| 1. |
- Libungan, Berglind, et al.
(author)
-
Out-of-hospital cardiac arrest in the elderly : A large-scale population-based study.
- 2015
-
In: Resuscitation. - : Elsevier BV. - 0300-9572 .- 1873-1570. ; 94
-
Journal article (peer-reviewed)abstract
- BACKGROUND: There is little information on elderly people who suffer from out-of-hospital cardiac arrest (OHCA).AIM: To determine 30-day mortality and neurological outcome in elderly patients with OHCA.METHODS: OHCA patients ≥ 70 years of age who were registered in the Swedish Cardiopulmonary Resuscitation Register between 1990 and 2013 were included and divided into three age categories (70-79, 80-89, and ≥ 90 years). Multiple logistic regression analyses were performed to identify independent predictors of 30-day survival.RESULTS: Altogether, 36,605 cases were included in the study. Thirty-day survival was 6.7% in patients aged 70-79 years, 4.4% in patients aged 80-89 years, and 2.4% in those over 90 years. For patients with witnessed OHCA of cardiac aetiology found in a shockable rhythm, survival was higher: 20%, 15%, and 11%, respectively. In 30-day survivors, the distribution according to the cerebral performance categories (CPC) score at discharge from hospital was similar in the three age groups. In multivariate analysis, in patients over 70 years of age, the following factors were associated with increased chance of 30-day survival: younger age, OHCA outside the home, witnessed OHCA, CPR before arrival of EMS, shockable first-recorded rhythm, and short emergency response time.CONCLUSIONS: Advanced age is an independent predictor of mortality in OHCA patients over 70 years of age. However, even in patients above 90 years of age, defined subsets with a survival rate of more than 10% exist. In survivors, the neurological outcome remains similar regardless of age.
|
|
| 2. |
- Bergeå, Ola, et al.
(author)
-
Education for sustainability as a transformative learning process: a pedagogical experiment in EcoDesign doctoral education
- 2006
-
In: Journal of Cleaner Production. - : Elsevier. - 0959-6526 .- 1879-1786. ; 14:15-16, s. 1431-1442
-
Journal article (peer-reviewed)abstract
- The paper presents details about a doctoral-level EcoDesign course, as an education for sustainable development experience, in relation to pedagogic theory. The aim was to promote transformative learning in order to facilitate more productive use of environmental knowledge in product and business development. The course included interdisciplinary dialogue founded in real world experiences presented by lecturers from business, government and NGOs, as well as study visits and group work on the drafting of journal papers. The key pedagogical objective was to widen the perspective to embrace more humanly engaging concerns and to enhance the student's overall understanding about relations between sustainable development priorities and product design practices.
|
|
| 3. |
|
|
| 4. |
- Gustafsson, Emil
(author)
-
Design and application of experimental methods for steel sheet shearing
- 2016
-
Doctoral thesis (other academic/artistic)abstract
- Shearing is the process where sheet metal is mechanically cut between two tools. Various shearing technologies are commonly used in the sheet metal industry, for example, in cut to length lines, slitting lines, end cropping etc. Shearing has speed and cost advantages over competing cutting methods like laser and plasma cutting, but involves large forces on the equipment and large strains in the sheet material. The constant development of sheet metals toward higher strength and formability leads to increased forces on the shearing equipment and tools.Shearing of new sheet materials imply new suitable shearing parameters. Investigations of the shearing parameters through live tests in the production are expensive and separate experiments are time consuming and requires specialized equipment. Studies involving a large number of parameters and coupled effects are therefore preferably performed by finite element based simulations. Accurate experimental data is still a prerequisite to validate such simulations. There is, however, a shortage of accurate experimental data to validate such simulations.In industrial shearing processes, measured forces are always larger than the actual forces acting on the sheet, due to friction losses. Shearing also generates a force that attempts to separate the two tools with changed shearing conditions through increased clearance between the tools as result. Tool clearance is also the most common shearing parameter to adjust, depending on material grade and sheet thickness, to moderate the required force and to control the final sheared edge geometry.In this work, an experimental procedure that provides a stable tool clearance together with accurate measurements of tool forces and tool displacements, was designed, built and evaluated. Important shearing parameters and demands on the experimental set-up were identified in a sensitivity analysis performed with finite element simulations under the assumption of plane strain. With respect to large tool clearance stability and accurate force measurements, a symmetric experiment with two simultaneous shears and internal balancing of forces attempting to separate the tools was constructed.Steel sheets of different strength levels were sheared using the above mentioned experimental set-up, with various tool clearances, sheet clamping and rake angles. Results showed that tool penetration before fracture decreased with increased material strength. When one side of the sheet was left unclamped and free to move, the required shearing force decreased but instead the force attempting to separate the two tools increased. Further, the maximum shearing force decreased and the rollover increased with increased tool clearance.Digital image correlation was applied to measure strains on the sheet surface. The obtained strain fields, together with a material model, were used to compute the stress state in the sheet. A comparison, up to crack initiation, of these experimental results with corresponding results from finite element simulations in three dimensions and at a plane strain approximation showed that effective strains on the surface are representative also for the bulk material.A simple model was successfully applied to calculate the tool forces in shearing with angled tools from forces measured with parallel tools. These results suggest that, with respect to tool forces, a plane strain approximation is valid also at angled tools, at least for small rake angles.In general terms, this study provide a stable symmetric experimental set-up with internal balancing of lateral forces, for accurate measurements of tool forces, tool displacements, and sheet deformations, to study the effects of important shearing parameters. The results give further insight to the strain and stress conditions at crack initiation during shearing, and can also be used to validate models of the shearing process.
|
|
| 5. |
- Karlsson, Fredrik, 1977-
(author)
-
Weighing Animal Lives : A Critical Assessment of Justification and Prioritization in Animal-Rights Theories
- 2009
-
Doctoral thesis (other academic/artistic)abstract
- The project underlying this dissertation aims at analyzing three pro-animal-rights theories, evaluating the theories, and outlining an alternative theoretical account of animal rights. The analytical categories are justification and function of animal rights, the definition of the right holder, and the resolution approach to rights conflict. The categories are applied to a naturalist, a theocentric, and a contractarian approach to defend animal rights. The evaluation is substantiated by the assumption that rights are meant to protect less powerful beings against more powerful aggressors. The constructive segment is an investigation into what extent identified disadvantages of the theories can be avoided by outlining a new model for animal rights.The analyses and evaluation suggest that all three theories are at risk of contradicting the proper function of rights-based theories. Tom Regan’s naturalist account of animal rights includes a logical possibility to sacrifice less capable beings for the sake of more capable beings. Andrew Linzey’s theocentric case for animal rights may sometimes mean that vulnerable human persons should be sacrificed for more powerful non-human beings. Mark Rowlands’ outlined contractarian model, further reconstructed in this work, fails to provide a way to resolve rights conflicts, making the function of rights inapplicable to conflicts.In conclusion, it is suggested that defining the right holder as a self-preservative being can be supported by, at least, the contractarian rationale. That would also conform to the proper function of rights-based theories. It is also suggested that this means that rights conflicts should be resolved by a voluntary sacrifice of the most powerful being. Practical circumstances should be created where such voluntarity is both genuine and rationally possible.
|
|
| 6. |
|
|
| 7. |
- Sandell, Anders, et al.
(author)
-
Growth of ultrathin ZrO2 films on Si(100) : film-thickness-dependent band alignment
- 2007
-
In: Applied Physics Letters. - : American Institute of Physics. - 0003-6951 .- 1077-3118. ; 88:13
-
Journal article (peer-reviewed)abstract
- The band alignment of ultrathin ZrO2 films of different thickness formed on Si(100) have been monitored with synchrotron radiation photoelectron spectroscopy and x-ray absorption spectroscopy. The films were deposited sequentially by way of metal-organic chemical-vapor deposition in ultrahigh vacuum. A significant decrease in the conduction band offset is found for increasing film thickness. It is accompanied by a corresponding increase of the valence band offset. The variations originate in the formation of an interfacial layer characterized by a lower degree of Zr-O interaction than in bulk ZrO2 but with no clear evidence for partially occupied Zr 4d dangling bonds.
|
|
