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고무와 섬유로 구성된 복합체 내의 섬유 끝 부분의 원형 균열에 대한 J-적분
양경진,강기주,Yang, Gyeong-Jin,Gang, Gi-Ju 대한기계학회 2002 大韓機械學會論文集A Vol.26 No.4
An equation of J-integral for a penny-shaped crack at the end of the fiber embedded in rubber matrix is proposed. The values of J-integral for the specimens with various crack and specimen radius are obtained by FEA(Finite Element Analysis). The dimensional analysis is applied to derive an equation of J-integral as a nonlinear elastic energy release rate. The geometry and deformation calibration function in an equation of J can be expressed in a separated form. The geometry calibration function characterizing the effects of cord and specimen size is expressed in a polynomial form of fourth order. The deformation calibration function characterizes the effect of the overall level of strain. As approaching the infinitesimal strain, the value of the deformation calibration function approaches the results of LEFM(Linear Elastic Fracture Mechanics).
여자축구동호인이 지각하는 동기분위기, 실패공포, 운동지속의도 간의 구조관계 검증
양경진,권성호,이승주 한국체육학회 2023 한국체육학회지 Vol.62 No.4
The purpose of this study was to examine the effect of the motivational climate(mastery/performance) perceived by women's soccer club members on fear of failure and exercise adherence intention. This study was a cross-sectional study that measured the mastery climate, performance climate, fear of failure, and exercise adherence intention for participants. A total of 293 data were utilized for data analysis process, and descriptive statistics, reliability analysis, correlation analysis, confirmatory factor analysis, and structural equation model analysis using SPSS 26.0 and AMOS 26.0 program. The results indicated that the perception of the mastery climate had a direct positive effect on the exercise adherence intention, and also lowers the level of fear of failure, which had a positive effect on the exercise adherence intention. While, the perception of the performance climate increases the level of fear of failure, which negatively affected the exercise adherence intention. The results of this study suggest that the level of fear of failure may vary depending on the type of motivational climate, which may also affect the exercise adherence intention. Also, this study implied the role of coaches as a method for participants in women's soccer clubs to continue to participate in sports.
당뇨병 치료 이행과 합병증 검사 수검에 영향을 미치는 개인과 지역 요인: 다수준 분석
양경진,양정연,이준협 사단법인 대한보건협회 2023 대한보건연구 Vol.49 No.2
연구목적: 당뇨병의 낮은 치료율과 조절률, 당뇨병 관리에 대한 지역 간 격차 발생에는 환자 개인의 특성 뿐만 아니라 거주하는 지역의 특성이 영향을 미친다. 따라서 본 연구에서는 다수준 분석을 통해 당뇨병 관리에 영향을 미치는 개인과 지역 수준의 특성을 구분하여 분석하고, 영향요인을 파악하고자 한다. 연구방법: 질병관리청이 주관하는 2019 지역사회건강조사 자료를 활용하여 당뇨병을 진단받은 25,831명의 대상자와 229개 시·군·구 지역 자료를 이용하여 다수준 로지스틱 회귀분석을 실시하였다. 연구결과: 당뇨병 치료 이행과 합병증 검사 수행에서 모두 지역 특성에 의한 차이가 존재했다. 개인 특성에서는 연령, 교육 수준, 경제활동 여부, 가구 균등화 소득, 주관적 건강 수준, 저염식이의 실천 여부가 당뇨병 치료 이행과 합병증 검사 수행에 공통으로 영향을 주었다. 지역 특성의 경우 인구 50만 이상의 대도시, 1인 가구 비율이 낮은 지역, 보건기관 이용률이 높은 지역은 당뇨병 치료 이행에 긍정적 영향을 주었다. 고령화 비율이 높은 지역, 병상 수가 많은 지역은 합병증 검사 수행에 부정적인 영향을 주었다. 결론: 당뇨병의 관리 역량을 향상하기 위해서는 개인의 특성뿐만 아니라 지역의 인구 구성, 의료 자원 등을 다각적으로 고려해야 한다. 또한, 지역 보건기관 중심의 공공 일차의료 강화를 통해 지역 간 격차를 감소시킬 수 있을 것이다. Objective: Low treatment and control rates in diabetes management and regional disparities in diabetes care are influenced not only by patient characteristics but also by regional factors. Therefore, this study aimed to identify individual and regional level factors that affect diabetes management through multilevel analysis and to identify influential factors. Methods: A multilevel logistic regression analysis was conducted using data from the 2019 Community Health Survey. The study included 25,831 individuals diagnosed with diabetes and 229 local government areas. Results: Differences in regional characteristics were found to affect both adherence to diabetes treatment and complication testing. In terms of individual characteristics, age, education level, economic activity status, income level, subjective health status, and adherence to a low-sodium diet were identified as common factors influencing both adherence to diabetes treatment and complication testing. Among regional characteristics, areas with populations of more than 500,000, low rates of single-person households, and high rates of health facility utilization had a positive effect on adherence to diabetes treatment. Conversely, areas with high proportions of elderly residents and a high number of hospital beds had a negative effect on complication testing. Conclusion: To improve diabetes management capacity, it is necessary to consider various factors, including individual characteristics and regional factors such as population composition and medical resources. Strengthening public primary healthcare services in local health facilities may help reduce regional disparities.
양경진,강기주,박상서,Yang, Gyeong-Jin,Gang, Gi-Ju,Park, Sang-Seo 대한기계학회 2000 大韓機械學會論文集A Vol.24 No.1
A method to measure the crack length in rubbery materials is described. Through dimensional analysis and experiments, an equation is derived to give the crack length as a function of the change of strain energy density in a region remote from the crack. The function is provided in a form of separated terms of loading and material, the validity of which is experimentally proved using separation parameters.
초고온가스원자로 열원 SI 공정을 이용한 원자력수소생산시스템 비용 예비 분석
양경진(Yang, Kyoung-Jin),최재혁(Choi, Jae-Hyuk),이기영(Lee, Ki-Young),이태훈(Lee, Tae-Hoon),이경우(Lee, Kyoung-Woo),김만응(Kim, Mann-Eung) 한국신재생에너지학회 2009 한국신재생에너지학회 학술대회논문집 Vol.2009 No.06
As a preliminary study of cost estimates for nuclear hydrogen systems, the hydrogen production costs of the nuclear energy sources benchmarking GT-MHR are estimated in the necessary input data on a Korean specific basis. G4-ECONS developed by EMWG of GIF in 2008 was appropriately modified to calculate the cost for hydrogen production of SI process with VHTR as a thermal energy source rather than the LUEC. The estimated costs presented in this paper show that hydrogen production by the VHTR could be competitive with current techniques of hydrogen production from fossil fuels if CO₂ capture and sequestration is required. Nuclear production of hydrogen would allow large-scale production of hydrogen at economic prices while avoiding the release of CO₂. Nuclear production of hydrogen could thus become the enabling technology for the hydrogen economy. The major factors that would affect the cost of hydrogen were also discussed.