A series of high resolution spectra of CH Cygni obtained at the Bohyunsan Optical Astronomy Observatory (BOAO) in April 2004 has been analyzed. The emission components of the [O I] 6300 A lines are de-convoluted and fitted with Gaussian functions in order to investigate the characteristics and the structure of CH Cygni system along with the analysis for Hα and [O III] lines. A present geometrical structure of the components of CH Cygni system is suggested.

The box culvert is one of the simple and common structures employed repetitively in construction field. Although parametric computer applications have demonstrated a significant amount of time savings in designing simple and repetitive structures, circulating resultant electronic documents among project participants has not been fully integrated with these applications. This paper presents a development of Web applications to improve the process of a box culvert design and document management using XML and SVG. We developed a parametric Web application in order to facilitate not only engineering design of the box culvert but also management of resultant documents over the Web. This paper presents how XML Data Island and SVG were utilized to generate engineering drawings and display them in the Web page.

This study attempted to look into the second language (L2) learners' attitude toward and perception of their L2 pronunciation, and make suggestions for L2 pronunciation teaching within English as an international language (EIL) perspective which is theoretically supported by the variationist approach and multi-competence model of the sociocultural framework. Based on the qualitative analysis of what English as a second language (ESL) learners had discussed through individual interviews, the study showed how they perceived the importance of pronunciation, as well as revealed what kind of difficulties and obstacles they had faced in improving their pronunciation skills. It also indicated the types of efforts and strategies that the learners employed to improve pronunciation skills. The research findings made known the factors driving L2 learners to commit themselves to refining their pronunciation skills. Having considered the unique status of EIL as well as respected the identity of EIL speaker as multi-competent language user, the study made suggestions as to what should be taken care of for L2 pronunciation teaching.

고준위 방사성폐기물 처분장에서 적용하고 있는 다중 방벽의 한 부분인 처분 용기는 벤토나이트 완충재의 팽윤과 지압으로부터 폐기물을 역학적으로 안정하게 보호함과 동시에 일정 기간 방사성폐기물의 유출을 억제하는 역할을 한다. 처분용기의 건전성은 엄격한 재질 선정과 품질 보증을 통해 확보된다. 그러나 용기 제작 과정이나 수송 중 예상치 못한 사건으로 인해 불량 용기가 발생할 가능성이 있다. 본 논문에서는 이와 같은 경우 방사성폐기물로 인해 생태계에 미치는 환경 영향을 연간 개인 선량으로 평가하였다. 연구결과 일부 불량 처분 용기가 발생하더라도 현 평가에 사용한 입력 데이터 범위에서는, 국내 고준위 방사성폐기물 처분 개념이 방사선적 안전성을 확보할 수 있는 것으로 판명되었다.