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As the obligatory use of Active-X and authentication certificate is recently abolished in the country, fintech technology newly receives the attention which enables the easy payment. But, PW based user authentication system is not free from the hacking threat that the third party falsifies the parameter values for the parameter values. In addition, the(More)
This study presents in-line digital particle holography and its application to spray droplets to measure the characteristics of spray droplets. Several important parameters at the time of hologram recording such as the pixel number of holograms, the object distance, and the part of laser beam used were verified. The optimum values of all these parameters(More)
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