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Eulerian 과 Lagrangian 기법을 사용한 수질모델 비교
(Y . H . Kang),(R . A . Falconer) 한국수처리학회 1997 한국수처리학회지 Vol.5 No.1
To simulate transport and mixing processes of pollutants in shallow waters, a particle tracking random walk model and the ULTIMATE QUICKEST scheme have been developed for the solution of the depth integrated advective diffusion equation. The Ito stochastic differential equation is derived to determine the particle displacements in the random walk model. These two mathematical models have been validated and compared with dye experiments in a rectangular harbour with tidal circulation. The numerical solutions obtained show good agreement with the physical model results in terms of the spatial mean concentration variation.
Non-Surgical Management of Gastroduodenal Fistula Caused by Ingested Neodymium Magnets
Phen, Claudia,Wilsey, Alexander,Swan, Emily,Falconer, Victoria,Summers, Lisa,Wilsey, Michael The Korean Society of Pediatric Gastroenterology 2018 Pediatric gastroenterology, hepatology & nutrition Vol.21 No.4
Foreign body ingestions pose a significant health risk in children. Neodymium magnets are high-powered, rare-earth magnets that is a serious issue in the pediatric population due to their strong magnetic force and high rate of complications. When multiple magnets are ingested, there is potential for morbidity and mortality, including gastrointestinal fistula formation, obstruction, bleeding, perforation, and death. Many cases require surgical intervention for removal of the magnets and management of subsequent complications. However, we report a case of multiple magnet ingestion in a 19-month-old child complicated by gastroduodenal fistula that was successfully treated by endoscopic removal and supportive care avoiding the need for surgical intervention. At two-week follow-up, the child was asymptomatic and upper gastrointestinal series obtained six months later demonstrated resolution of the fistula.
Lawson, Anton E.,Clark, Brian,CramerMeldrum, Erin,Falconer, Kathleen A.,Sequist, Jeffrey M.,Kwon, Yong Ju 한국교원대학교 과학교육연구소 2000 청람과학교육연구논총 Vol.10 No.1
The primary purpose of the present study was to test the hypothesis that two general developmentally based levels of hypothesis-testing skills exist. The first hypothesized level presumably involves skills associated with testing hypotheses about observable causal agents; the second presumably involves skills associated with testing hypotheses involving unobservable entities. To test this hypothesis, a hypothesis-testing skills test was developed and administered to a large sample of college students both at the start and at the end of a biology course in which several hypotheses at each level were generated and tested. The predicted positive relationship between level of hypothesis-testing skill and performance on a transfer problem involving the test of a hypothesis involving unobservable entities was found. The predicted positive relationship between level of hypothesis-testing skill and course performance was also found. Both theoretical and practical implications of the findings are discussed. ⓒ 2000 John Wiley & Sons, Inc. J Res Sci Teach 37: 81-101, 2000
Non-Surgical Management of Gastroduodenal Fistula Caused by Ingested Neodymium Magnets
Claudia Phen,Alexander Wilsey,Emily Swan,Victoria Falconer,Lisa Summers,Michael Wilsey 대한소아소화기영양학회 2018 Pediatric gastroenterology, hepatology & nutrition Vol.21 No.4
Foreign body ingestions pose a significant health risk in children. Neodymium magnets are high-powered, rare-earth magnets that is a serious issue in the pediatric population due to their strong magnetic force and high rate of complications. When multiple magnets are ingested, there is potential for morbidity and mortality, including gastrointestinal fistula formation, obstruction, bleeding, perforation, and death. Many cases require surgical intervention for removal of the magnets and management of subsequent complications. However, we report a case of multiple magnet ingestion in a 19-month-old child complicated by gastroduodenal fistula that was successfully treated by endoscopic removal and supportive care avoiding the need for surgical intervention. At two-week follow-up, the child was asymptomatic and upper gastrointestinal series obtained six months later demonstrated resolution of the fistula.