| 1. |
- Aili, Katarina, 1980-, et al.
(författare)
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Sleep disturbances predict future sickness absence among individuals with lower back or neck-shoulder pain : A 5-year prospective study
- 2015
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Ingår i: Scandinavian Journal of Public Health. - London : SAGE Publications. - 1403-4948 .- 1651-1905. ; 43:3, s. 315-323
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Tidskriftsartikel (refereegranskat)abstract
- Background: Musculoskeletal pain is one of the most common causes of sickness absence. Sleep disturbances are often co-occurring with pain, but the relationship between sleep and pain is complex. Little is known about the importance of self-reported sleep, when predicting sickness absence among persons with musculoskeletal pain. This study aims to study the association between self-reported sleep quality and sickness absence 5 years later, among individuals stratified by presence of lower back pain (LBP) and neck and shoulder pain (NSP). Methods: The cohort (n = 2286) in this 5-year prospective study (using data from the MUSIC-Norrtalje study) was stratified by self-reported pain into three groups: no LBP or NSP, solely LBP or NSP, and oncurrent LBP and NSP. Odds ratios (ORs) for the effect of self-reported sleep disturbances at baseline on sickness absence (> 14 consecutive days), 5 years later, were calculated. Results: Within all three pain strata, individuals reporting the most sleep problems showed a significantly higher OR for all-cause sickness absence, 5 years later. The group with the most pronounced sleep problems within the concurrent LBP and NSP stratum had a significantly higher OR (OR 2.00; CI 1.09-3.67) also for long-term sickness absence (> 90days) 5 years later, compared to the group with the best sleep. Conclusions: Sleep disturbances predict sickness absence among individuals regardless of co-existing features of LBP and/or NSP. The clinical evaluation of patients should take possible sleep disturbances into account in the planning of treatments.
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| 2. |
- Ali, Nashit, et al.
(författare)
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Friction, wear, and airborne particle emissions from rail-wheel contact with laser cladded overlays-A pin-disc tribometer simulation
- 2023
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Ingår i: Wear. - Amsterdam : Elsevier BV. - 0043-1648 .- 1873-2577. ; 518
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Tidskriftsartikel (refereegranskat)abstract
- The present study uses a pin-on-disc tribometer to evaluate friction, wear, and airborne particle emissions for a rail-wheel contact. Test pins from UIC60 900A rail carbon steels were in contact with three types of test discs surfaces: R7 wheel carbon steel, laser cladding overlayed martensitic stainless steel, and laser cladding overlayed Ni-based-8% MnS self-lubricating alloy. Test results show about halving of the coefficient of friction, 0.42 to 0.22, and one ten-power lower specific pin and disc wear of discs with self-lubricating overlay compared to standard railway carbon steel contacts. Using stainless-steel overlayed discs also resulted in one ten-power lower specific disc wear, but pin wear is unchanged. Particle emission for the tests with discs with self-lubricating overlay is constant at almost 200 particles/cm3 while running in the distance is needed for the other tests. Almost all generated airborne wear particles were in the sub-100 nm range. The use of laser-cladded (LC) overlay reduced the number of airborne wear particles in the sub-100 nm range by more than a factor of 10.
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| 3. |
- Andersson, Moa, et al.
(författare)
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Cognitive-inspired Post-processing of optical character recognition for Swedish addresses
- 2022
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Ingår i: Proceedings of 2022 IEEE 21st International Conference on Cognitive Informatics and Cognitive Computing, ICCI*CC 2022. - Piscataway, NJ : Institute of Electrical and Electronics Engineers (IEEE). ; , s. 248-257, s. 248-257
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Konferensbidrag (refereegranskat)abstract
- Optical character recognition (OCR) has many ap-plications, such as digitizing historical documents, automating processes, and helping visually impaired people read. However, extracting text from images into a digital format is not an easy problem to solve, and the outputs from the OCR frameworks often include errors. The complexity comes from the many variations in (digital) fonts, handwriting, lighting, etc. To tackle this problem, this thesis investigates two different methods for correcting the errors in OCR output. The used dataset consists of Swedish addresses. The methods are therefore applied to postal automation to investigate the usage of these methods for further automating postal work by automatically reading addresses on parcels using OCR. The first method, the lexical implementation, uses a dataset of Swedish addresses so that any valid address should be in this dataset (hence there is a known and limited vocabulary), and misspelled addresses are corrected to the address in the lexicon with the smallest Levenshtein distance. The second approach uses the same dataset, but with artificial errors, or artificial noise, added. The addresses with this artificial noise are then used together with their correct spelling to train a machine learning model based on Neural machine translation (NMT) to automatically correct errors in OCR read addresses. The results from this study could contribute by defining in what direction future work connected to OCR and postal addresses should go. The results were that the lexical implementation outperformed the NMT model. However, more experiments including real data would be required to draw definitive conclusions as to how the methods would work in real-life applications.
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| 4. |
- Ashfaq, Awais, et al.
(författare)
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A modified fuzzy C means algorithm for shading correction in craniofacial CBCT images
- 2017
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Ingår i: IFMBE Proceedings. - Singapore : Springer. - 9789811041655 - 9789811041662 ; , s. 531-538
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Konferensbidrag (refereegranskat)abstract
- CBCT images suffer from acute shading artifacts primarily due to scatter. Numerous image-domain correction algorithms have been proposed in the literature that use patient-specific planning CT images to estimate shading contributions in CBCT images. However, in the context of radiosurgery applications such as gamma knife, planning images are often acquired through MRI which impedes the use of polynomial fitting approaches for shading correction. We present a new shading correction approach that is independent of planning CT images. Our algorithm is based on the assumption that true CBCT images follow a uniform volumetric intensity distribution per material, and scatter perturbs this uniform texture by contributing cupping and shading artifacts in the image domain. The framework is a combination of fuzzy C-means coupled with a neighborhood regularization term and Otsu’s method. Experimental results on artificially simulated craniofacial CBCT images are provided to demonstrate the effectiveness of our algorithm. Spatial non-uniformity is reduced from 16% to 7% in soft tissue and from 44% to 8% in bone regions. With shading- correction, thresholding based segmentation accuracy for bone pixels is improved from 85% to 91% when compared to thresholding without shading-correction. The proposed algorithm is thus practical and qualifies as a p lug and p lay extension into any CBCT reconstruction software for shading correction.
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| 5. |
- Atabaki Pasdar, Naeimeh, et al.
(författare)
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Predicting and elucidating the etiology of fatty liver disease: A machine learning modeling and validation study in the IMI DIRECT cohorts
- 2020
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Ingår i: PLoS Medicine. - San Francisco : Public Library of Science (PLoS). - 1549-1676 .- 1549-1277. ; 17:6, s. 1003149-1003149
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Tidskriftsartikel (refereegranskat)abstract
- BACKGROUND: Non-alcoholic fatty liver disease (NAFLD) is highly prevalent and causes serious health complications in individuals with and without type 2 diabetes (T2D). Early diagnosis of NAFLD is important, as this can help prevent irreversible damage to the liver and, ultimately, hepatocellular carcinomas. We sought to expand etiological understanding and develop a diagnostic tool for NAFLD using machine learning. METHODS AND FINDINGS: We utilized the baseline data from IMI DIRECT, a multicenter prospective cohort study of 3,029 European-ancestry adults recently diagnosed with T2D (n = 795) or at high risk of developing the disease (n = 2,234). Multi-omics (genetic, transcriptomic, proteomic, and metabolomic) and clinical (liver enzymes and other serological biomarkers, anthropometry, measures of beta-cell function, insulin sensitivity, and lifestyle) data comprised the key input variables. The models were trained on MRI-image-derived liver fat content (
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| 6. |
- Athanassiou, N., et al.
(författare)
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Simulation of thermal and mechanical performance of laser cladded disc brake rotors
- 2022
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Ingår i: Proceedings of the Institution of mechanical engineers. Part J, journal of engineering tribology. - London : SAGE Publications Ltd. - 1350-6501 .- 2041-305X. ; 236:1, s. 3-14
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Tidskriftsartikel (refereegranskat)abstract
- Disc brakes wear during braking events and release airborne particulates. These particle emissions are currently one of the highest contributors to non-exhaust particle emissions and introduce health hazards as well as environmental contamination. To reduce this problem, wear and corrosion-resistant disc coatings have been implemented on grey cast iron brake disc rotors by using various deposition techniques such as thermal spraying and overlay welding. High thermal gradients during braking introduce risks of flaking off and cracking of thermally sprayed coatings with adhesive bonding to the substrate. Overlay welding by laser cladding offers metallurgical bonding of the coating to the substrate and other benefits that motivate laser cladding as a candidate for the coating of the grey cast iron brake discs. This study aims to investigate the effect of laser cladding on the thermal and thermo-structural performance of the coated grey cast iron brake discs. Therefore, thermal and thermo-stress analysis with COMSOL Multiphysics 5.6 software is performed on braking events of grey cast iron brake discs as non-coated – reference and laser cladding coated with stainless steel welding consumables. The Results demonstrated that surface temperatures were more localised, overall higher in the laser cladded coating with over three times the stresses attained of reference grey cast iron discs. The output of the simulations has been compared by tests found in the literature. Laser cladding presented higher reliability and braking performance, nonetheless requiring the evaluation of its thermal impact on other system components.
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| 7. |
- Bond, Melissa, et al.
(författare)
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The current state of using learning analytics to measure and support K-12 student engagement : A scoping review
- 2023
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Ingår i: LAK23. - New York, NY : Association for Computing Machinery (ACM). - 9781450398657 ; , s. 240-249, s. 240-249
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Konferensbidrag (refereegranskat)abstract
- Student engagement has been identified as a critical construct for understanding and predicting educational success. However, research has shown that it can be hard to align data-driven insights of engagement with observed and self-reported levels of engagement. Given the emergence and increasing application of learning analytics (LA) within K-12 education, further research is needed to understand how engagement is being conceptualized and measured within LA research. This scoping review identifies and synthesizes literature published between 2011-2022, focused on LA and student engagement in K-12 contexts, and indexed in five international databases. 27 articles and conference papers from 13 different countries were included for review. We found that most of the research was undertaken in middle school years within STEM subjects. The results show that there is a wide discrepancy in researchers’ understanding and operationalization of engagement and little evidence to suggest that LA improves learning outcomes and support. However, the potential to do so remains strong. Guidance is provided for future LA engagement research to better align with these goals. © 2023 ACM
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| 8. |
- Börjesson, Emma, 1982-, et al.
(författare)
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Visualizing Gender – Norm-critical Design and Innovation
- 2016
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Ingår i: Research Handbook on Gender and Innovation. - Cheltenham : Edward Elgar Publishing. - 9781783478118 - 9781783478132 ; , s. 252-273
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Bokkapitel (refereegranskat)abstract
- Innovation is seen as one of the main engines of economic growth. It is generally assumed to be gender neutral when, in fact, the gendered construction of innovation has been traditionally masculine. This Handbook explores the nexus between innovation and gender by providing a wide range of studies from different analytical and methodological perspectives and from various regional and industry contexts and draws implications for a gender-inclusive innovation policy. The multidisciplinary group of contributors discuss topics such as gender and innovation in new and small businesses, and growth businesses; addressing innovation in different organizational contexts ranging from public sector health care to mining and forestry; researching gender in innovation policy and in design and materiality.This Handbook will be useful to researchers looking to understand parallels between research on gender and innovation on one hand, and research on gender and entrepreneurship or management on the other. It will also be invaluable to students looking for an overview of research in both areas.
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| 9. |
- de Kwant, Colin, et al.
(författare)
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The role of product design in circular business models : an analysis of challenges and opportunities for electric vehicles and white goods
- 2021
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Ingår i: Sustainable Production and Consumption. - Amsterdam : Elsevier. - 2352-5509. ; 27, s. 1728-1742
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Tidskriftsartikel (refereegranskat)abstract
- Pursuing sustainability implies setting a multitude of open-ended goals to address environmental and socioeconomic issues today as well as those for future generations. The circular economy (CE) paradigm appears more focused regarding goals and agency to address environmental issues by using the economic system. However, companies and governments aiming to operationalize CE in practice, it has been claimed, will face six key challenges limiting the CE “net sustainability impact” potential. This work focuses on the challenges for manufacturers to adopt and operationalize CE for their business. The two key levers for manufacturers to navigate on their path from the linear (take-make-dispose) to a sustainable CE are innovating and designing of the business model and of their products. To date, however, understanding the role of product design in developing circular business models has received little attention in research. This review article builds upon the CE literature foundation, including definitions, challenges, and business modeling frameworks needed to better understand the role of product design. Building on the work of several highly cited CE-centric literature reviews and voices in research and industry, we selected and merged complementing frameworks: Slowing-Closing-Narrowing, Circular Design, and the Circular Business Model Innovation framework. To understand how to put these frameworks into practice, we analyzed CE's links with electric vehicle and white goods research and industry perspectives respectively and collectively. The review and analysis of CE and selected industries’ research was supported by a co-occurrence keyword analysis of 5,960 most cited papers in CE as well as the two product categories, electric vehicles and white goods. The analysis indicated limited maturity and linkage of circular business models and role of product design toward a CE in the research literature for the product categories. This result corroborated the knowledge gap and guided our focus in searching for further research and industry clues. We structured the clues of interest that were specific to or common across product categories and industries, using the integrated framework to visualize our Design for X conclusion. The merged framework visualizes how paths toward CE by design and logic of value creation, delivery, and capturing may differ. To conclude, the authors’ own experience and literature examples from relevant industry-leading and start-up companies are used to apply the framework and reveal strengths, weaknesses, opportunities, and threats. Future research and industry experiments focused on the circular business models based on product service systems and design for CE strategies identified, will be needed to test and extend the framework to other product categories and industry sectors.
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| 10. |
- Dellve, Lotta, 1965, et al.
(författare)
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“Making it work in the frontline” explains female home care workers´ defining, recognising, communicating and reporting of occupational disorders.
- 2008
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Ingår i: Qualitative Studies On Health And Wellbeing. - Abingdon : Informa UK Limited. - 1748-2623 .- 1748-2631. ; 3:3, s. 176-184
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Tidskriftsartikel (refereegranskat)abstract
- Epidemiological research has so far failed to explain the high incidence of occupational disorders among home care workers (HCWs) and the great differences in organizational incidence rate. A qualitative approach may contribute to a deeper understanding of work group reasoning and handling in a more contextual manner. The aim of this grounded theory study was to gain a deeper understanding of the main concern in the processes of recognizing, communicating and reporting occupational disorders among HCWs. Focus group interviews were conducted with 40 HCWs in 9 focus groups. The selected municipalities represented variations in municipality type and incidence rate of occupational disorders. Making it work in the frontline was identified as the core category explaining that the perceived work situation in home care work was the main concern but interacted with work-group socialising processes as well as with the communicability and derivability of the occupational disorder when defining and reporting occupational disorders. Complex problems could be reformulated and agreed within the workgroup to increase communicability. Described significances for reporting/non-reporting were related to financial compensation, to a part of organizational political game or to an existential uncertainty, i.e. questioning if it belonged to their chosen work and life. Our conclusion is that working situation and work group attitudes have importance for reporting of occupational disorders. To support work-related health for HCWs, integrating communication should be developed about work-related challenges in work situation, as well as about attitudes, culture and efficiency within work-group.
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