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Arnold Schoenberg의 초기 무조음악 : 「Op. 19, 여섯개의 피아노 소품」을 중심으로 Mainly on Op. 19, Six Little Piano Pieces
李誠載,白美英 서울대학교 1975 서울대학교 論文集 Vol.20 No.-
Today, the name of Arnold Schoenberg (1874-1951) is instantly associated with the twelvetone system by many musicians. Furthermore, even the technical procedure of the system is widely understood. Schoenberg started his way on the ground of Brahms, Wagnertradition. But from the beginning, he seeked a new means of organizing music which was free from the banalities of classical tonality. Thus twelvetone technique was fermulated in 1921 and in 1923 his first telvetone composition was published. This paper is concerned with Schoenberg’s early pretwelvetone works, especially Op. 19, in order to understand a historical significance of his new method which is generally accepted as a matter of fact. The analysis of the work shows that it is atonal without employing twelvetone technique. Instead of a theme in old sense and tonality, the use of individualized melodic, rhythmic details, and spatial relations integrates a whole work. By avoiding the use of a familiar chord or repeated note within a figure, he could concentrate on every interval, every sound, every rhythmic figure, every aspect of music and this led eventually to the twelvetone method.
시뮬레이션 분석 및 신뢰성 시험결과의 비교분석을 통한 피에조 센서의 피로강도 분석 및 예측
이성재,임성용,이영주,임홍우 한국신뢰성학회 2015 한국신뢰성학회 학술대회논문집 Vol.2015 No.5
국내·외적으로 지능형교통시스템(ITS) 시장이 확대됨으로써, 교통량조사시스템(AVC)의 보급이 증가하고 있으며, 데이터를 수집하는 센서부에는 피에조 필름을 이용한 피에조 센서가 사용되고 있다. 이러한 중요한 역할을 맞고 있는 피에조 센서의 외피를 구성하는 금속(동) 재질은 내부의 피에조 필름을 보호하고 기밀성을 유지하는 역할을 하고 있으며, 금속(동)의 파손은 피에조 센서의 심각한 고장을 초래 할 것이다. 본 논문에서는 피에조 센서의 외피를 구성하는 금속(동)의 단면형상을 분석하여, 시뮬레이션을 통한 구조해석 기법을 이용하여 피로강도를 분석하였으며, 반복하중내구시험을 통한 피로파괴 결과와 비교분석하였다. 또한, 비교분석의 결과를 바탕으로 제조공정에서 나타나는 다양한 형태의 단면 형상을 시뮬레이션을 통하여 구조해석을 함으로써 제조공정에서의 품질관리를 향상시키는데 기여할 것으로 예상된다.
이성재,김정석,강명창,정연식,정규동 한국공작기계학회 2003 한국공작기계학회 춘계학술대회논문집 Vol.2003 No.-
This study deals with the source location method of defect which can be occurred in structure. The existing methods was very difficult to be applied to predict it, because of using very complex numerical formula. The triangulation method which was proposed in this study can predict the source location predicted easily with small amount of data. Wave arrival time data can be directly converted into source-sensor distance is known. For this purpose, the propagation velocity was measured by Rayleigh wave, and the propagation behavior was analyzed. For the consideration of jointed part in structure, the source location method was applied to the welded workpieces. The signal propagation velocity was measured in welding part for the purpose of application to the part, and the revised algorithm of source location was proposed.
李聖載 水原大學校 1997 論文集 Vol.15 No.-
The filling processes of resin transfer molding for the manufacturing of polymer composite materials were numerically analyzed by the use of the finite difference method based on boundary fitted coordinate systems. Composite grids with dynamic moving meshes were particularly suitable for irregular geometries and multiple domains. Along the pseudo-boundaries interfacing composite grids, rigorous control volume scheme was implemented for the mass conservation. Several tests were performed for the complex mold composed of double gates and stiffeners including variable gap thicknesses and permeabilities. Numerical results demonstrated the applicability of dynamic moving mesh scheme with composite grids in achieving accurate modeling of the flow front without interpolation or double grid scheme that were common in fixed mesh schemes.
고무강화 폴리스티렌과 유기화된 층상 실리케이트 나노복합재료의 합성 및 물성
이성재 수원대학교 산업기술연구소 2002 산업기술연구소논문집 Vol.17 No.-
Polymer/clay nanocomposites are potential materials with attractive properties such as improved stiffness, dimensional stability, barrier resistance, thermal stability and flame retardency. Many researches have focused on the property improvement of thermoplastics such as polystyrene with organically modified layered silicates, but open literatures have not been yet found on the rubber-toughened polystyrene by the author's knowledge. High impact polystyrene (HIPS) is known as the rubber-toughened polystyrene to improve the impact strength and toughness of glassy polystyrene. Current research issues of HIPS include high performance HIPS such as glossy, transparent, chemical-resistant, high strength and flame-retardant grades. Naturally, the introduction of clay would be one of good candidates to achieve these purposes. In this study, the preparation of HIPS/organically modified layered silicate nanocomposites by in situ polymerization is presented and the characterization techniques of the material are also discussed. Major attention will be focused on the dispersion of silicate layer and the change in rubber particle size affected by the clay loading.