랜덤포레스트를 활용한 교량 바닥판의 이종손상 원인 추정 기술 개발

정현진,박기태,김재환,권태호,이종한 대한토목학회 2024 대한토목학회논문집 Vol.44 No.1

정밀안전진단보고서를 분석한 결과 국내 고속도로 교량은 결함, 열화, 물리력에 의한 손상이 주요하게 발생한다. 특히 열화는 시간이 경과함에 따라 다양한 환경 영향인자와 외부적 요인에 의해 발생하는 필연적인 손상이다. 교량 바닥판의 경우 열화가 가장 빠른 부재로, 균열부를 중심으로 철근부식, 박리/박락 등의 여러 가지 유형의 이종손상이 함께 발생하는 것으로 분석된다. 따라서 교량의 이종손상과 열화환경 간의 상관관계를 밝히고 이를 통해 교량의 이종손상 발생 원인을 규명해야 한다. 본 연구에서는 랜덤포레스트를 활용하여 교량의 이종손상 예측 모델을 개발하였으며, 개발된 모델을 통해 이종손상 발생에 영향을 미치는 상위 5가지 영향인자를 도출하였다. 이를 통해 장래 교량의 유지관리 및 예산을 추정하는 분야에 활용하는 기초자료가 될 수 있을 것으로 판단된다. An investigation into the detailed safety diagnosis report indicates that domestic highway bridges mainly suffer from defects, deterioration, and damage due to physical forces. In particular, deterioration is an inevitable damage that occurs due to various environmental and external factors over time. In particular, bridge deck is very vulnerable to cracks, which occur along with various types of damages such as rebar corrosion and surface delamination. Thus, this study evaluates a correlation between heterogeneous damage and deterioration environment and then identifies the main causes of such heterogeneous damage. After all, a bridge heterogeneous damage prediction model was developed using random forests to determine the top five factors contributing to the occurrence of the heterogeneous damage. The results of the study would serve as a basic data for estimating bridge maintenance and budget.

수평 매복된 상악 견치의 교정적 견인

이종은,최형준,이제호,이종갑 대한소아치과학회 2003 大韓小兒齒科學會誌 Vol.30 No.4

본 증례에서는 구개측으로 수평 매복되어 발거 가능성이 높은 상악 우측 견치를 외과적 수술과 교정적 견인을 통하여 성공적으로 재위치 시켰다. 견인시 부여한 힘의 강도와 방향이 적절하였으므로 부착치은을 충분하게 유지할 수 있었고, 특이할 만한 합병증도 관찰되지 않았다. 매복치의 교정적 견인시 생리적 맹출에 근접하도록 치료하는 것이 바람직할 것으로 사료된다.

일본산 곱추잎벌레 아과(亞科) 유충의 계통분류학적 연구(딱정벌레목(目) : 잎벌레과)

이종은 고려대학교 한국곤충연구소 1993 昆蟲硏究誌 Vol.19 No.1

일본산 곱추잎벌레亞科 유충의 계통분류학적 연구(딱정벌레目 : 잎벌레科) 이종은 (안동대학교 생물학과) 昆蟲硏究誌 19: 60~68, 1993. 본 논문은 일본산 잎벌레과 유충 분류에 관한 연구의 일부로서, 곱추잎벌레아과에 속하는 Basilepta fulvipes, Colposcelis signata, Demotina fasciculata, D. modesta, Hyperaxis fasciata, Lypesthes ater, L. lewisii, Scelodonta sauteri 및 Xanthonia placida의 9종을 다루었으며, 이들 유추은 일본에서 처음 기재된다. 또한 이들 유충에 관한 분류 학적 소견도 언급한다. The present paper is a part of the study on the larvae of leaf beetles in Japan. It described and illustrated nine species belonging to seven genera in the subfamily Eumolpinae; Basilepta fubuipes, Colposcelis signata, Demotina fasciculata, D. modesta, Hyperaxis fasciota, Lypesthes ater, L. lowisii, scelodonta sauleri and Xanthonia vlacida. It is the first to deal the larvae taxonomically in Japan. Their taxonomic remarks are also given.

한국문학에 나타난 한국인의 자연관 연구 ( A Study on Korean views of nature appeared in Korean literature ) : 귀거래 시를 통해 본 한국인의 자연관

이종은,정민,윤주필,박용호,심경호,이기현 한양대학교 한국학연구소 1998 韓國學論集 Vol.32 No.-

Building a Community of Heritage Language Learners -‘Heritage Meets Heritage’ Project-

이종은 국제한국어교육학회 2019 한국어 교육 Vol.30 No.영문호

The identity of heritage speakers has been examined in great detail, but what happens when heritage language learners (HLLs) who speak different languages meet face-to-face to discuss matters of identity and language learning? There have been increasingly more language curricula attempt to meet the diversity of the learner’s needs. Do language curricula sufficiently reflect the learners’ perspectives? What can we do to better support and foster their learning? How do HLLs perceive their language and cultural identities, language uses, and affectivity? This article explores these questions through conversations between heritage learners across languages. This action research presents a collaborative project, Heritage Meets Heritage (HMH), in which college-level Korean and Spanish heritage learners discuss issues of identity, language uses, and affectivity toward their heritage language (HL) and culture (HC). The findings from this illustrate that Korean and Spanish HLLs share many self-perception aspects of HL and cultural identity, language use, and interactions with the HL community. Furthermore, the pedagogical implications of the study are also discussed.

브랜드 정보차별화를 위한 컴퓨터그래픽 디자인 방법 연구 : 멀티미디어상의 홈페이지 색채 이미지를 중심으로

이종은 커뮤니케이션디자인협회 시각디자인학회 1998 커뮤니케이션 디자인학연구 Vol.2 No.-

오늘날 정보사회의 도래와 함께 우리 주위에선 멀티미디어 기능을 가진 컴퓨터를 쉽게 접하게 되었다. 이러한 기능의 매체를 통하여 네트워크(Network)를 이용한 글로벌 마케팅(Global Marketing)이 주요한 현안으로 등장하고 있는 이때에 정보의 대부분을 시각을 통하여 받아들이는 인간의 형태(行態)에 맞도록 시각적 효과를 최대한 살릴 수 있게 하는 색채계획과 그 방법, 중요성을 알아본다. 그리고 기존의 여러 홈페이지를 그 예로 하여 브랜드 이미지의 폭넓은 체계화와 보다 나은 멀티미디어 환경을 만들고자 한다.

천연 고령토의 폐수 중 납 흡착에 관한 연구

이종은 한국환경보건학회 1995 한국환경보건학회지 Vol.21 No.3

Lead(II) removal efficiency by natural kaolinite was investigated through laboratory experiments. This study was conducted in two phases-sorption and desorption. In the adsorption study, the influence of sorption kinetics and sorption isotherm and various parameters such as pH, temperature, coexisting other heavy metal ions on the lead adsorption was investigated. And desorption study was carried out in order to find the re-usability of kaolinite as an adsorbent. The results of the study are as follows. 1. Sorption kinetics was investigated under the condition of 2.5 mg/l adsorbent concentration, pH 6.5$\pm$0.05, temperature $30\pm 0.5\circ$C, initial lead(II) concentration 25 mg/l. Adsorption rate was initially rapid and the extent of adsorption arrived at adsorption equilibrium with 73% adsorption efficiency in an hour. 2. The sorption isotherm experiment was made with different initial lead(II) concentration. A linearized Freundlich equation was used to fit the acquired experimental data. As a result, Freundlich constants, the sorption intensity (1/n) was 0.47 and the measure of sorption (k) was 2.44. So, it was concluded that sorption of lead(II) by kaolinite is effective. 3. The effect of pH on lead(II) sorption by kaolinite shows that at a pH of 3, only 6% of the total lead(II) was adsorbed and at a pH 9, 97% of the lead(II) was removed. And the effect of temperature on lead(II) sorption by kaolinite shows that as the temperature increased, the amount of lead(II) sorption per unit weight of kaolinite increased. But the effect was minor (p<0.05). 4. Sorption isotherm of lead coexisting cadmium (II) or zinc (II) was lower than that of lead itself. It was caused by the result of competitive sorption to adsorption site. And there was no difference between the sorption isotherm of cadmium and zinc. 5. In desorption studies, only 5.12% desorption took place in distilled water, while 52.08% in 0.1 N hydrochloric acid. Consequently used kaolinite could be regenerated by hydrochoric acid.

흰쥐 수뇌의 퓨트리신 분포에 관한 전자현미경을 이용한 면역세포화학적 연구

이종은,박경아,이승관,조영동 대한해부학회 1991 Anatomy & Cell Biology Vol.24 No.4

가묘악하선(家猫顎下腺)에 있어서 고색신경(鼓索神經) 및 경부교감신경자극(頸部交感神經刺戟)이 타액분필(唾液分泌) 및 배설관내압(排泄管內壓)에 미치는 영향(影響)

이종은,Lee, Jong-Eun 대한생리학회 1977 대한생리학회지 Vol.11 No.2

In Nembutal anesthetized cats, the sobmaxillary duct was cannulated with polyethylene tube, and effects of stimulation of the chorda tympani and cervical sympathetics on, the submaxillary secretion and intraluminal pressure of the submaxillary duct were observed. The stimulation of tile chorda tympani elicited a profuse salivary secretion. The stimulation of the cervical sympathetics evoked only a scanty flow, and on repeated stimulation of the nerve salivary flow response gradually diminished and finally the flow ceased. In this state the salivary flow by the sympathetic stimulation was resumed after the stimulation of the chorda tympani. Atropine abolished these responses to nerve stimulation. Intraluminal pressure of the submaxillary duct was abruptly increased and remained on a plateau during the stimulation of the chorda tympani, whereas sympathetic stimulation elicited moderate increase of the intraluminal pressure which did not remain in spite of continued stimulation. These results suggest that scanty salivary flow induced by cervical sympathetic stimulation is not real secretion but simple elimination of the saliva already present in the duct due to contraction of the contractile elements known to exist in the duct wall.

Nifedipine Enhances Vasodepressor and Natriuretic Responses to Atrial Natriuretic Peptide in Anesthetized Rats

이종은,최기철,Lee, Jong-Eun,Choi, Ki-Chul The Korean Physiological Society 1990 대한생리학회지 Vol.24 No.1

Pentobarbital 마취한 정상혈압 및 신성 고혈압 흰쥐에서 calcium channel 봉쇄 약물 nifedipine과 atrial natriuretic peptide(ANP)의 상호작용을 조사하였다. 정상혈압 흰쥐에서 nifedipine$(1.0\;{\mu}g/kg/min)$ 또는 ANP(60 ng/kg/min)의 주입은 각각 유의하게 혈압을 내렸으며 두 약물의 동시 주입시에 개별적으로 주입하였을 때보다 그 혈압내림의 정도가 더욱 컸다. Nifedipine은 단독 주입하였을 때에 신기능에 유의한 영향을 미치지 않았으나 ANP와 동시에 주입하였을 때에는 ANP의 요량 및 Na 배설 증가 효과를 항진시켰다. 한편 고혈압 흰쥐에서도 ANP의 혈압내림효과와 신장효과는 nifedipine과 함께 주입하였을 때에 더 컸다. 적출 흉부대동맥 표본을 phenylephrine으로 미리 수축시킨 후 ANP를 첨가하면 용량의존 이완반응을 보였고 nifedipine 존재하에서 더 예민하였다. 이상의 실험결과는 calcium channel 봉쇄약물이 ANP의 혈압내림효과를 항진시킴을 보인 것이며 그 기전으로 요중 배설 증가 및 혈관이완효과 증가 등이 관여함을 시사하였다. The interaction between a calcium channel blocker nifedipine and atrial natriuretic peptide (ANP) was examined in normotensive and renal hypertensive rats. The infusion of either ANP or nifedipine produced a significant decrease in mean arterial pressure (MAP). The combined infusion of ANP with nifedipine resulted in a greater fall of MAP than did the infusion of each drug alone. ANP significantly increased urinary volume and excretion of sodium, while nifedipine was without effects. The diuretic/natriuretic effects of ANP were potentiated by the combined infusion with nifedipine. The vasodepressor and renal effects of ANP or nifedipine were qualitatively similar between the normotensive and hypertensive rats. Nifedipine caused an upward and leftward shift of the ANP dose-relaxation curve of the phenylephrine-precontracted thoracic aortic rings isolated from the normotensive rats , suggesting that the vasodilation sensitivity to ANP is increased in the presence of nifedipine. These results indicate that nifedipine enhances the vasodepressor effect of ANP, the likely mechanisms being attributable to a contraction of effective intravascular volume as a consequence of potentiated renal excretion and a greater peripheral vasodilation.