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한국 동해산 도루묵의 이석횡단절단법에 의한 연령사정 및 성장
이해원,강용주 한국해양과학기술원 2006 Ocean and Polar Research Vol.28 No.3
The ages of sandfish, Arctoscopus japonicus sampled from the eastern sea of Korea, were determined by the transverse section method of otoliths. Ages were assigned to every individual according to the number of opaque zones, and then fitted to the von Bertalanffy growth equation. Estimated equations were Lt=-e-0.2976(t+) for females and Lt=-e-0.2917(t+1.2087)) for males, where t is age (year) and Lt is body length (mm) at age t. These two equations were significantly different and the body length of females calculated from the equation was larger than that of males except at 1 year old.
이해원,이상원 한국물리학회 2009 새물리 Vol.58 No.6
The heat kernel expansion of the general elliptic differential operators defined in a curved space-time is investigated. For this, we introduce a method using the tangent vector coordinate system with parallel transport along geodesics. As a result, the new differential operators have better covariance properties. We also propose a method of expanding the heat kernels, the method can be used in higher-order operators like fourth-order operators. As an application of this formalism, we calculate the first few terms of the heat kernel expansion of general second-order operators and general fourth-order operators in a general space-time dimension. 굽어진 시공간에서 타원 미분 연산자들의 열핵(heat kernel) 전개를 연구하였다. 이를 위하여 접선 벡터(tangent vector) 좌표계를 사용하고 추가로 지름길(geodesic)을 따라서 장들을 평행이동하는 방법을 사용하였다. 그 결과 연산자들이 공변성을 이용하기 쉬운 꼴로 표현될 수 있었다. 또한 4계 연산자와 같은 고계 연산자의 경우에도 적용가능한 열핵 전개 방법을 제시하였고 여기에 위의 좌표계를 사용하여 계산을 단순화하였다. 이 방법의 응용으로 일반적인 차원에서 일반적인 2계 또는 4계 연산자의 열핵 전개의 처음 두 항을 계산하였다.
The Role of Major Donors in Health Aid to the Democratic People’s Republic of Korea
이해원,Deborah Y. Ahn,최소영,김영찬,최현주,박상민 대한예방의학회 2013 Journal of Preventive Medicine and Public Health Vol.46 No.3
We investigated the major trends in health aid financing in the Democratic People’s Republic of Korea (DPRK) by identifying the primary donor organizations and examining several data sources to track overall health aid trends. We collected gross disbursements from bilateral donor countries and international organizations toward the DPRK according to specific health sectors by using the Organization for Economic Cooperation and Development creditor reporting system database and the United Nations Office for the Coordination of Humanitarian Affairs financial tracking service database. We analyzed sources of health aid to the DPRK from the Republic of Korea (ROK) using the official records from the ROK’s Ministry of Unification. We identified the ROK, United Nations Children’s Fund (UNICEF), World Health Organization (WHO), United Nations Population Fund (UNFPA), and The Global Fund to Fight AIDS, Tuberculosis and Malaria (GFATM) as the major donor entities not only according to their level of health aid expenditures but also their growing roles within the health sector of the DPRK. We found that health aid from the ROK is comprised of funding from the Inter-Korean Cooperation Fund, private organizations, local governments, and South Korean branches of international organizations such as WHO and UNICEF. We also distinguished medical equipment aid from developmental aid to show that the majority of health aid from the ROK was developmental aid. This study highlights the valuable role of the ROK in the flow of health aid to the DPRK, especially in light of the DPRK’s precarious international status. Although global health aid from many international organizations has decreased, organizations such as GFATM and UNFPA continue to maintain their focus on reproductive health and infectious diseases.
이해원,서경석,김주현,신우영,이남준,제환준,정진욱,오소원,강건욱,이건욱 대한영상의학회 2010 Korean Journal of Radiology Vol.11 No.4
Although liver transplantation (LT) is the only effective treatment option for hepatopulmonary syndrome (HPS), the post-LT morbidity and mortality have been high for patients with severe HPS. We performed post-LT embolotherapy in a 10-year-old boy who had severe type I HPS preoperatively, but he failed to recover early from his hypoxemic symptoms after an LT. Multiple embolizations were then successfully performed on the major branches that formed the abnormal vascular structures. After the embolotherapy, the patient had symptomatic improvement and he was discharged without complications.
이해원 한국물리학회 2010 새물리 Vol.60 No.1
Heat kernel expansions of the d th-order elliptic operators obtained by using a product of d/2 second order elliptic operators in curved space-time with dimension n are investigated. We calculate the first two coefficient functions of the expansions, which are not the simple sum of the coefficients for each second order elliptic operator. For the calculations, we use a method with a tangent vector coordinate system, with which our calculatins are manifestly covariant under coordinate and gauge transformations. d/2 개의 2계 타원 미분 연산자들의 곱으로 만들어진 d-계 타원연산자의 열핵(heat kernel) 전개를 연구하였다. 일반적인 차원 n 을 갖는 굽어진 시공간에서 계산을 수행하였다. 열핵 전개의 처음 두 항들을 계산하였는데 그 결과는 각 2계 연산자의 경우에 얻어진 항들을 단순히 더한 것과 같지 않고 추가적인 항들이 존재하게 된다. 이러한 계산을 위하여 좌표변환의 공변성을 유지하면서 접선벡터좌표계를 사용하는 방법을 사용하였다.