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이영휘,정강복,Lee, Young-Huy,Jeong, Ghang-Bok 한국지반공학회 2008 한국지반공학회논문집 Vol.24 No.11
The characteristic of induced anisotropy is investigated in this study for the Pohang mudstone involving the cut plane discontinuity. The uniaxial and triaxial compression tests are performed for anisotropic rocks with artificial joint to look into anisotropic strength characteristics. Both the uniaxial compressive strength and triaxial compressive strength show the lowest value at the angle of cut plane, ${\beta}=30^{\circ}$ and the shoulder type of anisotropy is obtained. Anisotropy ratio (Rc) in uniaxial compression measures 9.0, whereas Rc=1.29-1.98 in triaxial compression is appeared. A series of analyses are made with the test results to derive the suitable parameter values when it is applied to the Ramamurthy (1985) failure criterion. The result of uniaxial compression test is analyzed by introducing the n-index into Ramamurthy failure criterion. The result shows that, n=l is suitable for ${\beta}=0^{\circ}{\sim}30^{\circ}$ and n=3 is suitable for ${\beta}=30^{\circ}{\sim}90^{\circ}$. To analyze the result of triaxial compression test by Ramamurthy failure criterion, anisotropy ratio in uniaxial compression test is added to Ramamurthy's equation and material constants are estimated by modified Ramamurthy's equation. When these values are applied back to Ramamurthy failure criterion, the predicted values are well fitted to the test results. And strength anisotropy for failure criteria of Jaeger (1960), McLamore & Gray (1967) and Hoek & Brown (1980) are also investigated.
재가복지서비스 신청 치매노인 주부양자의 부양부담감 영향 요인
이영휘(Lee Youngwhee),김화순(Kim Hwasoon),조인숙(Cho Insook) 기본간호학회 2008 기본간호학회지 Vol.15 No.3
Purpose. The purpose of the study was to identify the factors, which predict care burden perceived by caregivers of elders with dementia. Methods: The participants in this descriptive survey were 92 caregivers who used one of six daycare centers located in Incheon. The data were collected by questionnaires composed of items on general characteristics of the elders and caregivers, care burden, caregiver fatigue, and functional status of the elders. Results: General characteristics of the elders associated with care burden were age, gender, religion, and the presence of a spouse. Features of caregivers related to care burden were education, relationship with elderly, amount of rest, intention to care, monthly family income, and perceived family economic status. There were significant correlations among care burden, fatigue of caregiver and functional status of the elders. In stepwised multiple regression analysis, significant influencing factors were identified as caregiver fatigue, functional status of the elders, intention to care, relationship with the elders, amount of rest and elder's gender. Those variables explained 46% of variance of care burden. Conclusion: Functional status of elders and amount of rest were significant predictors and are supported by other previous studies. Future interventions for caregivers need to be focused on the slowing down of functional status of elders and increasing of number and length of caregiver's rest periods.