A portable fitness device includes a global positioning system receiver that receives GPS signals, a wireless wide-area network transmitter supporting communication over-the-air to a wireless communication network, and a processing unit coupled to the GPS receiver and the wireless wide-area network transmitter. Methods for producing a maize plant that comprise crossing inbred maize line PHCND with another maize plant. external fields of minimal intensity. In one embodiment, the second via is positioned proximate the first via to enable electromagnetic coupling between the first and second vias.