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윤태욱(Tae-Wook Yoon),고영봉(Young-Bong Ko),고병천(Byung-Chun Ko),박경채(Kyeung Chae Park) 한국표면공학회 2010 한국표면공학회지 Vol.43 No.5
FTMP(friction thermo-mechanical process) is an adaptation of friction stir welding, and can be used as a generic process to modify the microstructure at selective locations. In this study, in order to analyze characteristics of surface modification of ACA4 castings by FTMP, change of rotating speed(R/S) and traveling speed(T/S) of tool were applied as conditional parameter. Analysis of microstructure, hardness, surface roughness and depth of modified zone(MZ) were searched. The best condition were obtained at R/S 600 rpm and T/S 100 ㎜/min. At this time, hardness was 82 HV, the surface roughness was 0.07 ㎜ and the depth at MZ was 1.72 ㎜. Free defects microstructure and fine Si particles formation and strong forging effects were analyzed at MZ.
동아시아 사회진화론의 선구자, 엄복의 사상적 지형도 -『천연론(天演論)』을 중심으로-
윤태욱 ( Tae Wook Yoon ) 연세대학교 의과대학 의사학과 의학사연구소 2009 연세의사학 Vol.12 No.2
After China had suffered the ignominy of defeat by Japan at the Sino-Japanese War (of 1894-5), Yan Fu (1854-1921) began to worry about the future of China. He attempted to modernize China by introducing western thoughts. In 1898, he translated “Evolution and Ethics”, and published “Tianyanlun”. Through this book, he earnestly introduced Social Darwinism to China for the first time. In “Evolution and Ethics”, Thomas Henry Huxley (1825-1895) stressed the need for humane interventions to combat the cosmic process. However, at the same time, he maintained a seemingly contradictory opinion that humane interventions such as ethics were still subordinate to the cosmic process. On the vague theory of Huxley, Yan Fu``s stance was ambiguous. On the one hand, he came around to Huxley’s theory but, on the other hand, he criticized it. The basis of his criticism was the theory of Herbert Spencer (1820-1903). Spencer had underlined the individualistic liberty, but Yan Fu regarded the liberty as a way to found a rich and powerful country. Yan Fu thought that Spencer``s reasoning had a stronger base than Huxley``s and Spencer haunted his mind. Eventually, “Tianyanlun” could be considered as an attempt to spread the theory of Spencer through a translation of Huxley`s book.
윤태욱 ( Tae Wook Yoon ) 연세대학교 의과대학 의사학과 의학사연구소 2012 연세의사학 Vol.15 No.1
William Harvey(1578~1657) lived in the seventeenth century, often referred to as the ‘Scientific Revolution.’ He demonstrated that blood circulates in our body, which went against conventional wisdom-blood is created when needed and destructed after used. He collected the data of his research works and published On the Motion of the Heart and Blood in Animals(Exercitatio Anatomica de Motu Cordis et Sanguinis in Animalibus) in 1628. The South Korean version of this book is included in this paper. Harvey`s works are characterized by anatomical approach and natural philosophy. Harvey emphasized results from vivisection of a large number of animals, and he calculated the total amount of blood that is flowing through the body. Also, he tried to verify his own hypothesis by designing Ligature and Valves experiment. From these scientific approaches, Harvey is considered a founder modern medicine. Harvey, however, used another source. He was full of respect for the academic traditions of ancient Greece, especially for the philosophy of Aristotle. This is the second feature of Harvey`s works. Aristotle had regarded the idea of circulation as important, so Harvey could produce the theory of blood circulation. Also, he considered heart as the center of the body in accordance with Aristotle`s ideas. But, unlike Aristotle, Harvey valued blood, not the heart, as the origin of life. Beyond that, Harvey maintained a view that Nature did nothing in vain, meaning our bodies were made in the most economical and efficient way. This view should make Harvey to be responsive to contradiction or superfluous reiteration among theories about heart and blood. Harvey could harmonize the experimental area of anatomy and the area of natural philosophy without conflict by refusing to teleological argumentation. In spite of the influence that he got from the philosophy of Aristotle, he purposely avoided arguing about teleology or God`s plan. He believed evidence from experimentation was enough and was satisfied that he could discovery the way how body works.
한국 남성 노인에서 발견된 췌장 고형 가유두상 종양의 증례
정근용 ( Geun Yong Jung ),윤태욱 ( Tae Wook Yoon ),박영준 ( Young Jun Park ),최준영 ( Jun Young Choi ),정지환 ( Jee Hwan Jung ),임태규 ( Tae Kyu Lim ) 대한내과학회 2015 대한내과학회지 Vol.89 No.5
Solid pseudopapillary tumor (SPT) of the pancreas is a rare tumor that typically affects young women without causing significant clinical symptoms. No case of SPT in an old man has been reported in South Korea, and such cases are very rare worldwide. We report a 70-year-old man with SPT of the pancreas with multiple organ metastasis. Although surgical resection is the treatment of choice for SPT, we decided not to treat, considering his age and the disease severity. (Korean J Med 2015,89:589-592)
저절로 호전된 다발공동성 결절 형태의 IgG4 연관 폐 질환의
박영준 ( Young Jun Park ),윤태욱 ( Tae Wook Yoon ),정근용 ( Geun Yong Jung ),정지환 ( Ji Hwan Chung ),최준영 ( Joon Young Choi ),김은주 ( Eun Joo Kim ),임효정 ( Hyo-jeong Lim ) 대한내과학회 2016 대한내과학회지 Vol.90 No.5
Immunoglobulin (Ig) G4-related disease was recently recognized as a systemic fibro-inflammatory disease characterized by dense lymphoplasmacytic infiltrates, storiform fibrosis, and obliterative phlebitis with IgG4-positive cells in the target tissues. This disease can localize to a single organ or be diffuse in multiple organs. Pulmonary manifestation in IgG4-related lung disease presents as various sized nodules, lung masses, patchy ground-glass opacities, consolidation, thickened bronchovascular bundles, nodular pleural lesions, and interstitial lung disease. Traditional treatment for IgG4-related lung disease includes systemic (cortico) steroids. Here, we report a case of IgG4-related lung disease presenting as multiple cavitary nodules that spontaneously regressed without systemic steroid use. (Korean J Med 2016;90:449-454)