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Best lighting for jeans, part 1: Optimising colour preference and colour discrimination with multiple correlated colour temperatures
摘要： In this study, two psychophysical experiments, one on colour preference and the other on colour discrimination, were conducted. To investigate the colour preference for blue jeans, 27 subjects with normal colour vision were asked to rate their visual appreciation of seven pairs of jeans with a colour gradient pattern. Nine LEDs, with uniformly sampled correlated colour temperature (CCT) values ranging from 2500 K to 6500 K, were used to illuminate the jeans. These lights produced a constant illuminance of approximately 200 lux, and their colour rendering indexes were between 79 and 91. In addition, using a Farnsworth-Munsell (FM)-100 Hue Test, the blue-region colour discrimination of 42 observers was assessed for the same type but with different CCTs (2500 K–6500 K, 1000 K interval). The results indicate that there is an optimum CCT of 5500 K for jeans, at which observers were found to exhibit the greatest capability for colour discrimination and the highest rating for colour preference. Interestingly, a significant gender difference was found in this study, which had not been observed in our previous work with quite similar experimental settings but different experimental objects. The findings of this study should provide a deeper understanding for the lighting design of shopping malls for jeans.
关键词： colour preference,correlated colour temperature,gender difference,blue jeans,colour discrimination
更新于2025-09-04 15:30:14
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O12:Ce scintillator
摘要： The light yield (LY) and decay kinetics of a single crystal scintillator of Gd3Al2Ga3O12(GAGG):Ce were measured for 0.662 MeV ??- and 5.48 MeV ??-rays between ?100 ?C and room temperature. As the temperature decreased, the LY increased by 20% for ??-rays, reaching its maximum at around ?70 ?C, and increased monotonously by 50% for ??-rays. Both the rise and decay times increased gradually. Furthermore, the results indicate that pulse shape discrimination is most effective at room temperature.
关键词： Pulse shape discrimination,Light yield,Temperature dependence,Scintillator,Gd3Al2Ga3O12(GAGG):Ce,Particle detector,Decay time
更新于2025-09-04 15:30:14
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[IEEE 2017 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC) - Atlanta, GA, USA (2017.10.21-2017.10.28)] 2017 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC) - Characterization of Stilbene Scintillation Detectors with Light Guide Coupling and Silicon Photomultiplier Readout
摘要： We experimentally investigated the low energy pulse shape discrimination (PSD) capabilities of four cubic stilbene crystals with 6 mm, 10 mm, 15 mm, and 20 mm sides. We used a 6 × 6 mm2 silicon photomultiplier (SiPM) for readout, and coupled the crystals both with and without light guides, optimizing light guide wrapping for PSD. We compared the crystals’s figure of merit (FOM) dependence on light output. For the smaller three crystals, direct coupling provided better PSD (roughly 116% FOM of the guided at 100 ? 150 keVee). For the 10 mm sided crystal the trend was reversed and the light guide became advantageous (105% FOM of the direct at 100 ? 150 keVee).
关键词： organic scintillator,stilbene,Pulse shape discrimination,light guide
更新于2025-09-04 15:30:14