Abstract: In a method for controlling a sodium-sulfur battery, a time of correcting or resetting a depth of discharge of the sodium-sulfur battery is determined within a predetermined period based on weather information, and the depth of discharge of the sodium-sulfur battery is corrected or reset in the determined time. According to this sodium-sulfur battery control method, the depth of discharge of the sodium-sulfur battery can be accurately managed in a small-scale interconnected system.

Abstract: A fabricating method of a piezoelectric/electrostrictive device including a driving portion having thin plates facing each other and a film-like piezoelectric/electrostrictive element formed on the surface of at least one thin plate of the thin plates, and a fixing portion and a movable portion in rectangular solid form. The thin plates are spanned so that the side faces of the movable portion and the fixing portion are continuous. The fabricating method includes steps of preparing a laminated body of green sheets comprising at least one green sheet to constitute the thin plate, and at least one green sheet with at least one hole formed thereon, sintering a green-sheet laminated body, and forming a piezoelectric/electrostrictive element on an outer surface of the thin plates of the sintered body obtained.