A thermal interface unit includes a pedestal, a first contact surface below the pedestal to interface with a first die and a flat spring to enable the first contact surface to adapt to a variable height of a first die of a multi-chip package. The second portion is removably-couplable to the first portion such that it can be removed from, and coupled to, the first portion while the device is being worn. The invention further relates to a stacked broadband antenna system wherein additional coneless elements, as well as other types of antennas or devices, may be stacked collinearly on, or disposed coaxially to, the cylindrical antenna structure, and fed, powered or operated via the plurality of feed lines, cables, piping or other structures. A controller initiates closing the first solid-state switch and the second solid-state switch prior to changing state of the first mechanical switch and the second mechanical switch. The nucleic acid molecules can be used for directed or localized delivery to tumors or other cells associated with disease resulting in production of a chromophore product that can be used for diagnosis and therapy, including of tumors and metastases. The predriver circuit includes a current mirror circuit, which has a pair of transistors that are connected to a predriver power supply voltage; a level shifter circuit, which is connected to a first transistor via a self-bias circuit; and a discharge transistor, which is connected to a second transistor.