A biosensor strip having a low profile for reducing the volume of liquid sample needed to perform an assay. Systems automatically determine whether a UPS device is capable of protecting system resources by comparing the UPS capabilities against system requirements. A cooling system is connected to the power control module. The post-filter is generated based on a generative statistical model for modeling signal and noise sources at distinct regions in a signal field that considers prior distributions trained to model an instantaneous direction of arrival for signals captured by sensors in the array. The flexible drive shaft may be configured to impart a driving motion to a knife supporting assembly supported within the end effector.