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시술자와 방습법에 따른 치면열구전색제의 유지에 관한 연구
조재용,김정욱,장기택,김종철,한세현,이상훈,Cho, Jae-Yong,Kim, Jung-Wook,Jang, Ki-Taeg,Kim, Chong-Chul,Hahn, Se-Hyun,Lee, Sang-Hoon 대한소아치과학회 2003 大韓小兒齒科學會誌 Vol.30 No.3
치면열구전색제의 예방효과는 전색제의 유지와 매우 밀접한 상관관계가 있으며 시술시의 환경과 시술 방법, 개개 환자의 구강 위생이 유지에 영향을 미치는 것으로 알려져 있다. 현재 우리나라에서는 대규모로 '치아홈메우기 사업'이 진행 중에 있지만 시술 여건이나 시술자에 따라 여러 가지 방법의 방습법과 치면 세마가 행해지고 있는 실정이다. 본 연구의 목적은 치면열구전색제의 시술 시 소아치과의사, 일반치과의사, 치과위생사 등 시술자에 따른 유지율 차이와 러버댐과 코튼롤(cotton roll) 방습법 등 격리 방법에 따른 유지율의 차이를 알아보고 실패가 일어나는 치아의 특정 부위를 알아보기 위한 것이다. 6세-11세인 119명의 아동(남자 64명, 여자 55명)에서 상하악 제1대구치에 시술된 279개의 치면열구전색제를 대상으로 1년 후의 유지율을 조사하였다. 이 아동들은 평균 연령이 $8.59{\pm}0.772$세였으며 각각 러버댐을 사용한 소아치과의사가 시술한 1군, 러버댐을 사용한 일반치과의사가 시술한 2군, 코튼롤(cotton roll)을 사용한 치과위생사가 시술한 3군으로 나누었다. 1년 후의 치면열구전색제의 유지율을 조사하여 다음과 같은 결론을 얻었다. 1. 1년 후의 치면열구전색제 유지율은 러버댐을 사용한 소아치과의사가 시술한 1군이 90.8%, 러버댐을 사용한 일반치과 의사가 시술한 2군은 85.0%, 코튼롤을 사용한 치과위생사가 시술한 3군은 64.7%였으며 1군과 2군간에는 통계적인 유의차가 없었으나(P>0.05) 1,2군과 3군 간에는 통계적인 유의차가 있었다(P<0.05). 2. 상악과 하악의 유지율 비교에서 1군과 2군은 차이가 없었으나(P>0.05) 3군은 차이가 있었다(P<0.05). 3. 실패부위 분석에서 교합면의 실패는 58.3%, 협/설면구는 41.7%를 차지하였다. Currently, 'National program of dental sealant' has begun in Korea, but various isolation techniques and preparation is performing. The aim of the present study was to compare pit and fissure sealant retention rates between different operators using two different isolation techniques. Additionally, the failed surface was examined. One examiner performed the examination after one year of the initial operation. The population consisted of 119 children(mean age $8.59{\pm}0.772$) of which the total sealed number was 279 permanent first molars. Pediatric dentists sealed 131 molars using the rubber dam isolation technique (Group 1), general practitioners sealed 80 molars using the rubber dam isolation technique (Group 2), and dental hygienists sealed 69 molars using the cotton roll isolation (Group 3). The results were as follows ; 1. The complete retention rate between Group 1 (90.8%) and 2 (85.0%) showed no significant statistical difference (P>0.05). However, there were significant statistical different retention rates between Group 1 and Group 3(64.7%) and between Group 2 and Group 3 (p<0.05). 2. In comparing retention rates between maxilla and mandible, Only Group 3 showed a significantly lower complete retention rate in mandible than maxilla (p<0.05). 3. In failed surface analysis, occlusal failed surface was 58.3%, buccal/palatal failed surface was 41.7%.
조재용,이근우,유현석,김영석,Cho, Jae-Yong,Lee, Kuen-Woo,Yoo, Hyun-Seok,Kim, Young-Suk 한국건설관리학회 2012 한국건설관리학회 논문집 Vol.13 No.4
서울시내 공동주택 가운데 사용연수가 15년을 초과하여 리모델링이 가능한 공동주택은 약 54.8만 세대로 서울시 공동주택의 42%에 달하고 있으며, 2015년까지 리모델링이 가능한 공동주택은 약 80만 세대에 달할 것으로 예상된다. 공동주택의 노후화를 개선하고 거주환경을 향상시키기 위한 유지보수 사업은 재건축 사업과 리모델링 사업으로 분류할 수 있다. 현재 정부의 재건축 규제로 인해 증축 리모델링이 공동주택의 유지 보수 사업의 대안으로써 주목받고 있으나 증축 리모델링을 추진하는 공동주택의 75%가 사업 초기단계에 머물러 있으며, 증축 리모델링 사업은 활성화되지 못하고 있는 실정이다. 따라서 본 연구에서는 증축 리모델링 전문가들을 대상으로 한 델파이 분석을 통해 증축 리모델링의 활성화를 저해하는 주요 요인과 영향도를 분석하고, 각각의 저해 요인을 해결하기 위한 방안을 제시하고자 한다. 548 thousand apartment houses of Seoul has been used over 15 years and remodeling is available. It is 42% of the overall apartment houses currently and it is assumed to increase to 800 thousand in 2015. The maintenance work is divided to reconstruction and remodeling. Due to the regulations of the government, expansion remodelling has been the most considered alternative. However, 75% of the extension remodelling, yet, are in the preliminary phases. Thus, this study suggests factors hampering the vitalization of extension remodelling and solutions for each factor by means of Delphi analysis method.
Escherichia coli에 대한 한약재추출물의 항균활성
조재용,최일,황의경,Cho, Jae-yong,Choi, Il,Hwang, Eui-kyung 대한수의학회 2003 大韓獸醫學會誌 Vol.43 No.4
The extracts from 40 different traditional medicinal herbs were used to investigate the antimicrobial activities against Escherichia coli. Among them, the extracts from Paeonia suffruticosa (PS), Siegesbeckia orientalis (SO), Schizandra chinensis (SC), Caesalpinia sappan (CS) and Rhus javanica (RJ) exhibited high antimicrobial activities against E. coli, Minimum inhibitory concentrations (MIC) of the RJ extract against E. coli were 0.8 mg/ml. After heating treatment of these extracts, the antimicrobial activities against E. coli were significantly reduced in case of the CS extract. After alkaline or acid treatment of these extracts, the antimicrobial activities against E. coli were significantly increased in the PS extract but reduced in both SO and RJ extract. Since extracts from RJ and CS exhibited the highest antimicrobial activities, bacterial growth-inhibiting activities against E. coli by these two extracts were further examined. Optical density at 620 nm after 24 hours incubation of E. coli in the presence of 100, 300 or 500 ppm of RJ extract ranged from 0.1 to 0.2 compared to 0.35~0.65 in the absence of RJ extract, indicating that growth of E. coli was significantly inhibited within 24 hours by the addition of at least 100 ppm of RJ extract. Optical density at 620 nm after 24 hours incubation of E. coli in the presence of 300 or 500 ppm of CS extract ranged from 0.01 to 0.25 compared to 0.5~0.55 in the absence of CS extract, indicating that growth of E. coli was also significantly inhibited within 24 hours by the addition of at least 300 ppm of CS extract. In conclusion, these findings suggest that extracts from RJ and CS may play important roles for antimicrobial activities against E. coli causing various animal diseases.
3PL 물류정보시스템의 효과성에 관한 실증적 연구 : 화주기업의 공급사슬성과와 장기지향적관계성의 역할을 중심으로
조재용,Cho, Jae-yong 한국벤처혁신학회 2020 벤처혁신연구 Vol.3 No.2
Recently, in the process of globalization of companies, the use of third party logistics providers (3PL) has been strengthened. Therefore, the purpose of this study is to test the effectiveness of the logistics information system provided by 3PL companies. This study is to test the relationship between the effect of the characteristics of the 3PL logistics information system on the shipper's supply chain performance, that is, logistics performance, customer performance, and organizational performance, and the shipper's loyalty to the 3PL company, that is, 3PL corporate performance. In addition, long-term relationship orientation is to test whether there is a moderating effect between the shipper company and the 3PL company. Through this, this study aims to provide strategic implications for improving the competitiveness of 3PL companies. In this study, a total 205 data were collected and used for analysis of shippers companies for hypothesis testing, and analyzed using SPSS 21.0 and AMOS 21.0 statistical programs. The results of the study are summarized as follows. First, it was found that the accuracy, timeliness, and usefulness of the 3PL logistics information system all had a significant positive (+) effect on the performance of the shipper's supply chain. Second, it was found that the accuracy, timeliness, and usefulness of the 3PL logistics information system all had a significant positive (+) effect on 3PL corporate performance. Third, it was found that the performance of the supply chain of the shipper company had a significant positive (+) effect on the performance of the 3PL company. Finally, it was found that long-term relationship orientation had a moderating effect on the relationship between the performance of the shipper company's supply chain and the performance of the 3PL company. The purpose of this study is to provide academic and practical implications for securing competitive advantage through the logistics information system of 3PL logistics companies.
가속도 계측데이터를 사용하는 이동하중식 별 알고리즘의 개발
조재용 ( Cho Jae Yong ),최광규 ( Choi Kwang-kyu ),신수봉 ( Shin Soobong ) 한국구조물진단유지관리공학회 2006 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.10 No.1
An algorithm is proposed for estimating axle loads of trucks moving over a bridge by using measured acceleration data. The bridge was modeled by a beam structure in the applications of the proposed algorithm. Mass and stiffness matrices were assumed as obtained by applying a system identification method. The algorithm was examined through laboratory experiments.