Personality, behavior and competency assessment data is obtained for a sales person, particularly via a computer-implemented interface. The tubular shaped solar cell comprises a back-electrode, a semiconductor junction circumferentially disposed on the back-electrode and a transparent conductive layer disposed on the semiconductor junction. A split intrinsic safety barrier comprises current limiters electrically connected between the terminal and the control circuit and a diode safety barrier electrically connected between the control circuit and the active element. , first and second halves by means of a slit formed along the axis of the tip end member, and the first half having the predetermined rigidity is movable around a connection between itself and the tip body. A conductive grit or steel shot fills a portion of the interior volume of the enclosure around the coil of conductive wire. The testing method of a chip includes the steps of: receiving a testing signal from a low speed bus; then transmitting the testing signal according to a transmission control signal; then receiving the testing signal according to a receiving control signal; and comparing the transmitted testing signal and the received testing signal to identify the IO functions of the chip.