Stefan Lundberg

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A controlled power electronic converter can cause local instabilities when interacting with other dynamic subsystems in a power system. Oscillations at a certain frequency cannot, however, build up if the converter differential input admittance has a positive conductance (real part) at that frequency, since power is then dissipated. In this paper,(More)
PURPOSE To identify, based on the literature, people with dementia's potentials to manage an easy-to-use videophone, and to develop a videophone requirement specification for people with dementia. METHOD The study is based on the Inclusive Design method, utilising the first two of four phases. Content analyses of literature reviews were used to identify(More)
BACKGROUND Persons with dementia might have considerable difficulties in using an ordinary telephone. Being able to use the telephone can be very important in order to maintain their social network, getting stimulation and for reaching help when needed. Therefore, persons with dementia might need an easy-to-use videophone to prevent social isolation and to(More)
In today’s aging societies, elderly people often have difficulties to find people to communicate with. To address this loneliness of the elderly, it has been suggested to create more opportunities for children and elderly people to engage in various shared activities together. In this ongoing research, we investigate that social offline games can facilitate(More)
In Stockholm during the years 1999-2002 some residential housing units provided with advanced IT-based functions were developed, also called smart homes systems. The purpose was to offer the residents an augmented living environment mainly regarding security and comfort. Only the IT company that originally developed the basic system fully knows it in depth,(More)
PURPOSE To develop assistive technology that would help an older person to arise from a kneeling position to a standing one. METHODS Developing a prototype, based on an inclusive design and then testing the prototype to verify the approach. The prototype was subsequently tested by a panel of 20 elderly users. These tests were observed and filmed.(More)
The aim of the study was to identify problematic situations in using zebra crossings. They were identified from photo documentations comprising film sequences and the perspectives of people with dementia. The aim was also to identify how they would understand, interpret and act in these problematic situations based on their previous experiences and linked(More)
PURPOSE The aim was to better understand how information and communication technology (ICT) can provide support to elderly family caregivers caring for significant others suffering from dementia or stroke. METHOD Ten households equipped with an ICT system, with a family caregiver and a spouse diagnosed with dementia or stroke, were followed and observed(More)
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