이터(n = 933)로 사용해 구축한 랜덤 포레스트 모형의 예측 성능을 평가해본 결과, CO₂ 농도 및 소음레벨 값을 사용해 87.2%의 정확도로 재실유무를 감지할 수 있는 것으로 나타났다.
임신 말기 뇌실확장증 및 미성숙폐가 합병된 과도신전 경부의 태아
정재원 ( Jae Won Chung ),이은성 ( Eun Sung Lee ),백유진 ( Yu Chin Paek ),이경희 ( Kyung Hee Lee ),설현주 ( Hyun Joo Seol ),오민정 ( Min Jeong Oh ),김해중 ( Hai Joong Kim ) 대한주산의학회 2006 Perinatology Vol.17 No.3
과도신전된 태아두(hyperextended neck)는 산전초음파로 발견되어질 수 있는 다양한 태위들 중 하나로 과도신전된 태아두를 진단하는 것은 중요한 일인데 특히 질식분만을 시도하게 되는 경우 경추손상의 위험도가 증가하기 때문이다. 또한 지속적인 과도신전된 경부를 보이는 태아에서는 구조적 이상의 동반 및 다양한 증후군과 연관될 가능성이 높고 구조적 이상이 동반된 경우 자궁내 또는 출생 후 사망이나 질병이환률이 현저히 증가한다고 알려져 있다. 따라서 과도신전된 경부를 보이는 태아에서 다른 구조적 이상여부 확인을 위해 좀 더 자세한 평가를 하고 그에 따르는 적절한 조치가 필요하다. 본 저자들은 산전임신중반기에 발견된 과도신전된 경부를 가진 태아가 임신후반기에 뇌실확장 및 폐미성숙 소견을 보였던 1예를 경험하였기에 증례 보고하는 바이다. Hyperextended neck of the fetal head is among the various fetal attitudes detected by prenatal sonography. Various etiologies may lead to hyperextension of the fetal head, including fetal anomalies such as structural abnormalities, conjoined twins and fetal neck masses, nuchal cord and uterine factors such as leiomyoma and uterine malformations. The importance of the precise prenatal diagnosis of this condition relates not only to the delivery mode, but also to the detection of associated conditions, as noted above. We report a case of a fetus whose persistent hyperextended neck was detected by midtrimester sonography, and who later demonstrated ventriculomegaly and lung immaturity in the 3rd trimester.
인스타그램 헤어미용 콘텐츠에 대한 소비자 인식과 행동의도 연구
정재원 ( Jae-won Chung ),양은진 ( Eun-jin Yang ) 한국미용학회 2021 한국미용학회지 Vol.27 No.2
This study aims to provide the results as useful basic data in establishing a marketing strategy for the hair beauty industry. By conducting a self-written questionnaire to 270 Instagram users in their teens to 40's or older to find out the effect of hair beauty content characteristic perceived by consumers on Instagram. The results of this study are as follows. First, the characteristics of hair beauty content appeared as intimacy, interest, and verity, and the behavioral intention was divided into purchase intention and recommendation intention. Second, as a result of examining the difference between the characteristics of hair beauty content and behavioral intention according to the general characteristics, there were differences in age and gender. Third, hair beauty content was found to have a significant positive effect on consumers’ behavioral intention. Therefore, when consumers empathize with hair beauty content and recognize intimacy, and when truthfulness of information is transmitted, consumers show positive reaction to purchase and recommendation intentions. Since this study is a quantitative study related to Instagram hair beauty content, in the future, if qualitative research such as interview which is related to this study is conducted, results more in-depth are expected.
러시아 시민사회의 변화: 신자유주의 세계 경제와 권위주의 국가와의 관계
정재원 ( Jae Won Chung ) 서울대학교 러시아연구소 2013 러시아연구 Vol.23 No.2
In general, civil society is defined as the sphere situated between the state and the market which can serve as a promoter of democratic values, provide models of active participation of citizen and temper the power of the state. And after the fall of socialist system, some scholars of democratic transitions became to regard civil society as an important factor of democratization. In the 1990s, however, the concept of civil society became central to a new vision of development that was driven by beliefs organized around the twin poles of neoliberal economics and liberal democratic theory. The goals, agendas, and projects of NGOs that had received assistance from Western organizations had shifted over time to reflect the interests of the West and (neo)liberal values rather than domestic needs. The neoliberal ideology, driven by the West, on the one hand, have made Russian civil society to be subordinated to it, and on the other hand, have given Russian authoritarian state the pretext to surpass on civil society. Russian authorities were constructing hybrid system of state-civil society relations in which independent civic organizations have been allowed to exist, but where they compete with state-sponsored groups on a highly unequal basis. Nevertheless, despite the Kremlin`s encroachments upon the existing domains of civil society, independent grassroots movements that have been formed and financed domestically rapidly multiply in numbers and entrench their positions across the country. These organizations are prepared to face the state in defense of their interests.