• Korean Architects
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• s.553
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• pp.68-76
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• 2015

흔히 예술은 사회적 생산물이라고 말한다. 표층에 들어난 현상의 배후에 그 어떤 것이 존재한다는 것이다. 파도 깊은 곳에 격랑을 일으키는 거대한 물줄기가 있듯이 문화예술의 현상 속에는 시대적 상황과 사회문화적 배경이 존재한다. 하나의 건축물에도 시대적 배경과 담론이 존재하고, 건축사의 과업 속에는 치열한 몸부림이 동반된다. 건축 속에 담긴 심층적 의미를 찾아 떠나는 본 연재는 불후의 건축이 탄생되는 바로 그 순간 그 현장을 탐침하게 된다. 현상의 해석을 위해 때로는 건축주를 찾아 나설 것이며, 때로는 경계를 넘어 미술과 음악같은 인접예술 분야의 현상도 끼어들 것이다. 세잔의 다시점 회화처럼 건축을 다양한 시각에서 바라볼 것이다. 우리 사회에서 건축에 대한 문화적 인식이 높아졌다고는 하나 경직된 틀에서 벗어나지 못하고 있다. 물리적 실체가 아닌 문화적 텍스트로 건축을 이해하는데 본 연재가 도움이 되길 바란다.

• Journal of the Korean Society of Marine Environment & Safety
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• v.23 no.6
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• pp.613-619
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• 2017

Recently, the size of container ships has been progressively increasing, and much attention is required for safe navigation in shallow areas such as coastal waters and ports due to increases in draft. It is necessary to understand the characteristics of ship motion not only in still waters but also with waves. Especially in shallow regions, squat due to the vertical movement of the ship can be an important evaluation factor for the safe navigation, and wave drift force acting in the horizontal direction can have a great influence on the maneuverability of a ship. In this study, a numerical simulation using computational fluid dynamics has been performed for the wave exciting force acting in the vertical direction and the wave drift force acting in the horizontal direction for a very large container vessel sailing in shallow zone. As a result, it was found that total resistance in still waters greatly increased in shallow water. Wave drift force was shown to decrease given longer wavelengths regardless of water depth. It was observed that the wave exciting force in shallow water was considerably larger than at other water depths. As wave height against the central part of the ship lowered, the aft side rose.

• The Journal of the Korea Contents Association
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• v.19 no.5
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• pp.644-657
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• 2019

This study examines the types of strategic alliances formed between terrestrial broadcasters and content start-ups, their resource inter-dependence and the dynamic evolution of their relationship through a case study of KBS Labs, a strategic alliance between KBS and content start-ups. Mergers, acquisitions and strategic alliances sought by large media companies or strategic alliances made only between disparate providers in broadcasting and telecommunications industries are now actively pursued by traditional media and start-ups. The alliances between traditional media and start-ups are beneficial to both parties: traditional media can quickly implement start-ups' innovative ideas and business models and start-ups can tap into not only vast amounts of content being created by or in the archives of traditional media but also their capital, office space and reputation. Therefore, the case study of KBS Labs will help draw out important implications for motivating strategic alliances between traditional media and start-ups. To this end, the resource-based view and the evolutionary theory of the firm are adopted to explore the characteristics and development process of the KBS Labs business.

• Journal of the Korean Society for Aeronautical & Space Sciences
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• v.35 no.2
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• pp.94-100
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• 2007

An axisymmetric supersonic jet screech in the Mach number range from 1.07 to 1.2 is numerically simulated. The axisymmetric mode is the dominant screech mode for an axisymmetric jet. The Reynolds-averaged Navier-Stokes equations in the conjunction with a modified Spalart-Allmaras turbulence model are employed. A high resolution finite volume essentially non-oscillatory(ENO) schemes are used along with nonreflecting characteristic boundary conditions that are crucial to screech tone computations to accurately capture the sound waves, shock-cell structures and large-scale instability waves.

• 한국지구물리탐사학회:학술대회논문집
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• 2005.05a
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• pp.209-214
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• 2005

In the present age, the quality of MT(magnetotellurics) data highly depends on the level of industrial interference in data. We analyzed the correlation between the spatial distributions of man-made EM noise source and the characteristics of MT data. The noise source analysis shows the correlation between the noise source density and the power spectral density of measured magnetic field in the frequency band of 60 Hz harmonics. In the MT 'dead band', the strong polarization observed on the magnetic field reveals that the severe artificial noises are caused by the adjacent metropolis.

• The Journal of Korean Institute of Electromagnetic Engineering and Science
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• v.27 no.5
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• pp.471-481
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• 2016

We introduce the design technique and test results of a millimeter-wave compact antenna test range. Physical optics is employed for the analysis of the plane wave collimated by an electrical large parabolic reflector of the compact range in the test zone. The performance of the manufactured compact range is verified with the field probing test on the quiet zone and the measurement of high gain antenna. A millimeter-wave compact range designed in the frequency range of 75~110 GHz with a diameter of the test zone of 50 cm shows the magnitude variation of less than 0.75 dB.

• Proceedings of the Korean Society of Propulsion Engineers Conference
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• 2007.04a
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• pp.329-334
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• 2007

An axisymmetric supersonic jet screech in the Mach number range from 1.07 to 1.2 is numerically simulated. The axisymmetric mode is the dominant screech mode for an axisymmetric jet. The Reynolds-averaged Navier-Stokes equations in the conjunction with modified Spalart-Allmaras turbulence model are employed. A high resolution finite volume essentially non-oscillatory(ENO) schemes are used along with nonreflecting characteristic boundary conditions that are crucial to screech tone computations to accurately capture the sound waves, shock-cell structures, unsteady shock motions and large-scale instability waves.

• Computational Structural Engineering
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• v.7 no.3
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• pp.123-131
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• 1994

This paper is concerned with a new concept of vibration control in which thermal stresses are utilized. Thermal actuators are used to generate thermal stresses in a vibrating beam. The thermal actuators are found to work successfully as the control means. Especially the proposed control method in this paper can be effectively applied to the large space structures with low natural frequencies rather than to the structures with high natural frequencies. In the process of control design, various control methods including optimal-robust control method are investigated. Through numerical simulations, it is found that the robust-optimal control method can be efficiently with the vibration control of a cantilever beam using thermal stresses.

• The Journal of Korean Institute of Electromagnetic Engineering and Science
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• v.24 no.3
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• pp.316-323
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• 2013

This paper deals with the near-field to far-field calculation for far-field characteristics of antenna and electromagnetic compatibility(EMC) testing. Since the conventional EMC testing process is inefficient such as measurements of the wide band signals and mega structures, Stratton-Chu formula is used to predict the far-field emission by simple and direct process. The usefulness of Stratton-Chu formula is verified by comparing to the analytic solution of the uniform distribution aperture in free-space. In order to inspect the far-fields and to get the near-field values, full-wave simulation solver is utilized. Through the full-wave simulation about the patch antenna, calculated far-field results from Stratton-Chu formula are proven. The predicted magnitudes of the far-field are in error by less than 6 %.

• The Journal of the Korea Contents Association
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• v.8 no.3
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• pp.75-85
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• 2008

Since the first interactive broadcasting of Skylife had been launched in S. Korean it has passed over 4 years. Subsequently the new digital broadcasting platforms, such as DMB, Mobile-TV, IPTV and so forth, are appearing between the keen rivalries. At the centre of diagram for new digital platforms there is positioned the interactivity. In order to cope with the limitation of contents on television, even Korean terrestrials have resolutely carried out interactive broadcasting as of 8th of June, 2006. Although the flamed competition of digital environment there are lacking in the public understanding and interests for interactive programmes on digital television. We can be analysed that it is difficult to acquire the viewer's satisfaction for guessability in spite of our governmental efforts. Here it presents the problematic results obtained by analysing both quantitative and qualitative data from the usability test for the current interactive programme in centre of the viewer.