• Proceedings of the Korean Society of Computer Information Conference
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• 한국컴퓨터정보학회 2008년도 제38차 하계학술발표논문집 16권1호
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• pp.231-235
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• 2008

컴퓨터 및 주변기기의 성능이 발전함에 따라 영상처리에 대한 관심이 높아지고, 영상으로부터 원하는 정보를 얻기 위한 연구가 활발히 진행되고 있다. 이러한 연구에서 움직임 추적, 특정 사물 추출, 동영상 검색 등으로 정보를 추출하는 과정은 높은 시스템 자원을 요구하기 때문에 멀티태스킹이 어렵다. 따라서 본 논문에서는 시스템 자원의 사용을 최소화하는 제스쳐 인식시스템을 설계하고 구현한다. 이 시스템은 동적테이블 마스킹을 이용하여 노이즈를 제거하고, 가이드라인 인식 방법을 적용하여 손동작 제스쳐를 인식한다, 또한 안면 비율 분할 방법과 음영 측정 방법을 이용하여 눈과 입술의 제스쳐를 인식한다.

• Proceedings of the KIEE Conference
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• 대한전기학회 1997년도 하계학술대회 논문집 A
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• pp.115-117
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• 1997

본 논문에서는 유도전동기의 적응 비선형 제어에 대해 논한다. 제어 목적은 회전자저항의 불확실성에도 불구하고 유도전동기의 속도 및 자속을 분리하여 제어하는 것이며, 이를 위해 백스테핑(Backstepping) 기법을 사용한 비선형제어기와 회전자 저항 추정기를 결합한다. 제안된 적응제어시스템은 내부의 모든 변수가 유계(Bounded)되어 있다는 점에서 안정하며, 더불어 그 개선된 성능을 모의실험을 통해 보인다.

• Korean Journal of Air-Conditioning and Refrigeration Engineering
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• 제23권3호
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• pp.201-207
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• 2011

Total heat recovery type ventilators that are connected to each room with ducts are mainly installed in Korea, but they raise concern over duct pollution. In this study, indoor environments made by thin line type ventilators installed in dwelling units of apartment houses are investigated by CFD. Results show the case that thin line type ventilators installed in each room-including kitchens-make the best indoor environment that maintains air velocity at under 0.25m/s, and evenly distributes the age of air in all areas.

• Korean Journal of Air-Conditioning and Refrigeration Engineering
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• 제21권12호
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• pp.688-694
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• 2009

With the increase in the demand for sustainable and environmentally-friendly development, Green Building Certification System came into force in 2002, Evaluation parts of Green Building Certification System are divided into land use and transportation, energy, ecological environment, and indoor environment. Alloted point for the part of energy is larger than other part, thus we can say that this part is very important to increase the green building performance. This study aims to analyze the present condition of design and construction for the part of energy in the certificated green school building. Total 40 certificated school buildings were selected and average scoring rate of each item was evaluated. Key particular to be considered were suggested to improve the item of energy consumption.

• Korean Journal of Air-Conditioning and Refrigeration Engineering
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• 제22권11호
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• pp.812-819
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• 2010

Recently residential buildings are characterized with high-rise and high density. Under this circumstance, achieving comfortable and healthy indoor environment with minimized energy consumption becomes a very challenging engineering and societal issue. Along this the increased size and transparency of window as well as light surface caused by high stories lowers the heat shield efficiency of building. Since glass that constitutes building surface has low heat efficiency, it aggravates heat loss of all building considerably, thereby resulting in extreme heating load and cooling load in the country where temperature varies much in summer and winter. The research will check whether experiment can be effectively done by overcoming the limit of existing artificial solar laboratory constructed in the country and properly adjusting controlled variables with simplified function through construction of this experimental set.

• Elastomers and Composites
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• 제4권1호
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• pp.83-88
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• 1969

As a part of a series of previous studies, physical properties of various portions of a tire made of NR-Syn. R bloods were studied. 1. It was found, in general, most effective for tire tread when 50 parts of HAF black was blended with NR and Syn. R with a ratio of 70/30. 2. It was found that the use of SBR 1712 has an advantage in price, easy processing and physical properties than other synthetic rubber. 3. A technical compounding of various portions of a tire has to be determined for optimum cure conditions.

• The KSFM Journal of Fluid Machinery
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• 제9권1호
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• pp.19-24
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• 2006

Experiments are carried out to investigate the effect of radial tip clearance on a turbopump inducer, which has two blades with inlet tip blade angle of 7.8 degree and tip solidity of 2.7. Hydraulic and cavitation tests are performed for three cases of tip clearance ratio, that is, 0.026, 0.053, and 0.079. With increase in the tip clearance, inducer head and pressure on the inducer tip decrease. Attached cavitation and cavitation surge are observed in the cavitation tests. In the attached cavitation one cell rotates at the same rotational speed as that of the inducer. Cavitation performance deteriorates with increase in the tip clearance. The level of casing vibration increases in the cavitation condition and the level is very high when the attached cavitation appears.

• Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
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• 한국조명전기설비학회 2008년도 추계학술대회 논문집
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• pp.257-259
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• 2008

현재 산업사회의 발달과 더불어 신뢰성 높은 양질의 전기에너지와 운전 및 보수의 간편화, 계통운용의 신뢰성의 확보가 요구되고 있다. 또한 $SF_6$을 대체할 친환경적인 절연매체의 개발이 절실히 요구되고 있다. 이에 본 연구는 모의 GIS내 친환경적인 절연재료인 질소($N_2$)와 건조공기(Dry-Air)의 기본적인 절연특성을 구명함하였다. 또한 본 실험의 조건내에서 절연설계식을 도출하여 각종 전력응용 설비의 절연매체로 사용가능 시 기초자료로 사용 가능할 것으로 사려된다.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 한국정보통신학회 2013년도 추계학술대회
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• pp.261-262
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• 2013

In this paper, we subject to MA area to identifying improve the performance of equipment and prices down. When we replace the equipment, the cost savings available area, servers, storage, the As-is vs To-be of software compared to the cost. Thus, based decision-making is utilized.

• KIEAE Journal
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• 제9권5호
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• pp.63-68
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• 2009

As with the disappearance of a living room window due to the trend in apartment housing construction that prefers a larger, expanded living room, the sound insulation performance of the balcony window is becoming an important factor to determine the level of indoor noise at an apartment unit. Considering that the indoor noise inside an apartment unit is mandated by law at or below 45dB(A), the balcony window is increasingly assuming an even more important role. Sound insulation performance of the window was measured by examining differences in data involving varying angles of incidence of the sound source as obtained from the same balcony window. Also, acoustic intensity measuring was performed at and around the window to determine its sound insulation quality. Results of measuring on the sound source's angles of incidence indicated that the performance showed some differences in lower frequency ranges, though with no significance. Intensity measuring results showed that the sound insulation performance was reduced near the connection part of the window and the window frame.