세공분포모델을 이용한 CuO/γ - Al2O3 와 아황산가스의 반응성 연구

박찬영,정수현,김동찬,조종현 한국화학공학회 1990 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.28 No.2

구형의 γ-A1₂O₃에 산화동을 담지시킨 후 반응조건에 따라 아황산가스와 반응 흡착시켰다. 각 조건에서 산화동의 전화율을 측정하고 세공분포모델을 이용하여 CuO/γ-A1₂O₃와 아황산가스의 반응 흡착거동을 비교 분석하였다. 그 결과 초기 표면반응속도는 담지농도에 따라 변하지만 활성화에너지는 14.49kJ/㏖로 거의 일정하였으며 입자레이놀즈 수는 최종 전화율에 영향을 미치지 않았다. 또한 표면확산계수의 활성화에너지 값은 D_(es1) =1.82KJ/㏖, D_(es2), D_(es3)=5.37KJ/㏖로 세공영역에 따라 다르게 나타났다. 세공분포모델을 이용하여 산출한 전화율은 여러 반응조건에서 실험치에 근접하였으나 아황산가스 농도가 2,000ppm에서 3,000ppm으로 증가할 떼와 담지농도가 6wt%에서 8wt%로 증가할 때는 평형전화 상태에서 차이를 보였다. 최적 반응온도인 450℃ 이내에서는 실험치에 접근하였으나 그 이상의 온도범위에서는 큰 차이를 보였다. 반응온도 450℃, 담지농도 6wt%, 아황산가스 농도 2,000ppm에서 실제의 전화율은 63%로 최대치를 보였다. After impregnating copper oxide by using a spherical γ-A1₂O₃, CuO/γ-A1₂O₃ reacted with and/or adsorbed the sulfur dioxide on reaction conditions. Conversion of copper oxide was estimated under each condition and then the reaction and adsorption behavior between CuO/γ-A1₂O₃ and sulfur dioxide were analytically compared by using the distributed pore size model. From the results, it was shown that although the initial surface reaction rates varied with the impregnation concentration, the activation energy was constant as about 14.49KJ/㏖, and that the final conversion of CuO/γ-A1₂O₃ was not affected by the particle Reynolds number. Also the values of activation energy of surface diffusion coefficients were shown to be D_(es1) =5.39 KJ/㏖ and D_(es2), D_(es3) = 5.39 KJ/㏖ depending on the pore size region. Although conversion rates acquired by the analysis of distributed pore size model were close to the experimental values under most of reaction conditions, there were considerable deviations in the final conversion when the sulfur dioxide concentration changed from 2,000 to 3,000 ppm and the impregnation concentration increased from 6 to 8 wt%. Also below the optimum temperature of 450℃ the conversion rates based on the model were close to the experimental value, but over 450℃, there were considerable deviations between the two values. The maximum experimental conversion was shown to be 63% at 450℃ with 2.000 ppm of SO₂ on 6 wt% CuO/γ-A1₂O₃.

과학기술의 두 얼굴 - 자연을 지키는 과학기술 이뤄야

박찬영,Park, Chan-Yeong 한국과학기술단체총연합회 2000 과학과 기술 Vol.33 No.8

Ultrasonographic Findings of Epipericardial Fat Necrosis: A Case Report

박찬영,황혜전,이관섭,이인재,박경하 대한영상의학회 2016 대한영상의학회지 Vol.74 No.4

Epipericardial fat necrosis (EFN) is an infrequent cause of acute chest pain. In rare cases like these, conservative treatment is necessary. Clinically, EFN may mimic emergent cardiopulmonary conditions, such as acute myocardial infarction. Computed tomography (CT) and magnetic resonance imaging characteristics of EFN is well described as encapsulated fatty lesion with perilesional soft tissue strands and thickening of adjacent pericardium in the epipericardial area. For confirmation of the diagnosis, involution of this lesion on follow-up is important. We present a case of EFN observed with ultrasonography (USG). This lesion was shown as a well-defined ovoid shaped mass with heterogeneous echogenicity in the left side of cardiophrenic space on USG. There was no color flow on Doppler USG. Follow-up USG and CT revealed decrease in the size of the lesion.

교원자격증 유무에 따른 특수교육 보조원의 지원, 역할, 갈등 그리고 직무 만족도에 대한 인식 연구

박찬영,최성규 한국재활심리학회 2011 재활심리연구 Vol.18 No.2

본 연구는 특수교육 보조원의 지원, 역할, 갈등 그리고 직무 만족도에 대하여 교원 자격증 유무에 따라 어떠한 차이가 있는지 알아보기 위한 것으로 교원자격증을 가진 3명의 보조원(2명의 특수교사 자격소지자, 1명의 일반교사 자격소지자) 그리고 교원자격증이 없는 4명의 보조원을 대상으로 면담을 통한 질적연구를 실시하였다. 연구결과를 살펴보면 첫째, 교원자격증을 소지한 특수교육 보조원은 특수아동을 가르치는 방법에 대한 선행지식이 있으며, 역할의 모호함에서 오는 담임교사 또는 관리자와의 갈등을 보였다. 그리고 제한된 보조원의 역할과 평생직업으로써가 아닌 미래 교사가 될 것이라는 태도로 직무만족도가 낮았다. 둘째, 교원자격증이 없는 특수교육 보조원들은 장애아동에 대한 선행지식 없이 단순히 생계를 위해 직업을 선택했다. 그리고 같이 일하는 관리자와 교사, 부모, 다른 보조원들 모두에게서 갈등을 느꼈고, 그들은 장애아동에 대한 지도능력이 충분하지 않지만 자신의 직업에 대한 만족도는 높았다. 그러므로 본 연구의 결론은 특수교육 보조원에 대한 제도적인 개선과 함께 장애아동에 대한 지식과 기술이 부족한 보조원들에게 사전훈련프로그램이 제공되어야 한다.

커뮤니티웰빙에 영향을 미치는 정치적 특성에 관한 연구

박찬영,오영균 서울행정학회 2018 서울행정학회 학술대회 발표논문집 Vol.2018 No.11

어린이 철학: 도덕교육의 새로운 접근

박찬영 한국초등도덕교육학회 2003 초등도덕교육 Vol.11 No.-

『황제내경(黃帝內經)』에 나타난 일월성진(日月星辰)에 관(關)한 연구(硏究)

박찬영,김기욱,박현국,Park, Chan-Yeong,Kim, Gi-Uk,Park, Hyeon-Guk 동국대학교 한의학연구소 1996 東國韓醫學硏究所論文集 Vol.5 No.-

A study on the effect of the Sun-Moon-Stars(日月星辰) in Huang Ti Nei Ching("黃帝內經") on the formation of the Yunqi theory(運氣理論) have revealed following conclusions. 1. There was a record of Stars(星辰) written by Gabgol-Character(甲骨文字) in the Yin(殷) Dynasty. But the very first documentary records of Stars(星辰) is Shu Jing("書經"). Ancient astronomy had the tendency of astrology of combined with theory of the Five Elements(五行) and finally effects the theory of formation of Huang Ti Nei Ching("黃帝內經"). 2. Shu Jing("書經") said that Junrak(錢樂) made an Armillary sphere(運天儀) in the Sung(宋) Dynasty. And in the Jin(秦) and the Han(漢) Dynasty, they already observed the stars. The Sunkiokhyung(璿機玉衡) which is machinery of star-observing, became to be called an Armillary sphere (運天儀) by the pass of times. 3. As of the theory of the Cosmos-structure(宇宙-構造論) in Ohanunhangdaeron("五運行大論"), Guiyugu(鬼兒區) announced the Hypothesis of Covering Heaven(蓋天說) but Kibak(岐伯) supported the Hypothesis of chaosheven's(蓋天說) and in the theory of atmosphere(大氣論) in Ohanunhangdaeron("五運行大論") said that the earth was in Great Empty(太虛) and it was floating in the universe by the Great Chi(大氣). 4. The knowledge about the Five stars(五星) in Huang Ti Nei Ching("黃帝內經") is presented in the section of Gemgwejineonron("金?眞言論"), Gigoupyondaeron("氣交變大論"), Youkwonjeonggidaeron("六元正紀大論").ln the method of identifying the Five stars(五星) presented the criteria of the brightness, the altitude, the colours and the orbit etc. 5. The jupiter which has twelve year's revolution cycle was the basis of determination on the Twelve constellation(12辰), the Twelve field of heaven(12次), the Twelve Houses in the ecliptic(黃道 12宮), the Twelve Earth's Branches(12支) and the Twelve fields of Earth(12分野) and also it became the origin of the duodecimals(12進法). 6. The saturn having about twenty-eight year's revolution cycle became the criterion in identifying the Twenty Eight Constellations(28宿) which was used as the coordinates of the Celestial sphere (天球). 7. By the Percussional movement(歲差運動), the position of polaris and the Vernal-Antumal equinox(春秋分点) were shifted. Therefore the ancient the Heaven Gate-Earth Door(天門-地戶) changed from the position of Sil-Byuk(室壁), Yik-Jin(翼軫). And the precisional movements brought about the concept of the WunHoyYunSe(元會運世) that is a method of dividing a period. Also the precisional movement gave three dimension(三次元) foundation interpreted the Sixty JiaZi (六十甲子) which is revolving through sixty years uniformally. 8. The Hypothesis of the Nine Houses and Eight Winds(九宮八風論) which is one field of the astrology of ancient polaris-nine Houses divination plate(太一九宮占盤) brought about the concept of deficiency and excess and the concept of the Wind Vice(風邪). In the Calendar System(曆法) presented in Huang Ti Nei Ching("黃帝內經") the tropical year of the Sun-Moon-Stars(日月星辰) and the revolution and the rotation of the earth give explanations the changes of Yin-Yang(陰陽) by the use of the ten Celestial branches(十干) and the twelve Earth branches(十二支).

영구거푸집으로 활용한 탄소섬유 FRP 판과 DFRCC 사이의 부착응력에 관한 실험적 연구

박찬영,유승운,Park, Chan-Young,Yoo, Seung-Woon 대한토목학회 2014 대한토목학회논문집 Vol.34 No.6

최근 들어 탄소섬유 FRP가 보수/보강재로 많이 활용되고 있다. 본 연구에서는 탄소섬유 FRP 판을 영구 거푸집으로 활용하여 새로운 콘크리트 교량 바닥판 시스템을 개발하기 위하여 CFRP판과 고인성 섬유보강 콘크리트 사이의 부착성능에 대한 평가를 실시하였다. 현장타설 콘크리트와 CFRP 간에 부착을 높이기 위하여 시중에 유통되는 에폭시를 사용하여 규사를 부착하였다. 일반콘크리트의 부착응력은 2.11~5.43MPa으로 나타났고, 고인성 섬유보강 콘크리트인 DC1 (RF4000)과 DC2 (PP)의 부착응력은 각각 3.91~5.60MPa, 2.92~5.21MPa이며, DC3 (RF4000+RSC15)의 부착응력은 4.80~5.58MPa, DC4 (PP+RSC15)의 평균 부착응력은 5.57~5.89MPa으로 나타났다. Recently FRP of carbon fibers is utilized as a repairing and reinforcing material for concrete structures. In this study, the bond performance between CFRP planks and ductile fiber reinforced cementitious composites was evaluated in order to develop a new system of concrete bridge deck to take advantage of the FRP planks of carbon fiber using as a permanent formwork. In order to strengthen the bonding between the FRP and cast-in-place concrete, an epoxy resin circulated in the market generally was fitted with a silica sand. The bond stress of ordinary concrete appeared in 2.11~5.43MPa and the bond stress of ductile fiber reinforced cementitious composites DC1 (RF4000) and DC2 (PP) respectively were 3.91~5.60MPa, 2.92~5.21MPa and the average bond stress of DC3 (RF4000+RSC15) and DC4 (PP+RSC15) were 4.80~5.58MPa, 5.57~5.89MPa.

미세혈관문합술의 연습 모델로서 글리세롤 처리된 위대망동맥의 활용

박찬영,장학,정진행,허은주,민경원,유문원,양한광 대한성형외과학회 2008 Archives of Plastic Surgery Vol.35 No.5

Purpose: We investigate the possibility of vessel preservation with glycerol and evaluate the potential of preserved gastroepiploic artery as a tool for the microsurgical practice. Methods: In 5 early gastric cancer patients, IRB(No. C-0603-040-170), we gained gastroepiploic artery specimens(5 segments, about 10cm) after gastrectomy. Each segment was rinsed in a normal saline and subsequently placed in a bottle, containing 50mL anhydrous glycerol (87%). The bottles were refrigerated at 4℃, the longest preservation time being 5 months. Received May 13, 2008 Revised June 11, 2008 Accepted June 20, 2008 Address Correspondence: Hak Chang, M.D., Department of Plastic and Reconstructive Surgery, Seoul National University Hospital, 28 Yeongeon-dong, Jongno-gu, Seoul 110-744, Korea.Tel:02)2072-2375/Fax:02)3675-7792/E-mail: hchang@snu.ac.kr * 본 논문은 2007년 제63차 대한성형외과학회 추계학술대회에서 포스터 발표되었음. * 본 논문은 과학기술부/한국과학재단 우수 연구센터 육성사업의 지원으로 수행되었음(R11-2005-065). Results: At first glance, no fragmentation was detected and the surface of vessel seemed mild sclerotic. In histological examination, vascular structures remained intact though preservation with glycerol led to a mild atrophy of the smooth muscle in the tunica media. Especially, we found out the elastic fibers and endothelial lining of the intima were preserved until 5 months. Adequate status for using microsurgical practice was also maintained and leakage test was performed successfully with gentian violet ink. Conclusion: Based on the results obtained in this study, the gastroepiploic artery preservation with glycerol as a training model for microvascular anastomosis is a technically very simple procedure and useful for the novice microsurgeon.

Depression among Korean Adults with Type 2 Diabetes Mellitus: Ansan-Community-Based Epidemiological Study

박찬영,김소영,길종원,박민희,박종혁,김연정 질병관리본부 2015 Osong Public Health and Research Persptectives Vol.6 No.4

Objectives: There are an increasing number of studies being carried out on depression in patients with diabetes. Individuals with diabetes have been reported as having a higher prevalence of depression compared to those without diabetes. However, only a few studies involving Korean patients have been conducted. The aims of this study were to examine the prevalence of depression and to find various risk factors according to the degree of depression among Korean patients with Type 2 diabetes mellitus (T2DM). Methods: An Ansan-community-based epidemiological study was conducted from 2005 to 2012. The total number of participants in this study was 3,540, from which patients with diabetes (n = 753) have been selected. The presence of depression was evaluated using the Beck Depression Inventory total score. Results: The prevalence of depression was 28.8%. The mean age of participants was 55.5 ±8.2 years. We divided the participants into three groups (withoutdepression, moderate-depression, and severe-depression groups) to examine the depression prevalence among Korean T2DM patients. The unemployed participants had 2.40 [95% confidence interval (CI) 1.21-4.76], the low-income participants had 2.57 (95% CI 1.52-4.35), the participants using an oral diabetes medicine or insulin had 2.03 (95% CI 1.25-3.32), the participants who are currently smoking had 2.03 (95% CI 1.10-3.73), and those without regular exercise had 1.91 (95% CI 1.17-3.14) times higher odds of depression in the severedepression group, compared with the without-depression group. Conclusion: There was a significant association between depression prevalence and diabetes, and we found various risk factors according to the degree of depression in Korean patients with T2DM.