Eta Carinae is a massive star known for its diverse population of circumstellar ejecta. One specific component of Eta's ejecta with a radial velocity of -513 km/sec has been found to be conducive to the formation of molecules, and CH and OH have most likely been identified there. We first undertook statistical equilibrium modeling with the most recent version of the photoionization code CLOUDY to find the range of physical parameters that would explain the abundances of the observed species in the -513 km/sec component.
Acoustic wave sensors have promising applications in fields such as medicine, law enforcement, and agriculture. In the field of medicine, acoustic wave biosensors can be used to detect the presence of protein markers in patients with certain types of cancer. In developing these devices, resonance frequency tracking is important for testing their functionality. Traditionally, oscillator circuits are used for tracking the resonance frequency of acoustic sensors. However, these oscillator circuits are costly and difficult to adapt to the different frequency ranges of acoustic sensors.