A method and apparatus to detect a center of a visual axis that can adapt to a varying pupil size. Each monitoring agent collects data regarding the resources a particular client computer makes available to the grid and transmits the data to the grid server when the client computer requests a grid task. In another embodiment, the bottle holder includes an activation switch triggered by a bottle position change. The computer then transmits the data packets received from the electronic device to the network at a higher speed. Data fields having a size of 128 bits, for example, can thus be transferred on a 64-bit data path structure without any negative effect on the system performance and without the necessity of increasing the clock frequency; this facilitates the integration of the system on a chip.