Combat-armored vehicles were equipped with an automatic-fire-extinguishing system to ensure the safety of the crew and vehicle from fires on the vehicle. When a fire was occurred, the automatic-fire-extinguishing system automatically detects the fire through sensors and detection lines, sprays a fire extinguisher, and notifies the crew visually and audibly. Recently, there had been cases of automatic-fire-extinguishing systems malfunction on combat-armored vehicles. In this study, in order to resolve the automatic-fire-extinguisher's malfunction phenomenon, ground noise and inter-circuit noise generated from the fire detection line were identified, and the resistance connected on the circuit was revised to remove noise. As a result of resistance revision, the noises was eliminated and the electromotive force difference between input circuits was made constant, thereby improving the malfunction of the automatic-fire-extinguishing system. By applying the result, it was confirmed that the control device sensed a temperature similar to the actual temperature on actual vehicles, and it was confirmed that the automatic-fire-extinguishing system's malfunction phenomenon was not founded in the field vehicles after then.

This study was to determine some appropriate models which account for attitudes toward practice of consuming dog (ACD) as a food and as a companion animal. Two models, one for males and the other females, were found from 670 community-dwelling respondents of the Gwangju Metropolitan area who aged 17～66 years. Age, keeping dog or willing to keep dog, and frequency of consuming dog as a food (FD) were exogenous variables in the models while attitudes toward companion animal were a mediating variable. The two models were slightly different, but the most influential variable accounting for the ACD was the FD. The findings of this study on the ACD were discussed in two dimensions of affect and utility which were motivational attitudes to animal. People who are against consuming dog meat as food would think of all dogs as only affectionate objects, and their points of view were discussed in the context of both keeping dog and restricting dog meat consumption. On the other hand, people who are for consuming dog meat would think of dogs as either affectionate or utilized objects, and their points of view were discussed in the context of halving dogs into companion dog and edible dog.

C/SiC composites were prepared by boron nitride (BN)-assisted liquid silicon infiltration (LSI), and their anti-oxidation and mechanical properties were investigated. The microstructures, bulk densities, and porosities of the C/SiC composites demonstrated that the infiltration of liquid silicon into the composites improved them, because the layered-structure BN worked as a lubricant. Increasing the amount of BN improved the anti-oxidation of the prepared C/SiC composites. This synergistic effect was induced by the assistance of BN in the LSI. More thermally stable SiC was formed in the composite, and fewer pores were formed in the composite, which reduced inward oxygen diffusion. The mechanical strength of the composite increased up to the addition of 3% BN and decreased thereafter due to increased brittleness from the presence of more SiC in the composite. Based on the anti-oxidation and mechanical properties of the prepared composites, we concluded that improved anti-oxidation of C/SiC composites can be achieved through BN-assisted LSI, although there may be some degradation of the mechanical properties. The desired anti-oxidation and mechanical properties of the composite can be achieved by optimizing the BN-assisted LSI conditions.

Antigen production in plant is a safe and effective strategy for vaccine development. In this study, rice transformants were developed for oral vaccine against pigs diarrhea disease. DNA cassette composed with the cholera toxin subunit B (CTB) connected to the 987P-fasG, for stimulating a strong oral immune response, was introduced to rice through Agrobacterium mediated genetic transformation. Copy number analysis by TaqMan real-time PCR for transgenes revealed that transgene of 1 to 8 copies have been introduced into T1 and T2 rice seeds. The expression level of mRNA in the transformants T1 and T2 generations were up to 35 times higher than the reference value in the result of analysis by Quantitative real time-PCR. In addition, the callus cultured from rice transformants was confirmed that the introduced gene has been maintained till 9-month subculture duration. The amount of mRNA expression value was also confirmed in callus, which was maintained above 2.6 times compared with that of the standard control for a long time. These results provide that the introduced antigen for plant-based vaccine against bacterial diarrhea disease can be maintained in the callus as well as in the transgenic plant and suggest that the callus culture of plant transformant will be an effective way to obtain a plant-derived edible vaccine.

본 연구는 우수 바둑선수의 심리적 강점에 대한 과정을 이해하고자 질적 연구 방법 중 Strauss와 Corbin(1990)의 근거이론 방법에 따라 분석하였으며 그 결과는 다음과 같다. 첫째, 바둑 경기력과 밀접하게 관련된 심리적 강점은 의지력, 집중력, 자신감, 평정심의 4개 영역으로 나타났다. 둘째, 심리적 강점 중 의지력은 프로 입단 준비과정과 끈기와 인내심 훈련을 통해 길러졌고, 집중력은 공부과정과 다양한 대국경험을 통해 형성되었다. 자신감은 성공 경험이나 준비 상태를 유지하려는 노력에 의해 형성되었으며, 시합전 관리와 시합 상황을 조절하는 노력을 통해 평정심이 만들어진다고 인식하였다. 셋째, 심리적 강점은 평소에 바둑 중심의 삶, 효율적인 생활을 하는 데 영향을 미쳤다. 시합 전에는 방해요인을 차단하고 적절한 심리 상태를 만들고, 시합 중에는 감정을 조절하고 현재의 최선을 찾도록 도움을 주며, 시합 후에는 상황 분석이나 건설적인 대처를 하도록 영향을 주는 것으로 밝혀졌다. 넷째, 근거이론에 따른 심리적 강점의 개념 모형을 살펴보면, 우수 바둑선수의 심리적 강점은 목표설정이라는 인과적 조건, 고유특성과 동기의 형성이라는 맥락적 조건을 갖는다. 사회적 지지라는 중재적 조건의 영향으로 강화된 심리적 강점은 자기관리와도 상호작용하게 되며, 시합 수행의 자동화, 생활 기술로의 일반화로 이어지는 것으로 나타났다

Ginseng(Panax ginseng C.A. Meyer) is a perennial herbaceous plant which grows very slowly. It takes about 3 to 4 years from seeding to collecting the ripe seeds and the ginseng propagation is very difficult. and so, it is very difficult to breed ginseng plant. Ginseng tissue culture was started from at 1960, and ginseng commercial product by in vitro callus culture was saled, however upto now, regenerants were not planted to soil normally. Recently, plant genetic engineering to produce transgenic plants by introducing useful genes has been advanced greatly. In a present paper, transformation of ginseng plants was achieved by co-cultivation with Agrobacterium harboring the binary vector coding Proteinase-II gene, which confer resistant or tolerant to insect pests, The binary vector for transformation was constructed with disarmed Ti-plasmid and with double 35S promoter. The NPT II gene and introduced genes of the transgenic ginseng plants were successfully identified by the PCR. Especially the transgenic ginseng plants were regenerated using new techniques such as repetitive single somatic embryogenesis.