| 1. |
- Ek, Staffan, et al.
(författare)
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Relative Age Effect of Sport Academy Adolescents, a Physiological Evaluation
- 2020
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Ingår i: Sports. - Basel : MDPI. - 2075-4663. ; 8:1
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Tidskriftsartikel (refereegranskat)abstract
- The relationship between birth quarter distribution and physiological characteristics related to athletic skills, in adolescent sport academy students has not been fully investigated. In a cross-sectional study, we recruited 86 boys and 52 girls aged 12-14 years during their first term at a sport academy school. We measured body size, cardiac size, pulmonary function, body composition, lower body power, cardiorespiratory fitness parameters, and running endurance by standard methods and analyzed these estimates in relation to birth quarter by ANOVA. Birth quarter distribution in our cohort was compared with birth quarter distribution in the same ages in the whole of Sweden and analyzed by logistic regression. The academy had an overrepresentation of students born in the first quartile of the year compared to those born in the last quartile (odds ratio 2.3 (95% CI: 1.1-4.7)). When comparing the physiological characteristics between birth quarters, uniformity is prominent since out of 26 performed physiological and anthropometric tests only four showed statistically significant group differences. We thus believe that the selection process to the sport academy favours athletes with higher chronological age, i.e., a so-called relative age effect is present. © 2020 MDPI (Basel, Switzerland).
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| 2. |
- Eriksson, Kalle, 1991-
(författare)
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Politicising automation : ideas on work, technology, and agency in the Swedish political debate
- 2024
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- Over the last decade, rapid advancements in artificial intelligence and other automation technologies have sparked extensive and sometimes heated debates over the wider societal impacts of ongoing technological shifts. Even if there is wide agreement that policymaking will play a crucial role for how the future of automation will unfold, these debates tend to emphasise the technical and economic aspects of labour automation while largely overlooking its inherently political dimensions. In recent years, critical scholars within the social sciences have sought to challenge this narrow focus by bringing attention to the various biased effects that automation processes give rise to in terms of justice and power, but automation of labour as a political issue in and of itself remains underexplored. Given the broad acknowledgement of the importance of policymaking, what is especially needed is an increased understanding of how policymakers themselves interpret this issue, as well as their own roles in relation to it. This thesis aims to narrow this knowledge gap by examining the manifest and latent political ideas that underpin the ways in which Swedish policymakers interpret and negotiate the issue of automation, to thereby gain a fuller understanding of what key values that are at stake in the Swedish automation debate. To do so, an ideational analysis has been conducted using parliamentary documents, media and party texts, as well as semi-structured interviews with policymakers as data.The analysis shows that while Swedish policymakers generally perceive automation of labour as a non-contentious issue in Swedish politics, their ideas on the matter are informed by underlying normative and empirical assumptions that lead to conflicting conclusions regarding both the desirability of increased automation and the roles of policymaking for governing the technologies in question. The analysis also finds that actors’ views on automation are tightly connected to their views on a range of related, more fundamental, political issues – such as the character and values of human labour, and the role of the state in relation to the market. Since these related issues are indeed quite ideologically polarising in the Swedish context, the findings indicate that also automation is a more polarising issue than many policymakers perceive it to be. In other words, while the issue has yet to cause any explicit political conflicts in the Swedish debate, the identified disparities and ideational tensions clearly suggest that automation is not merely a technological inevitability but a complex, politically charged arena where different, if often latent, visions of the future contend.Thus, the portrayal of automation as a politically neutral phenomenon risks obscuring its inherently contestable character and preventing the critical ideological debates that therefore ought to surround it. By bringing our attention to the different and sometimes conflicting political ideas that automation is subject to, the thesis aims to contribute to a more politicised automation debate in which said ideas are not shied away from but openly contested and deliberated over. Such a debate would not only be more democratic, but also more likely to realise some of the unprecedented opportunities that automation technologies grant us.
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| 3. |
- Drake, Henrik, Docent, 1979-, et al.
(författare)
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Biosignatures of ancient microbial life are present across the igneous crust of the Fennoscandian shield
- 2021
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Ingår i: Communications Earth & Environment. - : Springer Nature. - 2662-4435. ; 2:1
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Tidskriftsartikel (refereegranskat)abstract
- Earth’s crust contains a substantial proportion of global biomass, hosting microbial life up to several kilometers depth. Yet, knowledge of the evolution and extent of life in this environment remains elusive and patchy. Here we present isotopic, molecular and morphological signatures for deep ancient life in vein mineral specimens from mines distributed across the Precambrian Fennoscandian shield. Stable carbon isotopic signatures of calcite indicate microbial methanogenesis. In addition, sulfur isotope variability in pyrite, supported by stable carbon isotopic signatures of methyl-branched fatty acids, suggest subsequent bacterial sulfate reduction. Carbonate geochronology constrains the timing of these processes to the Cenozoic. We suggest that signatures of an ancient deep biosphere and long-term microbial activity are present throughout this shield. We suggest that microbes may have been active in the continental igneous crust over geological timescales, and that subsurface investigations may be valuable in the search for extra-terrestrial life.
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| 4. |
- Karlsson Good, Magnus, 1988-, et al.
(författare)
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Increasing the accessibility to internet-based cognitive behavioural therapy for depression : A single-blind randomized controlled trial of condensed versus full-text versions
- 2023
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Ingår i: Internet Interventions. - : Elsevier. - 2214-7829. ; 34
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Tidskriftsartikel (refereegranskat)abstract
- Background: Research shows that internet-based cognitive behavioural therapy (iCBT) is an effective treatment for depression. However, little is known about how the length of the text material in iCBT affects outcomes. Objective: The aim of this study was to test whether a condensed iCBT version for depression would be noninferior to the existing full-text version in reducing depressive symptoms at post-treatment. We also wanted to test non-inferiority for secondary outcomes and explore reading speed and ADHD symptoms as potential moderators. Method: A single-blind randomized controlled trial was conducted (N = 267) comparing two versions of guided iCBT for depression; full-text (around 60,000 words) and condensed (around 30,000 words, with the option to listen to the text). Estimated between-group effect sizes and their confidence intervals for depression, anxiety and quality of life, were compared to a pre-determined non-inferiority margin (ES = 0.4). Moderation analyses of reading speed and ADHD symptoms were conducted. Results: The condensed version of iCBT was non-inferior to the full-text version on post-treatment measures for depressive symptoms (95 % CI = - 0.42-0.24), anxiety symptoms (95 % CI = - 0.24-0.32), and quality of life (95 % CI = - 0.09-0.49). Non-inferiority was inconclusive for depressive symptoms at the one-year follow-up (95 % CI = - 0.60-0.47). There was no significant moderation effects of reading speed (p = 0.06) or ADHD symptoms (p = 0.11) on depressive symptoms. Conclusion: These results indicate that a condensed version of iCBT for depression is as effective at treating depression as the full-text version. By shortening texts, iCBT may be made available to more people. Due to unequal dropout rates between the groups, these results are preliminary and need to be replicated.
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| 5. |
- Karlsson, Johan, 1990-
(författare)
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Essays on Family Firms and Firm Growth Barriers
- 2020
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- This thesis concerns the implications of family ownership and perceived growth barriers for firm decision-making and performance. The first article examines the inclusion of family business in economics doctoral programs in the United States and Sweden, as well as the views of professors and textbook authors and research on family business. It is found that family business is not included in the examined curricula. Furthermore, professors and authors do not publish research on family business and generally do not see a need to incorporate it into economic theory. The article concludes by discussing the causes of this omission, as well as strategies to overcome them in order to further our understanding of economic action. The second article presents a novel strategy for identifying domiciled family firms using total population data. By applying this strategy to Swedish data, family firms are found to contribute to one-third of Swedish employment and gross domestic product, and a significant share of Sweden’s largest firms are family-owned. In general, family firms are found to be smaller than their non-family equivalents, although they are more profitable. Meanwhile, differences between family firms and nonfamily firms are found to diminish with firm size. The third article examines whether family firms have a comparative employment growth advantage over nonfamily firms in regions with relatively low population density. As a group, family firms are found to be the main source of job creation in rural regions, largely as a result of their large numbers. Nevertheless, the average family firm is found to grow more slowly than the average non-family firm. Meanwhile, in line with the study’s conjecture, this difference is found to decrease across the urban-rural context, i.e., across metropolitan, urban and rural regions. The fourth paper examines the representation of women in top management teams1 in family firms and non-family firms. Moreover, the share of women in a firm’s top management team is found to be positively associated with the additional appointment of female managers. Lastly, kinship bonds between the owning families and prospective managers are found to be positively associated with the appointment of women on top management teams. The fifth paper aims to capture the relationship between perceived growth barriers and firm size, which is achieved by developing a novel data-driven strategy for identifying firm size groups. It is found that smaller firms typically face accessibility constraints on equity financing, whereas larger firms generally face barriers related to competition and accessibility to qualified staff. These results are benchmarked against those using prevailing strategies for measuring firm size, whereby it is suggested that there may be a need for methodological rethinking in the field regarding its treatment of firm size.
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| 6. |
- Karlsson, Sofia, 1991-
(författare)
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Saving lives during major underground mining incidents : becoming prepared for a collaborative response
- 2020
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- Background: Major incidents in underground mines are uncommon, but they can have severe consequences. In Sweden, the municipal rescue service and the regional emergency medical service (EMS) are dispatched to mining incidents, and together with the privately owned/state owned mineral and metalliferous mining company they perform a rescue operation. The major fire incident of 2013 in a Swedish underground mine led to the realization that there was a general lack of preparedness for managing these underground emergencies.Aim: The overall aim was to analyze the preparedness for response to major incidents in Swedish underground mines among personnel from mining companies, the rescue service, and emergency medical service.Methods: In Study I, questionnaires (n=741) assessing Swedish underground mining company personnel’s self-assessed preparedness for emergencies were analyzed by descriptive statistics, exploratory factor analysis, and multiple logistic regression. In Study II, individual interviews with EMS personnel (n=13) were analyzed with qualitative content analysis to identify the latent content. In Study III, six focus group interviews with personnel from mining companies (n=15), the rescue service (n=9), and EMS (n=4) were analyzed with qualitative content analysis and complemented with information from ten individual interviews with EMS personnel. In Study IV, documents (n=144) from collaboration meetings and full-scale exercises were analyzed deductively using the theory of expansive learning.Results: Most of the Swedish underground mining company personnel considered themselves prepared to act in case of major incidents, and about two thirds of the mining company personnel considered themselves moderately confident that they know how to take care of a seriously injured peer. Their self-perceived preparedness was associated with their familiarity with rescue procedures, their risk perception, and their experience of using self-protective and first aid equipment (Study I). Study II showed that EMS personnel trusted the rescue service and mining company personnel to perform the rescue operation and considered themselves as having a supportive role. In Study III, the mining company, rescue service, and EMS personnel considered that because of the unfamiliar underground mining environment, they have to prepare their organizations for major underground incidents in collaboration with each other. In Study IV, a tentative model was created for the development of an expansive learning process for the organizations’ exercise organizers during a set of collaboration meetings and full-scale exercises.Conclusion: The preparedness of the mining company, rescue service, and EMS personnel was analyzed through experiences from both real events and full-scale exercises. A holistic perspective of organizational preparedness for major incidents in underground mines has been generated. All organizations have their perspective of rescue operation response, but the shared objective is to save lives and care for the injured mining company personnel by performing an effective rescue operation in collaboration.
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| 7. |
- Liu, Yu, 1991-, et al.
(författare)
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Methodology for Digital Transformation with Internet of Things and Cloud Computing : A Practical Guideline for Innovation in Small- and Medium-Sized Enterprises
- 2021
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Ingår i: Sensors. - : MDPI. - 1424-8220. ; 21:16
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Tidskriftsartikel (refereegranskat)abstract
- Researches on the Internet of Things (IoT) and cloud computing have been pervasive in both the academic and industrial world. IoT and cloud computing are seen as cornerstones to digital transformation in the industry. However, restricted by limited resources and the lack of expertise in information and communication technologies, small- and medium-sized enterprises (SMEs) have difficulty in achieving digitalization of their business. In this paper, we propose a reference framework for SMEs to follow as a guideline in the journey of digital transformation. The framework features a three-stage procedure that covers business, technology, and innovation, which can be iterated to drive product and business development. A case study about digital transformation taking place in the vertical plant wall industry is detailed. Furthermore, some solution design principles that are concluded from real industrial practice are presented. This paper reviews the digital transformation practice in the vertical plant wall industry and aims to accelerate the pace of SMEs in the journey of digital transformation.
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| 8. |
- Liu, Yu, 1991-, et al.
(författare)
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Performance Evaluation of Containerization in Edge-Cloud Computing Stacks for Industrial Applications : A Client Perspective
- 2021
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Ingår i: IEEE Open Journal of the Industrial Electronics Society. - : IEEE. - 2644-1284. ; 2, s. 153-168
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Tidskriftsartikel (refereegranskat)abstract
- Today, the edge-cloud computing paradigm starts to gain increasing popularity, aiming to enable short latency, fast decision-making and intelligence at the network edge, especially for industrial applications. The container-based virtualization technology has been put on the roadmap by the industry to implement edge-cloud computing infrastructures. Has the performance of the container-based edge-cloud computing stacks reached industry requirement? In this paper, from the industrial client perspective, we provide a performance evaluation methodology and apply it to the state-of-the-art containerization-based edge-cloud computing infrastructures. The influences of the message sending interval, payload, network bandwidth and concurrent devices on full stack latency are measured, and the processing capability of executing machine learning tasks are benchmarked. The results show that containerization on the edge does not introduce noticeable performance degradation in terms of communication, computing and intelligence capabilities, making it a promising technology for the edge-cloud computing paradigm. However, there is a large room for performance improvement between current implementation of the edge-cloud infrastructure and the demanding requirements anticipated by time-critical industrial applications. We also emphasize and showcase that partitioning of an industrial application into microservices throughout the whole stack can be considered during solution design. The proposed evaluation methodology can be a reference to users of edge-cloud computing as well as developers to get a client perspective overview of system performance.
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| 9. |
- Ni, Zhongjun, 1992-, et al.
(författare)
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A Sensing System Based on Public Cloud to Monitor Indoor Environment of Historic Buildings
- 2021
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Ingår i: Sensors. - : MDPI. - 1424-8220. ; 21:16
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Tidskriftsartikel (refereegranskat)abstract
- Monitoring the indoor environment of historic buildings helps to identify potential risks, provide guidelines for improving regular maintenance, and preserve cultural artifacts. However, most of the existing monitoring systems proposed for historic buildings are not for general digitization purposes that provide data for smart services employing, e.g., artificial intelligence with machine learning. In addition, considering that preserving historic buildings is a long-term process that demands preventive maintenance, a monitoring system requires stable and scalable storage and computing resources. In this paper, a digitalization framework is proposed for smart preservation of historic buildings. A sensing system following the architecture of this framework is implemented by integrating various advanced digitalization techniques, such as Internet of Things, Edge computing, and Cloud computing. The sensing system realizes remote data collection, enables viewing real-time and historical data, and provides the capability for performing real-time analysis to achieve preventive maintenance of historic buildings in future research. Field testing results show that the implemented sensing system has a 2% end-to-end loss rate for collecting data samples and the loss rate can be decreased to 0.3%. The low loss rate indicates that the proposed sensing system has high stability and meets the requirements for long-term monitoring of historic buildings.
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| 10. |
- Ni, Zhongjun, 1992-, et al.
(författare)
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Enabling Preventive Conservation of Historic Buildings Through Cloud-based Digital Twins : A Case Study in the City Theatre, Norrköping
- 2022
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Ingår i: IEEE Access. - : Institute of Electrical and Electronics Engineers (IEEE). - 2169-3536. ; 10, s. 90924-90939
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Tidskriftsartikel (refereegranskat)abstract
- Historic buildings require good maintenance to sustain their function and preserve embodied heritage values. Previous studies have demonstrated the benefits of digitalization techniques in improving maintenance and managing threats to historic buildings. However, there still lacks a solution that can consistently organize data collected from historic buildings to reveal operating conditions of historic buildings in real-time and to facilitate various data analytics and simulations. This study aims to provide such a solution to help achieve preventive conservation. The proposed solution integrates Internet of Things and ontology to create digital twins of historic buildings. Internet of Things enables revealing the latest status of historic buildings, while ontology provides a consistent data schema for representing historic buildings. This study also gives a reference implementation by using public cloud services and open-source software libraries, which make it easier to be reused in other historic buildings. To verify the feasibility of the solution, we conducted a case study in the City Theatre, Norrköping, Sweden. The obtained results demonstrate the advantages of digital twins in providing maintenance knowledge and identifying potential risks caused by fluctuations of relative humidity.
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