개선된 강재 집수정의 적용

윤상문,Yoon, Sang-Moon 한국공간구조학회 2003 한국공간구조학회지 Vol.3 No.1

코드블록 노이즈 분산의 변화를 최소화하는 안전한 JPEG2000 스테가노그라피

윤상문,이해연,주정춘,이흥규,Yoon, Sang-Moon,Lee, Hae-Yeoun,Joo, Jeong-Chun,Bui, Cong-Nguyen,Lee, Heung-Kyu 한국정보처리학회 2008 정보처리학회논문지 C : 정보통신,정보보안 Vol.15 No.3

JPEG2000은 차세대 이미지 압축 포맷으로 JPEG에 비하여 우수한 압축률과 화질을 제공할 수 있다. JPEG2000 이미지를 커버 오브젝트로 사용하는 lazy-mode 스테가노그라피는 압축과정에서 발생하는 정보 손실에 의해 메시지가 손실되지 않도록 제안된 알고리즘으로 많은 양의 메시지 삽입이 가능하다. 그러나 이 방법은 메시지 삽입으로 인하여 코드블럭 노이즈 분산의 변화를 발생하게 되고, 이러한 특징을 기반으로 하는 Hilbert-Huang 변환 (HHT) 기반의 스테거낼리시스에 의하여 메시지 삽입여부가 탐지될 수 있다. 본 논문에서는 코드블럭 노이즈 분산의 변화를 예측하고, 이를 최소화하도록 메시지를 삽입하여 HHT 기반 스태거낼리시스에 의해 탐지되지 않는 새로운 JPEG2000 스테가노그라피 알고리즘을 제시한다. 코드블록 노이즈 분산의 변화를 예측하기 위하여 low precision code-block variance와 low precision code-block noise variance를 활용하였다. 또한 메시지 삽입 후의 높은 영상 화질을 유지하기 위하여 JPEG2000의 quality layer 정보를 활용하였다. 제안한 알고리즘의 성능을 보이기 위하여 2048장의 다양한 영상에 대하여 분석을 수행하였고, 이를 통하여 HHT 기반 스태거낼리시스 방법에 안전함을 증명하였다. JPEG2000 is the upcoming image coding standard that provides better compression rate and image quality compared with JPEG. Lazy-mode steganography guarantees the safe communication under the two information loss stages in JPEG2000. However, it causes the severe changes of the code-block noise variance sequence after embedding and that is detectable under the steganalysis using the Hilbert-Huang transform (HHT) based sequential analysis. In this paper, a JPEG2000 lazy-mode steganography method is presented. The code blocks which produce the sudden variation of the noise variance after embedding are estimated by calculating low precision code-block variance (LPV) and low precision code-block noise variance (LPNV). By avoiding those code-blocks from embedding, our algorithm preserves the sequence and makes stego images secure under the HHT-based steganalytic detection. In addition, it prevents a severe degradation of image quality by using JPEG2000 quality layer information. On various 2048 images, experiments are performed to show the effective reduction of the noise variation after message embedding and the stable performance against HHT-based steganalysis.

해양레저스포츠 지도자의 조직요인과 자기실현 및 사회적 능력의 관계

윤상문(Sang Moon Yoon),김언식(Eon Sik Kim),염두승(Doo Seoung Yeom) 한국사회체육학회 2010 한국사회체육학회지 Vol.0 No.41

This study aims at looking into the relationship between self-actualization and social competence of a marine leisure sports instructor according to organizational factors. The data gathered according to research procedure were encoded according to coding guideline. Inputting the coded data individually into computer, the researcher inspected the data through descriptive analysis, one-way variance analysis, correlation analysis and standard multiple regression analysis according to analytical purpose by using the statistics program SPSS 14.0 version for Windows. The concrete findings of the research are as follows: First, there was some relation between organizational factors and self-actualization of a marine leisure sports instructor. Second, there was some relation between organizational factors and social competence of a marine leisure sports instructor.

강재스트럿을 이용한 철근콘크리트 기초보강재의 구조성능평가

윤상문(Yoon Sang-Moon),박현미(Park Hyun-Mi),박종욱(Park Jong-Wook),이정윤(Lee Jung-Yoon) 대한건축학회 2009 大韓建築學會論文集 : 構造系 Vol.25 No.9

This paper presents a method to increase the strength of reinforced concrete foundations. In the proposed method, a steel plate was placed in the foundation to increase the strength of concrete strut. Eight foundations were tested in order to verify the proposed method. Three main parameters were considered in the experimental investigation: the strengthening of steel plate (without or with plate), depth of foundation (430 ㎜, 500 ㎜, and 700 ㎜), and loading ways(one- or two-way loading). The test results indicated that the steel plate in the diagonal concrete strut increased the strength of foundations. In addition, the strength of foundation calculated by a strut-and-tie model predicted more accuracy with the test results than that calculated by KCI-07 design code.

공기소총 사격자세의 이동형태 및 압력분포 분석

윤상문(Yoon Sang-Moon),백진호(Back Jin-Ho),손원일(Son Won-Il),석혁기(Seok Hyuk-Ki),최동순(Choi Dong-Soon) 한국체육과학회 2011 한국체육과학회지 Vol.20 No.4

The main purpose of this study was to investigate biomechanical analysis and provide basic data for technical training for air rifle shooters. We used the way to measure ground reaction force and pressure distribution to analyze the type of change in biomechanical factors like ground reaction force and pressure distribution based on movement pattern of body during shooting. As a result, there was small difference within subjects in variables of movement of body’s core during rifle shooting, but subject #1 showed very stable shooting position due to very little movement by right and left, and back and forth. Also, subject #1, #2 & #3 showed positive shooting position due to very stable pressure distribution in left and right, and back and forth as a result of measurement of pressure distribution Taken together, ideal shooting position needs to find strengths and analyze technique of shooting and apply and develop shooters’ own position instead of imitating excellent shooting position. Therefore, measurements like motion analysis and EMG are necessary for future research and cross-sectional study is also needed for generalization.

생활체육 참여자들의 스포츠 환경요인과 스포츠 가치 및 태도의 관계

윤상문(Sang Moon Yoon) 한국사회체육학회 2011 한국사회체육학회지 Vol.0 No.46

This study aims at investigating the relationship between Factors Sports Situation and Sports Worth and Attitudes of Mass Sport Participants. This study had its population from the over-6-months-long club entry members among residents of Gangwon Province Yeongdong region (Gangneung, Sokcho, Donghae and Samcheok) as of 2011. And sampling was done through stratified cluster random sampling. After collecting the response data to the questionnaire, only trustworthy data were encoded. After inputting encoded data individually into computer, multiple regression analysis was applied(α=.05) through the statistics program of SPSS 17.0 version for Windows so as to verify the relationship between Factors Sports Situation and Sports Worth and Attitudes of Mass Sport Participants. From the method and result of research above, the following conclusion was drawn: There was some relationship between Factors Sports Situation and Sports Worth and Attitudes of Mass Sport Participants.

e-스포츠 마니아 수준과 스포츠가치관 및 태도의 관계

윤상문(Yoon Sang-Moon),황향희(Hwang Hyang-Hee) 한국체육과학회 2008 한국체육과학회지 Vol.17 No.3

This research examines what kind of influences can be made on the values and attitudes about sports by the level of e-sports enthusiasts. The specific purpose is to re-clarify the values and the viewpoint of attitude that lie in the level of e-sports enthusiasts and to present positive data about the level of enthusiasts with its point and basis in the opinion that the demographic and sociological character and the levels of maniacs do make some influence on the values and attitudes about sports. statistics program, SPSS v14.0 for Windows was used to make a frequency analysis, an one-way ANOVA, a mean comparison, and an ANCOVA. Following conclusions have been drawn from the methods and results of the research above. First, the level of e-sports enthusiasts and the values about sports seem to have some relation with each other. Second, the level of e-sports enthusiasts and the attitude about sports seem to have some relation with each other.

동력수상레저기구 참여자의 감각추구성향과 심리적 행복감 및 삶의 만족 관계

윤상문(Sang Moon Yoon),김성문(Sung Mun Kim),손원일(Won Il Son) 한국사회체육학회 2011 한국사회체육학회지 Vol.0 No.46

The purpose of the studying motorizing marine leisure vehicle that targets 331 participants is to verify the relationship among; the propensity to pursue senses, the satisfaction of life and a sense of psychological happiness. To achieve this, a relation model of adventure seeking that is; the low variable of the propensity to pursue senses and psychological pleasure, psychological freedom and satisfaction of life that is the low variable of sense of psychological happiness and is determined by using SPSS12.0 and AMOS 5.0 to analyze the structure model as follows: Firstly, adventure seeking of the propensity to pursue senses influences positively the psychological pleasure and psychological freedom. Secondly, experience seeking that is; the low variable of the propensity to pursue senses doesn`t influence psychological pleasure and psychological freedom. Thirdly, psychological pleasure and psychological freedom which are aspects of psychological well-being doesn`t influence satisfaction of life. Fourthly, adventure seeking and experience seeking that are the entire propensity to pursue senses doesn`t influence satisfaction of life.

생활체육 참가가 스포츠몰입 및 운동중독에 미치는 영향

김성문(Sung Mun Kim),장진우(Jin Woo Jang),윤상문(Sang Moon Yoon) 한국사회체육학회 2008 한국사회체육학회지 Vol.0 No.32

해양/수상레저스포츠 참가자의 기본심리욕구, 운동정서 및 활력촉진의 관계

김성문(Sung Mun Kim),윤상문(Sang Moon Yoon) 한국사회체육학회 2011 한국사회체육학회지 Vol.0 No.43

The purpose of this study was to verify that the satisfaction of basic psychological needs from marine/water leisure sport activities was related to the vitality and the affirmative emotion for 220 hobbyists. The factor analysis, correlation analysis, multiple regression analysis & moderating effect were carried out by using SPSS 15.0 & AMOS 7.0 program. The results were as follows. Firstly, the competence(β=.244, p<.01), the competence(β=.222, p<.01) & the relatedness(β=.171, p<.01), the competence(β=.252, p<.01) & the relatedness(β=.206, p<.01), the autonomy(β=.151, p<.05), the competence(β=.180, p<.01) & the relatedness(β=.240, p<.01) has positive effect on the fun, the pride, the accomplishment & the vitality, respectively. Secondly, the pride of exercise emotion(β=.125, p<.05) & the accomplishment(β=.294, p<.01) have positive effect on the vitality. Thirdly, the autonomy(β=.277, p<.01) & the competence(β=.343, p<.01) have positive effect on the vitality, while the exercise emotion has no effect on the relation with basic psychological need & the vitality.