In order to clarify the enhanced sintering behavior of nanostructured(NS) W-Cu powder prepared by mechaincal alloying, the sintering behavior during heating stage was analysed by a dilatometry with various heating rates. The sintering of NS W-Cu powders was characterized by the densification of two stages, having two peaks in shrinkage rate curves. The temperature at which the first peak appear was much lower than Cu melting point, and dependent on heating rate. On the basis of the shrinkage rate curves and the microstructural observation, the coupling effect of nanocrystalline W-grain growth and the liquid-like behavior of Cu phase was suggested as a possible mechanism for the enhanced sintering of NS W-Cu powder in the state.

본 연구에서는 오스테나이트계 스테인리스 강재(STS 304)에 대해 NaCl 환경 중에서 틈부식 특성을 연구하기 위해, 정전압 분극장치에 의해 분극특성시험을 실시하여 NaCl 용액의 농도에 따른 STS 304 강재의 틈부식에 의한 분극 거동에 대해 연구한 결과는 다음과 같은 결론을 얻었다. 1) 틈부위는 심하게 부식되고 틈의 인접한 외부 표면은 부동태화된다. 2) 오스테나이트계 스테인리스강재인 STS 304 강재는 분극거동에 있어서 부식 전위는 3.5% NaCl까지 농도가 증가할수록 귀전위화되다가 농도가 3.5%이상으로 증가할수록 오히려 비전위화된다. 3) 부식 전위하에 전류밀도는 NaCl 농도가 3.5%까지 증가할수록 더 많이 배류되다가 3.5% 이상으로 증가할수록 오히려 더 적게 배류된다.(이 논문의 결론(요약) 부분임)

This study proposes to venture into the common elements and differences in both W.B. Yeats’s and Derek Walcott’s poems. It has been said that the young Walcott was sympathetic to the Irish writers, such as Synge, Pearce, Yeats, and Joyce, because he intended to make himself master of the themes and rhythms of the exile or castaway that the Irish writers echoed in their works. Of the Irish writers, Yeats was especially a poet who a little more previously wrote of the same issue as the young Walcott tried to and the young poet’s attention was deeply caught in the Yeatean poetics, more specifically, in the Yeatean mask which echoes a solitary self as an artist. Walcott’s Crusoe as a poetic self echoes the Yeatean mask. More specifically, it is a parallel for a poet with his daily ritual of the poet creating a new poem in the desperately isolated island. It is believed to be created by Walcott’s comparing himself and his own country to Yeats and Ireland in terms of an exile, a castaway or a lost self, which reflects a solitary and artistic figure in his poems, such as in “Crusoe’s Island” and “As John To Patmos”. Despite this fact, Walcott is also a poet who has built up the self-figure on a different base from Yeats’s heroic or aristocratic self. His poems are based on the Caribbean multi-racial background characteristic of slavery, poverty, lost hope, and lost identity that have resulted from the colonial policy of the British government that stepped into the Spanish and the French shoes. His Caribbean figure is a poverty-stricken, obedient, but patient, willful castaway, with his thick lips tightly closed. Although Walcott is a poet who has developed his own poetic self on the Yeatean base, which resulted in his fruitful poems, it is believed that he made greater efforts to weave the Caribbean spirit into poems than others. Then, the Caribbean tropical landscapes, such as sea, wood, and sun, etc. are a poetic space which sublimated his themes into the Caribbean soul.

살충제와 방사선이 자주달개비 수술털 돌연변이에 미치는 복합적 영향을 평가하였다. 포트에서 생육된 Tradescantia 4430 식물체에 코발트 선원으로부터 0.3, 0.5, 1.0 및 2.0 Gy의 감마선을 조사하였다. 살충제는 감마선 조사 24시간 전에 농업용으로 사용되는 파라치온 유제를 살포하였다. CT 실험군과 Pa+γ실험군에 있어서의 돌연변이 빈도가 증가한 고조기간은 방사선 조사 후 7 ~ 11일로 돌연변이 빈도는 방사선량 증가

This study analysed national data of manpower supply for physical therapists in Korea. Based on the comparative analysis results of the future demand and supply, as of May 1998, it is estimated that there was already an oversupply of physical therapists in Korea. This oversupply is expected to continue even though there would be an increase in hospital beds, rehabilitation facilities for the elderly, and nursing homes. Thus it would be desirable to cut down the number of students admitted to physical therapy schools each year. Our estimation shows that the Ministry of Health and Welfare must take measures to reduce the supply of physical therapist as soon as possible.

The purpose of this thesis is a searching out the characteristics of Japanese dwellings implanted into Korea in the time of the rule of Japanese imperialism and its influences on Korean modern dwellings especially in the time of 1930's. At the early stage of the colonial time(1905~1919), the central corridor type Japanese dwellings were implanted into Korea for the Japanese official residences. The central corridor type Japanese dwelling was an urban modern dwelling compromised between Japanese style and western style and distinguished by an outer-court type plan, Japanese entrance hall, central corridor and western style reception room. After the 1920's the central corridor type Japanese dwellings have spreaded itself and became a prototype of a modern dwelling in Korea. The characteristics of the central corridor type Japanese dwellings have influenced on the Korean high class dwellings and Korean architects' proposals for modern dwelling in the time of 1930's. By the implantation and spread of the central corridor type Japanese dwellings, Korean modern dwellings at the same time have affected and undergone transformation. The aspects of transformation were ; The outbreaking of the Japanese style entrance and central corridor, the transformation of MaDang from the inner court with a function of circulation into the outer court garden with plants and the transformation of Korean dwellings from the rural inner court type into the urban outer court type. The central corridor type Japanese dwellings implanted into Korea in the time of the rule of Japanese imperialism makes function as a precedent of a modern urban dwelling to Korean and makes Korean dwellings transform from the rural inner court type into the urban outer court type.

A 230 GHz SIS tunnel junction receiver has been being developed for radio astronomy in Nagoya University. In this heterodyne receiver, we use a $\~$ 수식 이미지1/3 reduced hight rectangular waveguide SIS mixer with two tuning elements as front end. The mixer block with SIS junction was cooled to 4K with a closed cycle He-gas refrigerator. So far, a double sideband receiver noise temperature lower than l00K in 222-237 GHz is obtained. The receiver exhibits a best DSB noise temperature of 69K at 236 GHz as well as 228 GHz.