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具哲會,安錫出,金星彬 한국인쇄학회 1983 한국인쇄학회지 Vol.1 No.-
Reproduced colors which are half-tone printed at the rate of 10, 20, 30 ...100% half-tone dot area by each process ink- cyan, magenta, yellow and at the rates of 0, 30, 60, 100% half-tone dot areas by the mean color mixing of black, cyan, magenta and yellow, are matching the Munsell color system. Espacially, magenta and secondary colors which are contained magenta, do not have good uniformity and proportionalization in the dominant wavelength and the excitation purity. Half-tone colors without reflection of blue light, are reproduced ideal color with the excitation purity 100% in waveelengths from 555nm to 600nm
문귀원,구철회,이성윤,구인회,안상일 항공우주시스템공학회 2022 항공우주시스템공학회지 Vol.16 No.6
This study measured the radio environment of 10 domestic institutions with CubeSat ground stations for 24 hours in three frequency bands (VHF/UHF/S-band) allocated by the International Telecommunication Union (ITU). The impact of the RF environment around the ground stations on CubeSat downlink frequencies was analysed and compared with acceptable interference noise requirements from the CubeSat RF link. The findings indicate that not only the selection of downlink frequency but also the configuration of RF communication link design and ground station system of CubeSat should consider the S-band RF environment around the ground station due to the presence of several wireless devices.