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송의영 서강대학교 경제연구소 2000 시장경제연구 Vol.29 No.2
The purpose of this paper is twofold. One is to provide a selective survey of the recent literature on gravity equations. We discuss the empirical performance of gravity equations and the known methods of justifying them. The other purpose is to present some new results on the theoretical foundation of gravity equations. We show that the simple gravity equation holds if and only if the market shares of a country do not depend on where it sells. The widely accepted wisdom that specialization generates the force of gravity thus is not well grounded on theory.
Dieulafoy 양 병변에 의한 십이지장게실 출혈 1 예
김상현,김경환,이동현,송철수,정노원,박상제,김은규,하홍성,나일환,황윤이,성은영,최익수,신영기 대한소화기내시경학회 2001 Clinical Endoscopy Vol.23 No.1
Duodenal diverticula are first reported by Chomel in 1710. Duodenal diverticula are relatively common in adults with a prevalence of 23% in SRCP. The most duodenal diverticulum is asymptomatic. Complications such as obstruction, cholangitis, blliary stones, ulceration, perforation and hemorrhage can occur in approximately 10%. However, relatively few cases of bleeding from a duodenal diverticulum have been reported. The cause of bleeding from a duodenal diverticulum is uncertain and various suspected etiologies were suggested, such as ectopic gastric mucosa, stasis-induced ulceration, erosion into major vessels, aortoenteric fistuias, intradiverticujar polyp, aspirin-induced erosion. We report a case of a bleeding duodenal diverticulum by a Dieulafoy-like lesion and suggest this 1esion as one of posslble causes of blee4ng in duodenal diverticulum.
Glutaraldehyde 와 자동 세척기를 이용한 내시경 소독방법의 임상에서의 유용성
김영호,손희정,윤성원,최규완,이남용,백승운,이준행,고광철,이풍렬,이종철,송재훈,안병훈,김재준,최원혁,홍일철 대한소화기내시경학회 2001 Clinical Endoscopy Vol.22 No.6
Background/Aims: Safety of endoscopic procedures has been a major issue over the last 10 years. Most endoscopy units use 2% glutaraldehyde and automated endoscope reprocessors (AERs) for disinfecting gastrointestinal endoscopes. We attempted an in-use evaluation of the current reprocessing procedures. Methods: Thirty flexible endoscopes were randomly collected just after upper endoscopic examinations and were disinfected using 2% glutaraldehyde in an AER. Cultures were taken from biopsy channels (S-l), tip of the insertion tubes (S-2), umbilical cords (S-3), and angulation knobs (S-4). Results: In 63,3% (19/30) of endoscopes, there was no microbial contamination after disinfection procedures. The culture positive rates of S-l, S-2, S-3, and S-4 samples were 20,0%, 0.0%, 3.3%, and 20.0%, respectively. Microorganisms of 13 species were identified, but there was no pathogen related with reported infectious complications after endoscopic procedures. Conclusions: Current disinfection procedure using 2% glutaraldehyde and an AER appears to be very effective in decontaminating patient-used endoscopes. Low level microbial contamination of endoscopes after conventional reprocessing methods may not impose great risk on patients.
Song,Won-Seob,Kim,Young-Sun 한국자원식물학회 2002 Plant Resources Vol.5 No.2
The effects of drying agents and ethyl alcohol treatment on the flower color of Gentiana uchiyamai. The flower color was not much changed in flower sheet, in the case of absorbtion papers only. The color was least changed in Korean and China hwasunjis, in the case of absorbtion papers and silica gel treatment. The color was less changed in flower sheets, window papers, and China hwasunjis, and was most changed in newspapers, in the case of absorbtion papers and Na2SO4 수식 이미지 treatment. The color was least changed in China hwasunjis, and most changed in dampened papers, in the case of absorbtion papers and CaO treatment. The color tended to change far from the original one, as treatment time got longer, in the case of 0.01M and 0.lM of tartaric acid. The longer the treatment time and the bigger the concentration of ethyl alcohol, the bigger flower color.
Removal of Cochlodinium polykrikoides using a novel material produced from sediment - A field study
Young一Chae Song,S. Sivakumar,Sung-Chung Ko,Eung-Ju Hwang,Qtae Jo 한국항해항만학회 2007 한국항해항만학회 학술대회논문집 Vol.2 No.추계
The present study was conducted in three fields at Namhae to examine the removal efficiency of organic free, heavy metal immobilized sediment on Cochlodinium polykrikoidesand on sea water quality. The present study results concluded that removal efficiency was depends on the initial number of red tide cells. There was no drastic change in the sea water quality after sediment spray. For the comparison of effectiveness of betonite, zeolite and lime were mixed with sediment did not show any marked difference in removal. Finally, the present study evaluated 5Og/m² sediment is Sufficient to remove 100% cells density, even though various environmental factors are interfering the mechanism.
( Song¸ Sun-young ) 동국대학교 영어권문화연구소 2016 영어권문화연구 Vol.9 No.2
This paper aims to explore the potential relationship between humans and AI robotics and to suggest its challenge to the moral education of bioethics. To understand the advance of new technologies and AI robotics, I would utilize the motives of Avatar and Surrogates. In the ontological and existential view, the former gives us another task to define AI robots as independent species and the latter enables us to reflect the understanding of human dignity and the true human face to face. In the prescriptive and normative view, it is arguable whether or not both are justified in terms of the enhancement and improvement of human nature. At that point, the real and basic issue in the moral education of bioethics related to technology in future is not the problem of using machine in life, but the perspective of potential relationship between humans and AI robotics. In Korea, the curriculum of moral education is based on the conception of relationship to oneself, to others, to society-community, and to nature-transcendence. It is time to deal with the perspective of any new relationship in the moral education of bioethics to establish the critical foundation by a dialogue procedure in which students discuss and agree in complicated bioethical issues and dilemmas.