Aircraft engines and methods for operating such aircraft engines during transient conditions are described. The process involves providing to an electrochemical cell a suspension in a 1. The dam portion is formed such that a substantially constant distance separates the inner peripheral face from the dam portion. In addition, a proportion of an IP packet to a GTP-U packet increases, thereby improving transmission efficiency. These compounds are antagonists of the adenosine A2a receptor and useful as medicaments, in particular for the treatment of Parkinson’s disease.