Stimulated emissions due to nuclear quadropole resonance are detected utilizing a terminated balanced transmission line and a directional coupler for the detection of explosives, contraband, narcotics and the like that exist between the transmission lines, in which a swept frequency continuous wave generator is utilized to scan between 100 KHz and 10 MHz. The convertible seating unit comprises a seat having an upper surface, a front edge and a rear edge. For cylindrical geometrics, isolation can be enhanced by having the rotation, or change in direction from one end of the coil to the other, be 2n\u03c0, where n is an integer. A clock coupling circuit connected between each of the clock wave inputs and each of the clock wave outputs couples clock waves from the clock wave output of a first node to a clock wave input of a second node. The telescoping relationship is defined by an overlying leg and an underlying leg, the overlying leg having has two spaced flanges, each wrapping partly around the underlying leg. It further distinguishes itself by being seedless or virtually seedless.