A serial data transceiver is presented which includes elements which facilitate testing using only the serial data transfer terminals of the transceiver. In one embodiment, a HEMT can include a III-N based core-shell structure including a core member, a shell member surrounding a length of the core member and a two-dimensional electron gas at the interface therebetween. The phases of frequency domain symbols are rotated prior to application of the IFFT so that cyclic prefix addition may be implemented as cyclic postfix addition. Still further provided by the invention are methods for producing soybean plants by crossing the soybean variety A1007964 with itself or another soybean variety and plants produced by such methods. In this way, an existing telephony infrastructure in a hospital can be re-used to deliver healthcare information services to the point of care. The method can produce a minimal list of sets of concurrent events that will occur according to a universal master schedule in a form suitable for processing by an automatic validation system.