http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Risk Assessment Strategy for Decommissioning of Fukushima Daiichi Nuclear Power Station
Akira Yamaguchi,장성현,Kazuki Hida,Yasunori Yamanaka,Yoshiyuki Narumiya 한국원자력학회 2017 Nuclear Engineering and Technology Vol.49 No.2
Risk management of the Fukushima Daiichi Nuclear Power Station decommissioning is agreat challenge. In the present study, a risk management framework has been developedfor the decommissioning work. It is applied to fuel assembly retrieval from Unit 3 spentfuel pool. Whole retrieval work is divided into three phases: preparation, retrieval, andtransportation and storage. First of all, the end point has been established and the successpath has been developed. Then, possible threats, which are internal/external and technical/societal/management, are identified and selected. “What can go wrong?” is a questionabout the failure scenario. The likelihoods and consequences for each scenario areroughly estimated. The whole decommissioning project will continue for several decades,i.e., long-term perspective is important. What should be emphasized is that we do notalways have enough knowledge and experience of this kind. It is expected that thedecommissioning can make steady and good progress in support of the proposed riskmanagement framework. Thus, risk assessment and management are required, and theprocess needs to be updated in accordance with the most recent information and knowledgeon the decommissioning works.
山口明良(Akira Yamaguchi) 한국세라믹학회 2006 세라미스트 Vol.9 No.6
One of characteristic of Cr2O3-containing refractory is excellent resistance to corrosion. However, there is a problem that hexa-valent chromium, which is noxious to the human body, is easily formed by reaction between the refractory and slag with CaO, NaO2 and/or K2O. In this article, the reason why the Cr2O3-containing refractory has excellent corrosion resistance qualities, the conditions under which hexa-valent chromium formed, methods for suppressing generation of hexa-valent chromium and the possibility of the refractory components excluding Cr2O3 for the furnace are described as a base of development of further excellent refractories.
Yamaguchi, Manabu,Ikeda, Kentaro,Takenouchi, Naoki,Higashiyama, Masakazu,Watanabe, Akira Asian Australasian Association of Animal Productio 2013 Animal Bioscience Vol.26 No.7
The growth performance of embryo-transferred Japanese Black calves that were born from, and suckled by, Japanese Shorthorn cows in a cow-calf grazing system (BS-group, n = 5) was compared to that of Japanese Black calves from Japanese Black cows in a cowshed (BB-group, n = 5). The daily weight gain from birth to 1 month was higher in the BS-group than in the BB-group (p<0.01), and the same trend (p<0.05) was observed at 2 and 3 months of age. This resulted in body weight that was significantly higher for the BS-group between 1 and 3 months of age than what was observed for the BB-group (p<0.05). Heart girth was significantly greater in the BS-group than in the BB-group throughout the experimental period (p<0.01), and chest depth and withers height in the BS-group were significantly greater from 2 to 4 months of age (p<0.05) and at 4 months of age only (p<0.05). No difference in body length (p>0.05) was observed between the groups. These results suggest that the maternal effect of Japanese Shorthorn cows was positive for embryo-transferred Japanese Black calf growth during the early suckling stage. As Japanese Black calves are traded at a high price on the Japanese market, we conclude that this proposed production system is likely to improve the profitability of herd management in upland Japan.
Tetsutaro Yamaguchi,Akira Kawaguchi,Yong-Il Kim,Shugo Haga,Koshu Katayama,Hajime Ishida,Soo-Byung Park,Koutaro Maki,Ryosuke Kimura 대한치과교정학회 2014 대한치과교정학회지 Vol.44 No.2
Objective: A recent study suggested that rs6504340, a polymorphism within the homeobox B (HOXB) gene cluster, is associated with the susceptibility for malocclusions in Europeans. The resulting malocclusions require orthodontic treatment. The aim of this study was to investigate the association of rs6504340 and other dentition-implicated polymorphisms with dental and occlusal traits in Korean and Japanese populations. Methods: The study participants included 223 unrelated Koreans from the Busan area and 256 unrelated Japanese individuals from the Tokyo metropolitan area. DNA samples were extracted from saliva specimens. Genotyping for rs6504340 and four single nucleotide polymorphisms (SNPs) that have been shown to be associated with the timing of first tooth eruption and the number of teeth at 1 year of age (rs10506525, rs1956529, rs9674544, and rs8079702) was performed using TaqMan assays. The Index of Orthodontic Treatment Need (IOTN), overjet, overbite, arch length discrepancy, crown sizes, and length and width of the dental arches were measured. Spearman’s correlation coefficients were calculated to evaluate relationships between rs6504340 and these dental/occlusal traits. Results: We evaluated the aesthetic components and dental health components of the IOTN in the Korean and Japanese populations and found that neither rs6504340 nor the other four SNPs showed any association with dental and occlusal traits in these East Asian populations. Conclusions: These negative results suggest that further research is needed to identify the genetic determinants of malocclusions in order to reach a consensus.
Significance of rescue hybrid endoscopic submucosal dissection in difficult colorectal cases
Hayato Yamaguchi,Masakatsu Fukuzawa,Takashi Kawai,Takahiro Muramatsu,Taisuke Matsumoto,Kumiko Uchida,Yohei Koyama,Akira Madarame,Takashi Morise,Shin Kono,Sakiko Naito,Naoyoshi Nagata,Mitsushige Sugimo 대한소화기내시경학회 2023 Clinical Endoscopy Vol.56 No.6
Background/Aims: Hybrid endoscopic submucosal dissection (ESD), in which an incision is made around a lesion and snaring is per-formed after submucosal dissection, has some advantages in colorectal surgery, including shorter procedure time and preventing per-foration. However, its value for rescue resection in difficult colorectal ESD cases remains unclear. This study evaluated the utility of res-cue hybrid ESD (RH-ESD). Methods: We divided 364 colorectal ESD procedures into the conventional ESD group (C-ESD, n=260), scheduled hybrid ESD group(SH-ESD, n=69), and RH-ESD group (n=35) and compared their clinical outcomes. Results: Resection time was significantly shorter in the following order: RH-ESD (149 [90–197] minutes) >C-ESD (90 [60–140] min-utes) >SH-ESD (52 [29–80] minutes). The en bloc resection rate increased significantly in the following order: RH-ESD (48.6%), SH-ESD (78.3%), and C-ESD (97.7%). An analysis of factors related to piecemeal resection of RH-ESD revealed that the submucosal dis-section rate was significantly lower in the piecemeal resection group (25% [20%–30%]) than in the en bloc resection group (40% [20%–60%]). Conclusions: RH-ESD was ineffective in terms of curative resection because of the low en bloc resection rate, but was useful for avoid-ing surgery.