A paleontologist returns to her lab from a summer dig and sets up a study comparing tooth length in two dinosaur species. She and her team work meticulously to avoid biasing their results. They remain ...

In a test of equivalence, a treatment mean and a reference mean are compared to each other. Equivalence is taken to be the alternative hypothesis, and the null hypothesis is nonequivalence. The model ...

Standing on the Moon in 1971, Apollo 15 astronaut Dave Scott held his hands out at shoulder height, a hammer in one hand and a feather in the other. And as the world looked on via live television, he ...

Compared to metals such as aluminum and steel, the number of stiffness and strength properties associated with polymer matrix composites (PMCs) is extensive. For metals, these mechanical properties ...

One of the most counter-intuitive notions in physics is that all objects fall at the same rate, regardless of mass, aka the equivalence principle. This was memorably illustrated in 1971 by NASA Apollo ...

Visit NAP.edu/10766 to get more information about this book, to buy it in print, or to download it as a free PDF. Descriptions of student or adult competency in a particular subject area, usually ...

(The Conversation is an independent and nonprofit source of news, analysis and commentary from academic experts.) Evangeline Rose, University of Maryland, Baltimore County; Kevin E. Omland, University ...