Abstract: This paper describes the design of a front-end circuit consisting of an integrated preamplifier with a Sallen-Key Butterworth filter for very-high-frequency ultrasonic transducers and a ...

Green algae production is crucial in aqua-agriculture due to its roles in wastewater treatment, CO2 absorption, and oxygen release, along with its potential for valuable product synthesis. Monitoring ...

The primary objective of the present paper is to link some relevant concepts on the use of ecological agricultural practices to the production of food crops. In a special topic the Trofobiose Theory, ...