A liquid delivering device including: a cavity unit defining pressure chambers; and a piezoelectric actuator unit superposed on the cavity unit, and having active portions opposed to the respective pressure chambers and selectively deformable upon application of a drive voltage thereto so as to deliver a liquid from the corresponding pressure chambers to the exterior. Next, in place of the ceramic plate, a blood collection tube containing a blood sample which has been stabilized at a predetermined temperature by a water bath has the near infrared light applied thereto. Automatic Message Accounting records also are accumulated and uploaded to a another relational database. The position of the catheter near the junction is determined based on a signal from a device associated with the catheter within the structure. A method of embodiments of the invention includes receiving a request to open a directory of a union file system, processing directory entries of the directory for whiteouts and duplicates, copying the processed directory entries to disk storage, and flagging the copied entries from a lower level file system as fall-through entries.