• 대한기계학회논문집B
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• 제35권3호
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• pp.255-262
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• 2011

원자력발전소에 냉각재상실사고 발생 시 보온재 파편 등 이물질이 발생하여 방출된 냉각재를 따라 재순환 집수조에 흘러갈 수 있다. 이물질들이 펌프 흡입구에 축적되면 냉각수 흡입을 방해함으로써 원자력발전소 안전에 위협이 될 수 있다. NEI 04-07 및 USNRC 의 평가보고서가 이물질이동분율 평가에 대한 방법론을 제공하였지만 각 원자력발전소 고유특성을 반영한 추가적인 연구가 필요하다. 본 연구에서는 전산유체역학 코드를 사용한 원자력발전소 파단방출이동 해석 방법론을 수립하고 해석을 수행하였다. 해석 결과, 소형 이물질의 32%가 원자로건물 상부로 이동하였다. 이는 NEI 04-07 의 기본해석결과보다 7% 많은 양이다. 본 연구결과는 향후 수행될 이물질이동에 대한 해석적 연구에 중요한 참고자료가 될 것으로 판단된다.

• 원자력산업
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• 제16권10호통권164호
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• pp.36-45
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• 1996

올해로 상업 운전 10주년을 맞이한 고리 4호기는 영국의 원자력 전문지인 지가 95년 4월부터 96년 3월까지 1년간 전세계의 15만kW 이상 용량의 원자로 351기를 대상으로 조사한 운전 실적에서 이용률 100.0$\%$로 세계 1위를 기록, 지난 94년에 이어 두 번째로 이용률 세계 1위를 차지했다. 그 의의와 운영 경험을 들어본다.

• 원자력산업
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• 제36권11호
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• pp.78-83
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• 2016

원자력이 잠수함의 추진 동력으로 사용된 역사는 오래되었지만 해상 원전 플랫폼 같은 민간 해양 사업 부문에 활용되기 시작한 것은 최근의 일이다. 중국과 러시아는 해상 원전 플랫폼 개발 계획에 전념해 왔는데 이제 그 첫번째 플랫폼 개발 사업의 완료를 눈앞에 두고 있다. 미 원자력에너지협회(NEI)가 해상 원전 플랫폼 개발 계획의 내용과 해상 원전이 환경이나 지역 안보 문제에 어떠한 의미를 가져오게 되는지 살펴보았다.

• 원자력산업
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• 제37권9호
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• pp.25-31
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• 2017

본고는 미국원자력협회(NEI, Nuclear Energy Institute)에서 2014년 4월에 발간한 백서(White Paper)로 원자력 발전의 경제적 효과를 다루고 있다. 백서는 전력 수요에 부응할 수 있으면서 온실가스도 발생되지 않는 발전원 중 이미 기술이 입증된 에너지원은 원자력 발전이 유일하다고 기술하고 있다. 백서 전문을 게재한다.

• 동의생리병리학회지
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• 제18권3호
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• pp.713-723
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• 2004

With regard of YinYang and Five Elements Theory, predominance of Yin or Yang is a key point to discuss Nourishin Ying or Reinforcing Yang. There are two major branches about studying predominance of Yin or Yang. Zhu Danxi advocated the theory that Yang was always in excess while Yin was often deficient, and thus belonged to the School for Nourishing the Yin. Zhang Jie-bin advocated that Yang is easily deficient while Yin is easily sufficient. It seems that they studied Wang Bing's 'Ministerial fire rule on all thing instead of Imperial Fire' and right Kidney Mingmen theory in Nan Jing, which are both related to the First Yang in the Book of Changes and say Mingmen fire is the host of the body. Zhu Danxi insisted that Mingmen fire was easily in excess and likely to become pathogenic fire while Water phase was easily in deficiency, so the doctors should nourish Yin and suppress Yang. Zhang Jie-bin said that Mingmen fire is vulnerable so the doctors should fortify yang and reinforce Mingmen fire. Suk Gock Master Lee thought that the Book of Changes and Nei Jing had a viewpoint of Fortify Yang as regards of some distinguished Physicians' articles about predominance of YinYang. The author's going to discribe Suk Gock's Fortify Yang Theory with viewpoints of Nei Jing and the Book of Changes.

• 동서간호학연구지
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• 제23권1호
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• pp.75-85
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• 2017

Purpose: This study was conducted to examine the effects of Pericardium Kimek (K9) and Nei-Guan (P6) acupressure on relief of the anxiety, nausea, retching and physiologic changes (oxygen saturation, blood pressure, heart rate, temperature and respiration) in the patients undergoing unsedated esophagogastroduodenoscopy. Methods: A quasi-experimental research design was used. The participants were assigned into the listed three groups, i.e., the control group, the first experimental group (E1: K9 acupressure group) and the second experimental group (E2: P6 acupressure group). A total of 60 participants were included for analysis. Results: The severity of nausea (F=3.503, p=.037), the oxygen saturation (F=5.417, p=.007). and the respiration rate (F=7.270, p=.002) showed statistically significant differences in three groups. Conclusion: Based on the results of the present study, K9 acupressure with moxa pellets and P6 acupressure with wristbands (Sea-Band) are considered to be safe and an easy-to-apply intervention to relieve nausea and maintain the level of oxygen saturation and respiration rate in patients undergone unsedated esophagogastroduodenoscopy.

• 대한간호학회지
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• 제38권4호
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• pp.503-512
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• 2008

Purpose: This study was to identify the effects of Nei-Guan accupressure using a wrist band on postoperative nausea and vomiting after middle ear surgery. Methods: The study design was a nonequivalent control group non-synchronized posttest design. Forty patients were assigned into two groups of 20 patients, the wrist band group and the control group. In the wristband group, acupressure was applied with a wrist band on the P6 point at both wrists from 30 min before to 24 hr after anesthesia. Results: The 1st hypothesis 'Applied wrist band groups will have a greater reduction in the nausea & vomiting grades by INVR than the control group' was accepted (t=2.303, p=.028). The 2nd hypothesis 'The Applied wrist band groups will have a greater reduction in the occurrence of nausea & vomiting than the control group' was partly accepted. The 3rd hypothesis 'The applied wrist band group will have a greater reduction in injection of antiemetics for 24 hr. post anesthesia than the control group' was rejected. Conclusion: Acupressure on the P6 point using a wrist band is effective to alleviate nausea for middle ear surgery patients.

• ALGAE
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• 제30권2호
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• pp.89-101
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• 2015

Ecklonia cava Kjellman is a common kelp found in shallow subtidal in warm-temperate waters in the northwest Pacific Ocean. This species has shown substantial morphological variation along with subsistence in different locations and local environments. We quantified the magnitude of morphological variation of E. cava from six populations along ~700 km of coastline from Jeju Island to Dokdo in Korea. In addition, we examined genetic distance among the populations using random amplified polymorphic DNA (RAPD) analysis. Most morphological characteristics investigated were significantly different among locations. Multivariate analyses indicated two phenetically distinct groups (nearshore, sheltered vs. offshore, exposed), indicating wave exposure with turbidity are presumably major factors for the separation. With RAPD data, results of Nei's diversity (H) and AMOVA showed considerable variations in within- and between-populations. Pairwise ${\Phi}_{ST}$ and $N_m$ values indicated moderate gene flow between the six locations. Results of Nei's analysis revealed three genetically distinct groups, not consistent with the morphological groupings, indicating that a time gap may exist between morphological and genetic variations. This study also suggests dispersal distance of this kelp may be longer than what is commonly thought and genetic similarity in the populations was largely reflected by the direction of ocean current rather than just geographical distance.

• Asian-Australasian Journal of Animal Sciences
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• 제15권11호
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• pp.1536-1542
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• 2002

The genetic variability of three poultry breeds namely Aseel, Miri and Nicobari taken from different geographical locations of India were evaluated using 15 microsatellite loci. No. of alleles varied from 3 to 9 in Aseel, 3 to 8 in Miri and 2 to 7 in Nicobari. Mean PIC values in Aseel, Miri and Nicobari breeds were 0.64, 0.66 and 0.63, respectively. Average unbiased heterozygosity and direct count heterozygosity were 0.65 and 0.59, 0.68 and 0.61, and 0.64 and 0.57 in Aseel, Miri and Nicobari breeds, respectively. High heterozygosity values revealed in this study are indicative of low level of inbreeding, large population size and no or low selection pressure for commercial trait in all three populations. The estimate of genetic distances using Nei's standard, Nei's minimum and Reynold's distance revealed Aseel and Nicobari to be more closely related than Miri breed of poultry.

• Journal of Ecology and Environment
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• 제36권3호
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• pp.205-210
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• 2013

Cicuta virosa L. (Apiaceae) is a perennial emergent plant designated as an endangered species in South Korea. According to the former records, only four natural habitats remain in South Korea. A former study suggested that three of four populations (Pyeongchang: PC, Hoengseong: HS, Gunsan: GS) would be classified as different ecotypes based on their different morphological characteristics and life cycle under different environmental conditions. To evaluate this suggestion, we estimated genetic diversity in each population and distance among three populations by random amplification of polymorphic DNA. Seven random primers generated a total of 61 different banding positions, 36 (59%) of them were polymorphic. Nei's gene diversity and the Shannon diversity index increased in the order of PC < HS < GS, which is the same order of population size. In the two-dimensional (2D) plot of first two principal components in principal component analysis with the presence of 61 loci, individuals could be grouped as three populations easily (proportion of variance = 0.6125). Nei's genetic distance for the three populations showed the same tendency with the geographical distance within three populations. And it is also similar to the result of discriminant analysis with the morphological or life-cycle factors from the previous study. From the results, we concluded that three different populations of C. virosa should be classified as ecotypes based on not only morphology and phenology but genetic differences in terms of diversity and distance as well.