Performance of vertical type deep UV light-emitting diodes depending on the Ga-face n-contact hole density
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DOI: 10.1063/5.0052416
Abstract: We have demonstrated a vertical UV-C LED composed of the Ga-face n-contact electrodes using the circular shape holes on mesa. In order to understand the dependence of optical performance on the mesa hole density, we… read more here.
Keywords: face contact; hole density; performance; density ... See more keywords
Hand-to-Face Contact of Preschoolers during Indoor Activities in Childcare Facilities in the Republic of Korea
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DOI: 10.3390/ijerph192013282
Abstract: Purpose: This study aimed to characterize hand-to-face contact (HFC) in children and analyze the factors that affect HFC behaviors of preschoolers in childcare facilities in Korea. Methods: Thirty preschoolers aged between 13 and 84 months… read more here.
Keywords: childcare facilities; contact; hand face; face contact ... See more keywords