Are our ideas about

Are our ideas about Dst correct?

The idea of two separate storm time ring currents, a symmetric and an asymmetric one has accepted since the 1960s. The existence of a symmetric equatorial ring current was concluded from Dst. However, the asymmetric development of the low-latitude geomagnetic disturbance ®eld during storms lead to the assumption of the real existence of an asymmetric ring current. I think it is time to inquire ...

How accurate are our assumptions about our students' background knowledge?

Teachers establish prerequisites that students must meet before they are permitted to enter their courses. It is expected that having these prerequisites will provide students with the knowledge and skills they will need to successfully learn the course content. Also, the material that the students are expected to have previously learned need not be included in a course. We wanted to determine ...

Evolving Ideas about Cyclins

instance, is associated primarily with activation of S James M. Roberts Division of Basic Sciences phase whereas CDK1 primarily with mitosis. However, assays using defined peptides reveal only subtle differFred Hutchinson Cancer Research Center and Howard Hughes Medical Institute ences in substrate preference between CDK1 and CDK2 (Holmes and Solomon, 1996), and there is no compelling 1100 Fair...

Some Ideas About Colour

Emerging Ideas About Categories

The study of human categorization is contentious because it matters. How we understand the processes that give rise to categories is at the very core of how we understand human cognition. Over the past several decades, there has been growing concern that the assumptions that define and distinguish competing theories may notbe quite right. These assumptions are based on the traditional metaphor ...