Dirty hummingbird feeders can harm these backyard animals. Here’s how often you should clean the bird feeder, and what to use, to avoid spreading fungal infections and making the hummingbirds sick.

The common mode rejection ratio (CMRR) of a differential amplifier (DA) using a single operational amplifier and an instrumentation amplifier (IA) using three operational amplifiers is analyzed, and ...

In this article, the design problem of the proportional-integral observer (PIO) is investigated for a class of discrete-time multidelayed recurrent neural networks (RNNs). In the addressed RNN model, ...

Bihar is also the only State that has seen its sex ratio at birth declining consistently since 2020, the year from which this data is available for the State. In 2020, the State reported a sex ...