MOTIVATION We extend the standard 'Sequence Logo' method of Schneider and Stevens (Nucleic Acids Res., 18, 6097-6100, 1990) to incorporate prior frequencies on the bases, allow for gaps in the alignments, and indicate the mutual information of base-paired regions in RNA. RESULTS Given an alignment of RNA sequences with the base pairings indicated, the program will calculate the information at...

The iCricket is a new internet-enabled embedded control board with built-in motor and sensor interface circuits. It is designed for use by pre-college students and other programming novices. It includes a Logo virtual machine with extensions that allow networked iCrickets communicate with one another, retrieving sensor values and remotely running each other’s Logo procedures. The underlying imp...