Many poor interface features are the result of carelessness, ignorance or neglect in the development process. For these features, methods such as user involvement in iterative design with prototyping, the use of checklists and guidelines, and even formal evaluation can be of great help. However,…
In this paper we describe a fast procedure for retraining a feedforward network, previously trained by error backpropagation, following a small change in the training data. This technique would permit fine calibration of individual neural network based control systems in a mass-production environment. We also…
The idea of asymmetric windowing as a way of reducing time delay in spectral analysis is explored. Traditional windows are analyzed in relation to time delay. Then, some asymmetric windows are introduced and a comparative analysis with traditional windows is made. It is shown that…
Today, user needs are recognized to be important in designing interactive computer systems, but as recently as 1980, they received little emphasis. In most major systems development companies, the basic organizational structures and development processes were defined in an earlier era, when the dialogue between…
Autonet is a switch-based local area network using 100 Mbit/sfull-duplex point-to-point links. Crossbar switches are interconnected to other switches and to host controllers in an arbitrary pattern. Switch hardware uses the destination address in each packet to determine the proper outgoing link for the next…
An experiment is described comparing three devices (a mouse, a trackball, and a stylus with tablet) in the performance of pointing and dragging tasks. During pointing, movement times were shorter and error rates were lower than during dragging. It is shown that Fitts' law can…
Learning research, as one of its central goals, tries to measure, model, and understand how learning-problem properties effect average-case learning performance. For example, we would like to quantify the value of constructive induction, noise filtering, and background knowledge. This paper works towards this goal by…
he effect of local pressure gradients and of a local flattening of the pressure profile W- 0) around the resonant surface of a tearing mode is investigated in toroidal geometry. It is shown that the stability index A, calculated from the ideal outer region, is…
An important feature of radial basis function neural networks is the existence of a fast, linear learning algorithm in a network capable of representing complex non-linear mappings. Satisfactory generalization in these networks requires that the network mapping be sufficiently smooth. We show that a modification…
Many of the issues that confront designers of interactive computer systems also appear in natural language evolution. Natural languages and human-computer interfaces share as their primary mission the support of extended “dialogues” between responsive entities. Because in each case one participant is a human being,…
The need to integrate several versions of a program into a common one arises frequently, but it is a tedious and time consuming task to merge programs by hand. The program-integration algorithm proposed by Horwitz, Prins, and Reps provides a way to create a semantics-based…
As streaming audio-video technology becomes widespread, there is a dramatic increase in the amount of multimedia content available on the net. Users face a new challenge: How to examine large amounts of multimedia content quickly. One technique that can enable quick overview of multimedia is…
