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최완규,조한근 충북대학교 농업과학기술연구소 2001 農業科學硏究 Vol.18 No.-
Surface crack detection is an important aspect in the quality control process of egg markets. The acoustic vibration of an egg could be used as a critical factor in evaluating the eggshell quality. The mode shape indicates the egg vibration behavior at different locations with respect to the input impulse and provides important information for the optimum sensor location to obtain the desired acoustic measurements. Theoretical analysis and experimental measurements were conducted to determine the acoustic vibration modes in eggs. The resonant frequencies of the first and second resonance mode of intact eggs were found to be distributed between 2kHz and 7kHz range. The measured mode shapes of an egg were similar to theoretical shapes of homogeneous, elastic spheres. An elliptical deformation at the equator ring of the egg was observed. The frequency peak of this mode was dominantly present in the frequency spectrum of an intact egg impacted at its sharp position. The mode shapes related to the first resonant frequency of an egg showed that the optimum location for the measuring sensor was the 180 degrees position. A optimum location for the egg support was found to be the 90 degrees position having the smallest vibration magnitude.
슬라이스기반 정보흐름그래프에 기반한 프로그램 복잡도 측정
최완규,정문재 광주대학교 2000 産業技術硏究 Vol.14 No.-
In this paper, we developed a SIFG(Slice-based Information Flow Graph) for modeling the information flow on a program on the basis of the information flow of data tokens on the slices. Then we defined a measure, called SCM(Slice-based Complexity measure), for measuring the program complexity by measuring the complexity of the information flow on SIFG. We showed that SCM satisfied the necessary properties for the complexity measures proposed by Briand et al.