This invention discloses a new technology related to cellulose fiber reinforced cement composite materials using the loaded cellulose fibers. To be able to test a microcontroller, using the boundary scan test procedure, even when the JTAG interface is not accessible by a separate hardware adaptor of a JTAG tester, it is proposed that the JTAG interface of the microprocessor be activated by a test routine executable on the microprocessor. The sound and vibrations are transmitted through speakers, transducers, or a combination thereof which are connected to the chair or similar apparatus. Another aspect of the present invention is a mixture for the formation of an electrical conductor on or in a substrate.