Publikationer från Umeå universitet
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Examining the simulation-to-reality gap of a wheel loader digging in deformable terrain
No full textWe investigate how well a physics-based simulator can replicate a real wheel loader performing bucket filling in a pile of soil. The comparison is made using field-test time series of the vehicle motion and actuation forces, loaded mass, and total work. The vehicle was modeled as a rigid multibody system with frictional contacts, driveline, and linear actuators. For the soil, we tested discrete-element models of different resolutions, with and without multiscale acceleration. The spatiotemporal resolution ranged between 50–400 mm and 2–500 ms, and the computational speed was between 1/10,000 to 5 times faster than real time. The simulation-to-reality gap was found to be around 10% and exhibited a weak dependence on the level of fidelity, e.g., compatible with real-time simulation. Furthermore, the sensitivity of an optimized force-feedback controller under transfer between different simulation domains was investigated. The domain bias was observed to cause a performance reduction of 5% despite the domain gap being about 15%
Mutual capabilities : digital platforms in unpredictable pedagogical encounters
No full textThis paper examines the implications of platforms as a repertoire for knowing and relating the intensities of pandemic restrictions on teaching and schoolwork. Building on platformisation in education, what work platforms do in unpredictable everyday pedagogical encounters is investigated. Specifically, the paper explores a methodological potential with platforms’ capabilities to pull some things together while supressing others. Drawing on ethnographic interviews with teachers and students in Sweden in 2021, everyday platform practices such as handling assignments, requests to connect online, and repetitive notifications are analysed with actor-network theory. Tensions of discomforts, resistance, and trust unfold critical acknowledgements of digital platforms as more complex objects than shaping pedagogical encounters prior to their practices. Instead, capabilities emerge as mutually rendered. The analysis shows that platforming well-bounded domains for clearer and more flexible teaching and schoolwork incoherently make educational practices less so, highlighting crucial openings to surprise and curiosity of pedagogical encounters
Care for the learning of mathematics : put to the test
No full textThis article reports on a study of mandatory assessment in mathematics for preschool-class children (aged six) and teachers' opportunities to advocate Care for the learning of mathematics. Care for learners and Care for mathematics intersected in the teachers' Grouping of students and their ability to Know the student. These play out as teachers promote availability and justice to students, and as teachers strive to make students' knowledge visible, promote accuracy and gain legitimacy. It is concluded that teachers' opportunities to advocate care for the learning of mathematics needs to be present also in the administration of assessment and to be put in the context of the school's culture and student population, for teachers to be able to promote fair assessment for each student
Who thinks ideologically about welfare state reform? Partisanship and attitude consistency in politicians’ and mass public perceptions about the consequences of welfare service privatization in Sweden
No full textWhen studying attitudes toward the welfare state or evaluations of welfare reforms, research has tended to focus on what people think rather than how they think about specific issues. Moreover, the effects of the mobilizing efforts of political parties on attitudes and belief systems are often theorized separately from the normative institutional feedback effects common to the welfare state literature. In this paper, I propose that elite political rhetoric and institutional norms may exert dual pressures leading to partisan differences in the propensity to think ideologically among the mass public, defined as a positive relationship between holding internally consistent attitudes and taking a partisan issue position. Drawing on the case of welfare service privatization in Sweden, I point out how the rhetoric of the right – emphasizing choice and private property – frequently contradicts norms about universality long espoused by the Swedish welfare state, while the rhetoric of the left – emphasizing equality of access and outcomes – is better aligned with such institutional norms. The analysis of survey data demonstrated that centre-right sympathizers, the prime receivers of conflicting elite versus institutional messages, frequently took a middling position, being neither positive nor negative, to the consequences of welfare service privatization, and that, unlike centre-right politicians and sympathizers and politicians of left parties, this position did not differ according to attitude consistency. Furthermore, political interest enhanced this relationship among right sympathizers but was of little consequence to left sympathizers, implying that in the case of a conflict between institutional norms and political rhetoric, only the most attentive sympathizers are likely to engage in ideological thinking on the basis of partisanship
Rally around the flag? Explaining changes in Swedish public opinion toward NATO membership after Russia's invasion of Ukraine
No full textAfter Russia's invasion of Ukraine, Sweden changed its historic position of non-alignment and applied for membership in the NATO military alliance. This decision coincided with a shift in public opinion in favor of NATO membership, in what has been described as the largest and fastest shift in public opinion that has ever been measured in Swedish history. We examine two aspects of this “rally around the flag effect” to explain this change, the effect of the crisis event itself and the effect of political elite influence by analyzing within-individual changes of a Swedish university student population at three different time points. We find that after the Russian invasion but before the decision was made to join NATO, public opinion was still split with roughly 40% still opposed. However, after the decision was made to apply for membership to the alliance many people changed their position (32%), either making up their minds or switching position entirely. We show that these changes were likely in response to the decision to join, and that they were moderated by individuals’ previously established political preferences
Perspectives on connecting climate change and health
No full textOver the past century, the Earth’s climate has undergone rapid and unprecedented changes, manifested in a noticeable increase in average global temperature. This has led to shifts in precipitation patterns, increased frequency of extreme weather events (e.g. hurricanes, heatwaves, droughts and floods), alterations in ecosystems, and rising sea levels, impacting both natural environments and human societies, health and wellbeing. Without deep and urgent emission cuts and effective adaptation, the toll of climate change on human health and wellbeing is likely to grow. Here, we address the complex relationship between climate change and health, and discuss ways forward for transdisciplinary research and collaboration that can motivate more ambitious mitigation policies and help develop solutions to adapt to the crisis
Teaching protein structure and function through molecular visualization
No full textThe function of proteins is governed by their three-dimensional structure. This structure is determined by the chemical characteristics and atomic interactions of amino acids. Students of biochemistry, with a particular focus on protein chemistry, benefit from looking at protein structures and understanding how proteins are built and fold. Due to their three-dimensional nature, static two-dimensional representations in textbooks can be limiting to student learning. Here, we developed a series of tutorials that introduce students to molecular graphics software. The students are challenged to apply the software to look at proteins and to get a deeper understanding of how amino acid properties are linked to structure. We also familiarize students with some of the latest tools in computational structural biology. Students performed the tutorials with visual enthusiasm and reported general satisfaction in being able to visualize theoretical concepts learned during lectures. We further stimulated student engagement by allowing space for self-exploration. We share the tutorial instructions for other teachers to build on them, and we also offer suggestions for further improvement based on student feedback. In summary, we present a series of tutorials aimed at students of an advanced course in protein biochemistry to enable them to explore the universe of protein structures and how those relate to function
Multimodal collective sensemaking in extreme contexts : evidence from maritime search and rescue
No full textIn extreme contexts, actors must often engage in collective sensemaking to enablecoordinated action. While prior research has established that cognitive disparities and emotivedistractions disrupt collective sensemaking, we lack theory on how actors overcome these com-mon challenges in extreme contexts. To address this shortcoming, we conducted a process study,collecting unique multi-perspective video and archival data during a maritime search and rescuemission in the Aegean Sea where actors (i.e., rescue crew members and refugees) faced cognitivedisparities (e.g., different levels of maritime expertise) and distracting emotions (e.g., fear, anxiety,and tension) yet needed to coordinate their actions to ensure a safe evacuation. We draw on thisdata to develop a collective sensemaking model that details the auxiliary process steps and mul-timodal communication – verbal, para-verbal, and non-verbal cues – actors use to alternatelyframe emotional states and convey task-related information. Our model demonstrates howactors, through multimodal collective sensemaking, overcome the challenges posed by cognitivedisparities and distracting emotions in extreme contexts. It thus adds a dynamic emotive andbodily perspective to the predominantly cognitive and verbal understanding in sensemakingtheory, and also has implications for practitioners working in extreme contexts
The autonomy of middle managers in local education administrations : A Swedish viewpoint
No full textThe focus of this article is on how the relative autonomy of middle managers is expressed in the context of local education administrations. In the Swedish education system, middle managers often constitute the link between principals at schools and local government education administrators. Little is known about what such middle managers do and why. To fill this knowledge gap, this article presents and discusses the results of interviews with middle managers, chief education officers and principals linked to four local education administrations in Sweden. A previously developed analytical model has been adapted to facilitate the interpretation of results and how they relate to the concept of autonomy in education administration. The framework encompasses four cognitive domains: educational, social, developmental, and administrative. The results display middle manager autonomy as fostered and limited by all four domains and how the use of relative autonomy varies between middle managers. There are differences between middle managers in separate local education administrations and middle managers working in the same organisation. A major finding is that autonomy is always conditioned, not only by organisation but significantly also by cognition and administrative interaction
Perioperative patient safety indicators : a Delphi study
No full textAim: To identify, define and achieve consensus on perioperative patient safety indicators within a Swedish context. Design: A modified Delphi method. Methods: A purposeful sample of 22 experts, all experienced operating room nurse specialists, was recruited for this study. A questionnaire was constructed incorporating statements derived from a preceding study. The experts were asked to rate the importance of each statement concerning patient safety during the perioperative phase. The data collection occurred through an online survey platform between November 2022 and April 2023. The CREDES checklist guided the reporting of this study. Results: The three-round Delphi study resulted in consensus on 73 statements out of 103, encompassing 74% process indicators and 26% structure indicators. Key areas of consensus included the use of the Surgical Safety Checklist and optimizing the operating room environment. Conclusion: Consensus was reached on perioperative safety indicators, underscoring the intricate challenges involved in ensuring patient safety in the operating room. It emphasizes the important integration of both structure and process indicators for comprehensive safety assessment during surgical procedures. Recognizing the difficulty in measuring factors like teamwork and communication, essential for patient safety, the study offers practical guidance. It underlines a balanced approach and specific consensus areas applicable in clinical practice to enhance perioperative patient safety. Implications for the profession and patient care:This study provides concrete practice guidance and establishes a structured framework for evaluating perioperative care processes. It emphasizes the critical role of professionals having the necessary skills and being present during surgical procedures. Additionally, the study underscores the paramount importance of effective communication and teamwork within the operating room team, substantively contributing to overall patient safety enhancement. Impact: The study focused on addressing the challenge of ensuring patient safety in operating rooms, acknowledging the persistent complications related to surgery despite global efforts to eliminate avoidable harm in healthcare. Consensus was reached on 73 crucial indicators for perioperative patient safety, emphasizing a balanced approach integrating both process and structure indicators for a comprehensive assessment of safety during surgical procedures. The study has a broad impact on professionals and healthcare systems, providing concrete guidance for practice and offering a structured process for evaluating perioperative care. Reporting Method: The study is reported informed by 'Guidance on Conducting and REporting DElphi Studies (CREDES) in palliative care: Recommendations derived from a methodological systematic review'. Patient or Public Contribution: No patient or public contribution