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Jinho Song,Tae Hwan Koh,One Park,Daeil Kwon,Seonghoon Kang,Kyeongmin Kwak,Jong-Tae Park 대한직업환경의학회 2019 대한직업환경의학회지 Vol.31 No.-
Background: Depression is considered as a risk factor for cardiovascular disease (CVD) and associated with changes in individuals" health status that might influence CVD risk. However, most studies have scrutinized this relationship on a rather narrower and specific study population. By focusing on general population of Korea, we sought to inspect the association of depression with CVD risk and cardiovascular risk factors. Methods: The data from the first year (2016) of the 7th Korea National Health and Nutrition Examination Survey was used. Participants were classified by the Patient Health Questionnaire-9 (PHQ-9) score as such: normal group (PHQ-9 score 0–4), mild depression (MD) group (PHQ-9 score 5–9) and moderate and severe depression (MSD) group (PHQ-9 score 10–27). General linear model was used to analyze differences and the trend of mean CVD risk according to depression level. Adjusted odds ratios (AORs) were calculated by logistic regression to identify the association between depression and cardiovascular risk factors after adjusting for age. Results: Mean CVD risk of MSD group was higher than that of normal group (p < 0.05). There was a tendency of CVD risk to increase as depression worsened (p < 0.01). Among men, MSD group was associated with current smoking (AOR, 2.97; 95% confidence interval [CI], 1.78–4.97), taking antihypertensive medications (AOR, 2.42; 95% CI, 1.26–4.66), increased fasting blood sugar (> 125 mg/dL; AOR, 2.37; 95% CI, 1.25–4.50) and taking diabetes medications (AOR, 3.08; 95% CI, 1.65–5.72). MD group was associated with current smoking (AOR, 1.60; 95% CI, 1.18–2.17). Among women, MSD group was associated with high body mass index (≥ 25 kg/m²; AOR, 1.61; 95% CI, 1.11–2.32), large waist circumference (≥ 85 cm; AOR, 1.63; 95% CI, 1.12–2.37), current smoking (AOR, 5.11; 95% CI, 3.07–8.52) and taking diabetes medications (AOR, 2.62; 95% CI, 1.68–4.08). MD group was associated with current smoking (AOR, 1.86; 95% CI, 1.18–2.93). Conclusions: We suggest that depression is associated with increased risk for CVD occurrence in general population of Korea.
Jinho Song,Junhee Lee,Kwanghee Ko,Won-Don Kim,Tae-Won Kang,Jeung-Youb Kim,Jong-Ho Nam 한국CDE학회 2021 Journal of computational design and engineering Vol.8 No.1
In this paper, a method for classifying 3D unorganized points into interior and boundary points using a deep neural network is proposed. The classification of 3D unorganized points into boundary and interior points is an important problem in the nonuniform rational B-spline (NURBS) surface reconstruction process. A part of an existing neural network PointNet, which processes 3D point segmentation, is used as the base network model. An index value corresponding to each point is proposed for use as an additional property to improve the classification performance of the network. The classified points are then provided as inputs to the NURBS surface reconstruction process, and it has been demonstrated that the reconstruction is performed efficiently. Experiments using diverse examples indicate that the proposed method achieves better performance than other existing methods.
Effect of melt water interaction configuration on the process of steam explosion
Song, JinHo,Na, YoungSu,Hong, SeongWan,Hong, SeongHo Atomic Energy Society of Japan 2017 Journal of nuclear science and technology Vol.54 No.1
<P>Steam explosion experiments are performed at various modes of melt water interaction configuration using prototypic corium melt. The tests are performed to simulate bothmelt water interaction in a partially flooded cavity and melt water interaction in a cavity with submerged reactor. The tests are performed using zirconia and corium melts. The behavior of melt jet fragmentation during the flight in the air and fragmentation and mixing of melt jet in water is investigated by a high-speed video visualization and by comparison of debris size distribution and morphology of debris. Strength of steam explosion is estimated by measuring dynamic pressure and dynamic force.</P>
Post-Fukushima challenges for the mitigation of severe accident consequences
Song, JinHo,An, SangMo,Kim, Taewoon,Ha, KwangSoon Korean Nuclear Society 2020 Nuclear Engineering and Technology Vol.52 No.11
The Fukushima accident is characterized by the fact that three reactors at the same site experienced reactor vessel failure and the accident resulted in significant radiological release to the environment, which was about 1/10 of the Chernobyl releases. The safe removal of fuel debris in the reactor vessel and Primary Containment Vessel (PCV) and treatment of huge amount of contaminated water are the major issues for the decommissioning in coming decades. Discussions on the new researches efforts being carried out in the area of investigation of the end state of fuel debris and Boling Water reactor (BWR) specific core melt progression, development of technologies for the mitigation of radiological releases to comply with the strengthened safety requirement set after the Fukushima accident are discussed.
송진호(Jinho Song),오인영(Inyoung Oh),장길상(Gilsang Jang),손문구(Moongu Son),고광희(Kwanghee Ko) 한국정보기술학회 2022 Proceedings of KIIT Conference Vol.2022 No.12
객체 3D 데이터를 얻는 방법은 기기 발전으로 인해 다양화되고 있다. 그중 널리 쓰이는 방법 중 하나는 마커기반 정합으로 해당 방법을 사용하면 저비용 장비만으로 객체에 대한 3D 정보를 간편하게 얻을 수 있다. 그러나 마커기반 정합은 탐지된 마커 정보에 의존하고 있고, 마커 관련 정보가 손실 될 경우 정합이 제대로 수행되지 못해 정확한 3D 정보를 얻지 못한다는 문제점이 있다. 본 논문은 이와 같은 단점을 극복하기 위해 실시간으로 촬영 시 매 프레임마다 마커기반 정합 성공 여부를 체크하고, 실패시 과거 프레임들에서 마커 정보를 가져와 보안하는 알고리즘을 제안한다. Currently various 3D data acquisition method are developed, and one of the popular methods is marker-based registration method. People can conveniently obtain 3D geometric information of the object using low-cost scanners by using markers. But, it is difficult to obtain accurate 3D data if some makrer information is lost during acquisition. Therefore, this paper proposes the framework to check whether marker registration is successfull or not for each frame, and bring marker information from previous frames if the framework determines the regisration is likely to fail.
미 합동작전개념의 형성과정과 각 군 간 경쟁 -공해전투와 다영역작전 개념 사례 분석-
송진호 ( Song Jinho ),설인효 ( Seol Inhyo ) 한일군사문화학회 2024 한일군사문화연구 Vol.41 No.0
본 연구는 합동작전개념의 형성 및 발전과정 고찰을 위하여 2010년대 이후 미국의 합동작전개념 형성을 주도했던 공해전투와 다영역작전의 형성 및 전개과정을 분석하였다. 특히 이 과정에서 각 군 간 경쟁이 갖는 의미를 조명하기 위하여 두 작전개념의 등장과 발전과정에서 각 군의 역할과 노력을 체계적으로 분석하였다. 통상적으로 각 군 간 경쟁은 소모적이고 부정적 영향이 큰 것으로 인식된다. 그러나 미군의 사례를 살펴보면 새로운 합동작전개념 선점과 이를 통한 자군의 역할 확대를 위한 경쟁이 보다 완성도 높고 합동성을 갖춘 개념 발전에 상당한 기여를 했다는 점이 발견된다. 즉 합동작전개념의 선정 및 발전에 전투실험, 군사연습 등 객관화된 지표가 존재하고 공정한 경쟁이 보장될 경우 각 군은 보다 우수한 작전개념 제시를 위해 선의의 경쟁을 벌이고 그 결과 새롭게 제기된 군사위협 대응을 위한 효과적인 방안 산출이 가능하다는 것이다. 우수한 합동작전개념의 산출은 우리 군에도 중대한 과제이다. 우리 군도 각 군 간 경쟁이 혁신적 개념 산출의 추동 요소가 될 수 있도록 건전한 경쟁을 촉발할 수 있는 여건 조성을 위해 노력해 나가야 할 것이다. In order to examine the formation and development of joint operational concepts, this study analyzes the formation and development of Air-Sea Battle and Multi-Domain Operations, which have dominated the formation of U.S. joint operational concepts since the 2010s. In particular, it systematically analyzed the roles and efforts of each military in the emergence and development of the two operational concepts to shed light on the meaning of interservice rivalry in this process. In general, interservice rivalry is perceived as consuming and having a negative impact. However, the U.S. military’s case shows that competition to win new joint operational concepts and expand the role of its own forces has made significant contributions to the development of more complete and joint concepts. In other words, if objective indicators such as warfighting experiments and military exercises are present in the selection and development of joint operational concepts and fair competition is guaranteed, each military can compete in good faith to present superior operational concepts and, as a result, produce effective measures to respond to emerging military threats. Producing a superior joint operational concept is a major challenge for our military. Our military should strive to create the conditions to spark healthy competition so that competition among the services can be a driving force for innovative concepts.