http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
현장정재하시험을 이용한 말뚝 거동특성 수치해석 예측기법의 신뢰성 검증
남호성,백승철,Nam, Hosung,Baek, Seungcheol 한국지반환경공학회 2017 한국지반환경공학회논문집 Vol.18 No.9
수치해석기법을 이용한 말뚝의 거동특성 예측방법은 정재하시험비가 고가이기 때문에 공사 전 말뚝의 거동을 예측할 수 있다는 장점으로 설계단계에서 널리 이용되고 있지만 그 신뢰성에 대한 연구는 부족한 실정이다. 본 연구에서는 실제 현장에서 말뚝의 거동과 수치해석으로 예측한 말뚝의 거동을 비교함으로써 수치해석 기법의 신뢰성을 검증하였다. 지반과 말뚝의 상호작용에 의한 말뚝의 거동을 정확하게 파악하기 위하여 정재하시험이 수행되는 지반에서 시추조사, 현장원위치시험 등을 통해 지반특성을 확인하였고, 실규모 정재하시험을 수행하여 말뚝의 거동특성을 분석하였다. 정재하시험이 수행된 방식과 동일하게 수치해석을 모사하여 재하시험과 동일한 하중단계에서 말뚝의 거동을 수치해석으로 모사하여 현장시험 결과와 비교함으로써 수치해석 기법의 신뢰성을 검증하였다. Numerical analysis method for prediction of pile behaviour characteristics has widely been used in detail design process before construction because field static loading test requires high cost. However, the reliability verification of numerical analysis of result is not permitted compare with field test. In this study, to verify the numerical analysis results, pile behaviour prediction was compared with field static loading test results. For exact analysis of interaction between pile and ground, soil investigation and in-situ test such as boring, SPT and bore-hole shear test were performed before pile static loading test. During the static loading test, pile behaviour characteristics were analyzed under every loading condition. After static pile loading test, numerical analysis was carried out under same condition with static pile loading test. In the numerical analysis, to apply same loading condition with each loading condition in the field test and to compare with between the results of numerical analysis, the field test results for reliability were verified with the results of numerical analysis.
남호성(Hosung Nam) 한국음성학회 2021 말소리와 음성과학 Vol.13 No.2
음성은 개별 조음 기관(입술, 혓끝, 혓몸, 연구개, 성문)에서 일어나는 협착 운동들의 시공간적 협응 구조라 할 수 있다. 다른 인간의 운동(예: 잡기)과 마찬가지로 각각의 협착 운동은 언어학적으로 의미 있는 task이며, 각 task는 그것과 관계된 기본 요소들의 시너지에 의해 수행된다. 본 연구는 이러한 음성 task가 어떻게 기본 요소들인 joint와 동역학적으로 연계될 수 있는지를 로보틱스의 관점에서 논의하고자 한다. 나아가 로보틱스의 기본 원리를 음성과학분야에 소개함으로써 운동으로서의 음성이 어떻게 발화되는지에 대한 더 깊은 이해를 가능케 하고, 실제 인간의 조음을 모방한 말하는 기계를 구현하는 데 필요한 이론적 토대를 제공하고자 한다. Speech is a spatiotemporally coordinated structure of constriction actions at discrete articulators such as lips, tongue tip, tongue body, velum, and glottis. Like other human movements (e.g., reaching), each action as a linguistic task is completed by a synergy of involved basic elements (e.g., bone, muscle, neural system). This paper discusses how speech tasks are dynamically related to joints as one of the basic elements in terms of robotics of speech production. Further this introduction of robotics to speech sciences will hopefully deepen our understanding of how speech is produced and provide a solid foundation to developing a physical talking machine.
영어 발성에서 초음파 영상 정보를 이용한 인공신경망 기반의 인강부의 추정과 평가 방법에 대한 연구
남호성(Hosung Nam) 한국음성학회 2011 말소리와 음성과학 Vol.3 No.2
Electromagnetometers (EMA) have been widely used in articulatory studies as their temporal resolution can capture most speech activities and the fleshpoint information allows one to readily quantify and analyze tongue shape. However, the drawback is that the data lacks details of activity in the pharyngeal region. Several studies have attempted to estimate the unknown pharyngeal shape of the tongue, but few studies are based on unimodal data containing both front and back regions of the tongue at the same time. We use Stone’s ball bearing method to obtain fleshpoint data as well as tongue shape. We further introduce a novel way of connecting balls and attaching them onto the tongue to ensure accurate tracking. An Artificial Neural Network is applied to build a map between observable flesh-points, unknown tongue shape, and pharyngeal region and is optimized to efficiently address nonlinearity.
메가 스포츠 이벤트 유치가 지역사회 의식과 사회변화에 미치는 영향
남호성(Nam, Ho-Sung),이재형(Lee, Jae-Hyung) 한국체육과학회 2011 한국체육과학회지 Vol.20 No.5
The purpose of this study was to analyze the effects of hosting mega sport events on perceived sense of community and social change in Korea. To accomplish such the purpose, this study selected citizens from Inchon(2014 Asian Games) and Deagu(2011 IAAF World Championships) as population and sampled a total of 556 citizens using convenience sampling method in both areas. Instruments of study were questionnaires which were identified to be valid and reliable, and data collected were analyzed through t-tests, and multiple regression analysis at the significance level of .05. Accordingly, following conclusions were derived from the study. First, significant differences existed in emotion, participation desire and evaluation sub factors in terms of pro and con variable. Also, significant differences appeared in political, economic, social and cultural change factors in terms of pro and con variable. Significant differences existed in emotion, participation desire and evaluation sub factors of perceived sense of community in terms of participation variable. Moreover, significant differences appeared in all sub factors of social change in terms of participation variable. Second, multiple regression analyses revealed that factors affecting political change were emotion, participation desire and perceived integration and those affecting economic change were emotion, participation desire and evaluation factors. Additionally, factors affecting social change were emotion, participation desire and perceived desire, whilst those affecting cultural change were all sub factors of social change in this study.
남호성(H. S. Nam),박병진(B. J. Park),김보현(B. H. Kim),주종남(C. N. Chu) 한국정밀공학회 2005 한국정밀공학회 학술발표대회 논문집 Vol.2005 No.10월
The dissolution characteristic of metal shows the different tendency according to the applied electrical potential, the kind of electrolyte and pH value, etc. In the micro electrochemical machining (ECM), unfavorable oxide/passive layer formation and overall corrosion of electrodes must be prevented. The anodic polarization curve of nickel has distinct three dissolution regions, i.e. two active regions and the transpassive dissolution region. In this paper, the stable electrode potentials of workpiece and tool were determined in sulfuric acid and hydrochloric acid solution, respectively. In each solution, different machining property was shown and possible electrochemical reactions were discussed. On the basis of this experiment, the methodology to obtain the proper electrode potential was suggested.
가시화 엔진을 이용한 스월과 분사압력이 직분식 디젤엔진의 연소에 미치는 영향에 대한 연구
남호성(Hosung Nam),정해영(Haeyoung Jeong),이기형(Kihyung Lee),이창식(Changsik Lee) 한국자동차공학회 2002 한국자동차공학회 Symposium Vol.2002 No.11
The objective of this work is to investigate the effect of swirl and injection pressure on D.I. diesel combustion by<br/> using a transparent engine system. The test engine is equipped with common rail injection system to obtain high<br/> pressure and adjust injection timing and duration. In this study, the combustion analysis and steady flow test were<br/> conducted to obtain the heat release rate from in-cylinder pressure and the swirl ratio, respectively. In addition, the<br/> spray and diffusion flame images were investigated by a high speed camera. As the results, injection pressure was<br/> found to shorten ignition delay as well as enhance peak pressure and heat release rate at premixed combustion region.<br/> However, this effect was reduced in case of swirl flow. The swirl effect was found to shorten ignition delay at certain<br/> injection timing and generally enhance heat release rate