• (The)Study of the Eastern Classic
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• no.70
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• pp.185-210
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• 2018

This thesis investigates wrote by Lee Han Jin who edited "Chung Ku Young Un(靑丘永言)" with supposition that was affected by Lee Han Jin's literary activity and poetic direction, and Wayu(臥遊) was enjoyed by Sajok(士族) in the late Chosun Period. Lee Han Jin kept company with The Yeonam Faction and their friendship was based on Lee Han Jin's blood-relationship. Lee Han Jin's musical sense and poetic direction are verified by records about their poetic activity. In his old age, Lee Han Jin retired in the Yeongpyeong of Gyeonggido and edited "Chung Ku Young Un", Lee Han Jin's poetic direction is also verified by Sijo's theme which was included in "Chung Ku Young Un" and Lee Han Jin's Sijo. Meanwhile, Kyunghwasajok(京華士族) in the late Chosun Period wanted to overcome their situation that they could not leave city by imagination about landscape. That activity was Wayu. They didn't consider whether they see landscape, and they made good use of many genre of literature for effective Wayu. Lee Han Jin and his group's literary activity was formed by that cultural air. Lee Han Jin wrote though his retirement in mountain. It was also for effective imagination about landscape that he didn't see. So unworldly landscape was appeared in compared to other fishermen motif poems. The tension between Situation that he couldn't see real landscape and desire for effective Wayu get solved by form named that have distinct characteristic as a Jipgusi(集句詩).

• Journal of the Korean Institute of Traditional Landscape Architecture
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• v.29 no.2
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• pp.39-51
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• 2011

This study is explored the relationship of cultural history between the culture of mental stroll about nature and the traditional landscape architecture spaces, which showed various aspects of developments, based on the records as to landscape architecture spaces. The philosophical view on nature was turned into the esthetic view with the mellow ripeness of multifarious cultures in Choseon period, since the life of literati had to be a comprise between the Confucius' life and the Taoist life. Around the seventeenth century, as the culture of enjoying a secluded life in city had been descended, the aspiration to appreciate nature in daily life with the changed view on nature. Those desires made the Wa-yu culture, which has a meaning of mental stroll about nature, and drew the attention and various kinds of the Wa-yu culture had bloomed. In the field of Korean literature, the record of strolling in nature had flourished, while the realistic landscape painting had emerged in the field of art. In the field of landscape architecture, the building of places where the vivid experience of nature was realized in the aspect of impressions was performed to express their utopia. Indeed, the space of traditional landscape architecture in the reality meant more than the actual nature.

• 한국항공운항학회:학술대회논문집
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• 2006.11a
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• pp.91-94
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• 2006

• Proceedings of the Korean Society of Coastal and Ocean Engineers Conference
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• 1993.07a
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• pp.55-58
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• 1993

유공식 방파제는 기존 직립 혼성방파제의 케이슨 전면에 유공벽과 유수실을 설치함으로써 교량이 유공벽을 통과하여 유수실내로 진입할 때 와유 등에 의해 접근 파랑에너지를 감소시킬 수 있도록 고안된 구조형식을 갖는다. 따라서, 방파제 주변의 항로유지에 있어서 기존 직립 혼성방파제에 비해 우수한 특성을 지닌 형태이다. 이러한 방파제 형태는 일본에서는 다수 시공되어 성공적으로 운영되고 있으나 국내에서는 아직도 이렇다 할 시공실적이 없다. (중략)

• Proceedings of the KSME Conference
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• 2003.04a
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• pp.2109-2114
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• 2003

The vortex flow characteristics of a yawed LEX-delta wing at a high-angle of attack are studied using a computational analysis. The objective of the present study is to investigate and visualize the effects of the yaw angle, the development and interaction of vortices, the relationship between the suction pressure distributions and the vortex flow characteristics. Computations are applied to the three dimensional, compressible, Navier-Stokes Equations. In computations, the yaw angle is varied between 0 and 20 degree at a high-angle of attack. Computational predictions are compared with the previous experimental results.

• Proceedings of the Korea Contents Association Conference
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• 2014.11a
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• pp.117-118
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• 2014

본 연구에서는 조선시대 정원 관련 문헌의 분석을 통해 정원문화에서 나타나는 전환기적 양상을 살펴보고자 진행되었다. 자료의 분석결과 산수에 의탁하는 귀거래의 희구는 한양으로의 문물 집중현상으로 도시 속의 전원을 선호하는 양상을 보이고 있었다. 또한 정원문화로써 이전시기 완물상지로 여겨지던 화목이나 화훼에 대한 애호와 석가산의 조성이나 산수화를 통한 고동서화의 취미로써 산수애호사상과 함께 자신이 선호하는 요소를 가까이 두고 즐기고자 했던 와유문화의 완성기로 대별되었다. 이는 조선후기의 정원문화가 자연관의 변화나 기존의 문화가 완성되는 형태로 이전시기와는 다른 양상을 보이고 있음을 알 수 있다.

• Aerospace Engineering and Technology
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• v.2 no.2
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• pp.142-150
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• 2003

Turbulent flows and related heat transfer in a square heated duct is investigated by a turbulence model and a large eddy simulation. The cooling channel of calorimeter is modeled to the square duct. The nonlinear k-ε-fμ model of Park et al. [3] is slightly modified and their explicit heat flux model is employed. The Reynolds number is varied in the range 4000≤Reｂ≤20000. The heat transfer is closely linked to the secondary flows which driven by the turbulent motion. Its magnitude is 1~3% of the mean streamwise velocity. The relation of Nu~Re0.8Pr0.34 is validated by comparing with the predicted Nu of k-ε-fμ model. Finally, the coherent structures and thermal fluctuations are scrutinized.

• Journal of the Korean Institute of Traditional Landscape Architecture
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• v.31 no.1
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• pp.1-12
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• 2013

Korea's traditional Sokgasans(a artificial rock mountain) are elements of our excellent rock garden culture that have been inherited from Goryeo Era to Chosun Era. This study is to analyze how the culture of Sokgasans in the Goryeo and the Chosun Eras has been has been representated the implications and inherited in terms of historical aspects. Korea's traditional Sokgasans, which were created in the Goryeo Era by imitating the landscape of mountain ranges, created a small artificial mountain made of oddly shaped stones, imitating a real mountain. People in those days would reproduce mountain landscapes through a miniaturization technique, enjoying the pleasure of deep mountains and valleys as they lay on their gardens at home while having an aesthetic experience of the landscape that supported their emotional stability and healing. The inner side of these Sokgasan was intended to represent the world of the Taoist hermit with miraculous powers in terms of utopia, expressing 5 Ak mountains(Song Shan, Taishan, Huashan, Heng Shan and Hyeong Shan) where the mountain of 3 Gods(Youngju, Bongrae and Bangjang) wishing for 'No aging and living long' and idea of the Taoist hermit with miraculous powers are concentrated beyond the beauty of form in the landscape itself. In addition, people could refine their minds by practicing the Confucianist lesson of loving the mountain and water by watching the Sokgasan and imitating 'Famous mountains and lakes" from China and they had been changed and advanced embracing various implications in inner side of Sokgasans. Korea's traditional Sokgasans not only made it possible for people to experience aesthetic landscapes as a practical element of the scenery but also had deep symbolic implications that go beyond their formal beauty and were sublimated as an ideational space of unlimited imagination.

• Journal of the Korean Society for Aeronautical & Space Sciences
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• v.32 no.8
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• pp.20-28
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• 2004

For the prediction on the onset of oblique shock wave-induced vortex breakdown, computational studies on the Oblique Shock wave/Vortex Interaction (OSVI) are conducted and compared with both experimental results and analytic mode1. A Shock-stable numerical scheme, the Roe scheme with Mach number-based function (RoeM), and a two-equation eddy viscosity-transport approach arc used for three-dimensional turbulent flow computations. The computational configuration is identical to available experiment, and we attempt to ascertain the effect of parameters such as a vortex strength, streamwise velocity deficit, and shock strength at a freestream Mach number of 2.49. Numerical simulations using the k-w SST turbulence model and suitably modeled vortex profiles are able to accurately reproduce many fine features through a direct comparison with experimental observations. The present computational approach to determine the criterion on the onset of oblique shock wave-induced vortex breakdown is found to be in good agreement with both the experimental result and the analytic prediction.

• Journal of the Korean Society for Aeronautical & Space Sciences
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• v.30 no.5
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• pp.109-117
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• 2002

An off-surface flow visualization experiments have been performed to investigate the flow field over a delta wing with the leading edge extension(LEX). The model is a flat wing with $65^{\circ}$ sweepback angle. The free stream velocity is 6.2 m/s, which corresponds to Reynolds number of $4.4\times10^5$ based on the wing root chord. The angle of attack and sideslip angle range from $16^{\circ}\sim28^{\circ}$ and $0^{\circ}\sim-15^{\circ}$, respectively. The visualization technique of using the micro water-droplet and the laser beam sheet enabled to observe the vortical flow structures, which can not be obtained by 5-hole probe measurements. With sideslip angle, the interaction and breakdown of the LEX and wing vortices was promoted in the windward side, whereas, it was suppressed in the leeward side.