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김경훈 한국비쥬얼디자인학회 1999 한국디자인포럼 Vol.4 No.-
In the 21st century knowledge-and-information-oriented age, individual diversity is emphasized, and information acquisition and consumption levels are heightened. This trend of the times refuses to accept the mass production system centering around the competition in price. In consequence, inevitably does come the age of value created in which quality goods are produced by the multikind and small quantitiy production system. Design along with information and communication as 21st century knowledge-based business is gaining ground as a main factor national competitiveness is dependent upon in this age. Accordingly, the purpose of this study is to analyze the process and realities of the establishment of a firm specialized in venture design, both one of knowledge-based business and one factor which decides whether in the knowledge-and-information-oriented age, the millennium, our country will gain ground as one of the leading countries in the world or it will set in the west just like the twilight of the 20th century, and try to pave the way to promote the establishment of design venture required by this age. In a knowledge-based economic society, working methods are more important than working hours, and technical knowledge is more important than general knowledge. Desire for self-achievement is to be stronger than unilateral sense of loyalty to an organization. For the country in which there are many men of great originality who can enhance value added through incessant self-improvement, self-development and self -reformation can secure competitiveness among nations in the upcoming century.
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REDUCTION OF PRESSURE RIPPLES USING A PARALLEL LINE IN HYDRAULIC PIPELINE
김경훈,장주섭,D.-S. JUNG,H.-E. KIM 한국자동차공학회 2005 International journal of automotive technology Vol.6 No.1
Pressure ripples, which are inevitably generated by a fluctuation of flow rate caused by a pump mechanism,ulic pipeline. These noises and vibration deteriorate the stability and accuracy ofhydraulic systems. The accumulator and hydraulic attenuator are normally used to reduce the pressure ripples. In thisstudy, a parallel line is introduced to the hydraulic pipeline for the hydraulic system with a bent-axis piston pump as amethod to reduce the pressure ripples. The dynamic characteristics of the hydraulic pipeline with a parallel line areanalyzed by a transfer matrix in the frequency domain. Thascertained by experiment and simulation. The results from the experiment and simulation show that the hydraulic pipelinewith a parallel line were effective in reducing the pressure ripples.
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