A technique for analyzing network packets includes receiving, by a network processor, a network packet having a packet header including address and control information. The mass flow entering and leaving the cylinder is modeled, allowing parameters such as the mass of air per cylinder and residual exhaust gas to be computed, and thereafter used to generate engine control commands related to fuel injection, spark advance, and so forth. The application can be as a liquid for bathing, rinsing or gargling, or lather generated by brushing the teeth for a sufficient time. Light which passes through or around the sample is captured in the sphere, so that it is not reflected back into the imaging system. The key transmission unit transmits in advance, to the terminal, one key to decrypt one of the encrypted data generated by the data encryption unit. The compounds are inhibitors of nitric oxide synthase and are thereby particularly useful in the treatment or prophylaxis of inflammatory disease and pain.