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Comparison of different powered-wheelchair control modes for individuals with severe motor impairments

This paper presents the preliminary evaluation of different powered-wheelchair control modes for individuals with severe motor impediments. To this end, a C400 Permobil wheelchair has been updated with a control command communication interface and equipped with a scanning laser sensor to carry out the automation algorithms that are part of the robot operating system framework. A pilot test was per

Energy Supply Models for Transition to Renewable and Locally Produced Energy: a Study of the Possibilities for the Municipality of Tjörn to Make an Energy Transition

An energy system that relies on fossil fuel is not sustainable. Emissions, such as carbon dioxide, nitric oxide and corpuscles, affect the climate and pollute the air. Furthermore, the supply of oil, coal and natural gas is located a few places worldwide, which can give provide incentive to geopolitical conflicts for access to these areas. This is not a local issue for Tjörn, nor even a national i

Fashion

Fashion's universal nature does not preclude strong variations in its significance from society to society. As a stratification variable, fashion's importance increases in step with economic growth. Simmel sees the ‘need for distinction’ and the ‘need for union’ as preconditions for fashion, with certain societies lacking the necessary motivation. Variations in fashion's importance have also been

Personality and self-concept in subgroups of patients with anorexia nervosa and bulimia nervosa

The question of subgroups in eating disorders was addressed in this study. According to the DSM-IV manual, the two subtypes for anorexia nervosa are restricting and binge-eating/purging. For bulimia nervosa, the subtypes are purging and non-purging. An attempt was made here to examine alternative ways to create meaningful subgroups in the eating disordered patient group. A cluster analysis was per

The perishable past : On the advantage and disadvantage of archaeology for life

A discussion on whether and why archaeology is important, with Mårup Church (Denmark) as point of departure. The church will soon fall into the sea. Why is it crucial to save or document this church? Rhetorical catchwords, cultural mangagement, archaeology, history and social anthropology are presented and critically examined.

The kinetics of lipid micro-emboli during cardiac surgery studied in a porcine model.

Objective. To study the kinetics of lipid micro-emboli during cardiac surgery. Design. Eleven pigs were studied. Seven of these were put on extracorporeal circulation. A shed blood phantom consisted of blood, saline and radioactive triolein was added to the circuit. Both venous and arterial blood samples were taken at short intervals. Four animals were used to study renal kinetics without extracor

Chapter 3. A Review of Energy Saving Potential and Strategies for Electric Lighting in Future Low Energy Office Buildings

This chapter presents key energy use figures and explores the energy saving potential for electric lighting in office buildings based on a review of relevant literature, with special emphasis on a North European context. The review outlines that an energy intensity of around 10 kWh/m2yr is a realistic target for electric lighting in future low energy office buildings, based on theoretical calculat

Theory and Analysis of Higher-Order Motion Blur Rasterization

A common assumption in motion blur rendering is that the triangle vertices move in straight lines. In this paper, we focus on scenarios where this assumption is no longer valid, such as motion due to fast rotation and other non-linear characteristics. To that end, we present a higher-order representation of vertex motion based on Bézier curves, which allows for more complex motion paths, and we de

On Parameter Estimation and Control of Time-Varying Stochastic Systems

Popular Abstract in Swedish Denna avhandling kan delas in i två delar. Den första delen behandlar en analys av en vanlig parameter estimations algoritm - Rekursiv Minska Kvadrat (RMK) algoritmen. Denna algoritm används ofta inom tekniska tillämpningar när man vill estimera modeller i realtid. T.ex. kan RMK användas för att finna modeller på hur framtida elförbrukning i Malmö (eller någon annan staThis thesis is about parameter estimation and control of time-varying stochastic systems. It can be divided into two parts. The first part deals with an estimation algorithm commonly used when estimating parameters in time-varying stochastic systems, the Recursive Least Squares (RLS) algorithm with forgetting factor. The exact statistical properties for the RLS-estimator with forgetting factor ar

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Integration of computer aided design analysis into the engineering design process for use by engineering designers

When developing products, engineering designers often face the problem that their candidate for a technical solution, ranging from a concept to a detailed design, needs to be analyzed by a design analyst before it is approved or rejected and the engineering designer can continue his/her activities within the product development process. If engineering designers have to send every solution candidat