Abstract: A Multi-Link access point apparatus uses multiple combinations of link offset information and information of the number of links to notify, by using only a small amount of information, whether a frame is buffered that is addressed to a Multi-Link station apparatus operating in a Power Management mode and information of a link, the use of which is indicated or recommended.

Abstract: It is an object, with regard to a configuration for forming a macromolecular layer on a surface of a base material of an artificial joint component, to achieve a size reduction, to accurately control ultraviolet irradiation intensity, to form a macromolecular layer having a uniform thickness, to suppress the influence of ultraviolet light on equipment and workers, and to make the occurrence of a malfunction unlikely. A film-producing device body forms a macromolecular layer in an inner surface of a base material of an artificial joint component, by means of photograft polymerization. The film-producing device body includes a plurality of ultraviolet LED elements and a work holder. On the work holder, solution containing macromolecular monomers is in contact with the inner surface of the base material. The ultraviolet LED elements emit ultraviolet light to a wider area than an area that each of the ultraviolet LED elements individually irradiates.