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IEEE/ICACT20240482 Slide.16        [Big Slide]	Oral Presentation
	Final step, calculation of expanded uncertainty. It calculated by multiplying the combined standard uncertainty to coverage factor k. Since the coverage factor is determined depending on the probability density distribution of measured quantity, t-value from t- distribution with 95 % confidence level can be used in this study. As a result, PM-10 concentration in ambient air can be expressed in a simple form ¡°C¡¾U¡± Also, In this study, we calculated how much each uncertainty factor contributes to the uncertainty of the final measurement value. we compared the contributions of uncertainty components and checked important sources of uncertainty.

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