Steven Frank

This open access Brief introduces the basic principles of control theory in a concise self-study guide. It complements the classic texts by emphasizing the simple conceptual unity of the subject. A novice can quickly see how and why the different parts fit together. The concepts build slowly and naturally one after another, until the reader soon has a view of the whole. Each concept is illustrated by detailed examples and graphics. The full software...

Five seventh-graders concerned about climate change work with a retired lawyer and an activist grandmother to build an international movement to amend the United States Constitution, protecting humanity's right to live on a planet free of pollution and warming.

Charlie isn't looking forward to sixth grade. If he starts sixth grade, chances are he'll finish it. And when he does, he'll grow older than the brother he recently lost. Armstrong isn't looking forward to sixth grade, either. When his parents sign him up for Opportunity Busing to a white school in the Hollywood Hills, all he wants to know is "What time in the morning will my alarm clock have the opportunity to ring?" When these two land at the same...

Steven A. Frank is Professor of Evolutionary Biology at the University of California, Irvine, and the author of Foundations of Social Evolution (Princeton). From HIV to influenza, the battle between infectious agents and the immune system is at the heart of disease. Knowledge of how and why parasites vary to escape recognition by the immune system is central to vaccine design, the control of epidemics, and our fundamental understanding of parasite...

"During the pilot year of a Los Angeles school system integration program, two sixth grade boys, one black, one white, become best friends as they learn to cope with everything from first crushes and playground politics to the loss of loved ones and racial prejudice in the 1970s"--

Petra, a stone city of temples and tombs carved deep into stark cliffs in Jordan, was the center of life two thousand years ago for a people called the Nabateans. Archaeologists excavate evidence of a highly sophisticated society and discover answers to questions about Nabatean beliefs, customs, and destinies.