| 1. |
- Filipovic, Mirjana
(author)
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Evolution of artificial defects during shape rolling
- 2007
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Licentiate thesis (other academic/artistic)abstract
- Very often defects are present in rolled products. For wire rods, defects are very deleterious since the wire rods are generally used directly in various applications. For this reason, the market nowadays requires wire rods to be completely defect-free. Any wire with defects must be rejected as scrap which is very costly for the production mill. Thus, it is very important to study the formation and evolution of defects during wire rod rolling in order to better understand and minimize the problem, at the same time improving quality of the wire rods and reducing production costs. The present work is focused on the evolution of artificial defects during rolling. Longitudinal surface defects are studied during shape rolling of an AISI M2 high speed steel and a longitudinal central inner defect is studied in an AISI 304L austenitic stainless steel during ultra-high-speed wire rod rolling. Experimental studies are carried out by rolling short rods prepared with arteficial defects. The evolution of the defects is characterised and compared to numerical analyses. The comparison shows that surface defects generally reduce quicker in the experiments than predicted by the simulations whereas a good agreement is generally obtained for the central defect.
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| 2. |
- Filipovic, Mirjana, et al.
(author)
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Experimental and numerical study of the evolution of artificial inner defects in stainless steel rolled in a wire rod block
- 2009
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Other publication (other academic/artistic)abstract
- The evolution of a central longitudinal defect was investigated for an austenitic stainless steel of type AISI 304L by preparing 12.5 mm round bars with a 4 mm round hole of length 100 mm. The evolution was monitored by taking out bars, rolled 1, 1+2, 1+2+3 passes and so on, from a wire rod block operated at a final exiting speed of 60 m/s. Cross sections of the rolled bars through the central defect were investigated with respect to geometrical changes and microstructure. The rolling process of the first 4 passes were analysed with FEM. The results show good agreement between simulations and experiments. In general, the defect is reduced quicker in size than predicted by a pure geometrical scaling. The analyses show that the round passes are more effective in reducing the defect size than the ovals. The velocity changes imposed by the central defect closing and reopening is analysed.
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| 3. |
- Gräsner, Jan-Thorsten, et al.
(author)
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Survival after out-of-hospital cardiac arrest in Europe - Results of the EuReCa TWO study.
- 2020
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In: Resuscitation. - : Elsevier BV. - 0300-9572 .- 1873-1570. ; 148, s. 218-226
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Journal article (peer-reviewed)abstract
- BACKGROUND: The epidemiology and outcome after out-of-hospital cardiac arrest (OHCA) varies across Europe. Following on from EuReCa ONE, the aim of this study was to further explore the incidence of and outcomes from OHCA in Europe and to improve understanding of the role of the bystander.METHODS: This prospective, multicentre study involved the collection of registry-based data over a three-month period (1st October 2017 to 31st December 2017). The core study dataset complied with the Utstein-style. Primary outcomes were return of spontaneous circulation (ROSC) and survival to hospital admission. Secondary outcome was survival to hospital discharge.RESULTS: All 28 countries provided data, covering a total population of 178,879,118. A total of 37,054 OHCA were confirmed, with CPR being started in 25,171 cases. The bystander cardiopulmonary resuscitation (CPR) rate ranged from 13% to 82% between countries (average: 58%). In one third of cases (33%) ROSC was achieved and 8% of patients were discharged from hospital alive. Survival to hospital discharge was higher in patients when a bystander performed CPR with ventilations, compared to compression-only CPR (14% vs. 8% respectively).CONCLUSION: In addition to increasing our understanding of the role of bystander CPR within Europe, EuReCa TWO has confirmed large variation in OHCA incidence, characteristics and outcome, and highlighted the extent to which OHCA is a public health burden across Europe. Unexplained variation remains and the EuReCa network has a continuing role to play in improving the quality management of resuscitation.
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| 4. |
- Jonsson, Marika, et al.
(author)
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Development and Evaluation of eHealth Services Regarding Accessibility : Scoping Literature Review
- 2023
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In: Journal of Medical Internet Research. - : NLM (Medline). - 1438-8871. ; 25
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Journal article (peer-reviewed)abstract
- BACKGROUND: Accessibility is acknowledged as a key to inclusion in the Convention of Rights for People with Disabilities. An inaccessible design can result in exclusion from eHealth and cause disability among people who have impairments. OBJECTIVE: This scoping literature review aimed to investigate how eHealth services have been developed and evaluated regarding accessibility for people with impairments. METHODS: In line with Arksey and O'Malley's framework for scoping studies and using the Preferred Reporting Items for Systematic Reviews and Meta-Analyses extension for Scoping Reviews (PRISMA-ScR), we conducted a search in 4 databases (PubMed, Scopus, IEEE, and Web of Science) in October 2020 and an update of the search in June 2022. The search strategy was structured according to the PICO model as follows: Population/Problem, digital accessibility for users with impairment; Intervention, health care delivered by any digital solution; Comparison, not applicable; Outcome, use of and adherence to (1) Web Content Accessibility Guidelines (WCAG), (2) other accessibility guidelines, and (3) other means, for designing or evaluating accessibility in eHealth services. A Boolean search was conducted by combining terms related to accessibility and eHealth. All authors participated in screening abstracts according to the eligibility criteria. Each publication, containing a potentially relevant abstract, was read (full text) and assessed for eligibility by 2 authors independently and pairwise. Publications deemed eligible were read by all authors and discussed for consensus. RESULTS: A total of 8643 publications were identified. After abstract screening, 131 publications remained for full-text reading. Of those, 116 publications were excluded as they did not meet the eligibility criteria. Fifteen publications involving studies of 12 eHealth services were included in the study. Of the 15 publications, 2 provided a definition of accessibility, 5 provided an explanation of accessibility, and 8 did not provide any explanation. Five publications used the WCAG to evaluate accessibility when developing eHealth services. One publication used International Organization for Standardization (ISO) 29138, ISO 2941, and ISO/International Electrotechnical Commission (IEC) 30071-1 standards together with the Spanish Association for Standardization (UNE) 139803 standard. Eleven publications used other means to address accessibility, including text-level grading; literature review about accessibility; user tests, focus groups, interviews, and design workshops with target groups of patients, relatives, and health care professionals; and comparative analysis of existing technical solutions to provide information about useful requirements. CONCLUSIONS: Although a clear definition of accessibility can enhance operationalization and thus measurability when evaluating accessibility in eHealth services, accessibility was insufficiently defined in most of the included studies. Further, accessibility guidelines and standards were used to a very limited extent in the development and evaluation of eHealth services. Guidelines for developing complex interventions that include guidance for accessibility are motivated to ensure that accessibility will be considered systematically in eHealth services. ©Marika Jonsson, Stefan Johansson, Dena Hussain, Jan Gulliksen, Catharina Gustavsson. Originally published in the Journal of Medical Internet Research (https://www.jmir.org), 17.08.2023.
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| 5. |
- Jonsson, Marika, et al.
(author)
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How have public healthcare providers in Sweden conformed to the European Union’s Web Accessibility Directive regarding accessibility statements on their websites?
- 2023
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In: Universal Access in the Information Society. - : Springer Nature. - 1615-5289 .- 1615-5297.
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Journal article (peer-reviewed)abstract
- The Web Accessibility Directive (WAD) is part of the European Union’s work for digital inclusion. The WAD obligates that public sector bodies’ websites meet accessibility standards and provide an accessibility statement on the website informing about inaccessible content, and a feedback mechanism for reporting accessibility issues or requesting inaccessible content in an accessible format. The objective of this study was to evaluate how healthcare providers in Sweden have applied accessibility statements on their websites as regulated by law. A descriptive study using a mixed methods approach was conducted, by quantitative descriptive data analysis of the healthcare providers’ accessibility statements compliance to requirements and qualitative data analysis of the written information provided in the accessibility statement. All but one of the 37 evaluated healthcare providers published an accessibility statement. None of the healthcare providers fully met the requirements for accessibility statements, and no one complied with the intention of the law, i.e. to provide accessible health information and eHealth services. There was no or minor progress between the first and the latest published accessibility statement. The possibility to declare no or partial compliance with the law, or claim disproportionate burden, and the lack of enforcement procedures, risk producing symbolic actions e.g., publishing accessibility statements without intention to abide by the law. We suggest that the directives for accessibility statements should be advanced regarding comprehensiveness, understandability, and usefulness. It is suggested that the assessment protocol developed for this study may be used for future evaluations of accessibility statements.
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