A bone fusion device provides stability to bones during a bone fusion period. The charging apparatus that discontinues the charging in a preset expiration time period of a timer has a variable controller for controlling the preset expiration time period of a timer in response to an interrupted time if the charging operation that is interrupted before reaching the preset expiration time of a timer is started again. The pushers may be undergoing lateral acceleration at the time initial contact is made with the articles. The anode includes a first electrically conductive layer and a fluorescent layer formed on an inner surface of the first electrically conductive layer. The system authenticates a client to an authenticating server; generates an authorization token with the authenticating server and the client; and authorizes services for the client using the generated authorization token.