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Power Steering System의 구동력이 차량 모드주행연비에 미치는 영향
김남균(Namkyun Kim),한창호(Changho Han),김우석(Wooseok Kim),이종화(Jonghwa Lee),박진일(Jinil Park),박경석(Kyungseok Park) 한국자동차공학회 2004 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
To improve the vehicle fuel economy, various technologies have been studied. Meanwhile it deteriorates fuel economy that the increased driving torque for Power Steering System (PSS) due to weighted vehicle and widened tire for low speed driving and parking. So the larger driving torque for PSS is, the lower fuel economy is. Therefore, the study about the effect of the driving torque for PSS and the engine total friction must be preceded to improve the vehicle fuel economy. <br/> In this study, a PSS module separated from the vehicle is used to measure the driving torque for PSS with respect to the pressure of PSS. The result shows that the driving torque for PSS was in direct proportion to the pressure of PSS; 3(N-m) driving torque for PSS vs. 10(bar) pressure of PSS, and 8(N-m) vs. 40(bar). In addition, the driving torque and pressure for PSS was measured according to the engine speed in the component test condition which was in the vehicle condition. Measuring the driving torque for PSP in the vehicle condition was established by using the VeFAS which was a fuel economy analyzer developed in our lab and installing PSS By-pass line. The effect of the driving torque for PSS on the vehicle fuel economy was analyzed with FTP-75 cold start mode.
동아시아의 전쟁기념관과 역사 갈등 : '中國人民抗日戰爭紀念館’을 중심으로
박경석(Park Kyungseok) 중국근현대사학회 2009 중국근현대사연구 Vol.41 No.-
It is necessary to have a systematic understanding of historical memories to better comprehend the whole picture of historical conflicts and find ways to achieve reconciliation between the Northeast Asian countries. In that regard, one must understand what the media for the formation of the collective memory are as well as the mechanism of their activation. This study compared war memorials in Northeast Asian countries, focusing mostly on the Memorial Museum of the Chinese People's AntiJapanese War. For comparison, it discussed the Independence Hall of Korea. And I briefly mentioned the Hiroshima Peace Park of Japan. The War of Resistance Museum in China and the Independence Hall of Korea were built out of the need aroused by the controversy over the Japanese history textbooks in 1982. The flow of historical disputes and antiJapanese sentiments are contained in the exhibition narratives. The hostile narratives concerning Japan are likely to affect the collective historical memory and escalate into another historical conflict. War memorials, which are the sites of historical memory, serve as media for activation of the mechanism of historical conflicts. This shows that the conflict structure formed in the period following early modern times is presented at war memorials. That is because the establishment of a memorial is subordinate to the political and social requirements concerning historical memory. Such characteristics can also be found at the Hiroshima Peace Memorial Museum and the Hiroshima Peace Park in Japan. The war memorials covered in this paper are all ethnocentric, exclusive and lopsided toward political and social requirements as regards remembrance of the past history. Thus, they serve as media which encourage historical disputes between the countries. This is the most serious problem of the historical memory facing the people of the three Northeast Asian countries. This problem can never be settled without the three countries reaching for reconciliation through cooperation. This paper proposes the following alternatives from such a perspective: First, it is necessary to think first about whose interest the memory commemorated by a war memorial actually serves. Second, the diversity of historical memory should be secured and historical memory should be briskly communicated so that historical memory may not be influenced by political and social requirements. Third, a certain process of oblivion is necessary to secure the diversity of historical memory. It is necessary to maintain a good distance from bygones, as they only involve foregoing generations.
Kyungseok Park,DIBY PAUL,Kyung Ryl Ryu,Eun Yung Kim,Yong Ki Kim 한국식물병리학회 2006 Plant Pathology Journal Vol.22 No.4
Bacillus vallismortis strain EXTN-1 has been proved in eliciting induced systemic resistance (ISR) in several crops. The present paper described the beneficial effects of EXTN-1 in potato as increase in yield and chlorophyll content, and plant protection against Potato Virus Y and X (PVY & PVX). EXTN-1 induced systemic resistance to the plants resulting in significant disease suppression in the field. Also the plants under treatment with EXTN-1 had higher chlorophyll content. The bacterized plants had significantly higher yields over the untreated control plants. The strain induced activation of defense genes, PR-1a and PDF 1.2 in transgenic tobacco model, which indicated the possible role of both SA, and JA pathways in EXTN-1 mediated plant protection against crop diseases.
Park, Yong-Soon,Park, Kyungseok,Kloepper, Joseph W.,Ryu, Choong-Min The Korean Society of Plant Pathology 2015 Plant Pathology Journal Vol.31 No.3
Certain bacterial species associate with plant roots in soil. The plant growth-promoting rhizobacteria (PGPR) stimulate plant growth and yield in greenhouse and field. Here, we examined whether application of known bacilli PGPR strains stimulated growth and asexual reproduction in the succulent plant Kalanchoe daigremontiana. Four PGPR strains B. amyloliquefaciens IN937a, B. cereus BS107, B. pumilus INR7, and B. subtilis GB03 were applied to young plantlets by soil-drenching, and plant growth and development was monitored for three months. Aerial growth was significantly stimulated in PGPR-inoculated plants, which was observed as increases in plant height, shoot weight, and stem width. The stimulated growth influenced plant development by increasing the total number of leaves per plant. Treatment with bacilli also increased the total root biomass compared with that of control plants, and led to a 2-fold increase in asexual reproduction and plantlet formation on the leaf. Collectively, our results firstly demonstrate that Bacillus spp. promote vegetative development of K. daigremontiana, and the enhanced growth stimulates asexual reproduction and plantlet formation.
Bacillus vallismortis EXTN-1-Mediated Growth Promotion and DiseaseSuppression in Rice
Kyungseok Park,DIBY PAUL,Wan-Hae Yeh 한국식물병리학회 2006 Plant Pathology Journal Vol.22 No.3
Bacillus vallismortis EXTN-1, a biocontrol agent in cucumber, tomato and potato was tested in rice pathosystem against rice fungal pathogens viz. Magnaporthe grisea, Rhizoctonia solani and Cochliobolus miyabeanus. Apart from increasing the yield in the bacterized plants (11.6-12.6% over control), the study showed that EXTN- 1 is effective in bringing about disease suppression against all the tested fungal pathogens. EXTN-1 treatment resulted in 52.11% reduction in rice blast, 83.02% reduction in sheath blight and 11.54% decrease in brown spot symptoms. As the strain is proven as an inducer for systemic resistance based on PR gene expression in Arabidopsis and tobacco models, it is supposed that a similar mechanism works in rice, bringing about disease suppression. The strain could be used as a potent biocontrol and growth-promoting agent in rice cropping system.