Vibration frequency response function can be calculated, thereby characterizing the system. This technique is used in the field of experimental modal analysis to determine the vibration characteristics of a structure. The simple mass–spring–damper model is the foundation of vibration analysis, but what about more complex systems? The mass–spring–damper model described above is called a single degree of freedom (SDOF) model since the mass is assumed to only move up and down. In more complex systems, the system must be discretized into more masses that move in more than one direction, adding degrees of freedom. The major concepts of multiple degrees of
What Can Be Done at This Point Be Done at This Point". It's also the sixth track on that album. What Can Be Done at This Point What Can Be Done at This Point is the third album by Mexican alternative rock singer, Elan. The album was released in early May 2007. The title track, "What Can Be Done at This Point", is a tribute to the deceased crew of the Space Shuttle Challenger. The track contains audio of the transmission between Challenger and mission control of the day of the tragedy. The track number 6, "Don't Want You in", was the lead single off the album.