Abstract: A state estimation device includes an information acquisition unit acquiring at least one of (i) electrode acquisition information indicating an electromagnetic time series that is a time series of an electromagnetic quantity that is an electromagnetic force, field, or energy applied to an electrode from which a signal indicating a state of a heart of an estimation target is acquirable or (ii) environment information that is information on a time series of an environmental quantity that is an amount related to one or both of a state of motion of the estimation target and an environment in which the estimation target is present; and an estimation unit using at least one of the electrode acquisition information or the environment information to determine whether an electrode event, which is an abnormality in acquisition of a signal indicating the state of the heart of the estimation target by the electrode, has occurred.

Abstract: A constant feed supplying device having a desired number of flow paths for supplying a feed to a desired number of cages. A discharge port is operatively connected to a feed hopper for transferring the feed introduced into the flow path towards a discharge port and continuously dropping the feed through the discharge port. The discharge port includes a rotary disk mounted for rotation in a sliding contact with the bottom of the flow path. The rotary disk includes a number of through holes provided at suitable intervals so that the through holes may be sequentially brought into position over the discharge port during rotation of the disk. Each flow path is provided with a rotary shaft positioned horizontally within the flow path and projecting out of the flow path so as to be operable by a suitable rotary mechanism.