Al Trujillo is a Distinguished Teaching Professor of Earth Sciences at Palomar College in San Marcos, California. He has worked with his co-author, Hal Thurman, on Essentials of Oceanography (Trujillo and Thurman, Pearson Education) since the 6th edition, and they have also co-authored Introductory Oceanography, which is now in its 10th edition.
Here Trujillo discusses the value and functionality of embedding QR code technology into textbooks: