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김이삭(Issac Kim),이선호(Sunho Lee),송민석(Minseok Song),박정욱(Jung-Wook Park) 전력전자학회 2021 전력전자학술대회 논문집 Vol.2021 No.7
본 논문에서는 차량 탑재형 충전기 (OBC)와 저 전압 배터리충전기 (LDC), 및 구동 컨버터 (TC)에서의 DC/DC 컨버터의 기능에 대해 분석한다. 또한, OBC-LDC 통합형 회로 및 OBC-TC 통합형 회로에 포함된 통합형 DC/DC 컨버터의 기능 및 특징에 대해 분석한다. 또한, 세 가지 전력변환장치의 기능을 모두 수행할 수 있는 OBC-LDC-TC 통합형 전력변환 시스템에 포함된 통합형 DC/DC 컨버터의 조건, 기능 및 특징에 대해 분석한다.
Analysis of Reserves in Multiple Life Insurance using Copula
Lee, Issac,Lee, Hangsuck,Kim, Hyun Tae The Korean Statistical Society 2014 Communications for statistical applications and me Vol.21 No.1
We study the dependence between the insureds in multiple-life insurance contracts. With the future lifetimes of the insureds modeled as correlated random variables, both premium and reserve are different from those under independence. In this paper, Gaussian copula is used to impose the dependence between the insureds with Gompertz marginals. We analyze the change of the reserves of standard multiple-life insurance contracts at various dependence levels. We find that the reserves based on the assumption of dependent lifetimes are quite different for some contracts from those under independence as its correlation increase, which elucidate the importance of the dependence model in multiple-life contingencies in both theory and practice.
The Pandemic League of COVID-19: Korea Versus the United States, With Lessons for the Entire World
Alwin Issac,Shine Stephen,Jaison Jacob,Vijay VR,Rakesh Vadakkethil Radhakrishnan,Nadiya Krishnan,Manju Dhandapani 대한예방의학회 2020 예방의학회지 Vol.53 No.4
Coronavirus disease 2019 (COVID-19) is inflicting a brutal blow on humankind, and no corner of the world has been exempted from its wrath. This study analyzes the chief control measures and the distinctive features of the responses implemented by Korea and the United States to contain COVID-19 with the goal of extracting lessons that can be applied globally. Even though both nations reported their index cases on the same day, Korea succeeded in flattening the curve, with 10 752 cases as of April 28, 2020, whereas the outbreak skyrocketed in the United States, which had more than 1 million cases at the same time. The prudent and timely execution of control strategies enabled Korea to tame the spread of the virus, whereas the United States paid a major price for its delay, although it is too early to render a conclusive verdict. Information pertaining to the number of people infected with the virus and measures instituted by the government to control the spread of COVID-19 was retrieved from the United States Centers for Disease Control and Prevention and the Korea Centers for Disease Control and Prevention websites and press releases. Drawing lessons from both nations, it is evident that the resolution to the COVID-19 pandemic lies in the prudent usage of available resources, proactive strategic planning, public participation, transparency
Cheong Issac,Castro Victoria Otero,Tamagnone Francisco M. 대한신경집중치료학회 2022 대한신경집중치료학회지 Vol.15 No.1
Background: Internal carotid artery (ICA) dissection is one of the most common causes of stroke in young patients. Ultrasonographic assessment of the carotid artery is the method of choice for early detection. The use of the conventional technique for diagnosis is limited since dissection frequently occurs in the distal portion of the ICA. Case Report: We describe the case of a 48-year-old Argentinian woman with malignant cerebral infarction secondary to ICA dissection. We diagnosed her with neck vessels using conventional ultrasonography and a transoral ultrasonographic approach combined with transcranial ultrasonography. Conclusion: We recommend the transoral assessment of ICA combined with ultrasonography as a non-invasive method for the diagnosis of ICA dissection.