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김구환(Koo-Hwan Kim),김양한(Yang-Hann Kim) 한국소음진동공학회 2014 한국소음진동공학회 학술대회논문집 Vol.2014 No.10
A method for estimating the cylindrical shape of a sound radiator is presented. It assumes that sound field can be measured by a linear array. A sound field, due to the radiator vibrating with uniform velocity, can be determined by its shape, size, and orientations. Measured data also can be varying from the arrays position. To predict the shape of radiators from these measured data, mathematical relation between geometric parameter and measured information is needed. Assume that a radiator is cylinder, the magnitude and phase of measured pressure is related with the length and diameter of radiator, respectively. In this paper, the method for estimating length and shape of a finite cylinder by using its radiated pressure is proposed and verified through experiment.
SOC사업 시공관리 프로세스 구축 : 한국 도로공사에 관하여 focused on road project
김구환,한충희,김선국 대한건축학회 2000 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.20 No.2
The absence of the SOC effective construction management process has caused many problems. Therefore, the needs of the effective construction management process has been raised. The purpose of the this research is to build the current model of construction management for Korea highway corporation and to derive inherent problems, and to suggest the direction of the effective construction management process. The construction management process of the Korea highway corporation was investigated and the as-is model bunt. Though the analysis of the as-is model, and the questionnaires and the interviews with participants of the SOC project, the problem of the current procurement process has been derived.