An alcohol detection system for a vehicle has an alcohol sensor, for which alcohol measurement preparation processing such as heating the alcohol sensor to a predetermined temperature is performed, so that the alcohol sensor operates under the stable operation state. Seed from one generation in a plant advancement experiment is individually sampled by removal and collection of tissue from the seed. Stack signatures can be associated with program bugs, and stack signatures collected from other failure instances, at other times or on other machines, can be conveniently compared for recognizing particular types of failures, without access to source code and without detailed study of memory dumps. Intravascular catheter delivery of the fibrinolytic composition directly into or in the immediate vicinity of the thrombus is disclosed to minimize the systemic degradation of fibrin while retaining the maximum plasmin activity against the thrombus.