화석에너지 고갈 · 환경오염 극복 두 마리 토끼를 잡는다

유경석,Yu, Gyeong-Seok 한국과학기술단체총연합회 2005 과학과 기술 Vol.38 No.10

스피드 스케이트선수의 보행특이성에 관한 운동학적 분석

유경석 한국체육과학회 2004 한국체육과학회지 Vol.13 No.2

The purpose of this study was to investigate the peculiarity of gait pattern with elite speed skaters. To accomplish the purpose of study, Subjects were eight female persons 21 to 23 years of age in Seoul Korea. Four of them elite were speed skaters in S Women's University and the rest of them were an ordinary female. The collected data were analyzed with VCM software using VICON 512 Motion Analyzer. Kinematic parameters that is cadence, stride length, speed, single support and angular displacement were to comparative analysis. The statistical procedure of this study was the t-test and performed by SAS package(ver 8.2). The obtained conclusion were as follows:1. According to the time variable parameter, there were no significant differences in stride length, walking speed, single support. But elite speedskate group showed a high level of cadence and significant differences(p<.05). 2. The speedskate group showed lower a level of Internal Rotation in Hip Joint, Varus/Valgus in Knee Joint than an ordinary female group and significant differences(p<.05).In conclusions, these results were interpreted to be indicative of the facts that the locomotion mechanism of speedskate group can be accounted for effective gait pattern.

교회학교를 통한 2세교육 실세화

유경석 세계기독교통일신령협회 2002 統一世界 Vol.- No.1

Disciplinary Session 9 / Sport Biomechanics / Development and Method in Sport Biomechanics Study : 가상현실환경 하에서 3차원 실시간 스포츠기술교정의 검증

유경석,김기형,김민기 ( Kyoung Sug Yoo,Ky Hyoung Kim,Min Gi Kim ) 한국체육학회 1998 국제스포츠과학 학술대회 Vol.1998 No.2

익산참여자치로의 초대

유경석 열린전북 2003 열린전북 Vol.2003 No.3

컬링 슬라이딩 시 하지관절 ROM의 Loading Response에 대한 하지제어능력이 운동수행능력에 미치는 영향

유경석 한국체육과학회 2007 한국체육과학회지 Vol.16 No.1

The literature contains a hypothesis regarding the well-timed loading response of lower limbs for the sliding in curling and how it might be related to lower joints. The purpose of this study was to compare between the kinematic variables of ROM and the plantar pressure of loading response in the feet. In order to analyze the variables between the korea national elite group(N=5) and the registered novice group(N=5), this study analyzed kinematic variables and kinetic variables, respectively. The statistical procedures of this paper was both pared t-test and linear regression analysis and performed by SPSS(ver. 12.0) As a results of the 3D video image analysis between the two groups, during FS phase the significant difference were the angular displacement of ankle joint(p<.001), the angular acceleration of knee joint(p<.01), and the angular displacement and velocity of hip joint(p<.01, p<.05). And also during SL phase, the significant difference was the angular displacement of ankle joint. As a results of the PEDAR system between the two groups, During FS phase the significant difference were CA, MF, PTI(p<.05). And during SL phase, the significant difference was CA(p<.01), respectively. As a results of analysis between ROM of acceleration and force of loading response, during FS phase the elite group showed the positive linear correlation in the ankle joint. Also during SL phase the elite group showed the positive linear correlation with the knee and ankle joints. In this study, these results concluded that the elite group showed the optimum delivery techniques such as the higher pressure of load response, the lower of body position, the larger base of support than the registered novice group.

A Biomechanical Assessment of the Sliding Motion of Curling Delivery in Elite and Subelite Curlers

유경석,박진훈,김현경 HUMAN KINETICS PUBL INC 2012 JOURNAL OF APPLIED BIOMECHANICS Vol.28 No.6

인체동작분석 시 웨이브렛 계수별 영상자료의 보간에 대한 연구

유경석,김진욱,김민기 한국체육과학회 2006 한국체육과학회지 Vol.15 No.2

The purpose of this study was to utilize the commercial CCD and Video camera which is sampling 30hz imposing limitation for human motion analysis. In order to achieved interpolation by wavelet coefficients, the fast algorithm of inverse wavelet transformation was utilized producing 60field out of normal 30field. The original data from cycling motion was analyzed the applicability using wavelet transformation by coefficient such as number of 1, 2, 3, 4 ... 10. the test were used to the angular displacement of joints and the multiple regression analysis. and these joints were both knee joint and metatasophalangel joint in lower extremity. The results of this study were as follows.First, according to analyzed angular displacement of joints, we confirmed that original data was equalized to the interpolation which is wavelet transformation 2 out of 1, 2, 3, ..., 10 coefficients in the maximum flexion and extension of knee joint and in maximum plantar flexion and dorsi flexion of metatasophalangel joint, too. Second, according to the multiple regression analysis, we showed sameness between original and interpolation data. wavelet transformation number 2 coefficient signified a coefficient of correlation .999, p= .000 and R-square 1.000 in knee and metatasophalangel joint.These results indicated that 30hz commercial image camera utilized for the human motion analysis using wavelet transformation by coefficient 2.

하중 이력에 따른 경량 잔골재 콘크리트의 초음파 특성

유경석,김지상,김익범,Yoo, Kyung-Suk,Kim, Jee-Sang,Kim, Ik-Beam 한국건설순환자원학회 2014 한국건설순환자원학회 논문집 Vol.2 No.3

본 연구는 비파괴 검사 중 하나인 초음파 펄스 속도법(Ultrasonic Pulse Velocity Method)은 시험 물질의 초음파 펄스의 이동시간을 결정하는 것으로, 지금까지 대부분의 연구는 시간 영역에서 표현된 결과만을 이용하여왔다. 그러나 시간 영역에서 초음파 펄스의 신호는 고속 푸리에 변환(FFT)를 통해 주파수 영역으로 변환할 수 있으며, 보다 유용한 정보를 얻을 수 있어, 그 방법을 활용하고자 한다. 이 논문에서는 경량 잔골재를 사용하여 다양한 하중 이력에 대한 콘크리트의 펄스 속도와 주파수 영역 신호의 변화에 대한 비교를 통해, 일반 콘크리트의 강도식의 적용성 여부, 골재 치환율 별 주파수 변화 양상, 최대주파수 분석 등의 연구를 진행하였다. 초음파 속도 측정과 강도 측정을 통해 경량 잔골재 콘크리트에 기존 압축강도식의 적용성 여부를 판단하였지만, 신뢰도 저하로 기존 제안식의 사용은 어렵다는 것을 확인하였고, 하중이력 상태에서 경량 잔골재를 사용한 콘크리트의 초음파 펄스가 주파수 영역에서 보이는 신호가 보통 콘크리트와 비교하여 차이를 보여주지 않았으며, 응력 증가 추세에 따라 초음파 속도와 최대주파수의 상관관계는 존재하나, 초음파 속도와 최대주파수는 상호 독립적인 관계임을 확인하였다. One of the widely used NDT(Non-destructive techniques) is the ultrasonic pulse velocity (USPV) method, which determines the travel time of the ultrasonic pulse through the tested materials and most studies were focused on the results expressed in time domain. However, the signal of ultrasonic pulse in time domain can be transformed into frequency domain, through Fast fourier transform(FFT) to give more useful informations. This paper shows a comparison of changes in the pulse velocity and frequency domain signals of concrete for various load histories using lightweight fine aggregates. The strength prediction equation for normal concrete using USPV cannot be used to estimate lightweight fine aggregate concrete strength. The signals in frequency domain of ultrasonic pulse of lightweight fine aggregate concrete does not show any significant difference comparing with those of normal concrete. The increases in stress levels of concrete change the pulse velocities and maximum frequencies, however the apparent relationship between themselves can not be found in this experiment.

통일사상의 본심과 양심에 관한 연구

유경석 통일사상학회 2018 통일사상연구 Vol.14 No.-

통일사상은 마음에 관해 심층적으로 성찰하고 있다. 인간 완성의 길을 하나님의 3대 축복 중 제1축복으로 보고 몸과 마음이 하나님을 중심으로 합성일체 곧 신인일 체를 이루는 것이라고 천명하고 있기 때문이다. 이 때 마음은 한 인간의 이성성상 중 성상이며 주체이다. 통일사상은 마음을 성상적 본심과 형상적 양심의 수수작용에 의한 작용체로 본다. 본심과 양심은 모두 하나님의 창조목적을 이루는 선 지향의 욕망을 갖고 있다. 그러나 인간 타락의 결과 양심은 창조본연의 마음을 이루는 마음이 아니라 자기중 심적이며 이기적인 마음으로 언제든지 변화될 수 있는 마음이 되었다. 따라서 현실 적으로 양심적이라고 말할 때 창조본연의 양심이 아니라 왜곡된 양심일 수도 있다. 통일사상은 인간 타락의 결과 하나님의 선을 지향하는 창조본연의 양심이 남아 있다고 보기 때문에 하나님을 신앙을 하지 않더라고 양심에 호소하고 양심의 지도 를 받으면 선을 이룰 수 있다고 본다. 그렇기 때문에 참부모님은 양심을 많이 말씀하 고 있다. 그러나 통일사상은 양심의 성상 곧 마음의 근본인 본심에 대해 말하고 있 어, 이제 본심에 대해 더 관심을 가지고 말할 때가 되었다고 본다. 본심복귀를 이루어 참인간됨을 이루려고 하는 인간 완성의 길을 세상 앞에 제시 하고 실천으로 증거해야 하는 것이 통일사상으로 살아가는 우리의 신앙공동체임을 드러내야 한다. 그렇게 함으로써 오늘날 참인간됨의 길을 추구하는 뭇 영혼들에게 우리의 본심복귀가 그 대안임을 확실히 해야 할 것이다. The Unification Thought introspects human minds in depth. It is because the Unification Thought clarifies that the way of human perfection is the 1st Blessing among God’s 3 Great Blessing and is to unify mind and body as one, that is, oneness of God and humankind. In this case, the mind is the internal nature (Sung-sang) of God’s dual characteristics and the subject partner. The Unification Thought regards the mind as the effect produced by the give-and-receive action between the original mind as the internal nature (Sung-sang) and the conscience as the external form (Hyung-sang). Both the original mind and the conscience have the desire to pursue the goodness which accomplishes God’s purpose of creation. After the human fall, yet, the human mind has become the mind to be able to be the self-centered mind instead of the original mind of God’s creation. Therefore, realistically speaking, the conscience can be distorted conscience than the original one of God’s creation. Because the Unification Thought asserts that the original conscience of God’s creation is still remained within fallen human beings, even though they do not believe in God, they can complete the goodness within themselves if they appeal to and receive the guidance of the original conscience. Accordingly, True Parents keep speaking the original conscience. Because the Unification Thought states the original nature which is the foundation of the mind, that is, the internal nature (Sung-sang) of the conscience, it is time to have more attention to the original nature. Our faith-based community lived by the Unification Thought must testify the way of human perfection to complete the true human beings after restoring the original nature by our own practices. Thereby, it can be certain, to all human beings who are pursuing the way of becoming the true human beings today, that our assertion to restore the original nature is an alternative.