A projector includes an illumination optical system, an image formation element that spatially modulates light from the illumination optical system, and a projection lens that projects the spatially modulated light. The anti-inflammatory analgesic for external use is excellent not only in skin permeability but also in penetratability and diffusivity into tissues present in portions deeper than the skin, can act directly on the muscles or joint tissues with inflammation or pain, and is a little irritant to the skin. Optimal itineraries are generated by generating sets of optimal parameters that include paths for which connectivity measures satisfy predefined criteria and hops that indicate positions associated with connectivity changes. The dopant can convert the crystal structure of the hafnium oxide or zirconium oxide to a tetragonal structure and increase the dielectric constant of the metal oxide. The weight preferably includes a lengthwise through hole for receiving the flexible line. When the first rotating member and the second rotating member are rotated towards the base member, the connector plug is inserted into the connector socket.