• Proceedings of the KSPS conference
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• 2006.05a
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• pp.143-146
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• 2006

Music is now digitally produced and distributed via internet and we face a huge amount of music day by day. A music summarization technology has been studied in order to help people concentrate on the most impressive section of the song andone can skim a song as listening the climax(chorus, refrain) only. Recent studies try to find the climax section using various methods such as finding diagonal line segment or kernel based segmentation. All these methods fail to capture the inherent structure of music due to polyphonic and noisy nature of music. In this paper, after applying moving average filter to time domain of MFCC/chroma feature, we achieved a remarkable result to capture the music structure.

• Proceedings of the IEEK Conference
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• 2000.07a
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• pp.306-309
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• 2000

We developed an electronic music glove (EMG) system that could play musical scores in real time processing. The EMG system interfaces with the signal coming from the controller to the sound card in the computer. The computer, according to the status of the finger and foot switches, generates the signals to the speaker systems using the application C++ program by making use of MIDI message. The EMG systems can control up to several octave notes and duration of sound, and several musical performance expressions such as chorus, reverberation, rhythm, and volume. Finally, our EMG could play the performance of simple music depending on the choice of any kind of musical instruments in the sound card in computer systems.

• The Journal of the Acoustical Society of Korea
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• v.21 no.2
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• pp.128-133
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• 2002

We developed a electronic music glove (BMG) system that plays musical scores in real time processing. The EMG system interfaces with the signal coming from the controller to the sound card in the computer, The computer, according to the status of the fingers and foot switches, generates the sound signals and sends them to the speaker systems through the application C++ program and MIDI message. The EMG systems control the velocity and duration of sound and several musical performance expressions such as chorus, reverberation, rhythm, and volume. Finally, we implemented the digital drum set using: the EMG system as example.

• The Bulletin of The Korean Astronomical Society
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• v.37 no.1
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• pp.90.1-90.1
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• 2012

Understanding the dynamics of relativistic electron acceleration, loss, and transport in the Earth's radiation belt during magnetic storms is a challenging task. The U.S. National Science Foundation's Geospace Environment Modeling (GEM) has identified five magnetic storms for in-depth study that occurred during the second half of the Combined Release and Radiation Effects Satellite (CRRES) mission in the year 1991. In this study, we show the responses of relativistic radiation belt electrons to the magnetic storms by comparing the time-dependent 3-D Versatile Electron Radiation Belt (VERB) simulations with the CRRES MEA 1 MeV electron observations in order to investigate the relative roles of the competing effects of previously proposed scattering mechanisms at different storm phases, as well as to examine the extent to which the simulations can reproduce observations. The major scattering processes in our model are radial transport due to Ultra Low Frequency (ULF) electromagnetic fluctuations, pitch-angle and energy diffusion including mixed diffusion by whistler mode chorus waves outside the plasmasphere, and pitch-angle scattering by plasmaspheric hiss inside the plasmasphere. We provide a detailed description of simulations for each of the GEM storm events.

• Animal cells and systems
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• v.2 no.4
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• pp.463-469
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• 1998

Hyla japonica males were observed to produce two distinctively different types of mating calls: advertisement call to attract conspecific females and encounter call to keep off potential competitor males. Whereas advertisement calls were organized in bouts of calls or notes, encounter calls were usually produced as separate calls. Encounter calls were much longer and had more pulses per call than advertisement calls. However dominant frequencies or pitches of the two calls did not differ significantly. Hyla Japonica males exhibited considerable plasticity in their calling behavior. They altered both qualitative and quantitative properties of their calls in response to other calling males. Sometimes, they even switched from producing advertisement calls to encounter calls. Advertisement calls produced by chorusing males were shorter in duration and thus move calls per bout than those produced by lone males. Males also produced much lower-pitched calls when calling together with other males. Considering that low pitch calls are often Highly correlated with body size, it is possible that H. japonica males may try to generate deceptive calls to indicate the size greater than the actual.

• Bulletin of the Korean Space Science Society
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• 2009.10a
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• pp.43.2-43.2
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• 2009

Electron microbursts are the intense electron precipitation which durations are less than one second. We measured the energy spectra of the microbursts from 170 keV to 340 keV with solid state detectors aboard the low-altitude (680km), polar-orbiting Korean STSAT-1 (Science and Technology SATellite). The data showed that the loss cone at these energies is empty except when microbursts abruptly appear and fill the loss cone in less than 50 msec. This fast loss cone filling requires pitch angle diffusion coefficients larger than ~ 10-2rad2/sec, while ~10-5 rad2/sec was proposed by a wave particle interaction theory. We recalculated the diffusion coefficient, and reviewed of electron microburst generation mechanism with test particle simulations. This simulation successfully explained how chorus waves make pitch angle diffusion within such short period. From considering the resonance condition between wave and electrons, we also showed ~ 100 keV electrons could be easily aligned to the magnetic field, while ~ 1MeV electrons filled loss cone partially. This consideration explained why precipitating microbursts have lower e-folding energy than that of quasi-trapped electrons, and supports the theory that relativistic electron microbursts that have been observed by satellite in-situ measurement have same origin with ~100 keV electron microbursts that have been usually observed by balloon experiments.

• The Bulletin of The Korean Astronomical Society
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• v.37 no.2
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• pp.132.1-132.1
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• 2012

Radiation Belt Environment (RBE) model has developed to understand radiation belt dynamics as it considers whistler mode hiss and chorus waves which is responsible for relativistic electron acceleration and precipitation. Recently, many studies on electron loss by pitch-angle scattering have reported that elctromagnetic ion cyclotron (EMIC) wave is also responsible for main loss mechanism in dusk and equatorial regeion. Here, we attempt to incorporate EMIC into RBE model simulation code to understand more detailed physical dynamics in Radiation belt environemnt. We compare this developed model to data during storm events where both of electron loss and EMIC waves were detected.

• Journal of the Korea Convergence Society
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• v.8 no.6
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• pp.299-309
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• 2017

The study was aimed at finding an effective use of para-languages, which are important to communicate the meaning of the korean choral music. Para-language is a nonverbal communication that contributes to the delivery of a more expressive language. In choral music, vocalization and diction are important para-languages. Until now, the conductors emphasized vocalization rathe than diction while focusing musical expression in chorus. However, vocalization and diction are not distinct. This study suggested effective choral vocalization and diction technique through the convergence of experience as conductor and knowledge of communication theory.

• Journal of Digital Convergence
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• v.17 no.3
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• pp.55-61
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• 2019

Multimedia materials were developed to creative children's songs to elementary schoolers so as to improve favorable personality. To this end, we selected elementary school students to select appropriate songs for the cultivation of humanity, and produced multimedia including various image materials such as animation, documentary, chorus, dance performances, and interviews. Above all, we have created a teaching - learning process and presented the program so that teachers can easily guide students to agitation. As a result, the change of personality of elementary school students was positively shown through sway broadcasting, and I tried to give practical examples of practical application for cultivation of creativity and personality that should be emphasized at elementary school.

• The Journal of the Acoustical Society of Korea
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• v.26 no.7
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• pp.334-342
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• 2007

This paper presents an algorithm for the automatic detection of chord names, scales and tonalities from music file, expressed in MusicXML format which has enough information to determine harmonies vertically like 4-part choir. Chord names are absolute names which can be used and analysed independently of the tonality An algorithm selecting the best chord name is described, which can decide the most appropriate one from ambiguous situations. Candidate musical scales are extracted using the notes in a given time window. The tonalities of the music are determined using the chord names and candidate scales. The final output format of the process is also MusicXML file with chord names, marked non-harmonic notes, relative harmonic symbols and tonalities.