• Electric Engineers Magazine
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• v.242 no.10
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• pp.45-49
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• 2002

일반적으로 뇌전압 또는 뇌전류의 파형은 그림에서 나타난 바와 같이 충격파를 써지라고 부르기도 하는데 이것은 극히 짧은 시간에 파고값에 달하고 또 극히 짧은 시간에 소멸하는 파형을 갖는 것이다.

• Cross-Cultural Studies
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• v.44
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• pp.239-281
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• 2016

This article explores the fate of futurism not only by tracing the entire process from the birth and decline of Russian futurism in the early 20th century and the so-called "Korean futurism" in the early 21st century, but also by delving into how their characteristics were shaped. In the first chapter, we investigate four groups of Russian futurism - Ego-Futurism, Cubo-Futurism, Tsentrifuga, and the Mezzanine of poetry, which were born in the age of utopianism before the Revolution. In the opera Victory Over the Sun, which was the culmination of the Zaum project of Cubo-futurists, we can find the initial shortcomings at the levels of language (Kruchenykh), music (Matyushin) and decoration and costume design (Malevich). In the second chapter, we examine chronologically how the term 'futurism' appeared in Korean literature history. In Korea, the term 'futurism' was born following the naming and classification of critic Kwon Heok-Woong, not by the voluntary manifestation of experimental poets such as Hwang Byong-Seung, thus this specific situation provoked stormy polemics between critics for futurism and critics against futurism in the Korean literary world. These polemics on futurist poetics have led to considerations of the relation of criticism to poetry.

• Journal of the Korean Society for Marine Environment & Energy
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• v.2 no.1
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• pp.40-48
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• 1999

Wave absorbing system is needed at various kinds of wave basins (wave flume, towing tank, square tank) for the model test related to the ocean engineering. In this paper, the performance of wave absorbing system with new concept is estimated throughout the experiments. Herein, the wave absorbing system is designed by punching plate with a given porosity which is installed horizontally and submerged near the water surface. As the incident wave generated by a wave maker advances above a punching plate, the strong jet flow is formed near a hole of punching plate. As a result, wave energy is dissipated into heat energy, Systematic model tests were conducted at KRISO to verify the performance of the wave absorber using a punching plate. It was found that the reflection coefficient of wave absorber is deeply dependent on both the porosity and the submerged depth of a punching plate. Inclined installation of a punching plate shows better performance than a horizontal one within a certain inclined angle.

• Transactions of the Korean Society of Mechanical Engineers A
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• v.31 no.3 s.258
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• pp.380-387
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• 2007

We carried out an image analysis of living cells forming their contacts at the bottom of the cell culturing substrate. In order to visualize the contact area selectively, we adopted total-internal-reflection-fluorescence (TIRF) method, which can illuminate the specimen volume within only several hundred nano-meters above the substrate. From the fluorescent intensity of the TRF image, we could calculate the distance of the cell surface from the substrate. As a result, we visualized the origin of cell contacts, their movements, and the change of cell-contact type from the close-contact into focal-contact with information of its vertical displacement representing the temporal evolution process of the three-dimensional cell-surface-profile near the contact area during this metamorphosis.

• Journal of Korea Water Resources Association
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• v.46 no.3
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• pp.245-252
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• 2013

The reflection coefficients of monochromatic water waves over various shear currents flowing on a constant topography are estimated analytically in this study. The region of varying shear currents is represented by a finite number of tiny steps with a uniform depth topography. The proper numbers of steps and evanescent modes needed for the analysis are proposed by a series of convergence tests. The characteristics of reflection coefficients for various shear currents conditions are also examined.

• Journal of the Korean Magnetics Society
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• v.15 no.2
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• pp.72-75
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• 2005

The profiles of the second-order higher harmonics during B-H hysteresis loop have been measured as functions of the tensile stress in grain-oriented $3.2{\%}$ Si steels. The observed harmonics profiles have been analyzed in terms of the nonlinear, asymmetric magnetization which reflects the domain reorientation under the field. The field interval of the second-order higher harmonics is related to the nucleation and annihilation fields and a measurement method for the magnetostriction is proposed using the harmonics profiles under tensile stress.

• Journal of the korean academy of Pediatric Dentistry
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• v.34 no.1
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• pp.156-161
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• 2007

Pediatric dentists are frequently encountered with fractured root fragments of primary teeth caused either by the traumatic injuries or by the accidental fractures during the procedure of tooth extractions. In these situations, we often hesitate which method to choose, extract or retain it. In general, it is recommended to retain apical fragments, as the attempts to extract the apical fragments might harm the developing permanent tooth germ. This study was designed to ensure the validity of intentional retention of the root fragments of primary teeth in the situations described above. 6 children with intentionally root fragments who experienced root fracture in primary anterior teeth were available Periodic radiographic assessment was performed at 3 months interval for $7{\sim}37$ months. The results of this study showed that apical fragments had been resorbed through physiologic process in 5 patients. Apical fragment had been gingival emergence along with the erupting permanent tooth in 1 patient. There were no evidence of interference with eruption of permanent successors. In summary we have been ensured the validity of intentionally retention of the root fragments of primary teeth. Children with being remained apical root fragment should be recalled regularly for assessment and parents should be thoroughly informed about the situation with special emphasis on the necessity of periodic check-up.

• Proceedings of the Optical Society of Korea Conference
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• 1991.06a
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• pp.109-109
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• 1991

자기변형 효과가 큰 Metallic glass 2605SC에 20cm의 광섬유를 붙여서 교류 자기장 측정을 위한 Mach-Zehnder형 광섬유 간섭계를 구성하였다. 능동 위상 추적 방법을 사용하여 간섭계의 위상차를 최대 측정감도를 갖는 $\pi$/2로 고정시킴으로써 온도 및 진동등의 영향에 의한 신호소멸 현상을 해결하였다. 0.2~2.0 KHz에서 주파수특성, dc bias의 영향 그리고 교류 자기장과 간섭계 출력 사이의 선형성을 조사하였다.

• Proceedings of the Korean Society of Coastal and Ocean Engineers Conference
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• 2003.08a
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• pp.87-97
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• 2003

외해로부터 내습하는 파랑을 차단하므로서 해안의 세굴, 침식 등을 방지하고 항내의 정온을 유지하고 항만시설물을 보호하기 위하여 축조되는 방파제, 호안 등의 구조물 형식에는 경사제, 직립제, 혼성제 등 여러 가지가 있다 이 중 경사제는 표면을 파력에 충분히 대항할 수 있는 크기의 사석이나 콘크리트 블록을 쌓아 파랑을 경사면에서 쇄파시켜 에너지를 소멸시킴으로서 소파기능을 발휘한다. (중략)

• Proceedings of the Korean Society of Coastal and Ocean Engineers Conference
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• 2003.08a
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• pp.276-282
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• 2003

The breakwater of surface-piercing type has been developed mainly for application within bays or estuaries that are semi-protected from the direct impact of targe waves. Most of bays have soft foundation which is too weak to bear the weight of gravity type breakwater. (omitted)