location. The system and method may be used, for example, to actuate a remote tool. The system comprises a transmission apparatus located at the transmission node. The transmission apparatus is in communication with a compressible media such that the transmission apparatus may generate pressure impulses in the media in the tubular system. The system also comprises a reception apparatus that detects the pressure impulses in the media at the reception node in or associated with the tubular system.
The transmission apparatus may generate either positive pressure impulses wherein at least one incremental pressure increase followed by at least one corresponding incremental pressure decrease is propagated through the media, or negative pressure impulses wherein at least one incremental pressure decrease followed by at least one corresponding incremental pressure increase isPericyma scandulata

Pericyma scandulata is a moth of the  family Erebidae.

Distribution
It is found in Uganda, Zimbabwe and South Africa.

References

Category:Ophiusina
Category:Insects of Uganda
Category:Fauna of Zimbabwe
Category:Moths of Africa