• (The) Research of the performance art and culture
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• no.40
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• pp.137-161
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• 2020

In this article, I examined the conflict of youth reflected in Bae Bong Ki's plays based on theory of 'conflict'. Bae Bong Ki has been questioning the 'youth rights' in determining the content of performances, along with 'the magnetic field of college entrance examination' where most of the youth feel under huge pressure in his play. In the and , I focused on the students with the highest grade and the students with the lowest grade in the context of university entrance examination. Students who are struggling to keep the grades up are captured in this play as the educational reality of adolescents in distress. The situation of the top and bottom students is different, but both top and bottom students were too stressful to go to school. And 'the rights of the youth in deciding the content of the performance' in was a difficult topic because it collides with the right for the teacher to educate. It is expected that many plays will be created reflecting the conflict of youth in the future, and youth theater as well as discussions upon it will be enriched.

• Proceedings of the KAIS Fall Conference
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• 2009.12a
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• pp.511-514
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• 2009

현재 일반적으로 사용되는 300cc 소형엔진 기화기의 최적화 및 성능 향상을 위하여 유동해석을 수행하였다. 베르누이의 정리를 기본으로, 성능을 발휘하는 주요 설계인자인 기화기 내부의 벤튜리 튜브의 각도, 길이 등을 변수로 하여 유동해석을 수행하였다. 그 결과를 분석하여 최적화된 모델을 제시하였다. 결론적으로, 유동 해석을 바탕으로 기존 사양 대비 향상된 성능의 모델을 제시하였다. 유동해석을 통해 기화기 내부의 벤튜리관에 곡면(Rounding)처리를 적용함으로 기화기에서 소모되는 흡기저항을 줄여 펌핑로스를 저감활수 있음을 확인하였다. 펌핑로스의 저감은 엔진 연비의 향상과 엔진토크에 긍정적 효과로 작용할 것으로 기대된다. 벤튜리관의 출구 각도를 감소시킴으로 박리를 개선하여 Dead Volume을 줄임으로서 기존 모델에 대비하여 원활해진 유동의 흐름을 얻을 수 있었다. 이는 흡기유량을 증대시키고 엔진출력을 상승시키는 효과로 작용할 것으로 예상된다.

• Proceedings of the Korean Information Science Society Conference
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• 2005.07b
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• pp.73-75
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• 2005

지금까지 제안된 구조조인 알고리즘들은 하나의 XML 문서에 대해 복잡한 질의를 빠르게 처리할 수 있다는 장점이 있다. 하지만, 다중 문서를 처리할 때 각 문서에 부여된 문서식별자에 의해 문서별 질의 처리를 하기 때문에, 문서의 수가 증가한다면 질의 처리 시간도 길어진다는 문제점이 발생한다. 이 논문에서는 이 문제를 해결하기 위해 XML 문서를 XMAS 트리로 병합한 뒤 전역적으로 인코딩을 하는 기법을 제안한다. XMAS 트리는 각 문서의 구조 정보를 유지한 채 공통된 부분을 공유하는 트리이다. 이 공유에 의해서 질의 처리시에 성능 향상을 얻을 수 있다. 실험 결과, 선형 질의에 대해 수백 배, 가지모양 질의에 대해 수십 배 빠르게 질의를 처리할 수 있었다.

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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• 2003.05a
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• pp.1079-1084
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• 2003

A liquid storage rectangular tank structures are used in many fields of civil, mechanical and marine engineering. Especially, Ship structures have many tanks in contact with inner or outer fluid, like ballast, fuel and cargo tanks. Fatigue damages are sometimes observed in these tanks which seem to be caused by resonance with exciting force of engine and propeller. Vibration characteristics of these thin walled tanks ill contact with fluid near engine or propeller are strongly affected by added mass of containing fluid. Therefore it is essentially important to estimate the added mass effect to predict vibration of the tank structures. In the previous report, we have developed numerical tool of vibration analysis of 3-dimensional tank structure using finite elements for plates and boundary elements for fluid region. In the present report, using the numerical analysis, vibrations characteristics in deep water tank are investigated and discussed.

• FLOWER RESEARCH JOURNAL
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• v.18 no.4
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• pp.256-260
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• 2010

This study was carried out to investigate effects of stock plant management and foliar spray of GA on the flower quality in hydroponically grown chrysanthemum 'Shinma'. In the growth and development as affected by stock plant management, cut flower length, petal number and cut flower weight were the best in the plot of long day and chilling treatment showed 114 cm, 298 and 102 g, respectively. Chlorophyll content(SPAD-value) was the highest in the plot of foliar spray of diluted Molbia(1 : 500). Flower quality according to concentration and spray time of gibberellin showed a different pattern. Cut flower length was the longest in the plot of solution diluted to 1 : 1,000 spraying before flowering at 60 days, petal number was the most in 1 : 500 at 60 days, and cut flower weight was the heaviest in 1 : 2,000 at 60 days, respectively. However, peduncle length was tended to be elongated with foliar spray of gibberellin solution diluted to 1 : 500 or 1 : 1,000 before flowering at 45 days.

• Korean Journal of Food Science and Technology
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• v.26 no.1
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• pp.98-101
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• 1994

The amount of added water for rice cooking was determined by extrusion test and sensory evaluation of cooked rice. The extrusion force was positively correlated with hardness and negatively correlated with moisture content and wetness of cooked rice. The extrusion force and moisture content of cooked rice were 57.9 kg and 62.3% respectively at the 'medium' wetness (neither too hard and dry nor too soft and watery) of cooked rice. The optimum water to rice ratio for the cooked rice haying 'medium' wetness was 1.46.

• Annual Conference of KIPS
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• 2016.10a
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• pp.86-89
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• 2016

실내 위치 인식 기술은 Wi-Fi, Bluetooth Low Energy 등 여러 기술을 통해 시도되어 왔으며, 실내 위치 인식 시스템의 상용화가 급증하는 추세이다. 대표적인 실내 측위 시스템인 Wi-Fi 기반 실내 측위는 고출력으로 넓은 범위에 서비스를 제공해주지만, 각 AP 마다 파워 출력이 다르기 때문에 위치 인식 측면에서의 오차가 발생하고, Bluetooth Low Energy 기반 실내 측위는 10m Cell 내에서는 정확한 인식이 가능하지반, 10m 거리 밖 오차는 매우 크다. UWB(Ultra Wide Band)[1][2][3]는 저전력으로, 3.1~10.6GHz의 대역올 이용하여, Wi-Fi의 10배 이상의 속도로 데이터를 전달한다. 이때, 데이터 전달에 사용되는 전파신호는 레이더 신호와 유사한 특징을 가져 거리측정에 사용될 수 있으며, 실내 측위 시 15cm 이내의 정확도를 가진다. 본 논문에서는 UWB의 광대역을 이용한 핑거프린팅과 정밀 측위를 위한 TDoA 기법을 이용한 정밀 실내 측위 알고리즘을 제안한다.

• Journal of the Korean Society of Fisheries and Ocean Technology
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• v.19 no.2
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• pp.117-124
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• 1983

In rough seas, actual behaviours of a ship may not be estimated by the linear strip theory, because of Nonlinearities due to the hull shape, bottom slamming and bottom and/or bow-flare slamming. In case of slamming, impulsive hydrodynamic pressure occurs on the fore body surface of the ship, resulting hull vibration called whipping, by which the ship may suffer from serious structural damages and the impact pressure, depends critically on the relative velocity at re-entry. In this paper, the Time history of impact froce at each station, the longitudinal distribution of impact force at critical time, the Time history of acceleration at F.P. and the Time history of Bending moment at midship are illustrated. That is, authors analyzed Dynamic response of container ship to be subjected slamming impact force.

• Proceedings of the Korean Institute Of Construction Engineering and Management
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• autumn
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• pp.369-372
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• 2001

The processes for verification of performance records in construction have many problems according to construction firm's participating in some of the processes. This study analyzed about current processes and provided improved processes with IDEF method. As the result of this study, it was found that 'As-Is' model has many repetition of activities and 'To-Be' model has three times more effective than 'As-Is' model has. The data modeling which is available for 'To-Be' model was also suggested.

• Bulletin of the Society of Naval Architects of Korea
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• v.24 no.1
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• pp.51-66
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• 1987

In this paper, the authors investigate theoretically the motion and longitudinal strength of ships among waves talking account of the effects of nonlinearities such as the hull shape, bottom emergence, and hydrodynamic impact. Incidentally the ship is treated as an elastic beam in heading wave condition regarding characteristics of slamming and whipping-according to the variation in the range of a quarter length of the ship forward and the increase of the elastic modes up to 4-th vibration mode were investigated by the present theory. Calculations are performed for 97m container ship and its validity is confirmed by a series of model tests. Conclusions obtained are as follows; 1) Acceleration and pressure estimated by the present theory are in good accordance with experiments. 2) The present non-linear theory may be applied for estimating longitudinal bending moment of ships in slamming and whipping conditions. 3) In investigation of the characteristic in response according to shape variation for parts under draft and vow-flare in the range of a quarter length of the ship forward, dynamic responses due to the former were much more conspicuous than those due to the later. 4) In the maximum bending moment, the considering case up to 2-the mode are larger, about $10{\sim}15%$, than that up to 4-th mode.