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The time evolution of incipient necks is studied numerically for planar and axisymmetric bars subject to high-rate extension. The material is taken to be elastic-plastic and fully non-linear dynamic effects are accounted for. Two main types of growth of necks are observed; stable neck-development that results in fully developed necks and unstable neck-development that leads to weakly developed nec
This paper describes a method for automatically initializing a self-tuning controller. The procedure can be used for systems that are adequately described by models of at most third-order with time delay. For this class of systems it gives a self-tuner that can be initialized simply by pushing a button.
In this paper, we describe an audio-haptic drawing application prototype that has recently been tested by five pupils who are 8-13 years. The application has been used by pupils, assistants and teachers to access graphics and create graphics that are accessible for pupils with severe visual impairment or blindness. We have observed a spread in the actual use of the system that seems to depend, for
Projektet NOA finansierades av Europeiska socialfonden (Växtkraft, Mål 3) och vände sig till långtidssjukskrivna vid Försäkringskassan i Malmö mellan åren 2005-2007. Utvärderingen av projektet har en formativ och en summativ del och bygger på intervjuer med kursdeltagare, projektledare, arbetspsykologer och outplacementkonsulter. Deltagarna beskriv utbytet av projektet på olika sätt. En del betona
Purpose To explore demand related information sharing in a multi-tier supply chain and propose contingency factors that impact benefits of information sharing across three or more tiers. Design/methodology/approach Through an in-depth case study a range of methods are used to collect data from companies representing three different tiers, including focal company, 1st tier suppliers and 1st tier c
