In Ramseur, North Carolina, a reincarnation of a modernist dog-trot house. The original was designed by Stephen Atkinson more than a decade ago and became a darling of design magazines. This one was built by Terrie Moffitt and Avshalom Caspi, psychology professors at Duke University, who saw the house on the cover of a book, and wrote to Mr. Atkinson. He made a bargain with them: they could have the plans free, but if they made substantial changes, he would charge them.