• The Journal of the Acoustical Society of Korea
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• v.13 no.2
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• pp.5-12
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• 1994

This paper proposes One Stage MSVQ/DP method for word recognition system university administration branch names are selected for the recognition experiment and 10 LPC cepstrum coefficients is used as the feature parameter. Besides the speech recognition experiments by proposed method, for comparision with it, we perform the experiments on the same data by Level Building DTW and One Stage DP method. The Recognition rates with the LBDTW and the One Stage method are $83.3\%$ and $87.5\%$, but the recognition rate with the proposed method is $91.6\%$.

• Proceedings of the Korean Geotechical Society Conference
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• 2002.03a
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• pp.55-62
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• 2002

미소변형에서 대변형에 이르는 전체 변형률 영역의 구성모델을 ABAQUS 코드에 구현하였다. 구성모델은 비등방경화규칙에 근거한 전응력 개념의 탄소성 모델로 연약 점토나 풍화토에 적용하는 것이 가능하다. 사용된 정식화 및 알고리즘은 (1) Jaumann 응력속도를 이용한 대변형도 조건 정식화 (2) 내재적인 응력적분 (3) 일관된 접선계수를 포함하고 있다. 이를 통하여 대변형 해석을 정확하고 효율적으로 수행할 수 있었다. 예제를 통하여 새로운 구성모델과 ABAQUS 코드를 이용한 대변형 해석을 수행할 수 있음을 확인하였다. 특히 전체변형률 영역의 거동을 모델하고 범용 해석 프로그램을 이용한 비선형 대변형 해석에 적용하는 것이 가능하였다.

• Proceedings of the Korean Institute of Building Construction Conference
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• 2013.05a
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• pp.252-253
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• 2013

In this paper, we introduce the insulation of aluminum truss dry installation method for construction for the development of the Angle. Features of the development of anchor bolts have been identified as no risk of fire, and ease of construction, which has the advantage of being the adiabatic efficiency is increased. In future research, to study the angle of the field on the Application of the development for the construction.

• KIEAE Journal
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• v.12 no.3
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• pp.83-88
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• 2012

This study analyzed the measured value came out by the field test to verify the surface temperature reduction of the flat roof due to green roof, and confirmed the influence of the green roof based on it, and assessed the possibility of saving structures' energy and reducing $CO_2$ emission of structures. For the actual measurement, the differences of the average atmospheric temperature of the green roof and non-green roof flat roof were $8.67^{\circ}C$ and $0.787^{\circ}C$, and the average floor temperature gaps were $11^{\circ}C$ and $2.008^{\circ}C$ in October and November respectively. It was expected that if it's measured on around summer solstice that the temperature gets higher, the deviation of the surface temperature should be bigger, and it was confirmed that the green roof eventually raises insulating effect of structures and will influence on cooling and heating effects such as energy saving and insulating.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 2000.07a
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• pp.671-674
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• 2000

A children's electric shock accidents have broken out because children can easily insert sharp things in 220V receptacle holes. As the test result of pushing force, children's pushing force was about 2-4kg and the pushing force of sharp things was less than 2kg. Therefore, it is reason for electric shock that children's pushing force is large than pushing force of sharp things. We have measured insulation resistance for the receptacles of five companies during 50 weeks in humid condition. As these results, Insulation resistance for the receptacles of J. Co. had rapidly decreased with lapse of time. As the result for investigating the surface of receptacle by SEM and EDX, Al, Fe and Br, which weren't discovered at original form, were produced. Therefore, the receptacles of J. Co. should be the improved in the quality of insulating material because insulation resistance can be decreased in humid environment

• Journal of Ocean Engineering and Technology
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• v.13 no.1 s.31
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• pp.94-104
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• 1999

In order to evaluate the performance of axially of laterally loaded piles experimentaly, pile load tests can be carried out at the site Otherwise stress analyses or subgrade reaction analyses can solve the problem. In this study, stress analysis using FLAC code and subgrade reaction analyses using load transfer curves recommended by API(1993) were performed consistently on the basis of a result of site investigations, and the result of analyses was compared with the measured. As a result the behavior of pile heads was analyzed accurately for both axially and laterally loaded tests. Furthermore axially transferred loads were calculated appropriately for the measured and axial loads were transferred mainly mainly by the frictional resistance rather than by the tip resistance. Consequently, it can be commented that both analysis methods of soil-pile systems are applicable at teh objective site and that solutions may be more accurate if material properties from the site investigation are more explicit.

• Proceedings of the KIEE Conference
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• 2003.07c
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• pp.1753-1755
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• 2003

MOF insulating cover used in 22.9 kV substation hasn't shown good performance in terms of electrical safety because of its defect by short clearance MOF cover and each input and output wire junction part. The MOF cover is easily moved by outside environment as wind or rain weather because of different size MOF cover and insulating busing, also can be leaded to breakdown by tracking. Therefore, we propose MOF cover which effectively prevents from electrical accidents in this paper. To decrease the electric field concentrated on specific part, we roundly design the shape of MOF cover and clearance between cover and live part was adjusted to be longer than before. The proposed MOF cover is evaluated by using the electric field solution program.

• Proceedings of the Korean Nuclear Society Conference
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• 1996.05a
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• pp.594-601
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• 1996

가압기고압력 원자로정지여유도(high pressurizer pressure trip margin)에 영향을 주는 요인들에 대한 민감도 분석을 울진 3,4호기 성능해석코드인 LTCUCN computer code틀 이용하여 수행하였다. 그 결과, 초기 가압기압력, 증기우회제어계통의 quick open지연시간, 터빈우회밸브의 quick opening시간, 원자로출력 감발계통의 용량, 원자로출력감발 제어붕 낙하시간, 가압기 살수작동 설정치 둥이 완전부하상실시 가압기압력을 상승시키는 주요인자임을 알 수 있었으며, 증기우회제어계통 및 가압기살수계통의 용량은 최대 가압기 압력에 미치는 영향이 미미한 것으로 판명되었다. 울진 3,4호기의 참조발전소인 영광 3,4호기의 as-built 자료를 토대로 울진 3,4호기의 원자로정지여유도를 계산한 결과 울진 3,4호기는 완전부하상실사건시 37 psi의 정지여유도를 가질 수 있는 것으로 판단된다. 그러나, 원자로출력감발계통이 있는 ABB-CE type의 울진 3,4호기에서는 완전부하상실사건보다 원자로출력감발계통이 동작하지 않는 부하감발사건이 최대 가압기 압력치를 유발하는 사건이고, 다양한 부하상실사건중에도 운전여유도는 확보하고 있음을 알 수 있었다.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.29 no.4C
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• pp.175-182
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• 2009

The stress-strain relationship of an unsaturated soil was analyzed by Bishop stress descriptions in this study. The failure criteria could be defined uniquely by the Bishop stress and were also independent of matric suctions. In the low level of matric suctions the failure criteria have a linear relationship and the estimated criterion fitted the measured accurately. Deformation moduli in the small strain level were linearly increased generally with respect to Bishop stress.

• Proceedings of the Korean Society of Disaster Information Conference
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• 2022.10a
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• pp.185-186
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• 2022

2012년 9월부터 건설현장 위험성평가는 안전관리 업무로 의무화되었으나, 해당 근로자가 사전위험성을 추정하고 대책을 수립하여 재해예방 활동으로 연계되기에는 위험성평가 작성부터 어려움이 있다. 위험성평가 운영시스템 구축을 통해 건설현장 근로자가 해당작업의 위험요인 및 안전대책을 쉽게 파악할 수 있도록, 작업 공종 선택만으로 해당작업의 다양한 위험요인과 안전대책을 제시하고, 해당 공종에서 발생한 재해사례를 보여줌으로써 동종 재해 재발방지 대책수립이 가능하도록 시스템을 구축하였다. 이러한 위험성평가 활동의 효과분석을 위해 H건설사의 운영평가에서, 위험성평가 운영시스템 구축 이후 건설현장 근로자가 위험성평가 활용에 쉽게 접근할 수 있고 해당공정의 위험요인 추정 및 위험예방 대책 수립이 가능하게 되었으며, 평가기간 동안 재해율 감소에도 영향이 있는 것으로 분석되었다.