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윤병우 慶星大學校 1998 論文集 Vol.19 No.2
The system which can display korean and english fonts at 320x240 dots LCD with SED1330F LCD controller. The implemented fonts size of korean are 16 x 16 pixels, and english are 8x16. The microprocessor which controls SED1330F is 80C51. The implemented system may be used as the display equipment of automatic control system and various terminals.
윤병우 慶星大學校 1998 論文集 Vol.19 No.1
LA1883 is a chip which includes FM front end circuits, intermediate frequency transforming circuits, noise canceller, MPX, and AM/FM exchanging switch. In this paper, AM/FM tuner system is implemented with LA1883 chip which can be used at car stereo system. At the implemented FM tuner, the actual sensitivity was 8dB, and signal to noise ratio was 55dB. At the AM tuner, the actual sensitivity was 26dB and signal to noise ratio was 46dB.
윤병우,신윤기,성굉모,Yoon, Byung-Woo,Shin, Yoon-Ki,Sung, Koeng-Mo 한국음향학회 1989 韓國音響學會誌 Vol.8 No.4
수중 채널은 그 음향학적 특성상 물의 깊이, 온도 분포, 염분포 등의 환경적 특성과 수위의 경계조건, 표면 상해 등 지형적 조건들로 구성되는 시면 시스템(time varying system)으로 볼 수 있다. 특히 천해(shallow water)의 경우 물표면과 바닥이 하나의 도파관 구실을 하게되므로 multipath reflection으로 인한echo 현상이 심각하다. 따라서 천해에서의 수중 통신은, time varying multipath fading 특성의 수중 채널에 의해 왜곡된 음향 신호를 등화(equalizing)시키는 것이 수중 통신의 질을 높이는데 결정적이라 할 수 있다. 본 논문에서는 주파수 영역 적응 필터를 채택하여 Inverse modeling 기법으로 수중채널을 등화시키는 시스템을 제시하였으며 시뮬레이션으로 이들의 타당성을 조사하였다. Underwater channels can be regarded as time-varying systems in view of the acoustical characteristics due to the fact that the characteristics of the channel are affected by the environmental and geometrical conditions. Especially in shallow water case, the surface and bottom conduct as a waveguide so echo effect due tu the multipath reflections are severe. Therefore in shallow water communications, it is very important to equalize the transmitted signals distorted by the underwater channels with time-varying multipath fading. In this paper an equalizer system which employs the frequency domain adaptive filter to equalize the channels using inverse modeling technique is introduced.
윤병우 경성대학교 생산기술연구소 1997 생산기술연구지 Vol.4 No.-
In the analysis of underwater acoutic signal source and design of similar signal synthesizer, underwater acoustic signal was obtained by A/D converter. The obtained signal was separated to tonal components and broadband noises by the ATW algorithms. The noise generation filter, which can generate the noises similar to the analyzed broadband background noise, was designed by Hilbert Transform. After that, the system which can generate the signal which is similar to moving vessel noises is designed by synthesizing the generated noises and the analyzed tonal components. This system can be used to field maneuvers, and it can cheat enemies and escape from the tropedo attacks.
L.v. Beethoven Piano Sonata Op.2,No.1의 暗譜을 위한 分析硏究 : 제1악장을 중심으로
尹柄祐 서울市立大學校 1990 論文集 Vol.24 No.-
The memorizing of music scores is a critical element for playing piano among other important musical factors. Without a confident memorization, a pianist can not be competent and often fails to complete a performance. This simple fact is nothing but a common sense, which is not, however, clearly recognized and well-practised. The memorizing of piano music scores is more difficult than that of monophony scores. The reason is that the piano as a musical instrument is not a simple monophony instrument, but plays polyphony music. Therefore piano music scores have features of condensed form of a chamber music or a symphony at times. The scores of piano music can be hardly memorized before a thorough analysis of the composition technique, regularity and harmony. Another essential element for a food piano playing is the fingering method. The rational and economical fingering can enhance the musical effect. Hence the continued search for a good fingering will improve both performance ability and musical effect. In addition to the memorizing of scores, it is also important to memorize the playing method concerning musical expression marks, dynamics, articulation and phrasing. The memorization of playing method is essential to convey the vitality of the composition. Otherwise, a pianist can only repeat a dull mechanical array of scores on the keyboard without his or her own interpretation of the composer's intention. The practice of memorizing music scores should not begin with a complicated piece of large-scale. It would be desirable to start from simple pieces and then move to sophisticated ones. As for a large-scale piece, and attempt to memorize the entire scores at once is not preferrable. A more productive method is to break it into several smaller segments for an easier memorization. Once accustomed to this method of practice, one can readily memorize a long sophisticated piece. Such an effort of score memorization will help to deepen the understanding of a musical effect of score memorization will help to deepen the understanding of a mucial composition. moreover, the pianist can increase his or her confidence and produce a greater musical effect in actual performance. A thorough examination and careful analysis of music scores leads to an unmistakable memorization which in turn insures a dynamic performance. As for an analysis, the present paper takes Beethoven's piano sonata, Op. 2, No. 1, which is not large in scale, but requires a variety of techniques. A mastery of this sonata can be made possible with the memorization of the scores as suffested so far.