| 11. |
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| 12. |
- Olsson, Tomas, et al.
(författare)
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Cost-efficient drilling using industrial robots with high-bandwidth force feedback
- 2010
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Ingår i: Robotics and Computer-Integrated Manufacturing. - : Elsevier. - 0736-5845 .- 1879-2537. ; 26:1, s. 24-38
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Tidskriftsartikel (refereegranskat)abstract
- Here we present a method for high-precision drilling using an industrial robot with high-bandwidth force feedback which is used for building up pressure to clamp-up an end-effector to the work-piece surface prior to drilling, The focus is to eliminate the sliding movement (skating) of the end-effector during the clamp-up of the end-effector to the work-piece surface, an undesired effect that is due to the comparatively low mechanical stiffness of typical serial industrial robots. This compliance also makes the robot deflect due to the cutting forces, resulting in poor hole position accuracy and to some extent in poor hole quality. Recently, functionality for high-bandwidth force control has found its way into industrial robot control systems. This could potentially open up the possibility for robotic drilling systems with improved performance, using only standard systems without excessive extra hardware and calibration techniques. Instead of automation with expensive fixtures and precise machinery, our approach was to make use of standard low-cost robot equipment in combination with sensor feedback. The resulting sliding suppression control results in greatly improved hole positioning and quality. The conceptual idea behind the force control is useful also in many other robotic applications requiring external sensor feedback control.
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| 13. |
- Pendleton, Hillevi, et al.
(författare)
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Posterior laryngitis: a disease with different aetiologies affecting health-related quality of life:a prospective case–control study
- 2013
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Ingår i: BMC Ear, Nose and Throat Disorders. - : Springer Science and Business Media LLC. - 1472-6815. ; 13:11
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Tidskriftsartikel (refereegranskat)abstract
- Background: Laryngo-pharyngeal reflux (LPR) is assumed to be the most common cause of posterior laryngitis (PL). Since LPR is found in healthy subjects, and PL patients are not improved by acid-reducing therapy, other aetiologies to PL must be considered. The aims of this study in PL were to investigate the prevalence of acid reflux in the proximal oesophagus and functional gastrointestinal symptoms, to analyse motilin levels in plasma, and to assess health-related quality of life (HRQOL) before and after treatment. Methods: Forty-six patients (26 women), with verified PL, median age 55 (IQR 41–68) years, were referred to oesophago-gastro-duodenoscopy and 24-h pH monitoring. Plasma motilin was analysed. The 36-item Short-Form questionnaire was completed at inclusion and at follow-up after 43±14 months, when also the Visual Analogue Scale for Irritable Bowel Syndrome was completed. Values were compared to controls. Treatment and relief of symptoms were noted from medical records. Results: Thirty-four percent had proximal acid reflux and 40% showed signs of distal reflux. Ninety-four percent received acid-reducing treatment, with total relief of symptoms in 17%. Patients with reflux symptoms had lower plasma motilin levels compared to patients without reflux symptoms (p = 0.021). The HRQOL was impaired at inclusion, but improved over time. Patients, especially men, had more functional gastrointestinal symptoms than controls. Conclusions: This study indicates that a minority of patients with PL has LPR and is cured by acid-reducing therapy. Disturbed plasma motilin levels and presence of functional gastrointestinal symptoms are found in PL. The impaired HRQOL improves over time.
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| 14. |
- Persson, Monika, 1979-
(författare)
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The dynamics of policy formation : making sense of feelings of public unsafety
- 2014
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- Every policy problem has inherent value dimensions. It is on the basis of values that a state of affairs is perceived as undesirable, and thus acknowledged as a problem. This makes the process of defining and negotiating the meaning of a problem an essentially political process. Despite this, bureaucracy and expertise have a strong, if not increasing, influence over the formation of policy problems. An objectivist knowledge view predominates within the public managerial realm, which obscures the political dimension of problem formulation, while policy problems tend to be approached as a matter of efficiency.This thesis provides an account of mechanisms that shape and constrain the way a particular policy problem is understood and addressed. It analyses how policy actors make sense of particular problems, by drawing on different discourses (scientific, institutional, popular or media). The empirical case of this thesis is the formation of public safety policy in Sweden. The understanding of the problem of unsafety within Swedish policy is shown to be intrinsically related to the research field of fear of crime. The two are mutually dependent and exert an ideational path dependency. The ideational constraints on the understanding of unsafety are further affected by the institutional setting. It is argued that the appointed institutions and the emphasis on local level have a part in fostering individualist explanations and solutions,while obviating structural interpretations of the problem.The thesis finds that when governing complex policy problems there is a need to pay closer attention to how the problem is defined and how its meaning is constrained. It is crucial to make transparent the values inherent in definitions of problems as well as in research claims. By acknowledging the entwinement of policy and research the policy formation process may become characterized by greater reflexivity, and the possibility of resolving wicked problems may enlarge.
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| 15. |
- Sjöström, Mårten, 1967-, et al.
(författare)
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A digital 3D signage system and its effect on customer behavior
- 2011
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Ingår i: The International Conference on 3D Imaging (IC3D). - : IEEE conference proceedings. - 9781479915774
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Konferensbidrag (refereegranskat)abstract
- The use of digital signs simplifies distribution. Importantly, it draws more attention than static signs. A way to increase attention is to add an experienced depth. The paper discusses possible alternatives for extending an existing digital signage system to display stereoscopic 3D contents, comparing a decentralized distribution solution and a centralized solution. A functional prototype system was implemented. A new 3D player was developed to render views from different formats. The implemented system was used to study customer behavior when exposed to digital stereoscopic 3D signage in a direct sales situation. The proportion of sales of selected products related to the total number of sold products varied approximately equally before and during tests. An interview study suggests that the sign did not interact with customer decisions: customers were lost at different stages in this series of steps, among others the sign placement.
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