Which string method can I use to make sure that the phrase ‘invalid response’ only displays if the user has typed something other than ‘yes’ or ‘no’, without paying attention to their capitalization?

Abstract: This paper presents a precise multiport network-based array synthesis method (MN-ASM) for designing and ana-lyzing radiation patterns of reconfigurable array antennas (RAAs). The method ...

Abstract: The selection of the sensor array represents a pivotal aspect of the system design for the electronic nose (E-nose). In practical applications, achieving an optimal balance between array ...