In this study, the structural analysis was carried out according to the structure of lumber support. For the optimal design of the automotive lumber support, It was examined which one was most stable among three models A, B, and C. As the result of structural analysis, all three models showed the greatest deformations at the wire portion of the lumber support, and model A showed less equivalent stress and deformation compared with models B and C. As model A showed the lowest equivalent stress and deformation among all models, model A was shown to be the model with the excellent strength. This analysis established the stable design by comparing models A, B and C. Also, It is thought that this study result can be highly utilized at the seat design of real automobile.

Skin plays important roles in protecting the internal organs from the chemical-biological risk factors and ultraviolet light. Exposure to the chemical and biological stimuli has a detrimental effect on skin's structure and physiological regulation. Therefore, much attention has been paid to natural products that show biological activities such as anti-oxidation, anti-aging and anti-bacterial activities. In this study, we investigated the skin-related biological activities of Oenothera lamarckiana aerial part extract. The extract contained 229.35 mg TAE (tannic acid equivalents)/g total polyphenolic compounds and the extract showed relative high antioxidant activity (SC50 value: 8.52 μg/mL). The IC50 value against tyrosinase and elastase were 307.94 and 181.51 μg/mL, respectively. This suggested that O. lamarckiana can be applied to whiten skin and slow the aging of skin. O. lamarckiana extract showed a growth inhibitory effect on Staphylococcu epidermidis (minimum inhibitory concentration: 250 μg/mL). Interestingly, O. lamarckiana extract showed no inhibitory effect on Pseudomonas aeruginosa on the paper disc assay. Yet the extract inhibited the growth of Pseudomonas aeruginosa on the broth dilution assay in a dose-dependent manners. Taken together, O. lamarckiana could have good potential for development as an additive in the cosmetic industry.

Ink-jet printing is a manufacturing process technology that directly prints a digitalized design pattern onto a substrate using a fine ink jetting system. In this study, environmentally friendly yellow aqueous ceramic ink is synthesized by mixture of distilled water, yellow ceramic pigment and additives for ink-jet printing. The graft polymer, which combines electrostatic repulsion and steric hindrance mechanism, is used as a surfactant for dispersion stability of aqueous ceramic ink. Synthesized ceramic ink with graft polymer surfactant shows better dispersion stability than did ceramic ink with PAA surfactant; synthesized ink also shows desirable ink-jet printability with the formation of a single ink droplet during printability test. Finally, ceramic ink printed on glass substrate and ceramic ink with graft polymer surfactant shows a high contact angle without surface treatment on glass substrate. Consequently, it is confirmed that the ceramic ink with graft polymer surfactant can achieve high printing resolution without additional surface treatment process.

As automation systems become more common, there is growing interest in functional labeling systems using organic and inorganic hybrid materials. Especially, the demand for thermally and chemically stable labeling paper that can be used in a high temperature environment above 300 oC and a strong acid and base atmosphere is increasing. In this study, a composite coating solution for the development of labeling paper with excellent thermal and chemical stability is prepared by mixing a silica inorganic binder and titanium dioxide. The silica inorganic binder is synthesized using a sol-gel process and mixed with titanium dioxide to improve whiteness at high-temperature. Adhesion between the polyimide substrate and the coating layer is secured and the surface properties of the coating layer, including the thermal and chemical stability, are investigated in detail. The effects of the coating solution dispersion on the surface properties of the coating layer are also analyzed. Finally, it is confirmed that the developed functional labeling paper showed excellent printability.

블루베리는 호산성 식물로 피트모스를 활용한 상토에서 잘 자라며 관목인 점을 고려하여 용기재배를 많이 하고 있고 또한 고령화에 대비해 생력적으로 생산할 수 있는 재배기술 개발이 요구되고 있다. 본 시험에서는 블루 베리 양액재배시 공급량 및 공급횟수가 수체생육과 과실 품질에 미치는 영향을 알아보고자 수행하였다. 시험방법은 3년생 ‘듀크’ 품종을 대상으로 피트모스와 펄라이트의 용량을 각각 130L, 40L(v/v)로 하여 용기(60×80×40cm)에 식재하고 톱밥으로 멀칭한 후 2015년과 2016년에 양액 공급량을 4L와 8L로 나누어 4월 중순부터 7월 하순까지 1회, 2회, 3회 공급하여 수체생육 및 과실품질을 조사하였다. 양액은 NO3-N 4.6, NH4-N 3.4, PO4-P 3.3, K 3, Ca 4.6, Mg 2.2mmol·L-1를 주당 공급하였다. 채소에 서 양액재배시 적정 배액율은 20∼30%로 알려져 있는 데 본 시험에서 평균 배액량은 4L 2회/7일 처리가 27%, 4L 3회/7일 처리가 29%로 다른 처리에 비해 적당하였 다. 블루베리의 생육을 보면, 생육후반 8L/3회/7일 처리에서 신초장은 31cm, 신초경은 4.2mm로 가장 컸지만 질소를 많이 줄수록 도장하는 경향이었다. 배액의 무기 성분 함량은 생육초반에 질소를 많이 흡수하는 경향이었고, 처리별 과실특성은 과립중, 가용성 고형물 함량 및 산함량 등은 처리간 유의차가 없었으며, 수량은 4L 3회/ 7일 처리가 주당 2.7kg으로 가장 많았고, 4L 1회/7일 처 리가 1.4kg로 가장 작았다. 따라서 배액량, 수량, 수체 및 과실생육 등을 감안해볼 때 블루베리 양액재배시 조 금씩 자주 공급한 처리 즉 4L 3회/7일 처리로 공급하는 것이 적당한 것으로 판단되었다.