Measurement Centred Evaluation in Adaptive Web-Based Learning Systems Based on CBR Approach

In a preferred embodiment, a novel magnetic recording disk module is disclosed, one including a "core" of floppy disks laminated together in abutment, and, on one or both sides of this core, an array of spaced floppy disks, with only the outermost disk adapted for transducing,-especially by a rigid "floppy" type transducer.