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鄭光龍 국립문화재연구원 2002 헤리티지:역사와 과학 Vol.35 No.-
To compare and analyze technical system related to manufacturing of ironware during the period of the Three Kingdoms, an analysis was conducted on the minute system of metalwork, as study objects, of the remains of the Mt. Wolpyeong fortress wall in Daejeon in the period of capital during the era of the Three Kingdoms in the 5th century, the Sanwol-ri remains in the 6th century in Gunsan and the remains of ironware excavated from the great ancient tomb of Hwangnam of the Silla dynasty in the 5th century. The result of analysis shows that in the most of the casting products, the minute system of white cast iron were contained. While the iron part of decarbonization was in the system by casting as white cast iron in the central part, on the surface layer it was turned out that comparatively uniform 100% pearlite system of about 1∼2mm degree was existing. The part of pearlite on the surface layer was caused by decarbonization, which appears in all the parts of blade front end and handle. Therefore, it was found that the iron part of decarbonization was manufactured by casting, and then was processed at the high temperature by decarbonization. For the products of forging, after processing the products on the basis of pure iron for materials, they manufactured the ironware that raises the strength by carbonizing that keeps carbon infiltrated on the necessary part, by the method of black smith welding that add pure iron to steel, or by varying the method of heat processing onto the part required of strength. Though limited, we could understand that the technical systems for manufacturing skill of ironware in the areas of Baekje and Silla were different each other. In the technical system for Hwangnam great ancient tomb in the Silla area, it is found that they had raised the strength on the necessary part by applying the steelmaking method of carbonizing in the last stage of production of products, in the meantime in Baekje area, it appears that they had produced steel in advance in the first stage of production of the products, and used the produced steel only to the necessary part.
홍종욱,정광룡,Hong, Jong-Ouk,Jung, Kwang-Yong 국립문화재연구소 1994 保存科學硏究 Vol.15 No.-
A typology was established for 15 pottery artefacts at Chejuisland. Conjectured methods of manufacture were confirmed by radiography X-ray diffraction. Scanning electron microscopy etc. The compositions and mineralogy of $500^{\circ}C$ to $1200^{\circ}C$ was measured and compared with those of microstructure. The mechanism of sintering was impurity-initiated, liquid-phase sintering. The making, firing, and sometimes exploding of the figurines may have been the prime function of the pottery at this site rather than being manufactured as permanent, portable object.
이상민,오재석,연갑희,정광룡,정승곤,박홍주,오희균,국민석 대한치의학회 2014 Journal of korean dental science Vol.7 No.1
Few dental procedures are potentially life-threatening. Note, however, that a dental extraction can result inpreventable death. Severe post-extraction bleeding can occur, which may give rise to an alarming situation if thereis any delay in detecting and managing the problem. The most immediate danger for a healthy patient with severepost-extraction hemorrhage is airway compromise. Acute airway obstruction from post-extraction hematoma isrelatively uncommon, but it may occur with fatal consequences if there is any reluctance to maintain the airwayclearance. Therefore, dentists and oral and maxillofacial surgeons should have clear understanding of the problemand measures to control it. Active bleeding that is not controlled by local measures in a dental office should bereferred to the nearest hospital emergency department as soon as possible for appropriate management.