We analyze the effect of finite rate feedback on CDMA (code-division multiple access) signature optimization and MIMO (multi-input-multi-output) beamforming vector selection. In CDMA signature optimization, for a particular user, the receiver selects a signature vector from a codebook to best avoid interference from other users, and then feeds the corresponding index back to the specified user....

We present ERM-Tutor, a constraint-based tutor that teaches logical database design (i.e. mapping conceptual to logical database schemas). Students practice this procedural task in ERM-Tutor by solving each step and receiving feedback on their solutions. We also present a new feature added to the system, which enables students to ask free-form questions. A preliminary evaluation carried out on ...

Due to the continuing reduction of funds, management must find ways to ensure quality operation of tertiary education institutions at an optimal cost. This objective can only be achieved by quality control of the educational process. Its requirements are part of the ISO 9001 standard. Among them is the mapping of educational processes for quality management system. A practical manual was create...

This essay makes three points. (1) From the failure of perceptual learning to transfer when stimulus parameters are changed, it cannot necessarily be concluded that the site of learning is distal: rather, the learning may be central and the specificity may lie in what is learnt. (2) Mere exposure to a stimulus may not be sufficient for learning: even in the absence of explicit feedback, other s...

This article addresses the central impediment to the wide-spread exploration of the potential of Local Composition Control (LCC) in Solid Freeform Fabrication (SFF), and presents a Feature-Based Design (FBD) approach for modeling complex components with LCC. The approach will allow the designer to simultaneously edit geometry and composition until a satisfactory result is attained. The concise ...

This paper starts with the description of the modeling process as a dialog, and describes the associated formal functions, including the feedback supporting the growing mutual understanding. The dialog has a procedural and an informational aspect. For this latter a controlled grammar is used, that has a user friendly and a system friendly side. These sides are related via an elementary syntacti...

Conventional programming methods require the user to learn the syntax and semantics of a proprietary robot programming language and to debug the program by iteratively editing, compiling, and executing the program. If the task to be performed by the robot requires sensor feedback (e.g., force or touch), the programmer must speculate on the proper sensor values and guardedly wait by the “emergen...

A recent discussion involves the elaboration on possible design principles for sequences of tasks. This paper builds on three principles, as described by Bokhove and Drijvers (2012a). A model with ingredients of crises, feedback and fading of sequences with near-similar tasks can be used to address both procedural fluency and conceptual understanding in an online environment. Apart from theoret...