The invention relates to a device for the elimination of gas or paraffin hydrate deposits that form in well drilling equipment or hydrocarbon production and transportation equipment through the use of a reactant that is likely to decompose at high temperatures. A processor that stores first data, which is related to a write request from a host computer, in a cache memory, specifies a first storage device for storing data before update, which is data obtained before updating the first data, and transfers the first data to the specified first storage device. Authentication information can include IP address information, geographic information, device type, browser type, email addresses, andor referral information, for example. The second connection state drives, the second signal lines in parallel so that voltages are applied, outputs, along the first signal lines, a linear sum of electric charges stored in the capacitors corresponding to that respective one of the first signal lines, and estimates, a capacitance of the capacitors formed along that first signal line. By low dose therapy is preferably meant less than 0.