Abstract: A battery includes: an electrode layer; a counter electrode layer, which is a counter electrode for the electrode layer; a solid electrolyte layer between the electrode layer and the counter electrode layer; and an electrode current collector electrically coupled to the electrode layer. The solid electrolyte layer includes a first region containing a first solid electrolyte material and a second region containing a second solid electrolyte material. The first region is positioned within a region where the electrode layer and the counter electrode layer face each other. Moreover, a second density, which is of the second solid electrolyte material in the second region, is higher than a first density, which is of the first solid electrolyte material in the first region.

Abstract: A bridge communication system connects a plurality of bridge apparatuses, each connected to a local area network, through a backbone network. The present system performs a node address setting in the bridge apparatuses to add an address of the source node of the backbone network to a data frame. A learning table is provided in the respective bridge apparatuses for storing at least the source address corresponding to the terminal address, the port numbers of each bridge apparatus, and the address of the node of the backbone network. The system searches the learning table using a destination address designating a destination terminal in the data frame transmitted to the respective bridge apparatuses adds an address of a backbone node, obtained by the searching, to the data frame to be transmitted to the backbone network.