Essays about: "chemical clock"

Found 2 essays containing the words chemical clock.

1. 1. Isochrone and chemical ages of stars in the old open cluster M67

   University essay from Uppsala universitet/Observationell astrofysik

   Author : Julia Ahlvind; [2021]
   Keywords : solar twin; Messier 67; M67; open cluster; isochrone; chemical clock;

   Abstract : 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

3. 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 institutionen

   Author : Ellen Grace Soroka; [2020]
   Keywords : Physics and Astronomy;

   Abstract : 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