Essays about: "chemical clock"
Found 2 essays containing the words chemical clock.
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1. Isochrone and chemical ages of stars in the old open cluster M67
University essay from Uppsala universitet/Observationell astrofysikAbstract : The open cluster Messier 67 is known to have chemical composition, metallicity and age (~ 4 Gyr) close to the Sun. Therefore, it is advantageous for stellar physical studies and of stellar evolution, in particular for solar like stars within the cluster. READ MORE
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2. Indoor and Outdoor Measurements of Particulate Matter with the Low-Cost Optical Sensor OPC-N3
University essay from Lunds universitet/Kärnfysik; Lunds universitet/Fysiska institutionenAbstract : This paper evaluates the low-cost optical sensor OPC-N3 from Alphasense as a suitable scientific instrument for measuring particulate matter levels in air, both outdoors and in- doors. The time-keeping and data-retrieval was additionally improved by connecting the OPC-N3 to an Arduino microcontroller equipped with a real-time clock (RTC) module and an external SD card. READ MORE