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Show me the direction – how accurate does it have to be?

One factor which can be expected to influence performance in applications where the user is expected to point a device in some direction to obtain information is the angle interval in which the user gets feedback. The present study was performed in order to get a better understanding of the influence of this angle interval on navigation performance. Results indicate that users are able to handle q

On Batch recipe Structures Using High-Level Grafchart

Batch processes are very common and important in e.g. the chemical industries. The international standard ISA88.01 defines the terminology, the functionality and the models for batch control systems. The production specification of how to produce a batch, is called a recipe. This paper shows how high-Level Grafchart, a Grafcet and High-Level Petri net based programming language can be used to repr

Scattering from a frequency selective surface supported by a bianisotropic substrate

In this paper a method for the analysis of a frequency selective surface (FSS) supported by a bianisotropic substrate is presented. The frequency selective structure is a thin metallic pattern — the actual FSS — on a plane supporting substrate. Integral representations of the fields in combination with the method of moments carried out in the spatial Fourier domain are shown to be a fruitful way of

Evaluation and Documentation through Participatory Scriptwriting

I have documented creativity workshops and collected ethnographic data for evaluation purpose through a method I call participatory scriptwriting. The main purpose with the method has been to reach an understanding of how the participants perceive their reality through synthesizing their impressions of the workshops in a short manuscript. When the workshop has ended they have acted according to th