영상기반의 안정적 수신호 인식기를 위한 손동작 패턴 설계 방법

손수원(Suwon Shon),배정훈(Jounghoon Beh),양철종(Cheoljong Yang),왕한(Han Wang),고한석(Hanseok Ko) 大韓電子工學會 2011 電子工學會論文誌-SP (Signal processing) Vol.48 No.4

본 논문에서는 수신호 인식기에 쓰이기 위한 분별성 있는 손동작을 만드는 방법을 제안한다. 기존의 수화DB에서 손의 움직임을 분석하여 기본 동작이 되는 4가지의 모션 프리미티브를 선정하였으며, 선정된 모션 프리미티브를 조합하여 구별성 있는 ‘기본 손동작 집합‘을 제작하였다. 제안하는 ‘기본 손동작 집합‘ 의 구별성을 증명하기 위하여 ’기본 손동작 집합‘ 인식기를 만들고 인식결과를 확인하였다. 사용된 인식기는 hidden Markov model (HMM) 을 기반으로 제작되었다. 기본 손동작 인식 task에 대한 성능평가 결과 99.01%로써 각 모델 간에 높은 구별성을 보이는 것을 확인할 수 있었다. This paper proposes a language set of hand motions for enhancing the performance of vision-based hand signal recognizer. Based on the statistical analysis of the angular tendency of hand movements in sign language and the hand motions in practical use, we construct four motion primitives as building blocks for basic hand motions. By combining these motion primitives, we design a discernable ‘fundamental hand motion set’ toward increasing the hand signal recognition. To demonstrate the validity of proposed designing method, we develop a ‘fundamental hand motion set’ recognizer based on hidden Markov model (HMM). The recognition system showed 99.01% recognition rate on the proposed language set. This result validates that the proposed language set enhances discernaility among the hand motions such that the performance of hand signal recognizer is improved.

Modelling of methane dry reforming in fixed-bed reactor

손수원,구보람 한국공업화학회 2022 한국공업화학회 연구논문 초록집 Vol.2022 No.-

고고학과 지반공학의 컬래버

손수원 한국지반공학회 2022 지반 : 한국지반공학회지 Vol.38 No.1

이중 슬립마찰면을 이용한 면진장치의 면진성능평가

손수원,권정호,김정곤,정용규,황은동,Son, Su-Won,Kwon, Jeong-Ho,Kim, Jung-Gon,Jung, Yong-Gyu,Hwang, Eun-Dong 한국재난정보학회 2020 한국재난정보학회 논문집 Vol.16 No.4

연구목적: 최근 국내 규모 5.0이상의 지진으로 인한 피해 발생이 증가하고 있다. 지진이 발생하면 구조물 이외에도 내부설비, 전력기기 등에 피해를 주게 된다. 이에 본 논문에서는 지진으로 인한 배전반과 같은 전기기기의 피해를 저감시킬 수 있는 이중 슬립마찰면이 있는 면진장치를 개발하였으며, 이에 대한 면진성능을 평가하였다. 연구방법: 면진성능을 평가하기 위해 진동대 시험을 수행하였으며, 면진장치 유무에 따른 성능비교를 수행하였다. 다양한 주파수와 가속도 수준에 대한 응답가속도 및 변위를 비교하여 면진장치의 감쇠효과를 분석하였다. 연구결과: 시험결과, 면진장치가 설치되어 있는 경우가 면진장치가 설치되어 있지 않은 경우보다 가속도 증폭이 최대 42% 작았다. 이는 면진장치의 이중슬립마찰면 사이에서 발생한 변위가 지진에너지를 소산하는 역할을 하여 증폭에너지가 감소된 것으로 판단된다. 결론: 이중 슬립마찰면을 적용한 면진장치는 약진보다는 강진에서 지진감쇠효과가 더 컸으며, 주파수가 클수록 지진감쇠효과가 더 좋았다. 따라서, 배전반과 같은 전기기기에 적용하여 지진에너지를 감쇠하는 작용을 할 수 있을 것으로 판단된다. Purpose: The damage from earthquakes with a magnitude of 5.0 or greater Korea has increased in South Korea. When a earthquake occurs, internal facilities and electric equipment besides urban structures will be damaged. Thus, in this paper, an earthquake-induced seismic isolation device with double slip fiction surfaces which can reduce the damage of electric power equipment such as distribution panel and then the seismic performance was evaluated. Method: To evaluate the seismic performance shaking table test was performed, a seismic performance comparison was performed according to the presence or absence of a seismic isolation device. The attenuation effect of the seismic isolation device are analyzed by comparing response acceleration and displacement for different frequencies and acceleration levels. Result: As a result of the test, the acceleration amplification was up to 42% less than when the seismic isolation device was installed in comparison to the other case without the seismic device. This is believed that the amplification energy has reduced because the displacement between the double slip friction surfaces of the seismic device play a role in dissipating the seismic energy. Conclusion: The seismic device with double slip friction surfaces has a greater earthquake attenuation effect in strong earthquakes than in weak ones, so the greater the frequency, the better the earthquake attenuation effect. Therefore, it is judged that earthquake energy can be decreased by applying to electric equipment such as distribution panels.

Comparison of detailed surface reaction mechanisms and lumped kinetics for dry reforming of methane (DRM)

손수원,구보람 한국공업화학회 2022 한국공업화학회 연구논문 초록집 Vol.2022 No.1

한반도 전통 토목기술의 현대 공학적 해석 - 삼국시대 토성, 제방, 대지의 축조공법을 중심으로 -

손수원,이성준 충남대학교 백제연구소 2023 百濟硏究 Vol.78 No.-

This study reviewed cases in which the archaeological construction hypotheses of excavated sites, such as earthen walls, embankments, and site formations, were analyzed using civil engineering methods. In order to interpret the characteristics of the sites presented from the archaeological point of view, ground investigations, soil tests, and model tests were conducted, and the construction scenarios of the sites were verified using computer modeling techniques. The result of an archaeological investigation that the size of the east wall of Pungnaptoseong in Seoul was enlarged through the process of extension is engineering probable, and the point of view that the wooden fence confirmed at the upper part of the wall in the Haman Gayari site was a defensive device is also a factor to be considered meaningfully. The stone layer confirmed at the lower part of the central girder of Gimje Byeokgolje can reduce the heaving of the ground under the water gate, and the prototypes of the Haman Gayari embankment and the Ulsan Yaksa-dong embankment were derived from the slope stability rate and water infiltration analysis. Sedimentary layer of plant organisms, from which wooden tablets were intensively excavated from Seongsansanseong Fortress in Haman, must have functioned as a drainage material to keep the water level inside the surface below a certain level after the fortress wall was completed. The construction method of site formation at Gongsanseong Fortress is an engineering way to prevent collapse due to slope and safely construct it. In order to analyze the construction hypothesis of such sites engineeringly, it is most important to improve the reliability of archaeological data. Efforts are needed to build a research model for the analysis of the remains by participating in the engineering field from the planning stage of the excavation investigation.

Text Independent Speaker Verficiation Using Dominant State Information of HMM-UBM

손수원,노진상,김성수,이재원,고한석,Shon, Suwon,Rho, Jinsang,Kim, Sung Soo,Lee, Jae-Won,Ko, Hanseok The Acoustical Society of Korea 2015 韓國音響學會誌 Vol.34 No.2

본 논문에서는 Hidden Markov Model(HMM) - Universal Background Model(UBM)의 주 상태 정보 기반의 i-vector 추출 기술을 제안한다. Ergodic HMM이 UBM을 추정하는데 쓰였으며, 이를 통해 동일 화자 음성에도 다양하게 존재하는 특성을 HMM states로 분류할 수 있다. 제안한 방법을 이용하면 HMM의 state 개수에 따라 i-vector 들이 추출되는데, 주 상태 정보 방법을 통해 이들 중 하나를 선택한다. 제안한 방법을 검증하기 위해 National Institute of Standards and Technology(NIST) Speaker Recognition Evaluation(SRE) database를 이용하여 실험을 하였으며, Equal Error Rate(EER) 성능 수치에서 12 %의 성능 향상을 확인할 수 있었다. We present a speaker verification method by extracting i-vectors based on dominant state information of Hidden Markov Model (HMM) - Universal Background Model (UBM). Ergodic HMM is used for estimating UBM so that various characteristic of individual speaker can be effectively classified. Unlike Gaussian Mixture Model(GMM)-UBM based speaker verification system, the proposed system obtains i-vectors corresponding to each HMM state. Among them, the i-vector for feature is selected by extracting it from the specific state containing dominant state information. Relevant experiments are conducted for validating the proposed system performance using the National Institute of Standards and Technology (NIST) 2008 Speaker Recognition Evaluation (SRE) database. As a result, 12 % improvement is attained in terms of equal error rate.

경주 쪽샘 44호분 토목공학적 분석

손수원,김진만 한국고고학회 2023 한국고고학전국대회 발표문 Vol.- No.47

테프론 또는 제강슬래그를 활용한 기초형 지진격리장치의 면진 메카니즘 평가

손수원,강인구,Pouyan Bagheri,김진만 한국지반공학회 2018 한국지반공학회논문집 Vol.34 No.1

In this study, seismic performance of geotechnical seismic isolation system capable of primary seismic isolation in the ground was evaluated. 1-G shaking table test was used to assess the performance of Teflon or steel slag as geotechnical seismic isolation systems installed beneath superstructure foundation. Response acceleration and response spectra were analyzed considering different input motions. The results were compared with those of fixed foundation structure without seismic isolation system. The steel slag-type seismic isolation system showed significant reduction in acceleration. The teflon-type seismic isolation system did not show significant effects on acceleration reduction in low-to-moderate seismicity condition, but it did show better effects in case of strong seismic condition. As input motion was transferred to the upper mass, the response spectrum of the fixed foundation structure was amplified in the short period range. In contrast, the response spectrum of the structure with seismic isolation using teflon or steel slag amplified in the long period range. It is found that the change of periodicity and the friction characteristics between isolation materials and foundations affected acceleration reduction.

공학적 분석을 통한 벽골제의 축조과정 복원

손수원,김진만 원광대학교 마한백제문화연구소 2019 馬韓, 百濟文化 Vol.34 No.-

In Korea, many reservior embankments, such as Gimje Byeokgolje, Jecheon Uirimji, Miryang Susanje, have remained for many years. These reservoir facilities can be maintained for a long time because of the high level of civil engineering technologies in ancient times. Among them, Gimje Byeokgolje is very old and large reservoir constructed in 330s and expanded on 790s. In modern times, however, many historic sites were lost during the Japanese rules. Since 1975s, the Gimje Byeokgolje has been continuously investigated. In addition, various information such as construction method of floodgate, embankment construction method and size, trial digging survey, fuction of the embankment, and the existence of the raceway were investigated. In this paper, based on the construction technique of Byeokgolje previously investigated, the finite element analysis method used in civil engineering was approached and analyzed from different viewpoint. The archaeological data of Byeokgolje were analyzed and classified into civil engineering. Computer numerical analysis was performed by modeling the classified soil layers, and the stability and infiltration phases of reservoir embankment was analyzed. The construction process of the Jungsimgeo through the existing excavation research did not have much problem in terms of stability, and there was no singularity about the construction stage. As a result of infiltration analysis on reservoir embankment slope, infiltration was made into silty and organic horizon soil layers with relatively low permeability coefficient. It was judged that it would be stable even if it was more inclined or higher than the estimated slope and height. 국내에는 김제 벽골제, 제천 의림지, 밀양 수산제 등과 같은 많은 저수지 제방이 오랜 세월을 견디며 현재까지 유지되고있다. 이러한 저수지 제방같은 수리시설이 오랜 기간동안 무너지지 않고 유지할 수 있는 것은 고대에도 높은 수준의 토목기술이 있었기 때문으로 판단된다. 이 중에서 김제 벽골제는 330년에 만들어지고 790년에 증축된 아주 오래되고 규모가 큰 저수지이다. 하지만, 현대에 들어 일제강점기를 거치면서 많은 유적지 부분이 소실되었다. 그 후, 1975년부터 현재까지 김제 벽골제에 대한 조사가 계속 이루어지고 있으며, 수문의 축조방법, 제방 성토방법과 규모, 시굴조사, 제방의 기능파악, 도수로의 존재유무 등 다양한 정보가 조사되었다. 본 논문에서는 기존에 조사되었던 벽골제의 축조기법을 바탕으로 토목공학에서 사용되는 유한요소해석 방법을 이용해 다른 각도로 접근하여 분석해 보았다. 벽골제의 고고학적 자료를 분석하여 지반의 토층을 토목공학적으로 분류하였다. 분류된 토층으로 모델링을 하여 컴퓨터 수치해석을 수행하였으며, 그 결과를 통해 저수지 제방의 안정성과 침투형상을 분석하였다. 기존 발굴조사를 통해 밝힌 중심거의 축조과정은 안정성 측면에서 큰 문제가 없었으며, 축조 단계에 대한 특이점은 없었다. 저수지 제방 사면에 대한 침투해석 결과, 투수계수가 상대적으로 낮은 실트질 및 부엽층으로 침투가 이루어지고 있었으며, 현재 추정한 것보다 좀 더 경사가 있거나 제방의 높이가 더 높았어도 안정할 것으로 판단되었다.