Efficient user interface in electronic mail systems

Traditionally, research in computer sciences has had its primary focus on developing models and systems to attain superior design and implementation capabilities. However, with new software becoming available at an ever increasing rate, there is a parallel increase in our need to better understand the mechanics of computer-user interfaces, whether they are of a motor, cognitive, or perceptual kin

Analytical models for predicting performance in human-computer interaction

Human Computer Interaction (HCI) is an integral part of computer programming. Key issues in HCI design include specification of system performance expectations, analysis of performance predictions and evaluation of performance after implementation. Keystroke models provide reliable predictions of alternative system designs but require complete implementation or specification of the system. Simulation models, on the other hand, have promise as diagnostic tools in early stages of system design

Problem structuring in architectural design

The purpose of our research is to describe in operational terms the process of problem structuring while solving spatial problems in architectural design. The designer's behavior is described in terms of Problem Structuring, when problem parameters are established or transformed, and Problem Solving, when these parameters are satisfied in a design solution. As opposed to problem soloving, structuring of problems is a little studied but crucial aspect of complex tasks such as design. Our work is based on observations derived from verbal protocol studies.To consider various levels of skill, our subjects range from professional architects to novice designers. Subjects are given space planning problems which require them to develop solutions in accordance with individually established constraints and criteria, the majority of which are not explicitly stated in the problem description.Based on the results of the protocol analysis, a framework is developed, which explains how information processing characteristics, problem structure and different levels of expertise interact to influence the designer's behavior

Heuristic generation of layouts (HeGel) based on a paradigm for problem structuring

This report describes a computer based system called HeGeL which is developed to_calibrate and verify a model of problem structuring in the design process. Implemented as a production system, HeGeL simulates the design behaviors of humans observed during protocol experiments. This report discusses the representations used, flow of actions and the computing environment of HeGeL as well as the validity of the proposed design paradigm and the adequacy of methods used