Methods and apparatuses are provided for facilitating determination of a state of a receiver buffer. The system provides a prosthesis having a proximal or distal end component such as a trochanter or condylar head, forming one component of a prosthetic joint, a shaft for assembly with a distal or proximal end component and a stem for engagement in a resected bone. The network is then monitored for the occurrence of those phenomena. The mobile device further includes a processor that determines a difference between the uncontrolled environment where the image data was captured and a controlled environment, and adjusts the image data based on the difference. The cables pass over ends of the sliding bars between the first sidewall and the second sidewall. The transmitting apparatus includes an encryptor that outputs second encrypted data obtained by generating data including a predetermined number of keys, and encrypting the data in accordance with a second encryption technique, a transmitter that transmits the second data from the encryptor to the receiving apparatus.