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Moriyama, K.,Park, H.S.,Hwang, B.,Jung, W.H. North-Holland Pub. Co 2016 Nuclear engineering and design Vol.302 No.2
The breakup of a melt jet falling in a water pool and the coolability of the melt particles produced by such jet breakup are important phenomena in terms of the mitigation of severe accident consequences in light water reactors, because the molten and relocated core material is the primary heat source that governs the accident progression. We applied a modified version of the fuel-coolant interaction simulation code, JASMINE, developed at Japan Atomic Energy Agency (JAEA) to a plant scale simulation of melt jet breakup and cooling assuming an ex-vessel condition in the APR1400, a Korean advanced pressurized water reactor. Also, we examined the sensitivity on seven model parameters and five initial/boundary condition variables. The results showed that the melt cooling performance of a 6m deep water pool in the reactor cavity is enough for removing the initial melt enthalpy for solidification, for a melt jet of 0.2m initial diameter. The impacts of the model parameters were relatively weak and that of some of the initial/boundary condition variables, namely the water depth and melt jet diameter, were very strong. The present model indicated that a significant fraction of the melt jet is not broken up and forms a continuous melt pool on the containment floor in cases with a large melt jet diameter, 0.5m, or a shallow water pool depth, @?3m.
Moriyama, Kiyofumi,Park, Hyun Sun Atomic Energy Society of Japan 2016 Journal of nuclear science and technology Vol.53 No.10
<P>We modified JASMINE code, a fuel-coolant interaction simulation code developed at Japan Atomic Energy Agency (JAEA), to extend the applicability for ex-vessel melt coolability assessment. The modification included addition of a melt particle size distribution model based on an empirical correlation and a simple non-local radiation heat transfer model, improvement in the treatment of melt particle generation, and re-agglomeration of settled particles. The modified code was tested by simulating melt jet breakup experiments, namely selected cases of ALPHA/GPM series with alumina-zirconia mixture and steel melt by JAEA, and FARO experiments with urania-zirconia mixture by Joint Research Center Ispra. Simulation results showed that the code reproduces the experimental results well for the cases with a deep subcooled water pool where the melt breaks up completely. On the other hand, significant underestimation of heat removal from the melt and overestimation of agglomeration of settled melt was encountered for conditions with a shallow or saturation temperature water pool. The melt agglomeration behavior in the simulation was sensitive to model parameters on the agglomeration criterion and heat transfer depending on conditions.</P>
동사활용형의 습득순서 : ル 형과 マス 를 중심으로 Focusing on the Verb ru-form and masu-form
Moriyama , Shin 한국일어일문학회 1999 日語日文學硏究 Vol.34 No.1
日本語 動詞 活用形의 習得順序가 어떻게 되어 있는지, 學習者가 動詞를 記憶할 때, 어떤 形態로 記憶하고, 또한 活用시킬 때, 그 活用의 原形은 어떤 形態인지 등에 관해 여러 調査를 실시하였다. 그 結果는 다음과 같다. (1) 習得順序: 어느 調査에 있어서도 대략 ル形이 マス形보다 習得이 先行된다. (2) 動詞 記憶形: 대부분의 學習者는 動詞를 ル形으로 記憶하고 있는 것 같다. (3) 動詞 活用의 原形: 動詞 活用은 記憶形인 ル形을 原形으로 할 경우가 많다. 한편 현재 시중에서 판매되고 있는 初級 敎科書들을 調査해 보면 活用形의 原形은 ル形이면서도 본문 初出形은 대부분 マス形인 것으로 나타났다. 그러나 動詞 活用의 初出形은 아래와 같은 理由로 ル形으로 하는 것이 바람직하다고 생각된다. (1) 學習者는 動詞가 처음으로 나올 때, 原形으로서의 ル形과 表出形으로서의 マス形을 동시에 學習하게 되어 學習者에게는 큰 부담이 된다. (2) 動詞의 習得順序는 マス形보다 ル形이 先行된다. (3) 認知나 習得은 形態的으로 또는 意味的으로 가장 單純한 形態 즉 prototype인 形態가 빠르기 때문에 初出形은 形態的으로도 意味的으로도 單純한 形態, 즉 ル形이어야 한다고 생각한다. (4) ル形을 活用의 原形으로 하고 マス形을 表出形으로 하는 것은 原形(-하다)과 表出形(-한다)이 다른 韓國語를 母國語로 하는 學習者에 있어서는 "行く=가다, 行きます=간다"와 같은 잘못된 認識을 줄 可能性도 있다.
Development of Health Promotion Program through IUHPE : Possibilities of Collaboration in East Asia
Moriyama, Masaki Korean Society for Health Education and Promotion 2005 보건교육건강증진학회지 Vol.22 No.3
This paper considers the possibilities of health promotion from the following perspectives; (1) IUHPE, (2) socio-cultural similarities, (3) action research, and (4) learning from our past. 1. The IUHPE values decentralized activities through regions, and countries such as Japan, Korea, Hong Kong, Taiwan and China belong to NPWP region. Since IUHPE World Conference was held in Japan in 1995, Japan used to occupy more than 60% of NPWP membership. After 2001, membership is increasing rapidly in Chinese speaking sub-region. The transnational collaboration is still in its beginning phase. 2. Confucianism is one of key points. Confucian tradition should not be seen only as obstacles but as advantages to seek a form of health promotion more acceptable in East Asia. 3 Within the new public health framework, people are expected to create and live their health. However, especially in Japan, the tendency of 'lacking of face-to-face explicit interactions' is still common at health-promotion settings as well as academic settings. Therefore, the author tried participatory approaches such as asking WIFY(interactive questions designed for subjects to review their daily life and environment) and as introducing round table interactions. So far, majority of participants welcome new trials. 4. The following social phenomena are comparatively discussed after Japanese invasion and occupation of Korea ended in 1945; status of oriental medicine, separation of dispensary services, and health promotion specialist as a national license. In contrast to Japanese' tendency of maintaining the status quo and postponing of substantial social change, trend toward rapid and dynamic social changes are more commonly observed in Korea. Although all of above possibilities are still in their beginning stages, they are going to offer interesting directions waiting for further challenges and accompanying researches.
Frequency Response Analysis of Large-Scale Biological Systems
Takaaki Moriyama,Takashi Nakakuki 제어로봇시스템학회 2012 제어로봇시스템학회 국제학술대회 논문집 Vol.2012 No.10
In this paper, we propose an analysis method for a complicated and huge biological system. As a target system, we employ a newly published signal transduction system with transcriptional control. Our method is based on a extension of frequency response analysis. Since an output response depends on both frequency and amplitude of input signal, we straightforward construct a Bode-like diagram using three-dimensional space regarding frequency, amplitude and evaluation value. We also propose that a ratio of L2 norms between input and output signals is good to use for an evaluation value.
Lipocalin-2: A novel biomarker for lung hypoplasia in congenital diaphragmatic hernia fetus
( Yoshinori Moriyama ),( Hiroyuki Tsuda ),( Tomomi Kotani ),( Seiji Sumigama ),( Tomoko Nakano ),( Shima Hirako ),( Fumitaka Kikkawa ) 대한산부인과학회 2016 대한산부인과학회 학술대회 Vol.102 No.-
Objective: Congenital diaphragmatic hernia (CDH) results in pulmonary hypoplasia and pulmonary hypertension, which are often fatal. In order to improve clinical care and counseling, reliable prenatal parameters predicting outcome of CDH fetus are urgently needed. Some prenatal predictors of outcome of CDH fetus have been reported, but they are focused mainly on the assessment of fetal lung volume, and a gold-standard parameter has not yet been established. The aim of this study is to establish an accurate predictive marker for fetal lung hypoplasia in CDH cases. Methods: Neonatal lung tissue was collected at E21 from normal and nitrofen-induced CDH rats (administered 100 mg orally at E9), and microarray analysis and real-time polymerase chain reaction (RT-PCR) were performed. Sixty-three human amniotic fluid samples of isolated CDH cases (n = 33) and scheduled Cesarean section (CS) without any fetal complication (controls) (n = 30) were obtained with signed informed consent. All amniotic fluid samples were obtained at CS performed at 35th to 38th weeks of gestation from April 2007 to January 2016. Results: Genes which showed significantly decreased expression in nitrofen-induced CDH lung were lipocalin-2 (9-fold) and GATA-2 (3.3-fold). In lipocalin-2, this result was confirmed by RT-PCR. Next, the lipocalin-2 level in human amniotic fluid was examined using ELISA, and it was significantly lower in CDH cases than in controls (73.7 ng/mL vs 163.8 ng/mL; p < 0.05). A significant positive correlation was observed between amniotic lipocalin- 2 level and lung area to head circumference ratio (p < 0.001, r<sup>2</sup> = 0.453). Conclusion: Our results suggest that gene expression level of lipocalin-2 was significantly decreased in hypoplastic lung in rats, and that amniotic lipocalin-2 level was significantly lower in CDH cases in human. Amniotic lipocalin- 2 can be a useful marker to predict the prognosis of fetal CDH.