A sample chamber array is provided. The fusing roller has a main member that has hollow portions therein and is made of an opaque material and an infrared absorbent layer that is formed on the inner surface of the main member. Alternative embodiments of the bridge may be used either for performing surgery in one procedure on a number of vertebrae of the spine, or as a reference frame for performing surgery at different locations along the spine, while providing an alignment reference along major lengths or along all of the spine. As the fluid displacer is injected into the top portion of the reservoir, it forms a gas zone, which displaces oil and water downward towards the horizontal producer well. The graphic information is stored in a second storage which is accessible to the processor. The system also comprises circuitry for querying the information communicated by the at least one monitoring circuit to the database to identify an irregularity in the network traffic.