A system and method for executing multiple graphical programs, in which program output from each graphical program is displayed in a single graphical user interface. The grinding chamber has an inlet for the grinding material and is provided with an agitator which can be driven in rotation and has agitating means for moving the grinding bodies and the grinding material. The reduced size header improves the bus throughput efficiency of the computer system and reduces power requirements for the computer system. The central processing unit and coprocessor are coupled to the compute engine’s associated cache memory. The dielectric properties of the specimen affect the electric field, which in turn induces a magnetic field and generates currents in the coils.