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Recently, the automobile industry has demanded weight reduction, so research on materials is being actively conducted. Among this research, carbon fiber-reinforced composite materials are being studied a lot in the automobile industry due to their excellent mechanical properties, chemical resistance, and heat resistance. However, carbon fiber-reinforced composite materials have disadvantages, in that they are not free from color selection, and have weak interfacial bonding strength. In this study, a colored epoxy resin was prepared by mixing epoxy—which is a thermosetting resin according to the pigment concentration (0.1, 0.3, 0.5, 1.0 wt%)—and curing shrinkage. Thermal expansion characteristics were analyzed and the concentration of 0.5 wt% pigment showed the lowest shrinkage and thermal expansion characteristics. In addition, to measure the interfacial shear strength (IFSS) of the carbon fiber and the colored epoxy resin, the IFSS was obtained by performing a microdroplet debonding test, and the strength of the pigment concentration of 0.5 wt% was reduced to a relatively low level. Through these experiments, it was determined that an epoxy resin in which 0.5 wt% pigment is mixed is the optimal condition. Finally, using the composite material modeling software (Digimat 2020.0), the representative volume element (RVE) of the meso-scale was set, and interfacial properties of carbon fibers and colored epoxy resins were analyzed by interworking with general-purpose finite element analysis software (Abaqus CAE).

Objectives: The aim of this study was to examine the effects of home-based cognitive physico-occupational therapy(HBCPOT) on cognitive function, depression, and quality of life in dementia patients, using a cognitive impairment model. Methods: The data was analysed for Mini-Mental State Examination-Korean version (MMSE-KC) for assessing cognitive function, Quality of life-Alzheimer's Disease (QOL-AD) and Geriatric Depression Scale (GDS) in 31 dementia patients who received home-based cognitive physico-occupational therapy for one hour once a week for 12 weeks by a trained occupational therapist at the Dementia Prevention and Management Center of Y-city during 20111-2013. Results: Among these 31 patients, 18(58.1%) were female, and 25(80.6%) had Alzheimer's Disease. After HBCPOT, the mean scores of MMSE-KC and QOL-AD were significantly improved, but GDS score was not significantly decreased. Conclusions: It was suggested that HBCPOT was effective in improving cognitive function and quality of life.

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