머신러닝 기반 고강도 아연도금강판 CMT 용접부의 단면비드 형상인자 모델링

조윤희(Yun-Hee Jo),김경학(Kyung-Hak Kim),방희선(Hee-Seon Bang) 대한용접·접합학회 2021 대한용접학회 특별강연 및 학술발표대회 개요집 Vol.2021 No.11

자동차 부품의 부식 문제가 대두됨에 따라 아연도금강의 적용이 늘어나고, 아연의 기화점과 강판의 용융점 차이로 인해 스패터, 기공과 같은 결함이 발생한다. 이는 이음부 강도 저하의 주된 원인으로 용접성을 크게 저하시키므로 개선되어야 하는 부분이다. 본 연구에서는 아연도금강판의 기공 저감을 위해 와이어 제어를 통한 단락이행으로 저입열 공정이 가능한 CMT(Cold Metal Transfer) 용접공정의 공정변수를 188J/mm~544J/mm 범위의 다양한 열 입력을 통해서 용융부를 제어하고자 하였다. 또한, 용접실험 데이터를 기반으로 단면비드 형상인자를 모델링하기 위해 기계 학습을 수행하였으며, 형상인자 모델링에는 7대 지표(비드폭, 윗각장길이, 목두께, 밑각장길이, 용입깊이, 덧살높이, 토우각)를 선정하였다. 실험결과, 453J/mm의 입열량이 가장 기공저감에 적절한 것으로 확인되었으며, 형상인자 모델링 결과, 용입깊이와 밑각장길이, 비드폭, 토우각이 실측값과 거의 일치하였다.

대구시 동성로 보행자 전용도로의 이용자 만족도 평가

조윤희(Jo Yun-Hee),김주현(Kim Joo-Hyun),하재명(Ha Jae-Myung) 대한건축학회 2009 대한건축학회논문집 Vol.25 No.6

There has been no evaluation study on working environment of Dongsung Street since the initiation of pedestrian zone in Daegu. The projects have not been assessed appropriately by evaluating the questions whether it achieves the project’s objective, and whether the visitors are satisfied or not. Thus this study tries to assess Dongsung Street project by estimating the user satisfaction of the pedestrian mall. As a result of the analysis, pedestrians seem to be generally satisfied with a pedestrian mall on Dongsung street. Pedestrians are satisfied with the enforcement of the commercial function while they are dissatisfied with accessibility. In the result of satisfaction analysis through multiple regression analysis, 'connecting the street to both department store and market' for the enforcement of the commercial function, 'the image of Dongsung street that pedestrians want to walk in' for local characteristics, and 'a number of bus stop' and 'a number of parking lot' for accessibility, significantly affect the satisfaction. We expect that this study could be utilized as a basic material to the other projects which are revitalization project of the city and public design improvement project of Dongsung Street.

중등도 이상의 위험 수술을 받은 환자에서 수술 전후 항혈전제 약물 사용 평가

이현아,조윤희,조윤숙,한현주,이주연,정근화,이상건,Lee, Hyeon-Ah,Jo, Yun Hee,Cho, Yoonsook,Hahn, Hyeon Joo,Lee, Ju-Yeun,Jung, Keun-Hwa,Lee, Sang Kun 한국임상약학회 2017 한국임상약학회지 Vol.27 No.1

Objective: The perioperative management of antithrombotic therapy is often challenging and it requires a fine balance between the risk of hemorrhage and thrombosis. We aimed to evaluate the antithrombotic management for moderate to high risk patients in real world setting. Methods: Among the patients who were consulted to the neurologist for the evaluation of perioperative risk from 2010 to 2012, patients undergoing moderate to high risk surgery and taking antithrombotics within 30 days were identified. We analyzed the timing of discontinuation and reinitiation of antithrombotic drugs before or after surgery as well as the status of bridging therapy. In addition, the conformity with the guideline suggested by American College of Chest Physicians was assessed. The rate of thromboembolic event and major hemorrhage were also investigated. Results: A total of 329 patients were included. The concordance rate of warfarin stop and restart time with guideline was 23.4% and 10.3%, respectively. Continuing aspirin in patients undergoing coronary artery bypass surgery or non-cardiac surgery in patients with high risk for cardiovascular events were 59.2% and 2.6%, respectively. Bridging therapy was adopted in 92.9% and 81.2% in patients who had received anticoagulant before surgery and who were at high and low risk thromboembolism, respectively. In entire cohorts, 30-day incidence of major bleeding and thromboembolic event were 31.9% and 3.0%. Co-morbid renal disease were shown as independent predictor for major bleeding (adjusted OR 2.65. 95% CI 1.33-5.28). Conclusion: The concordance rate with guideline regarding perioperative antithrombotic use was low and bridging therapy was prevalent in patients undergoing moderate to high risk surgery.

정맥영양의 조제와 감염관리

최지형 ( Ji Hyeong Choe ),백진희 ( Jin Hee Baek ),조윤희 ( Yun Hee Jo ),조윤숙 ( Yoon Sook Cho ) 한국정맥경장영양학회 2018 한국정맥경장영양학회지 Vol.10 No.2

Recently, in Korea, the importance of preparation and use of injectable drugs has been emphasized due to successive fatal accidents caused by injection infections. Parenteral nutrition (PN) has also been identified as a cause of infection. Cases of infection due to PN have been reported not only in Korea, but also abroad, and contamination occurs mainly during the preparation of PN. Because sterile preparation and compounding of injections are very important for infection control and patient safety, this article reviews the major guidelines outlined thus far. The Korea Ministry of Food and Drug Safety in 2006 published guidelines and the KSHP (Korean Society of Health-System Pharmacists) recently issued guidelines for the aseptic preparation of injections. In addition, as US guidelines, the ASHP (American Society of Health-System Pharmacists) guidelines and United States Pharmacopeia (USP) <797> are also reviewed. The recent guidelines published by the KSHP have significance in that they were adopted in accordance with the domestic reality, even though they conform to foreign guidelines, and are expected to be guidelines for hospital pharmacists performing aseptic preparation work. In addition, the Korea Ministry of Health and Welfare is considering appropriate guidelines for the safe management of medications, training staff for infection prevention and strengthening staff capacity. Furthermore, the gradual expansion of aseptic compounding facilities and human resources, as well as the provision of adequate medical costs are also considered. Based on the establishment and standardization of injectable drugs compounding guidelines for Korean hospitals, it is believed that if human resources and facilities are supported and medical charges are improved, it will be possible to expect the safer preparation and use of injections.

도로변 방음대책 수립시 합리적인 소음규정 적용에 대한 연구

손정곤(Jung-Gon Son),김정태(Jeung-Tae Kim),조윤희(Yun-Hee Jo) 한국소음진동공학회 2011 한국소음진동공학회 학술대회논문집 Vol.2011 No.10

The road traffic noise has emerged major noise as the overcrowding of the urban population and the explosion of car storage capacity. There are limits for establishing the measures to meet noise standard because of the increase of high-rise building and insufficient distance between residential areas and road in urban center areas. Therefore, this study analyze the problem of the application of national road noise standard, and present the alternatives to achieve environmental standards in conjunction with the soundproofing measures. To reduce the population ratio exposed to road noise on seoul motorway, we suggest some action plane are as follows: ⅰ) Roadside noise standard of nighttime beside daytime is the first noise reduction goals ⅱ) Noise standard of Noise and vibration control act is priority in case of existing area ⅲ) Noise standard of basic environmental policy act is priority in case of new area.

국내 지역사회/일차의료 고위험의약품 목록 도출

이수현(Suhyun Lee),아영미(Young-Mi Ah),허규남(Kyu Nam Heo),이아영(Ah Young Lee),민상일(Sang il Min),김아정(A Jeong Kim),김성환(Sung Hwan Kim),조윤희(Yun Hee Jo),조윤숙(Yoon-Sook Cho),한지민(Ji Min Han),이주연(Ju-Yeun Lee) 대한약학회 2022 약학회지 Vol.66 No.5

Despite the fact that a considerable number of preventable adverse events are managed in primary care settings, medication-related risks have been evaluated mainly through hospital admissions. While interest in high-alert medication management in the community and primary care settings is increasing internationally, Korea does not have accreditation for the same and lacks established standards for high-alert medications. Therefore, this study aimed to develop a nationallevel list of high-alert medications for community and primary care. The candidates for the high-alert medication list included medications recommended by Institute for Safe Medication Practices and those suggested by each guideline of the World Health Organization, Japan and Korea. We analyzed the adverse events related to medication errors reported by the patients' safety reporting system. Seven experts working in the community and primary care settings evaluated the adequacy and priority of the candidate medications. The final list included 20 high-alert medications, including nine essential and eleven optional medications. The national-level list of high-alert medications which we developed may be useful in formulating accreditation guidelines or treatment standards for community and primary care patients.