MIRACL을 활용한 인증 및 키 합의 프로토콜의 효율성 분석

조영재(Cho Yeong Jae),오지현(Oh Ji Hyeon),손승환(Son Seung Hwan),김명현(Kim Myeong Hyun),이준영(Lee Joon Young),박영호(Park Young Ho) 한국통신학회 2021 한국통신학회 학술대회논문집 Vol.2021 No.6

최근 정보를 저장하고 통신하는 기기의 범위가 확대됨에 따라 제한된 연산자원을 가진 기기에도 적용할 수 있는 효율적인 인증 및 키 합의 프로토콜에 관한 연구가 활발히 진행되고 있다. 본 논문에서는 공개소스 암호화 라이브러리인 MIRACL(Multi-precision Integer and Rational Arithmetic Cryptographic Library)을 사용해 2020년에 제안된 Yu 등과 Lee 등의 인증 및 키 합의 프로토콜의 실행 시간을 측정하여 각각 유사한 환경의 논문들과 비교분석한다.

불안정형 관동맥질환 환자에서 주요 심혈관 사건의 예측 인자로서의 심근 Troponin 1 및 Myoglobin 에 관한 연구

허재웅(Jae Woong Hur),김경현(Kyung Hyun Kim),하영준(Young Jun Ha),박찬수(Chan Su Park),서우종(Woo Jong Seo),조영재(Yeong Jae Cho),차경우(Keung Woo Cha),남시현(Si Hyun Nam),김종연(Jong Yeon Kim) 대한내과학회 2001 대한내과학회지 Vol.61 No.5

N/A Background: Patients with unstable angina or non Q wave myocardial infarction still have an elevated risk for subsequent cardiac events. Therefore early assessment of the risk of future cardiac events is important. In this study, prognostic value of troponin I and myoglobin was evaluated and compared with other known early available risk indicators. Methods: Serum troponin I and myoglobin were measured at presentation and 8 hours, 16 hours, and 24 hours thereafter in 126 patients with unstable angina (n=70) or non Q myocardial infarction (n=56) from Jan 1998, through Feb 2000. Echocardiography was performed with calculation of wall motion score index. The incidence of cardiac death or myocardial infarction was compared between patients with normal troponin I, myoglobin and abnormal ones, respectively. Results: (1) At 6 months, 1 death (2.2%) and 1 myocardial infarction (2.2%) occurred in the 45 unstable angina patient s with normal troponin I compared with 3 deaths (12.0%) and 8 myocardial infarctions (32.0%) in the 25 unstable angina patient s with elevated troponin I. (2) At 6 months, 1 death (1.7%) and 3 myocardial infarctions (5.2%) occurred in the 58 unstable angina patients with normal myoglobin compared with 3 deaths (25.0%) and 6 myocardial infarctions (50.0%) in the 12 unstable angina patient s with elevated myoglobin. (3) When the analysis was limited to patients with normal baseline troponin I (≤0.4 ng/ dl: n=45), increased myoglobin level remained significantly associated with increased incidence of cardiac deaths or myocardial infarction compared with normal myoglobin level (16.7% vs 0%). (4) Together with age, diabetes, wall motion score index, troponin I and myoglobin levels were identified as independent prognostic variables for myocardial infarction or cardiac death in a multivariate logistic regression analysis. (5) The maximal troponin I and myoglobin value obtained during the first 24 hours provides independent and import ant prognostic information regardless of whether the patient is classified as having unstable angina or non Q wave myocardial infarction. Conclusion: The maximum troponin I and myoglobin obtained during the first 24 hours provides independent and important prognostic information in patients with unstable angina or non Q wave myocardial infarction. (Korean J Med 61:496- 505, 2001)

중소 노후 콘크리트교의 실증기반 성능저하 평가기술 개발

조재열(Cho, Jae-Yeol),이주형(Lee, Joo Hyung),김민영(Kim, Min Yeong),조영재(Jo, Young Jae),김지상(Kim, Jee Sang) 대한토목학회 2017 대한토목학회 학술대회 Vol.2017 No.10

저출산이 자녀교육에 미치는 파급효과- 자녀교육 관여 수준과 학업성취도에 미치는 영향 -

반상진(Ban Sang-Jin),조영재(Cho, Young-Jae),정성석(Chung, Sung-Suk),여영기(Yeo, Yeong-Gi) 한국교육행정학회 2014 敎育行政學硏究 Vol.32 No.4

이 연구는 저출산이 가정교육에 미치는 파급효과를 규명하기 위해 한 자녀 가구와 세 자녀 이상 가구의 가정배경이 자녀교육관여(관심·실천·상담) 수준과 자녀의 학업성취도에 미치는 영향을 분석했다. 연구결과, 자녀 수 통합모델에서 첫째, 가정배경은 자녀교육에 대한 관심과 실천 및 상담에 영향을 주었다. 둘째, 부모의 자녀교육관심은 교육실천과 상담에 영향을 주었 다. 셋째, 자녀교육실천과 상담은 자녀의 학업성취도에 영향을 주었다. 그리고 넷째, 한 자녀 가구와 세 자녀 이상 가구를 구분한 다중집단분석 결과 가정배경이 부모의 자녀교육관심과 실천에 미치는 직접적인 영향력의 차이가 없었다. 그러나 한 자녀 가구의 부모는 가정에서 세 자녀 이상 가구의 부모보다 자녀교육관심을 교육적으로 실천할 가능성이 크게 나타났다. 이 연구의 시사점은 한 가구의 자녀 수가 감소해도 부모의 자녀교육에 대한 관심의 변화는 크지 않으나 그 관심이 가정에서 부모의 교육실천으로 발현될 가능성에는 영향을 준다는 데 있다. 자녀 수에 따라 부모의 자녀교육관심이 실천으로 전이될 가능성에 차이가 있다는 점은 저출산의 교육적 파급효과로서 새롭게 주목할 부분으로 판단된다. The primary purpose of this study was to analyze the ripple effects of low birthrate on children’s education at home. To attain the purpose, this study analyzed the effects of parent involvement(interest, practice, counseling) on their children's academic achievement according to the numbers of children at home. The data were taken from the profile supplied by The Korean Education and Employment Panel Survey. The sample was composed of 208 parents with a single child and 532 parents with over 3 children. This study employed the Structural Equation Model as a major statistical technique. The results of this study were as followings. First, parent background had an effect to their interest, practice, and counseling with children's education. Second, it was likely that the parent interest was transferred to their educational practice at home. Third, in terms of low-birthrate, remarkable results were obtained that standardized path coefficients from parent background to parental involvement had no statistical differences between a single child parent and over-three children parent. However, it was seen that the possibility of a single child parent's interest leading to educational practice was higher than over-three children parent's. In relation to low-birthrate, these results have implications. First, the level of parents' interest to children's education does not easily change, although the number of children decrease. Second, low-birthrate is likely to be a ripple effect to the parent involvement by creating a different influence of the path from parents' educational interest to parents' behavior at home.

농촌생활서비스 충족도 분석 연구: 충청남도 홍성군을 사례지역으로

한승석 ( Seung-seok Han ),조영재 ( Young-jae Cho ),정환영 ( Hwan-yeong Jeong ) 한국도시지리학회 2021 한국도시지리학회지 Vol.24 No.2

농림축산식품부에서 시행하는 사업 중 일반농산어촌개발사업의 읍면중심지 사업을 위해 중심지 계층분석이 이루어진다. 이는 도시의 계층구조를 분석하는 것으로 읍면의 중심성이 어느 정도 수준인지를 파악하기 효율적인 방법이라 할 수는 있다. 하지만, 중심성 분석은 실제 농촌공간에 거주하고 있는 주민이 보편적으로 누려야 하는 생활서비스와는 차이를 보이는 요소들을 내포하고 있는 것이 현실이다. 이에 본 연구를 통해 농촌공간 분석방법을 농촌생활서비스의 중요도를 바탕으로 분석하는 방법을 제시하였다. 중심성의 개념이 아닌 농촌생활서비스의 충족도 개념으로 접근한 농촌생활서비스 활용 분석 방법으로 중심지 계층분석과 농촌생활서비스 충족도 분석의 차이점을 분석하였고 농촌생활서비스의 중요도를 도출하였다. 본 연구에서 제시한 농촌생활서비스의 중요도를 바탕으로 충족도를 분석하는 방법은 향후 농촌지역개발사업에 접목되어 실질적인 농촌주민 정주성 향상 방안에 적극 활용될 수 있을 것이다. Centrality analysis have been applied for township development regarding rural development project by the Ministry of Agriculture, Food and Rural Affairs. It is an efficient method to evaluate a level of concentration such as rural business and life style which identify structure of target region. However, this kind approach tends to show a gap from a reality which means the result of centrality analysis does not match with rural residents’ necessity. This study will propose an analytical method of rural area based on the importance and satisfaction of Rural Living service. It recognizes a satisfaction as a priority to compare actual performance and effect between Centrality and Satisfaction Analysis. The research anticipates to derives the improvement of rural residents’ living quality on further rural development project.

건선 관절염 환자에서 동반된 대퇴골두의 무혈성 괴사

박찬수 ( Chan Su Park ),서우종 ( Woo Jong Seo ),조영재 ( Yeong Jae Cho ),차경우 ( Kyeung Woo Cha ),이찬우 ( Chan Woo Lee ),오동호 ( Dong Ho Oh ),김태권 ( Tae Gwun Kim ),민복기 ( Pok Kee Min ),김도원 ( Do Won Kim ),장윤환 ( Yun Hwa 대한류마티스학회 2003 대한류마티스학회지 Vol.10 No.3

Psoriatic arthritis and avascular necrosis of the femoral head each are relatively common diseases. However, avascular necrosis of the femoral head in psoriatic arthritisis extremely rare disease and a few cases have been reported to date. It is suggested that the use of steroids or chemotherapeutic agents, hyperuricemia, alcohol abuse, immunologic disorders, coagulopathies are risk factors of the development of avascular necrosis of the femoral head in psoriatic arthritis. This report describes a 58-year-old female patient without any of forementioned risk factors who underwent total hip replacement for femoral head avascular necrosis associated with psoriatic arthritis.

전투 상황에서 발생한 사지 총상 및 폭발창의 치료

이정은 ( Jung Eun Lee ),이영호 ( Young Ho Lee ),백구현 ( Goo Hyun Baek ),이경학 ( Kyung Hag Lee ),조영재 ( Young Jae Cho ),김영철 ( Yeong Cheol Kim ),서길준 ( Gil Joon Suh ) 대한외상학회 2013 大韓外傷學會誌 Vol.26 No.3

Purpose: We should prepare proper medical service for disaster control as South Korea is not free from terrorism and war, as we experienced through the two naval battles of the Yeonpyeong, one in 1999 and the other in 2002, the sinking of Cheonan in 2010, and the attack against the border island of Yeonpyeong in 2010. Moreover, North Korea`s increasingly bellicose rhetoric and mounting military threats against the world demand instant action to address the issue. The aim of this article is to describe our experience with three patients with combat-related gunshot and explosive injuries to their extremities and to establish useful methods for the management of patients with combat-related injuries. Methods: Three personnel who had been injured by gunshot or explosion during either the second naval battle of the Yeonpyeong in 2002 or the attack against the border island of Yeonpyeong in 2010 were included in our retrospective analysis. There were one case of gunshot injury and two cases of explosive injuries to the extremities, and the injured regions were the left hand, the right foot, and the right humerus. In one case, the patient had accompanying abdominal injuries, and his vital signs were unstable. He recovered after early initial management and appropriate emergency surgery. Results: All patients underwent emergent surgical debridement and temporary fixation surgery in the same military hospital immediately after their evacuations from the combat area. After that, continuous administration of antibiotics and wound care were performed, and definite reconstructions were carried out in a delayed manner. In the two cases in which flap operations for soft tissue coverage were required, one operation was performed 5 weeks after the injury, and the other operation was performed 7 weeks after the injury. Definite proce dures for osteosynthesis were performed at 3 months in all cases. Complete union and adequate functional recovery were achieved in all cases. Conclusion: The patient should be stabilized and any life-threatening injuries must first be evaluated and treated with damage control surgery. Staged treatment and strict adherence to traditional principles for open fractures are recommended for combat-related gunshot and explosive injuries to the extremities.

전역-국부해석을 이용한 스트레이너 필터의 구조안전성 평가

차종국(Jong Kook Cha),최주형(Joo Hyoung Choi),김정환(Jeong Hwan Kim),유찬욱(Chan Uk Ryu),조영재(Yeong Jae Cho) 대한기계학회 2012 대한기계학회 춘추학술대회 Vol.2012 No.5-2