• Journal of the Korea Institute of Information and Communication Engineering
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• v.13 no.11
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• pp.2273-2276
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• 2009

As parents are interested in music education for infants in these days, they require systems to help these infants to actively play music. In this paper, we propose a keyboard solo system using a real time hand recognition method. In order to enable the infants to use the system easily, the proposed system plays some sounds whenever the infants move their fingers on a paper piano. For the purpose of minimizing cost to play music, the proposed system utilizes a general PC with only a paper piano, a web camera, and a speaker. With the aim of precisely and efficiently recognizing both a hand and each key on keyboard, the proposed system divides a recognition step into a hand recognition step and a keyboard recognition step. Also, the hand recognition step considers only skin color, and the keyboard recognition step considers only black and white without other colors.

• Journal of Digital Convergence
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• v.15 no.6
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• pp.377-383
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• 2017

In this thesis, Improvisation of Jazz Vocal that can be characterized as Jazz music, namely practice of Scat suggest that way of applied approach that root position of chord and chord tones. Scat plays a solo using reproduced tunes of meaningless scat syllable that is not use the lyrics and melodies, which are written in a score. For this, Using the root position of chord is a reference point that Jazz vocal constructs a musical melody. Singing person can develop that reference point from simple scat to develop increasingly complex scat and can express that musical expression and communion. It analyzed the music functionally with a standard Jazz music 'All of me' as the center from composition of chord tone that improvise song to bass line, bass scat, analysis of chord tones arpeggio and expression. In this thesis, the improvisation of a Jazz vocal that may seem somewhat abstruse and complex could be relatively easy to construct through a gradual approach.

• Journal of Music and Human Behavior
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• v.7 no.2
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• pp.1-22
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• 2010

The purpose of this study is to examine the effectiveness of the group piano playing program, which was a part of psycho-emotional support program, on international marriage immigrant women's self-efficacy. For this case study, five international marriage immigrant women from "N Multi-culture Supporting Agency" were agreed to participate in the study. The group piano playing program was implemented for ten sessions. Each session took place once a week for ten weeks. In order to examine the effects of self-efficacy on the participants, both quantitative and qualitative methods were used as a mixed methods research design. As a result, the participants' self-efficacy average score was statistically significant (p< .05). Also, qualitative analysis of participants' verbal and behavioral response showed positive changes in their level of self-efficacy. Therefore, the results of this study suggest that the group piano playing can facilitate as an effective intervention to promote the self-efficacy on international marriage immigrant women.

• Journal of the Korea Society of Computer and Information
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• v.18 no.2
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• pp.95-105
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• 2013

The music education improves the creative talent, social skills and academic achievement of the students. For the efficient music education, it is requested to develop the collaborative educational learning tools, especially electronic collaborators suitable to the leaner's study patterns and speed. In this paper, we propose a new method to develop a PC-based self learning software for the flute performance using templates and descriptors to make the contents form and substance. Our proposed method can allow user to modify the descriptors to match the contents to his level. We implemented a PC-based self learning software for the flute performance compactly and a feasibility test showed the efficiency of our proposed method to construct a self learning tool to play the flute and the tool can be utilized for the beginner to learn playing flute.

• Journal of Sensor Science and Technology
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• v.5 no.3
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• pp.25-31
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• 1996

Steel wires are made by elongating hot billets. If the billets have internal or surface defects, the wire can be broken during elongation process. After testing surface defect, we are testing internal defect by ultrasonic transducers. POSCO is producing two kinds of billets, hot rolled billet and cast billet. Hot rolled one is denser than cast billet. Because of the low density and rough surface, ultrasonic testing is difficult for the cast billet. Size of the transducer was related with the size and density of the billet. A transducer having 21mm long, 8.5mm wide and 0.95mm thick piezoelectric ceramic plate was best for $160mm\;{\times}\;160mm$ cast billet. Center frequency of the transducer was 2.25MHz and the focus distance was 70mm.

• Journal of Korea Entertainment Industry Association
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• v.13 no.7
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• pp.119-133
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• 2019

This study has researched the effect how ukulele performance of middle-aged women effects daily hassles and life satisfaction. This study has surveyed middle-aged women from 40 to 64 years old aimed at 300 members in ukulele performance club throughout the country using structured questionnaire. Collected data have been analyzed through multiple regression analysis and regression analysis of 3 steps with spss 22.0 statistical program. The analyzed results are as follows. First, the number of times and the period of playing the ukulele by middle-aged women have a negative effect on their daily hassles. Second, the number of times and the period of playing the ukulele by middle-aged women have a positive influence on their life satisfaction. Third, the period of playing the ukulele has a partial mediated effect on life satisfaction. The number of playing has a complete mediated effect on life satisfaction.

• The Journal of the Acoustical Society of Korea
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• v.14 no.3
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• pp.82-89
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• 1995

A sound field simulator is constructed to obtain the sound field paramaters such as the magnitudes and directions of early reflections with moderate efforts. The proposed simulator is based on the hybrid ray tracing method that traces rays reached the listener position and convert them to image sound sources. By this approach, we can obtain the directional impulse response relatively easily with minimum casts. Simulation experiment results of several performace places are reported to how the versatility of the proposed simulator system.

• Proceedings of the KAIS Fall Conference
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• 2012.05a
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• pp.285-288
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• 2012

많은 해 동안 기타를 배우는 학생들은 거의 한 가지 방식으로 기타 지판을 습득해왔다. 바로 '근음기준 코드 톤 방식'이 그것인데 기타 상에서의 코드 톤 모양을 이해하는 데는 매우 유용한 방식이기도 하다. 그러나 오랜 음악 교육 경험에서 가이드 톤 기준 방식과 비교해 볼 때 근음기준 연습 방식에서 문제점이 발견되었다. 따라서 어떤 방식이 학생들이 멜로디적인 즉흥연주를 할 때 더 효과적인지 증명하기 위한 실험이 이루어졌다. 이 연구에서는 기타교육에 대한 해답을 얻고자 함이 아니라 초기 연습이 어떻게 멜로디적인 연주와 음악적인 연주에 영향을 주는지에 그 초점이 있다 하겠다.

• Proceedings of the Korean Society for Technology of Plasticity Conference
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• 1999.05a
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• pp.66-74
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• 1999

일반적으로 압출용 빌렛트제조에는 빌렛트상하의 품질변화로 수평연속주조법이 사용되지 않고 있지만 전자기교반법을 이용할 경우 이러한 단점이 없어진다. 따라서 전자기교반장치를 설치한 수평연속주조장치를 이용하여 연주빌렛트를 제조하였다. 최대자속밀도가 1000Gauss 인 전자기교반장치를 설계 제작하였으며, 간접냉각방식의 흑연몰드에서 알루미늄합금을 사용하여 건전한 연주빌렛트를 제조할 수 있는 여러 공정조건을 조사 검토하여 직경 70mm의 기포가 없고 표면이 미려한 등축정을 가진 연주빌렛트를 제조하였다. 인출속도에 따른 수평 연속주조 빌렛트의 표면, 용탕유동라인 및 조직을 검토한 결과 평균인출속도 20mm/min에서 40mm/min까지 아주 미려한 표면특성을 가졌으며, 인출속도가 빠르면 유동라인이 표면에서 중심 쪽으로 완만한 기울기를 가지게 되어 표면응고층이 얇아져 빌렛트가 고액계면에서 끊어지게 되며, 조직미세화는 인출속도가 클수록 미세화되었으나, 결정구상화정도는 인출속도가 빠를수록 악화되었다.

• The Journal of the Korea institute of electronic communication sciences
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• v.9 no.9
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• pp.999-1004
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• 2014

This intelligent keyboard instrument self learning system developed in this study consists of smartphone based learning application and keyboard-instrument auxiliary module. The keyboard instrument auxiliary module receives playing information of the instrument through smartphone application and bluetooth communication. Then the module shows it through LED display so that the relationship between the keyboard and scale could be easily recognized even for beginners. Also, this system provides saving function and analyzing function of user's performance data, making learning more effective.