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정의봉(Eui-Bong Jeong),강동석(Dong-Suk Kang),최지호(Ji-Ho Choi),김한생(Han-Shang Kim),최만식(Man-Sick Choi) 한국소음진동공학회 2014 한국소음진동공학회 학술대회논문집 Vol.2014 No.10
Endurance test procedures of multipurpose tactical vehicle is constructed by comparing the Korea defence standard and TOP-2-2-506. The plan was to make the best reflect the operational environment and the actual production purposes. Endurance test of multipurpose tactical vehicle more stringent than the existing other military vehicles validation procedures. But the test plan, it is possible to reduce the cost and schedule of long verification that occurs because of the Endurance test. Through a comparison of the dynamic characteristic analysis, change of test center was to ensure the reliability and validity.
직병렬 충전 구조를 사용한 전기자동차 배터리 균형 충전
정의한(Eui-han Jeong),양창주(Chang-ju Yang),한승호(Seung-ho Han),김형석(Hyong-suk Kim) 제어로봇시스템학회 2017 제어·로봇·시스템학회 논문지 Vol.23 No.4
In this study, we describe a battery balancing charge technology using the combined method of serial charging and selective supplementary charging to resolve the unbalanced charge problem common among battery cells for electric vehicles. In this method, the major charging is performed using serial charging while the balancing is carried out with supplementary charging. The serial component is large and heavy while the supplementary component is smaller and lighter. As an upgrade to the combined balancing, we propose a new method in which the supplementary component is replaced with a small charger which charges poorly-charged cells selectively via a time-sharing strategy. The core parts of the proposed system include a sensor array to detect the individual battery cell voltage, a duty rate control incorporating IGBTs , and a battery management system. This thesis describes experimental results which show the expected functions and performance of the proposed cell balancing architecture.
남성 건강검진 수진자들에서 알코올성 및 비알코올성 지방간과 대사증후군과의 관련성
정의경(Eui-kyeong Jeong),강영한(Yeong-han Kang),박재용(Jae-yong Park) 한국콘텐츠학회 2009 한국콘텐츠학회논문지 Vol.9 No.6
최근 성인 남성에서 비만 인구가 늘어나며, 심혈관질환을 야기하는 대사증후군 유병률이 증가하고 있고, 증상이 없지만 지방간으로 진단되는 환자가 늘고 있다. 본 연구는 알코올성 또는 비알코올성 지방간 질환과 대사증후군과의 관련성이 있는지 알아보고자 하였다. 799명의 남성을 대상으로 평소 음주량을 조사하였고, 초음파 검사를 통해 지방간 유무를 확인 한 결과 297명은 정상군이었고, 206명은 알코올성 지방간, 296명은 비알코올성 지방간이었다. IDF(international diabetes federation) 기준을 적용한 대사증후군과 구성요소들을 독립변수로, AFLD(alcoholic fatty liver disease) 및 NAFLD(nonalcoholic fatty liver disease)을 종속변수로 하여 로지스틱 회귀분석을 실시하였다. 정상군과 AFLD 또는 NAFLD에서 대사증후군의 분포는 각각 7.4%, 48.8%, 34.9%이었고, 대사증후군 구성요소 중 고혈압, 고혈당, 고중성지방, 비만은 AFLD 또는 NAFLD의 위험인자였고, AFLD에선 고중성지방과 복부비만이, NAFLD에서는 복부비만이 영향력이 가장 큰 것으로 나타났다. 또한 AFLD군의 경우 대사증후군과 비만, 저HDL-콜레스테롤의 이상범위에서 지방간 중증의 교차비가 높았고, NAFLD군에서는 대사증후군과 고중성지방군의 이상범위에서 지방간 중증의 교차비가 높았다. 결론적으로 AFLD 및 NAFLD는 대사증후군 구성요소 각각의 기준과 밀접한 관련성이 있었고, 지방간 관리를 위해 꾸준하고 포괄적인 접근이 필요하다. This study was carried out to investigate of the associations of Alcoholic & Nonalcoholic fatty liver disease(AFLD & NAFLD) with metabolic syndrome(MS) defined by IDF criteria. We conducted a cross-sectional study of 799 adult males with alcohol consumption underwent laboratory investigation(control 297, alcoholic 206, nonalcoholic 296). The ultrasound scan of the liver was performed to determine the presence and the severity of FLD. We analyzed the association between the severity of AFLD & NAFLD and MS by logistic regression analysis. The distribution of metabolic syndrome was 7.4%, 48.8%, 34.9% in control, AFLD & NAFLD. The association of blood pressure, glucose, triglycerides, obesity were risk factor in AFLD & NAFLD. According to the severity of FLD, AFLD was significantly increased with MS, Obesity, low HDL-cholesterol. MS, High triglycerides was increased significantly in NAFLD(p<0.05). The prevalence of AFLD & NAFLD was increased with increasing the number of features of metabolic syndrome. This study shows that AFLD & NAFLD was closely associated with MS and its components. The patients of AFLD & NAFLD should managed and monitored to prevent metabolic abnormalities.
이승한(Seoung-Han Lee),강준희(Jun-Hee Kang),정의봉(Eui-Bong Jeong) 대한기계학회 2020 대한기계학회 춘추학술대회 Vol.2020 No.12
When developing a military vehicle, the endurance test must be performed. This test is to determine whether a vehicle meets the required distance and life span. In this paper, the driving durability test criteria proposed by the US military standard are summarized for reference when developing military wheeled vehicles and tracked vehicles.