In this paper we describe a methodology for approaching the problem of migrating a course from the classroom to the Web. We propose that there are four main learning modes in the classroom: passive presentation, high level interactive demonstrations, student led practical exercises and reference to written source notes, and that each of these modes can be successfully moved to a Web based cours...

This paper proves several theorems involving how special points of a triangle trace circles as one of the vertices of the triangle is moved around the circumcircle. We investigate the larger issue of why this happens using constant distance ratios, and finally, we prove some theorems about strophoids and use a “lighthouse” construction to show that another special point of a triangle traces a s...

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In addition to the time-dependence of the msd, also the self-part of the van Hove correlation function Gs(r, t) is an interesting measure to characterize anomalous diffusion. Here, Gs(r, t) is the probability that a particle has moved within a time span t a distance r. The Gs(r, t) for a proton on a surface (figure S1) shows that the surface displacement exhibits long-tailed behavior with respe...

We measured the movement and orientation of sea urchins at 2 sites in each of 4 habitats on urchin barrens in the northern Gulf of St. Lawrence, eastern Canada. We tagged the urchins measuring 25 to 70 mm in test diameter using a non-invasive technique involving a knot of fine monofilament thread tied around one spine. Smaller urchins (<25 mm) were tagged by tightening a loop around the test. D...

Introduction Boundaries between classroom-based, blended, and distance education are blurring. Contemporary classroom-based courses typically have a course website. Instructors’ editions of textbooks include PowerPoint lectures that can be either presented in a classroom or licensed for distance distribution. Students’ editions include etutorials and quizzes for independent learning. Classroom ...