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증기전처리가 상수리나무판재의 건조속도와 건조결함에 미치는 영향
이형우,정희석 한국목재공학회 1985 목재공학 Vol.13 No.2
This study was carried out to investigate the effects of presteaming on the drying rate and drying defects of 3 cm - thick Quercus acutissima. Specimens for presteaming were steamed green at 100℃ for A hours and then kiln-dried to 10 percent moisture content with controls, using the kiln-drying schedule (T₄ - C₂) recommended by Rasmussen. The results obtained were as follows: I. Presteaming reduced drying time approximately 18 percent from 70 to 10 percent moisture content. 2. The effect of presteaming on surface checking was not significant. 3. Presteamed specimens showed the reduction in end checking compared with controls. 4. Percents of boards with collapse, cupping, and honeycomb of presteamed specimens were slightly lower than those of controls. 5. Dry lumber grade of presteamed specimens was better than that of controls. Percent of first grade boards of presteamed specimens was 20 percent higher than that of controls and percents of second and third grade boards of presteamed specimens were 15 and 5 percent lower than those of controls, respectively.
우왕의 정치에 대한 일고찰 - 출생배경과 폐위, 죽음을 중심으로 -
이형우 (사)한국인물사연구회 2011 한국인물사연구 Vol.16 No.-
King U (Monino) of the Goryeo dynasty clearly was King Gongmin’s son. Although the identity of his mother remains unclear, Monino’s status as King Gongmin’s son was officially recognized by the latter. In keeping with the wishes of King Gongmin, Monino began from his days as Crown Prince to be educated as the royal heir by members of the New Scholar-Officials (sinjin sadaebu) Baek Munbo and Jeong Chu. The Crown Prince proved himself to be very interested in his father’s governance methods during this training period. Despite some objections, Monino ascended to the throne following King Gongmin’s assassination with the support of all meritorious subjects. As such, King U was a monarch who possessed the necessary legitimacy. Although King U was the legitimate royal successor, politics during his reign was controlled by the coalition government composed of the force of Yi Inim and military officials led by Choe Yeong. However, instead of just accepting reality, King U continuously strove to establish royal authority-centered politics. However, the results of King U’s efforts differed greatly before and after the death of his nursemaid Lady Jang. Prior to the death of Lady Jang, King U strived to foster a support base using relatively legitimate methods. However, the king was left to fear for his life after these efforts were suppressed by the military coterie. From the 10th year of his reign onwards King U adopted the out of the ordinary approach of crafting a support base through marriage and the nurturing of advisors. However, the failure of the attempt to conquer Liaodong, an undertaking that King U had launched with his new political ally Choe Yeong, as a result of Yi Seonggye’s decision to withdraw from Wihwado placed King U on the inevitable path to dethronement. Still treated as a former king despite having been dethroned, King U became the alleged ringleader of the nebulous ‘Kim Geo Incident’ in which an attempt was made on Yi Seonggye’s life. Things began to change rapidly thereafter. In short succession, King U’s son King Chang was also dethroned, and the father and son were subsequently killed. In this end, related historical documents such as <Goryeosa (高麗史, History of the Goryeo Dynasty)> only contain basic descriptions of the process that led up to the execution of these two former kings. Furthermore, many of the contexts surrounding this story remain difficult to understand from a logical standpoint. Some scholars have argued that the claims regarding King U and King Chang’s lack of legitimacy (禑昌非王說), claims that served as the basis for Yi Seonggye and his group’s execution of these two kings, were in fact erroneous. Moreover, some have even advanced that the related Ming diplomatic document that served as the basis for this theory was in fact manipulated. That being said, few studies have been conducted on the illegitimate nature of the murder of these two kings. Moreover, no critical assessment of what the group behind this move stood to gain by manipulating this incident in terms of political benefits has ever been carried out. Here, the absence of such a study can be explained by the fact that the perpetrators were also those who would play the key roles in the founding of the ensuing Joseon dynasty regarded as the most significant ‘historical development’ of the previous 1000 years. However, there is a need to conduct a thorough analysis of the facts surrounding this case. The fact that no such analysis or reevaluation of this incident has to date been carried out can be regarded as proof positive of the veracity of the old saying that the ends justifying the means. The time has come to conduct a legitimate evaluation of figures such as King U who were killed during the process of the foundation of the Joseon dynasty.