A multiplexer circuit has at least two input channels and an output channel. At least one embodiment includes a computer fluid dynamics component configured to model a data center, the data center including at least one component and a monitor component configured to receive data associated with the modeled data center and translate the received data for 3-dimensional modeling. Another embodiment of the current regulating device regulates and limits the average current delivered to the electrolysis chambers by adjusting the pulse widths, according to the current demanded during each conduction pulse. The method receives networking data regarding the communication channel from the second device. Such a configuration makes it possible to distribute the load placed on the stopper during operation, thereby preventing an operating member or the stopper from breaking. The structure of the enclosure may be conductive and may include a metamaterial portion, an electromagnetically absorbing portion, or a wall extending in the interior region.