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This paper describes a procedure for the automatic detection of sluggish control loops obtained from conservatively tuned controllers. A measure, the Idle index, of the sluggishness of the control loop is defined. The Idle index describes the relation between times of positive and negative correlation between the control and measurement signal increments. It can be determined with a very small amo
DN-debattartikel som bygger på några av resultaten från Sjuk-Sverige: Försäkringskassan, rehabilitering och utslagningen från arbetsmarknaden (Hetzler; Melén; Bjerstedt).
Using a simulated model of a house consisting of two adjacent rooms, the temperature of the two rooms is controlled with a PI controller and a decoupled PI controller. This is compared to MPC control. In the simulation example here, both the MPC controller and the decoupled PI controller decreased the interaction between the temperature dynamics of the two rooms, as compared to an independent PI c
Tests have been performed on an analogue two-dimensional granular material in a special laboratory apparatus that allows the application of general stress or strain conditions. Digital image correlation of pairs of consecutive photographs taken during the tests has enabled fields of displacement and hence strain to be determined. Thus direct observation of internal displacements and strains has be
A virtual haptic-audio drawing program prototype designed for visually impaired children, has been gradually developed in a design-evaluation loop involving users in five stages. Four qualitative evaluations focused on recognizing drawn shapes and creati
Vår frågeställning i denna artikel är: Hur talar man om etniska grupper så att de andra samtalspartnerna inte uppfattar det sagda som stereotypi och tecken på dålig bildning? Med utgångspunkt i ett svenskt och två tjeckiska material visar vi med en lång rad exempel hur 'vi'&endash;'dom' kontrasten formuleras av talaren och förhandlas vidare med övriga samtalspartner. I samtalsexemplen illustre
After the oil crises in the 1970s, the local government in the town of Enköping in Sweden was cautioned by the local Swedish military regiment to shift towards domestic energy supplies rather than imported fossil fuels. During the 1980s the local energy companies investigated opportunities in bioenergy. In the 1990s the local energy companies and local government developed an innovative bioenergy
