• Journal of Korea Entertainment Industry Association
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• v.14 no.5
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• pp.159-170
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• 2020

Despite evidence that early childhood teachers play a critical role in guiding children through their child assessment, most beginning teachers in the survival stage face the greatest difficulties in this area. Using the intentional and purposeful tools of action research, this collaborative action study supports a beginning teacher in reflecting upon her perceptions of the 'child assessment' of young children and devising and evaluating good guidance practices. During the course of the study, the participating teacher became engaged in more reflective teaching which prompted her to perceive the "child assessment" of the children from different perspectives. As her understanding of the importance of making her curriculum and classroom climate more engaging and meaningful deepened and she reconceptualized her notion of child assessment, the teacher witnessed positive changes in her students' behaviors which, in turn, increased her sense of efficacy. These very positive, empowering results are strong recommendation for using collaborative action research especially in the novice years of teaching for it provides the teacher with a life-long transformative tool for professional development.

• Proceedings of the IEEK Conference
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• 2005.11a
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• pp.447-450
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• 2005

Multi-channel artificial reverberation algorithm to control perceived direction and distance is described in this paper. In conventional algorithms using IIR filters, reverberation time is the only parameter to be controlled. Moreover, since the convolution-based conventional algorithms apply only same impulse responses, but not considering sound localization, it was not realistic enough. The new algorithm proposed in this paper utilizes early reflections segmented according to the azimuth from which direct sound comes and controls perceived direction by panning the direct sound, and controls perceived distance by adjusting Energy Decay Curve (EDC) of reverberation and gain of the direct sound. In addition, the algorithm enhances Listener Envelopment(LEV) to make late reverberation incoherent among channels.

• Journal of the Korean Society of Clothing and Textiles
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• v.21 no.1
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• pp.217-227
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• 1997

Costume of each age reflects its own history. Military costume is an reflections of war, social and geometrical background. Soldiers on their uniforms were at the battlefields with their lives and country on their shoulders. The main purpose of this writing is to study military costume of ancient empires in historical Point of view including especially those of Egypt, Mesopotamia, Crete, Greece, Etruria, Rome. As we will see, ancient military costume developed from earlier stages of uniforms into military costume in various ways. The types of military costume formed itself gradually but rapidly into sophisticated, useful, and excellent quality clothes. Military costume of early ancient empires signified its strength and were actual and symbolic costume that determined life and death, glory and disgrace.

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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• 2005.05a
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• pp.625-628
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• 2005

Silencers are extensively used for reducing noise in an exhaust system of internal combustion Engine and fluid machineries. The prediction and measurement of the transmission loss as the acoustic performance of silencers are important in early design stage. In the measurement of transmission loss, the semi-anechoic terminations are general used for reducing unwanted effects by reflecting wave. However it is very hard to remove reflecting wave perfectly. So the research about the error made by reflecting wave is important. The analysis about errors made by reflections and modification techniques are proposed. For an application example, the diesel particulate filter (DPF) is chosen. The transmission loss of DPF is measured with and without considerations of reflecting wave.

• 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.

• Journal of architectural history
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• v.27 no.4
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• pp.7-16
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• 2018

This study is focusing on anchogongs(按草工) in yeonggeonuigwes(營建儀軌), which were recorded with few details and in unsettled transcriptions. First, the positions and functions of anchogongs in $18^{th}$ censtury are analyzed by comparing to anchogongs in more detailed early $19^{th}$ century yeonggeonuigwes and those in extant buildings. Second, with the result, the historical significances are presumed in changing transcriptions of anchogong terms in those uigwes. In $18^{th}$ century uigwes, most of anchogongs are functioned as matbo-anchogongs and only four anchogongs in a gate building were used as jongryang-anchogongs. It is mainly because the sorts of buildings in $18^{th}$ century yeonggeonuigwes had only several varieties: most of the buildings belonging royal shrines. Transcriptions of anchogong terms had been changed for reflecting functional developments of anchogongs in $18^{th}$ century. However, reflections were much later than changes of actual functions.

• Proceedings of the IEEK Conference
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• 2008.06a
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• pp.919-920
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• 2008

In this paper, we present early processing techniques for visual inspection of metallic parts. Since metallic surfaces give rise to specular reflections, it is difficult to extract object boundaries using elementary segmentation techniques such as edge detection or binary thresholding. In this paper, we present two techniques for finding object boundaries on micro bit images. First, we explain a technique for detecting blade boundaries using a directional correlation mask. Second, a line and angle extraction technique based on Harris corner detector and Hough transform is described. These techniques have been effective for detecting blade boundaries, and a number of experimental results are presented using real images.

• Journal of the Korean Institute of Navigation
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• v.22 no.3
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• pp.27-34
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• 1998

The paper is the second part on the 3-D sound-field creation implementing the Virtual Reality Ship Handling Simyulator(VRSHS). As mentioned in the previous part Ⅰ, the spatial impression, which arose from reproduced 3-D sound-field , give natural sound environmental context to a listener. This spatial impression is due to the reverberation by reflections and ,is can be obtain by using Head-Related Transfer Function(HRTF). In this work, we foumulate early and late reverberation models of the HRTF's with theoretical control factors based on the sound-energy distribution in an irregularly shaped enclosures. Using the reverberation models, we report results from psychophysical tests used to asses the validity of the proposed 3-D soud-field control method.

• Journal of Christian Education in Korea
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• v.61
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• pp.165-201
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• 2020

The purpose of this study is to explore the development of language education of Christian early childhood education by exploring the change of pre-Christian preschool teachers through the development of biblical language education activities. Interviews, surveys, action plans, and reflections of 19 Christian education students who participated in the development of bible-based language education activities for children based on the language of early childhood language, were conducted from September 3 to December 28, 2018. The data were collected through a portfolio. By analyzing the collected data, the key categories were derived and categorized. For the objectification of data analysis and interpretation, two thematic and early childhood education specialists were identified. As a result, the preparatory Christian teacher experience for the development of bible-based langage education activities for young children was categorized into cognitive change, personality change and practical change. First, through the development of bible-based early childhood language education activities, Christian pre-service early childhood teachers have brought cognitive changes as 'processes not outcomes', 'integration not separation', 'living non-curriculum' and 'meaning not effect'. In developing bible-based language education activities for young children, Christian pre-service early childhood teachers experienced a cognitive change in the 'process of language education activities' rather than the developmental achievements and results of early childhood language education. Christian pre-service early childhood teachers recognized the necessity of 'integration of listening-speaking-reading-writing', not the separation of early childhood language education. They recognized the importance of 'informal language education in kindergarten life', as well as teacher-centered formal language education. In addition, they have made a cognitive change that 'child-centered meaningful language education experience' is more important than the effectiveness of early childhood language education. Second, in developing bible-based language education activities for young children, Christian pre-service early childhood teachers showed personality changes as 'confident teachers', 'professional teachers', and 'teachers with reflective thoughts and attitudes'. Finally, in developing bible-based language education activities for young children, Christian pre-service early childhood teachers recognized the power of positive language and practiced it to form habits of using the right language and to link Christian education with early childhood education. Through the development of bible-based language education activities for young children, Christian pre-service early childhood teachers are equipped with the heart attitude and enthusiasm required to become true early childhood teachers for young children in unpredictable educational conditions and rapidly changing educational realities. Teacher efficacy has improved. In the future, it is expected that various teacher education programs linking Christian education and early childhood education will be continuously and systematically implemented.

• Journal of the Korean Institute of Gas
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• v.4 no.1 s.9
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• pp.55-62
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• 2000

A surface acoustic wave method for the evaluation of small fatigue crack initiated from a pit-type surface flaw is presented. In-situ ultrasonic experiments are performed for aluminum 2024-T3 alloy samples under the fatigue test. During the fatigue test, the surface acoustic wave reflection signal from the pit and crack is measured under different hold-stress levels. From the measured and predicted surface wave reflections the depths of fully and partially open cracks are determined and results are verified by comparing with SEM fractography The crack opening behavior of the fatigue crack is evaluated from the predicted effective crack depths. The method developed in this study can be applied to monitor and characterize crack initiation and propagation from pit-type surface flaws in the early stage of fatigue life.