• 한국음향학회지
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• 제19권3호
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• pp.11-19
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• 2000

본 논문에서는 가요 반주기의 육성 코러스 기능을 구현하는데 핵심적인 기능을 하는 반도체 칩 설계에 관한 내용을 다룬다. 육성 데이터는 많은 저장 용량을 필요로 하고 있으므로 압축이 필요하고, 반주기의 키 및 템포 변화에 따라 육성 데이터의 키와 템포를 변화시키는 것이 필요하다. 본 연구에서는 압축을 위해서는 MPEG-1 오디오 계층1, 키 및 템포 변환을 위해서는 SOLA(Synchronized Overlap and Add) 알고리즘을 적절하게 변형하였다. 변형된 알고리즘을 구현할 수 있는 ASIC(Application Specific Integrated Circuit)을 설계하고 FPGA로 검증한 후 칩으로 제작하였다. 제작된 칩은 실제 시스템에 응용되어 정상적으로 동작하는 것을 확인하였다.

• 한국엔터테인먼트산업학회논문지
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• 제15권7호
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• pp.33-43
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• 2021

본 연구는 뮤지컬 노래에 사용된 음악 형식인 Verse-Chorus 형식의 변용과 특징을 고찰하기 위함이다. 뮤지컬 노래의 음악 형식은 인물의 극적 상황을 관객에게 효과적으로 전달하기 위한 구조적 표현 기제이다. 연구를 위해 Verse-Chorus 형식과 변용을 탐구할 수 있는 대표적인 형식을 4개의 유형으로 나누고 각각의 특징을 살펴보았다. 첫째, 뮤지컬 초기의 단순한 상황과 인물을 설명하는 반복 형식인 Verse-Chorus 형식, 둘째, 단순한 인물을 설명하면서도 Bridge의 약간의 변형을 통해 분위기를 환기시키고 지루함을 탈피하기 위해 사용된 Verse-Bridge-Verse 형식, 셋째, Chorus 직전에 위치하여 Verse와 Chorus를 연결하고 드라마와 화성적 진행을 매끄럽게 하여 인물의 정서적 상승을 도모하는 Verse-Prechorus-Chorus 형식(Verse-Prechorus-Chorus Form), 마지막으로 인물의 복잡한 심경에 대한 갈등과 그에 대한 결정이 공존하는 상황을 나타내기 위해 사용된 확장된 Verse-BG대사-Chorus 형식에 대해 고찰하였다. 이처럼 뮤지컬 노래는 다양한 형태의 Verse-Chorus 형식이 사용되고 있다. Verse-Chorus의 형식성과 변용은 음악과 드라마 전개가 불균형의 상태가 되지 않는 음악의 논리와 극의 논리가 균형 상태를 이루게 한다. 본 연구를 토대로 뮤지컬 노래 형식 변용에서 나아가 음악 형식과 극 구조의 상관성에 대한 발전적인 연구가 이어지길 기대한다.

• 천문학회보
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• 제38권2호
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• pp.94.1-94.1
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• 2013

Whistler mode chorus waves, which are observed outside the plasmasphere of the Earth's magnetosphere, play a major role in accelerating and scattering energetic electrons in the radiation belts. In this study we developed a predicting scheme of the global distribution of chorus by using the Time History of Events and Macroscale Interactions during Substorms (THEMIS) satellite data. First, we determined global spatial distributions of chorus activity, and identified fit functions that best represent chorus intensities in specific L-MLT zones. Second, we determined the specific dependence of average chorus intensity on preceding solar wind conditions (e.g., solar wind speed, IMF Bz, energy coupling degree) as well as preceding geomagnetic states (as represented by AE, for example). Finally, we combined these two results to develop the predicting functions for the global distribution and intensity of chorus. Implementing these results in the radiation belt models should improve the local acceleration effect by chorus waves.

• Journal of Astronomy and Space Sciences
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• 제31권4호
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• pp.295-301
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• 2014

Whistler mode chorus wave is considered to play a critical role in accelerating and precipitating the electrons in the outer radiation belt. In this paper we test a conventional scenario of triggering chorus using THEMIS satellite observations of waves and particles. Specifically, we test if the chorus onset is consistent with development of anisotropy in the electron phase space density (PSD). After analyzing electron PSD for 73 chorus events, we find that, for ~80 % of them, their onsets are indeed associated with development of the positive anisotropy in PSD where the pitch angle distribution of electron velocity peaks at 90 degrees. This PSD anisotropy is prominent mainly at the electron energy range of ${\leq}$ ~20 keV. Interestingly, we further find that there is sometimes a time delay among energies in the increases of the anisotropy: A development of the positive anisotropy occurs earlier by several minutes for lower energy than for an adjacent higher energy.

• 한국산학기술학회논문지
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• 제18권12호
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• pp.310-320
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• 2017

본 연구의 목적은 지역아동센터 아동대상 합창프로그램이 인성 사회적 기술 그리고 문제행동 주의력결핍에 미치는 효과를 알아보고자 하였다. 연구의 대상은 수원시에 소재한 지역아동센터 주간프로그램에 참여하고 있는 초등학교 1학년에서 6학년까지 24명의 아동을 대상으로 하였다. 합창 프로그램은 2017년 4월 5일부터 7월 5일까지 회기 당 60분씩 12회기를 실시하였다. 본 연구의 결과는 다음과 같다. 첫째, 지역아동센터 아동의 합창활동 전후 아동의 인성에 대한 인터뷰에서는 학교에서 보다 센터에서 타인과의 관계와 리더십 있는 행동이 더욱 적극적으로 변화했다는 것을 알 수 있었다. 둘째, 지역아동센터 아동의 합창활동 전후 사회적 기술의 차이는 사회적 기술 전체와 하위변인 모두에서 통계적으로 유의한 차이를 보여 사회적 기술 변화에 효과가 있었음을 알 수 있다. 셋째, 지역아동센터 아동의 합창활동 전후 문제행동의 차이는 문제행동 전체와 하위변인 중 과잉행동에서만 유의한 차이를 보여 문제행동 개선에 어느 정도 효과가 있었으며, 특히 과잉행동에 효과가 있었음을 알 수 있다. 넷째, 지역아동센터 아동의 합창활동 전후 주의력결핍과잉행동장애의 차이는 주의력결핍과잉행동장애 전체 및 하위척도인 부주의와 과잉행동충동성 모두에서 통계적으로 유의한 차이가 있는 것으로 나타나 주의력결핍과잉행동이 전반적으로 개선되었음을 알 수 있다. 따라서 본 연구의 결과를 통해 합창 프로그램 활동이 지역아동센터 아동의 인성과 사회적 기술, 문제행동, 주의력결핍행동에 효과가 있었음을 증명하였다.

• 천문학회보
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• 제36권2호
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• pp.94.2-94.2
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• 2011

Electron microbursts, energetic electron precipitation having duration less than 1 sec, have been thought to be generated by chorus wave and electron interactions. While the coincidence of chorus and microburst occurrence supports the wave-particle interaction theory, more crucial evidences have not been observed to explain the origin of microbursts. We propose the measurement of energy dispersion of microbursts could be an evidence supporting wave-particle theory. During chorus waves propagate along magnetic field, the resonance condition should be satisfied at different magnetic latitude for different energy electrons. If we observed electron microbursts at low altitude, the arrival time of different energy electrons should make unique dispersion structures. In order to observe such energy dispersion, we need a detector having fast time resolution and wide energy range. Our study is motivated from defining the time resolution and energy range of the detectors required to measure microburst energy dispersions. We performed test particles simulation to investigate how electrons interact with simple coherent waves like chorus waves. We compute a large number of electron's trajectories and successfully produce energy dispersion structures expected when microbursts are observed with 10 msec time resolution detectors at the altitude of 600 km. These results provide useful information in designing electron detectors for the future mission.

• Journal of Astronomy and Space Sciences
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• 제31권4호
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• pp.303-309
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• 2014

The Earth's outer radiation belt often suffers from drastic changes in the electron fluxes. Since the electrons can be a potential threat to satellites, efforts have long been made to model and predict electron flux variations. In this paper, we describe a prediction model for the outer belt electrons that we have recently developed at Chungbuk National University. The model is based on a one-dimensional radial diffusion equation with observationally determined specifications of a few major ingredients in the following way. First, the boundary condition of the outer edge of the outer belt is specified by empirical functions that we determine using the THEMIS satellite observations of energetic electrons near the boundary. Second, the plasmapause locations are specified by empirical functions that we determine using the electron density data of THEMIS. Third, the model incorporates the local acceleration effect by chorus waves into the one-dimensional radial diffusion equation. We determine this chorus acceleration effect by first obtaining an empirical formula of chorus intensity as a function of drift shell parameter $L^*$, incorporating it as a source term in the one-dimensional diffusion equation, and lastly calibrating the term to best agree with observations of a certain interval. We present a comparison of the model run results with and without the chorus acceleration effect, demonstrating that the chorus effect has been incorporated into the model to a reasonable degree.

• 영어영문학
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• 제55권4호
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• pp.539-565
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• 2009

T. S. Eliot attempted the combining of the liturgy of Anglican Church and a drama in Murder in the Cathedral (1935) and created a modern verse drama which comes most close to the regular tragedy like Greek tragedy today. Eliot chose the drama to deliver his religious insight because of its ritualistic origin and its potentiality to deliver a dramatic world which can contain a complete order. The central theme of this play is the martyrdom. The dramatic action of killing the archbishop Thomas Beckett in this play, however, is not treated as important event enough to be a dramatic climax. He is portrayed as a witness to the reality of God's will rather than a man who wills to give up his own life for any religious belief or cause. In Eliot, a martyr is nothing but "a witness" in its ancient sense. This paper purposes to review the language of this play. The various and new meters and rhythms of the language of this play function enough to bring its playwright to encounter 'the real audience' in 'a living theatre'. The interactions between different verbal models also play a big role to make this play a living theatre. Eliot found the poetry which crosses the various classes and levels of the tastes of audience is the most useful poetry. And the poetry of this play proves as the very thing which intensifies the theme of the play and gives the most powerful force to the play. Especially Eliot's poetry succeeds smost in the various and free meters of chorus, which makes Eliot the first playwright since Aeschylus, who could bring the chorus to undertake the function of extending the dramatic action of the play into the universal meaning. In the theatre the real audience identifies themselves with chorus. And the chorus leads the audience to respond to peace which passeth understanding beyond words and sounds of this play, which is the desired response in Eliot's conception of drama.

• 대한음성학회:학술대회논문집
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• 대한음성학회 2005년도 추계 학술대회 발표논문집
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• pp.55-58
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• 2005

Music Summarization is to extract there presentative section of a song such as chorus or motif. In previous work, the length of music summarization was fixed, and the threshold to determine the chorus section was so sensitive that the tuning was needed. Also, the rapid change of rhythm or variation of sound effects make the chorus extraction errors. We suggest the linear regression for extracting the changeable length and for minimizing the effects of threshold variation. The experimental result shows that proposed method outperforms conventional one.

• 복식
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• 제62권5호
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• pp.125-137
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• 2012

This study examines the stage costumes of the creative musical 'Hyecho', which was performed six times in the Chung Ang Art Center hosted by Chung-Ang University's performance & media agency from December 20 to 22 in 2006. The stage costumes were made based on these basic design elements of stage costumes that were dyed : line, silhouette, material, and color. First, the creative musical 'Hyecho' presents a new form of fusion theatre, which blends Korean traditional music and dance with videos. Thereby, the musical has opened a new phase in Korea's creative performing arts. Second, in musical performances that combines dance and songs, stage costumes should be made not only to attract the audience's eyes, but also not to interrupt actors' vocalizations and movements by taking their physical features into account. Also, costumes should be made in consideration of their relationships with visual elements, including stage settings and lighting. Third, the musical features fusion-style stage costumes, which combines Hanbok, the Korean traditional costume, and Indian traditional costumes with modern costumes. For the line and silhouette, costumes show the beauty of curves through the curves of Hanbok and India's traditional costumes and also through irregular pleats of pants. Also, by using cotton materials, which is easy to dye and not readily deformed, costumes feature colors that are found in nature through a gradation dyeing technique. In doing so, it offers visual amusement to the audience by making stage costumes look like a beautiful painting. Fourth, the stage costumes of the chorus feature costumes that use lining and pleated skirts using belts, and various accessories, including necklaces that use strings in order to express evil spirits. Since there is not much time to change costumes during a performance, using such items are helpful to show the unique characteristics of actors effectively during the limited time. Also, coordinating with the lighting director allows the costume designer to make better costumes for the chorus and make the performance more dramatic. Finally, it was not necessary to wash the costumes of the chorus of the fusion musical Hyecho 2006 since it was performed only six times. However, when using dyed costumes for the long-term performance, it might cause problems such as bleaching that result from the washing of costumes and low durability that can result in the deformation of costumes. As performing arts are made in various forms and are diversified, it is needed for stage costumes to change accordingly through new attempts and various ways of expression.