Abstract: Provided is a heterocyclic compound that can have an antagonistic action on an NMD A receptor containing the NR2B subunit and that is expected to be useful as a prophylactic or therapeutic agent for depression, bipolar disorder, migraine, pain, peripheral symptoms of dementia and the like. A compound represented by the formula (I), wherein each symbol is as defined in the DESCRIPTION, or a salt thereof.

Abstract: As it is often difficult for users of a keyboard to adequately identify and select the correct keys in a keyboard where the light is inadequate, it is desirable to provide a keyboard capable that allows a user to better see keys of the keyboard even in environments where there is not sufficient light to see the keys (e.g., in an airplane). A keyboard of the present invention comprises a substrate, a membrane, an elastic member, a cover sheet, a keytop, and light-emitting means for emitting light from the bottom of the substrate to the keytop. The keytop is illuminated and a legend on a key surface can be seen, so that the chance of incorrect key stroke is reduced.

Abstract: As it is often difficult for users of a keyboard to adequately identify and select the correct keys in a keyboard where the light is inadequate, it is desirable to provide a keyboard capable that allows a user to better see keys of the keyboard even in environments where there is not sufficient light to see the keys (e.g., in an airplane). A keyboard of the present invention comprises a substrate, a membrane, an elastic member, a cover sheet, a keytop, and light-emitting means for emitting light from the bottom of the substrate to the keytop. The keytop is illuminated and a legend on a key surface can be seen, so that the chance of incorrect key stroke is reduced.

Abstract: A new electrode is joined to a consumed electrode of the electric furnace according to a method comprising the steps of lifting and transporting the new electrode suspended from a joining apparatus by a crane, aligning both electrodes by throwing a laser beam from a projector disposed to the crane on a positioning marker disposed on a deck plate provided in the vicinity of the electric furnace, screwing a screw thread of the new electrode into a threaded hole of the consumed electrode by actuating an electric motor disposed in the joining apparatus, and tightening both electrodes at desired tightening torque by operating the motor in a stalled state with a small electric current of low frequency.

Abstract: A new electrode is joined to a consumed electrode of the electric furnace according to a method comprising the steps of lifting and transporting the new electrode suspended from a joining apparatus by a crane, aligning both electrodes by throwing a laser beam from a projector disposed to the crane on a positioning marker disposed on a deck plate provided in the vicinity of the electric furnace, screwing a screw thread of the new electrode into a threaded hole of the consumed electrode by actuating an electric motor disposed in the joining apparatus, and tightening both electrodes at desired tightening torque by operating the motor in a stalled state with a small electric current of low frequency.