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박창운 ( Chang Un Park ),박현창 ( Hyun Chang Park ),윤석주 ( Suck Ju Yoon ),( Seong-uk Jeong ) 한국액체미립화학회 2014 한국액체미립화학회 학술강연회 논문집 Vol.2014 No.-
The bio diesel had similar properties with diesel, and was well-known as the powerful alternative of the diesel and kerosene. It was available to the trafficking source for energy as well as operation fuel of the home combustor. In this paper, we were studied the atomization performance of the bio diesel in which it controls the boiler performance, and analyzed the effect of the injection pressure varied form 0.4MPa to 2MPa by experiments conditions. As the results, the flow-rate of bio diesel was increased according to increase the injection pressure, and Injection pressure of 1.5MPa was showed Fully developed bio diesel spray. Dmax, MMD and SMD were decreased with increasing injection pressure.
박창운 ( Chang Un Park ),정성욱 ( Seong Uk Jeong ),박현창 ( Hyun Chang Park ),윤석주 ( Suck Ju Yoon ) 한국액체미립화학회 2014 한국액체미립화학회 학술강연회 논문집 Vol.2014 No.-
LDPA(Laser diffraction Particle size Analyzer),that is measuring the size of the particle according to the degree of diffraction of the laser by light scattering, was selected the light-receiving lens in accordance with the working distance and measuring range. In this paper, we were performed about the effect of the light-receiving lens form R3 to R6 and used the five sprayers such as Diesel injector, Humidifier, Syringe, Burner nozzle, Paint sprayer. We were analysed the association of the both liht-receiving lens and sprayers though SMD, Dmax, Distribution. As the experimental results, The light-receiving lens form R3 to R4 were showed more accurate results for small particles than this of R5 and R6 because R3 and R4 were able to collected more of the relativelt small praticles by small measuring ranges. So, LDPA was used to measure large particles in the case of the R5 and R6. Thus, the sprayers should be a reasonable choice of the light-receiving lens.
광고 선전비가 당기순이익, 영업이익, 매출액과 기업 가치에 미치는 영향; 산업특성을 중심으로
박진 ( Jin Park ),박창운 ( Chang Un Park ) 안양대학교 사회과학연구소 2014 社會科學硏究 Vol.19 No.-
This paper investigates net income, operating income, revenue sales and firm value, change following advertising expense by industry. In this study, firms at KSE are used as our sample from 2003 to 2012. We test relation between firms financial performance such as net income, operating income, revenue sales and firm value and advertising expense by industry The results of the study are as follows: Firstly, generally different industries show different that study on advertising expense on net income, operating income, revenue sales and firm value Also, Secondly, industries with high comsumer business tend to show relation between advertising expense and net income, operating income, revenue sales and firm value. This paper findings provide an important implications to investors who are interested advertising expense. Researchers who are interested in advertising expense can also apply the discussion in this paper for the related studies.